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Battery Life on a SmartPhone - The Riddle, The Enigma
I have been asked to port my original Battery Guide over to the SGS3 threads, so here it is in all it's glory.
This thread was also recently featured on the XDA Portal. Thanks to Haroon Q. Raja for the write up.
Attaining 20+ hours of battery life is not only possible it is totally attainable with most phone configurations. The secret to making this happen is, understanding what are the contributing factors are and knowing what to do first.
This guide will help. After reading this guide, you will be able to understand how to end power eating culprits and answer those same questions we see over and over in the threads...... that is .... solving the passive battery drain and get the 20 hours of battery life we all want and desire.
As we all know, all Samsung Galaxy S 3's and their Chipsets are not created equal. So if something works for one person and not the other, then is it a software, hardware or human error. Chances are it is a combination of all three. Hopefully this can slim those down a bit and answer some questions that you might have or have seen. I have tried to get almost everything I can think of and put it in one place.
You can click on the Post # below and it will take you directly to that post if you wanted to skip some things (although I don't know why you would want to do that)
Post 1: Tips and Tricks
Post 2: Roms/Kernels, OverClocking/Undervolting, Governors & I/O Schedulers
Post 3: Memory Management
Post 4: Apps (for your download pleasure)
Post 5: Proof
I will be using satirical stories and anecdotes to get my point across below. Not meant to offend or point fingers at anyone. I am just using real life references to get to the point. Also I am not much for fancy colors. I tried it at the top here but not so much further down. If there is something specific I want to call attention too, I will BOLD it and maybe RED it too.
This is not a GUIDE to get better battery life but rather a GUIDEline to get it. What is the difference, you say? A Guide is a step by step process that you must/should follow to get the outcome that the person who created it wanted you to get [A+B+C+D should = E]. A Guideline is more of a recommendation that allows some choice or flexibility in the understanding, execution or use [A +B-(C+D) can = E].
TopShelf10 has this to say about getting the most out of your battery life
the problem is, people want to believe that they can save battery without changing their usage habits. this simply is not possible. no rom or kernel will realistically do this for you. if you remove 1 brick from a bag full of 15 bricks, the bag will be lighter, but still very heavy. you need to download "spare parts" or "process monitor" from the market and start analyzing the way your apps are acting. also look into data syncs that are happening in the background. apps that stay open behind your back/what they are doing 9an app called "autostarts" can prevent apps from self-running under certain scenarios). animation speed. polling for notifications. gps. wifi scans. overclocking. cpu/ram usage. proper sleep. widgets. brightness. 2g/3g. data usage. call time. text volume. - THESE are the things that really affect your battery life.
bottom line is, if you truly want to save battery you are going to have to get your hands dirty...there simply isnt a one-click (or one-flash) solution.
Click to expand...
Click to collapse
Below is a list of fundamental things that can be done without rooting or custom ROM/Kernels. (Standard disclaimer applies: You use it, you set it and you are responsible)
1. Be Realistic -
Do you really think that you can get two whole days out of your battery? If you do, then you must have a very important pile of papers it is sitting on to not even pick up your phone for that long. These are phones. These are mini-computers. These are arcade games. And they want, dare I say, need to be played with, talked on or downloaded to. USE YOUR PHONE.
2. Syncing –
I know you are very important and you need to know what LeBron is doing right now, just in case you get a cup for a coffee and he might be in Starbucks at the same time and you get your picture taken with him and upload it to Facebook, Twitter or Google+. That is fine and I applaud you for it and will probably download the picture and Photoshop myself in your place. This is not the problem. Syncing your accounts is. That is what is causing battery drain. Do you really need to have your FB widget (see widgets section) streaming all day long? Does Kim K.’s endorsement of a potato chip really affect your everyday life? I doubt it. Kill them (not LeBron or Kim K. but rather the auto-syncing). Every time you “friend” someone their numbers, contact info gets sync’d to your phone. Also, there are settings in Facebook, Twitter and Google+ that you can upload pictures instantly. Don’t do that. Once you do, it is out in the Ether-World and just swallowed a bunch of battery doing it too.
Settings>Accounts and Sync>Auto-sync>uncheck it
3. Widgets –
They look cool. But widgets are nothing more than RAM and battery hungry monsters that you purposely put in your home screen. Think about it. What does a widget really do? All it really does is monitor an app that you have running. So not only is it running and taking up battery and RAM but the app that it is linked to is running in the background al’ a Facebook, Twitter, Google+, CNBC, MSNBC, BBC,… the list goes on and on because they want us to put THEM on our home page.
What a great marketing campaign the widget is.
“Hey look at me new home screen”
“Cool. Hey what widget is that?”
“Oh, it is X”
“Nice, I’ll have to download that tonight when I get home” and then and there they have you and your battery.
4. Apps –
You have to pay attention to your apps. I repeat. You have to pay attention to your apps. Especially if they run in the background. This can be anything from a harmless .99c game to a monster like Live Wallpaper. The battery drain threat is twofold here because the app is running in the background but it could also be using its anonymous data collection abilities and sending that back to the Mothership. Ever wonder why you have a 4/3G with up and down arrows in your status bar when your phone is just sitting there? This is because some app is transmitting data, whether you are using it or not. There are apps in the market that monitor these situations like Watchdog or kill the data link when the lock screen is enabled like Juice Defender (see Apps below) or you can adjust app permissions like LBE Privacy Guard. Data transfer is #2 on the What Kills My Battery list.
5. Display/ Wifi/ Airplane Mode/ Animations/ Location –
Display:
#1 when it comes to what is eating your battery. Always has been and always will be. Accept it and try to do something about it. This part is easy. Just lower the brightness. You can use Auto or set it as a brightness that is low but you are still able to see well enough to function. Live Wallpapers fall into this category. They are cool to look at but static ones take up less RAM and also less display because they are not running all the time in the background. These screens are bright at 100%, so tone it down. (see Apps below).
WIFI:
Another helpful tip is setting your WIFI sleep policy to Always. This can be done by going here Setting>Wireless>WIFI> Menu key>Advanced>WIFI Sleep Policy and set it to Always.
--->Then you can also do this Build.Prop edit as well (this is if you are Rooted, of course)
Allows your wifi to scan less, saving more battery:
wifi.supplicant_scan_interval=240 (I have mine set to 420)
Airplane Mode Toggle:
DocHoliday77 has this very helpful trick regarding Airplane Mode and how it effects your Data/Battery life.
I generally suggest toggling Airplane Mode on/off as a recommended step before running data speed tests, and to help with signal strength.
When you move from one area to another, generally your phone will automatically switch to another tower as the signal/connection to the current tower degrades. This is perfectly fine while travelling since you are not in a single location for very long. The problem comes into play once you have reached your destination. For many people, when they get home from work, for example, their phone will remain connected to the last tower they switched to on their drive home. However, there is very often a tower closer to their home that can provide better signal. The phone does not automatically switch to the better tower because it is still close enough to the current one to have adequate signal. By toggling Airplane Mode on/off, when the radio turns back on it will search for the strongest signal and will now connect to the closer, better tower!
Stronger signal will directly translate to a better battery. The better your signal, the less power is consumed for ALL radio operations (Including Cell Standby, Data, and Voice)! When the signal is weak, the radio requires more power to transmit to the receiver (the tower), which translates to higher battery use.
Toggle Airplane Mode on then off again to force the phone to connect to the best possible tower.
Animations: Set Settings > Display > Animations to .5 animations.
Location:
As pointed out by Arlanthir if your device is broadcasting your location, then you may need to rethink whether or not that is good for you and your battery. Generally, your location is based off GPS, Wifi or Mobile Networks. If these are on, then battery drain is occurring. Sometimes you need your location to work with Maps, Google Now, but most of the time, it is because of the unholy trinity, Facebook, Twitter and Google+. I mean, how do you think you "Check-In' at places right?
If you don't utilise these types of features on those three, then go into Settings>Location and untick them. Now there are also other apps like MLB At-Bat and the like that require location for blacked out games or services based on your location. I find that there is always a toast in those applications that notifies me and allows me to turn then on as needed. Then when I am done, I can turn them off.
These are 5 fundamental things that you can do to help reduce battery drain and get some more life out of your phone. Anyone can do these. All you have to do is watch your phone and use some common sense. “Why does my battery drain after only 6 hours? All I was doing was checking Facebook.” Do you really need to be on Facebook for that long of a time? I doubt it. How many services do you have running? How many tasks do you have running? (Android does a good job of shutting down tasks on its own, but if you are using a task killer, it takes more juice to start up an app than to turn it back on, so to say.) Think of it like an airplane. Takes more fuel to get up in the clouds, but once you are up there, it is pretty much coasting along with way less burn.
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A special thanks to DocHoliday77 for convincing me to port this over and also for some of his helpful tips as well. You know who he is, so hit his thanks button to show your appreciation for all he does for this community.
ROMs are key things to think about when it comes to battery life. They can be fully established and working fine, can be RCs and still in development or they can be Alpha/Betas and completely experimental or just beginning. Choosing the best ROM or Kernel is going to depend on what YOU want out of your phone. Do you want a stable 4.0 ROM that has great battery life but not the customizability as MIUI or CM10 or AOKP? Because we have so many versions of 4.0.x ROMs that are official and almost all the sources have been attained, they have been Optimized to their fullest and some outstanding tweaks have really brought them to the forefront in daily drivers. Again, the choice is up to you.
Kernels go hand-in-hand with your ROM. Does the kernel support Overclocking or Undervolting. How much RAM and what tweaks are included in the kernel? Does THIS kernel work with THAT ROM? These are all spelled out for you in the OP of each kernel (and ROM) for you to find out. Read them because if you don’t, you’ll bork your phone and then your next post will be, “Help. I Bricked my phone”.
Overclocking/Undervolting –
If you don’t already know what Overclocking is, well it is pretty much self-explanatory. You can Overclock your CPU above the clock-speed that Samsung, T-Mobile governed it at. This can be done with apps like SetCPU (here and here and CPUtuner,…Generally have to be ROOTed to do these but if you are flashing ROMs and Kernels then you probably already are. UnderVolting is basically what it sounds like too. You are Undervolting your CPU to conserve battery.
This can be one of the best ways for a more advanced user to save battery. Overclocking is great to see those really cool Quadrant scores. Wow!!! But it also ramps up the battery drain, as well as temperature which can shorten your battery’s TOTAL life. If you want to Overclock to 1.8-2.1 just to see what you score on Quadrant or SmartBench, then do it for that time. Most ROMs/Kernels run stable and smooth at or about 1.2-1.6 with minimal effects on battery (as long as you do tweaks in above post). If you decide to Undervolt you can use Pimp My CPU, Voltage Control, SetCPU,... to do this but take care to step it down slowly until you find the right settings for you or you will see random reboots or phone freezes and those suck trying to diagnose.
***Please note that whether you Overclock or Undervolt, do NOT “Set on Boot” until you know that they are going to work. Otherwise if it doesn’t work and your phone randomly reboots, you will get into a boot cycle (not a bootloop) because you put them in “Set on Boot”. You must test before you should do this.***
Example scale of OC/UV setting from Ktoonsez' thread:
[KERNEL][TMO][AOSP/Touchwiz][JELLYBEAN & ICS][10/31/2012] KT747 - LJ7 - KTweaker
Stock___________________Undervolt startoff point___________________jerrygooch
Mhz - mV___________________Mhz - mV___________________________Mhz - mV
1890 - 1300___________________1890 - 1300____________________________1890 - 1200
1809 - 1275___________________1809 - 1250____________________________1809 - 1150
1728 - 1250___________________1728 - 1200____________________________1728 - 1100
1674 - 1200___________________1674 - 1175 ____________________________1674 - 1075
1512 - 1200___________________1512 - 1200 ____________________________1512 - 1075
1458 - 1187___________________1458 - 1187 ____________________________1458 - 1050
1404 - 1187___________________1404 - 1187 ____________________________1404 - 1050
1350 - 1175___________________1350 - 1175 ____________________________1350 - 1025
1296 - 1175___________________1296 - 1175 ____________________________1296 - 1025
1242 - 1150___________________1242 - 1150 ____________________________1242 - 1000
1188 - 1150___________________1188 - 1150 ____________________________1188 - 1000
1134 - 1125___________________1134 - 1125 ____________________________1134 - 975
1080 - 1125___________________1080 - 1125 ____________________________1080 - 975
1026 - 1075___________________1026 - 1075 ____________________________1026 - 925
972 - 1075____________________972 - 1075 _____________________________972 - 925
918 - 1050____________________918 - 1050 _____________________________918 - 900
864 - 1050____________________864 - 1050 _____________________________864 - 900
810 - 1025____________________810 - 1025 _____________________________810 - 875
756 - 1025____________________756 - 1025 _____________________________756 - 875
702 - 975_____________________702 - 925 ______________________________702 - 825
648 - 975_____________________648 - 925 ______________________________648 - 825
594 - 950_____________________594 - 850 ______________________________594 - 800
540 - 950_____________________540 - 850 ______________________________540 - 800
486 - 925_____________________486 - 850 ______________________________486 - 800
384 - 925_____________________384 - 825 ______________________________384 - 800
192 - 900_____________________192 - 825 ______________________________192 - 800
Governors and I/O Schedulers
Governors and I/O schedulers also have a huge impact on how your CPU regulates.
Here is about everything you need to know about them from Recognized Contributor droidphile from his thread:
[REF][TWEAKS] Kernel Governors, Modules, I/O Schedulers, CPU Tweaks, AIO App Configs .
If you haven't checked out his thread do yourself a favor and do it. A vast amount of information. Be sure to hit his THANKS too.
Governors
I) MANUAL:
These are the 19 governors we're talking about.
1) Ondemand
2) Ondemandx
3) Conservative
4) Interactive
5) Interactivex
6) Lulzactive
7) Lulzactiveq
8) Smartass
9) SmartassV2
10) Intellidemand
11) Lazy
12) Lagfree
13) Lionheart
14) LionheartX
15) Brazilianwax
16) SavagedZen
17) Userspacce
18) Powersave
19) Performance
NOTE: Info on Samsung's own multi-core aware governor - Pegasusq is here
1) Ondemand:
Default governor in almost all stock kernels. One main goal of the ondemand governor is to switch to max frequency as soon as there is a CPU activity detected to ensure the responsiveness of the system. (You can change this behavior using smooth scaling parameters, refer Siyah tweaks at the end of 3rd post.) Effectively, it uses the CPU busy time as the answer to "how critical is performance right now" question. So Ondemand jumps to maximum frequency when CPU is busy and decreases the frequency gradually when CPU is less loaded/apporaching idle. Even though many of us consider this a reliable governor, it falls short on battery saving and performance on default settings. One potential reason for ondemand governor being not very power efficient is that the governor decide the next target frequency by instant requirement during sampling interval. The instant requirement can response quickly to workload change, but it does not usually reflect workload real CPU usage requirement in a small longer time and it possibly causes frequently change between highest and lowest frequency.
2) Ondemandx:
Basically an ondemand with suspend/wake profiles. This governor is supposed to be a battery friendly ondemand. When screen is off, max frequency is capped at 500 mhz. Even though ondemand is the default governor in many kernel and is considered safe/stable, the support for ondemand/ondemandX depends on CPU capability to do fast frequency switching which are very low latency frequency transitions. I have read somewhere that the performance of ondemand/ondemandx were significantly varying for different i/o schedulers. This is not true for most of the other governors. I personally feel ondemand/ondemandx goes best with SIO I/O scheduler.
3) Conservative:
A slower Ondemand which scales up slowly to save battery. The conservative governor is based on the ondemand governor. It functions like the Ondemand governor by dynamically adjusting frequencies based on processor utilization. However, the conservative governor increases and decreases CPU speed more gradually. Simply put, this governor increases the frequency step by step on CPU load and jumps to lowest frequency on CPU idle. Conservative governor aims to dynamically adjust the CPU frequency to current utilization, without jumping to max frequency. The sampling_down_factor value acts as a negative multiplier of sampling_rate to reduce the frequency that the scheduler samples the CPU utilization. For example, if sampling_rate equal to 20,000 and sampling_down_factor is 2, the governor samples the CPU utilization every 40,000 microseconds.
4) Interactive:
Can be considered a faster ondemand. So more snappier, less battery. Interactive is designed for latency-sensitive, interactive workloads. Instead of sampling at every interval like ondemand, it determines how to scale up when CPU comes out of idle. The governor has the following advantages: 1) More consistent ramping, because existing governors do their CPU load sampling in a workqueue context, but interactive governor does this in a timer context, which gives more consistent CPU load sampling. 2) Higher priority for CPU frequency increase, thus giving the remaining tasks the CPU performance benefit, unlike existing governors which schedule ramp-up work to occur after your performance starved tasks have completed. Interactive It's an intelligent Ondemand because of stability optimizations. Why??
Sampling the CPU load every X ms (like Ondemand) can lead to under-powering the CPU for X ms, leading to dropped frames, stuttering UI, etc. Instead of sampling the CPU at a specified rate, the interactive governor will check whether to scale the CPU frequency up soon after coming out of idle. When the CPU comes out of idle, a timer is configured to fire within 1-2 ticks. If the CPU is very busy between exiting idle and when the timer fires, then we assume the CPU is underpowered and ramp to max frequency.
5) Interactivex:
This is an Interactive governor with a wake profile. More battery friendly than interactive.
6) Lulzactive:
This new find from Tegrak is based on Interactive & Smartass governors and is one of the favorites.
Old Version: When workload is greater than or equal to 60%, the governor scales up CPU to next higher step. When workload is less than 60%, governor scales down CPU to next lower step. When screen is off, frequency is locked to global scaling minimum frequency.
New Version: Three more user configurable parameters: inc_cpu_load, pump_up_step, pump_down_step. Unlike older version, this one gives more control for the user. We can set the threshold at which governor decides to scale up/down. We can also set number of frequency steps to be skipped while polling up and down.
When workload greater than or equal to inc_cpu_load, governor scales CPU pump_up_step steps up. When workload is less than inc_cpu_load, governor scales CPU down pump_down_step steps down.
Example:
Consider
inc_cpu_load=70
pump_up_step=2
pump_down_step=1
If current frequency=200, Every up_sampling_time Us if cpu load >= 70%, cpu is scaled up 2 steps - to 800.
If current frequency =1200, Every down_sampling_time Us if cpu load < 70%, cpu is scaled down 1 step - to 1000.
7) Lulzactiveq:
Lulzactiveq is a modified lulzactive governor authored by XDA member robertobsc and is adapted in Siyah kernel for GS2 and GS3. Lulzactiveq aims to optimize the second version of luzactive from Tegrak by a) providing an extra parameter (dec_cpu_load) to make scaling down more sensible, and b) incorporating hotplug logic to the governor. Luzactiveq is the first ever interactive based governor with hotplugging logic inbuilt (atleast the first of its kind for the exynos platform). When CPU comes out of idle loop and it's time to make a scaling decision, if load >= inc_cpu_load CPU is scaled up (like original luzactiveq) and if load <dec_cpu_load, CPU is scaled down. This possibly eliminates the strict single cut-off frequency for luzactiveq to make CPU scaling decisions. Also, stand hotplug logic runs as a separate thread with the governor so that external hotplugging logic is not required to control hotplug in and out (turn On and Off) CPU cores in multi core devices like GS2 or GS3. Only a multi core aware governor makes real sense on muti-core devices. Lulzactiveq and pegasusq aims to do that.
8) Smartass:
Result of Erasmux rewriting the complete code of interactive governor. Main goal is to optimize battery life without comprising performance. Still, not as battery friendly as smartassV2 since screen-on minimum frequency is greater than frequencies used during screen-off. Smartass would jump up to highest frequency too often as well.
9) SmartassV2:
Version 2 of the original smartass governor from Erasmux. Another favorite for many a people. The governor aim for an "ideal frequency", and ramp up more aggressively towards this freq and less aggressive after. It uses different ideal frequencies for screen on and screen off, namely awake_ideal_freq and sleep_ideal_freq. This governor scales down CPU very fast (to hit sleep_ideal_freq soon) while screen is off and scales up rapidly to awake_ideal_freq (500 mhz for GS2 by default) when screen is on. There's no upper limit for frequency while screen is off (unlike Smartass). So the entire frequency range is available for the governor to use during screen-on and screen-off state. The motto of this governor is a balance between performance and battery.
10) Intellidemand:
Intellidemand aka Intelligent Ondemand from Faux is yet another governor that's based on ondemand. Unlike what some users believe, this governor is not the replacement for OC Daemon (Having different governors for sleep and awake). The original intellidemand behaves differently according to GPU usage. When GPU is really busy (gaming, maps, benchmarking, etc) intellidemand behaves like ondemand. When GPU is 'idling' (or moderately busy), intellidemand limits max frequency to a step depending on frequencies available in your device/kernel for saving battery. This is called browsing mode. We can see some 'traces' of interactive governor here. Frequency scale-up decision is made based on idling time of CPU. Lower idling time (<20%) causes CPU to scale-up from current frequency. Frequency scale-down happens at steps=5% of max frequency. (This parameter is tunable only in conservative, among the popular governors )
To sum up, this is an intelligent ondemand that enters browsing mode to limit max frequency when GPU is idling, and (exits browsing mode) behaves like ondemand when GPU is busy; to deliver performance for gaming and such. Intellidemand does not jump to highest frequency when screen is off.
11) Lazy:
This governor from Ezekeel is basically an ondemand with an additional parameter min_time_state to specify the minimum time CPU stays on a frequency before scaling up/down. The Idea here is to eliminate any instabilities caused by fast frequency switching by ondemand. Lazy governor polls more often than ondemand, but changes frequency only after completing min_time_state on a step overriding sampling interval. Lazy also has a screenoff_maxfreq parameter which when enabled will cause the governor to always select the maximum frequency while the screen is off.
12) Lagfree:
Lagfree is similar to ondemand. Main difference is it's optimization to become more battery friendly. Frequency is gracefully decreased and increased, unlike ondemand which jumps to 100% too often. Lagfree does not skip any frequency step while scaling up or down. Remember that if there's a requirement for sudden burst of power, lagfree can not satisfy that since it has to raise cpu through each higher frequency step from current. Some users report that video playback using lagfree stutters a little.
13) Lionheart:
Lionheart is a conservative-based governor which is based on samsung's update3 source. Tweaks comes from 1) Knzo 2) Morfic. The original idea comes from Netarchy. See here. The tunables (such as the thresholds and sampling rate) were changed so the governor behaves more like the performance one, at the cost of battery as the scaling is very aggressive.
To 'experience' Lionheart using conservative, try these tweaks:
sampling_rate:10000 or 20000 or 50000, whichever you feel is safer. (transition latency of the CPU is something below 10ms/10,000uS hence using 10,000 might not be safe).
up_threshold:60
down_threshold:30
freq_step:5
Lionheart goes well with deadline i/o scheduler. When it comes to smoothness (not considering battery drain), a tuned conservative delivers more as compared to a tuned ondemand.
14) LionheartX
LionheartX is based on Lionheart but has a few changes on the tunables and features a suspend profile based on Smartass governor.
15) Brazilianwax:
Similar to smartassV2. More aggressive ramping, so more performance, less battery.
16) SavagedZen:
Another smartassV2 based governor. Achieves good balance between performance & battery as compared to brazilianwax.
17) Userspace:
Instead of automatically determining frequencies, lets user set frequencies.
18) Powersave:
Locks max frequency to min frequency. Can not be used as a screen-on or even screen-off (if scaling min frequency is too low).
19) Performance:
Sets min frequency as max frequency. Use this while benchmarking!
So, Governors can be categorized into 3/4 on a high level:
1.a) Ondemand Based:
Works on "ramp-up on high load" principle. CPU busy-time is taken into consideration for scaling decisions. Members: Ondemand, OndemandX, Intellidemand, Lazy, Lagfree.
1.b) Conservative Based:
Members: Conservative, Lionheart, LionheartX
2) Interactive Based:
Works on "make scaling decision when CPU comes out of idle-loop" principle. Members: Interactive, InteractiveX, Lulzactive, Luzactiveq, Smartass, SmartassV2, Brazilianwax, SavagedZen.
3) Weird Category:
Members: Userspace, Powersave, Performance.
I/O Schedulers
1) Noop
Inserts all the incoming I/O requests to a First In First Out queue and implements request merging. Best used with storage devices that does not depend on mechanical movement to access data (yes, like our flash drives). Advantage here is that flash drives does not require reordering of multiple I/O requests unlike in normal hard drives.
Advantages:
Serves I/O requests with least number of cpu cycles. (Battery friendly?)
Best for flash drives since there is no seeking penalty.
Good throughput on db systems.
Disadvantages:
Reduction in number of cpu cycles used is proportional to drop in performance.
2) Deadline
Goal is to minimize I/O latency or starvation of a request. The same is achieved by round robin policy to be fair among multiple I/O requests. Five queues are aggressively used to reorder incoming requests.
Advantages:
Nearly a real time scheduler.
Excels in reducing latency of any given single I/O.
Best scheduler for database access and queries.
Bandwidth requirement of a process - what percentage of CPU it needs, is easily calculated.
Like noop, a good scheduler for solid state/flash drives.
Disadvantages:
When system is overloaded, set of processes that may miss deadline is largely unpredictable.
3) CFQ
Completely Fair Queuing scheduler maintains a scalable per-process I/O queue and attempts to distribute the available I/O bandwidth equally among all I/O requests. Each per-process queue contains synchronous requests from processes. Time slice allocated for each queue depends on the priority of the 'parent' process. V2 of CFQ has some fixes which solves process' i/o starvation and some small backward seeks in the hope of improving responsiveness.
Advantages:
Considered to deliver a balanced i/o performance.
Easiest to tune.
Excels on multiprocessor systems.
Best database system performance after deadline.
Disadvantages:
Some users report media scanning takes longest to complete using CFQ. This could be because of the property that since the bandwidth is equally distributed to all i/o operations during boot-up, media scanning is not given any special priority.
Jitter (worst-case-delay) exhibited can sometimes be high, because of the number of tasks competing for the disk.
4) BFQ
Instead of time slices allocation by CFQ, BFQ assigns budgets. Disk is granted to an active process until it's budget (number of sectors) expires. BFQ assigns high budgets to non-read tasks. Budget assigned to a process varies over time as a function of it's behavior.
Advantages:
Believed to be very good for usb data transfer rate.
Believed to be the best scheduler for HD video recording and video streaming. (because of less jitter as compared to CFQ and others)
Considered an accurate i/o scheduler.
Achieves about 30% more throughput than CFQ on most workloads.
Disadvantages:
Not the best scheduler for benchmarking.
Higher budget assigned to a process can affect interactivity and increased latency.
5) SIO
Simple I/O scheduler aims to keep minimum overhead to achieve low latency to serve I/O requests. No priority quesues concepts, but only basic merging. Sio is a mix between noop & deadline. No reordering or sorting of requests.
Advantages:
Simple, so reliable.
Minimized starvation of requests.
Disadvantages:
Slow random-read speeds on flash drives, compared to other schedulers.
Sequential-read speeds on flash drives also not so good.
6) V(R)
Unlike other schedulers, synchronous and asynchronous requests are not treated separately, instead a deadline is imposed for fairness. The next request to be served is based on it's distance from last request.
Advantages:
May be best for benchmarking because at the peak of it's 'form' VR performs best.
Disadvantages:
Performance fluctuation results in below-average performance at times.
Least reliable/most unstable.
7) Anticipatory
Based on two facts
i) Disk seeks are really slow.
ii) Write operations can happen whenever, but there is always some process waiting for read operation.
So anticipatory prioritize read operations over write. It anticipates synchronous read operations.
Advantages:
Read requests from processes are never starved.
As good as noop for read-performance on flash drives.
Disadvantages:
'Guess works' might not be always reliable.
Reduced write-performance on high performance disks.
Some Kernel Settings from Users out "there" (Note: These are for the SGS3 kernels):
Swifks using LeanKernel (4.3 kernel/4.2 OS):
Swiftks said:
Just thought I'd share my settings:
Governor: InteractiveX
Custom Settings:
go_hispeed_low = 95
screen_off_maxfreq = 486000
Scheduler: ROW
Min: 192 MHz
Max: 1512 MHz
Frequency Lock: ON
MP-Decision: OFF
Multicore Power Saving: 1
GPU Governor: On Demmand
GPU Max Frequency: 480
Voltages:
192 MHz = 775mv
384 MHz = 800mv
486 MHz = 800mv
594 MHz = 825mv
702 MHz = 850mv
810 MHz = 900mv
918 MHz = 950mv
1026 MHz = 1000mv
1134 MHz = 1025mv
1242 MHz = 1050mv
1350 MHz = 1075mv
1458 MHz = 1100mv
1512 MHz = 1125mv
Enjoy
Sent from my SGS III
Click to expand...
Click to collapse
liltitiz from his thread [KT747: Share & discuss your settings]+[govs & scheds info] using ktoonsez' KT747 kernel.
Post is here
liltitiz said:
With my new settings I can get up to 5-6 hour of screen on with a discharging time of around 24 hours. Before I start playing with cpu1, I couldn't get more than 4hours of screen on with a discharging time around 15hours since the Linux 3.4 kernel
Note that I also use greening to hibernate apps and Tasker to turn on things like gps, data, wifi, auto rotate only when I need them.
I readjusted my settings yesterday to test something out if you got no loss in performance yet you can try them out:
Ktoonservative setup to input in ktweaker:
Boost 2nd core on button:0
Boost cpu:540
Boost gpu: doesn't matter
Boost hold cycle :0
Boost turn on 2nd core:0
Cpu down block cycle:0
Down threshold:75
Down threshold hotplug:60
Freq step:3
Ignore nice load:0
No 2nd cpu screen off:1
Sampling down factor:3
Sampling rate: 25000
Sampling rate screen off: 45000
Up threshold:94
Up threshold hotplug:96
---------------------------------------------------
Command lines to apply my asswax settings on cpu1 :
echo asswax > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo 135000 > /sys/devices/system/cpu/cpufreq/asswax/awake_ideal_freq
echo 200 > /sys/devices/system/cpu/cpufreq/asswax/down_rate_us
echo 189000 > /sys/devices/system/cpu/cpufreq/asswax/interactive_ideal_freq
echo 95 > /sys/devices/system/cpu/cpufreq/asswax/max_cpu_load
echo 65 > /sys/devices/system/cpu/cpufreq/asswax/min_cpu_load
echo 250000 > /sys/devices/system/cpu/cpufreq/asswax/ramp_down_step
echo 50000 > /sys/devices/system/cpu/cpufreq/asswax/ramp_up_step
echo 81000 > /sys/devices/system/cpu/cpufreq/asswax/sleep_ideal_freq
echo 135000 > /sys/devices/system/cpu/cpufreq/asswax/sleep_wakeup_freq
echo 5000 > /sys/devices/system/cpu/cpufreq/asswax/up_rate_us
---------------------------------------------------
If you set your ktoonservative to turn off 2nd core(cpu1) when screen is off, then it doesn't matter because your cpu1.will be off so only your ktoonservative(cpu0) settings matter. Personally I use 486 as my max freq when screen is off.
Click to expand...
Click to collapse
Before we begin on the below, I must continue something about kernels from above due to character limits in posts.
A word of advice from vikas.mishra via XDA RD dorimanx in this post:
This is long INFO post from real chip designer that help to create CPU/GPU and other chips for the living for 14 years now, so respect
He sent me PM, for now he cant post that by him self.
Vikas is monitoring our thread and want to say his professional stand about UV/OV and why it's works for some and why not for others.
==================
I am calling Vikas(vikas.mishra) to the speech stand
Hello people.
Let me introduce myself - my name is Vikas Mishra and I am a chip designer by profession. .
I have worked on critical parts of design of TI OMAP4, OMAP5, Nvidia Tegra 3 etc and have been doing this for the last 14 years.
Of late - I have seen a lot of folks posting BUGS about undervolting of the GPU/CPU.
I think I can explain what are the possible issues with undervolting/overclocking in a laymans language.
It is a little long winded but I think the length is needed for providing the appropriate context.
* What is inside your Cellphone
Your cellphone is an amazing device. It is a full fledged computer
that fits into your pocket. They have all the standard components
that a computer has - except that they are all usually soldered on
the motherboard directly and are not meant to be user-servicable.
The chief components inside your cellphone are
1. Application Processor (AP)- this is the heart of a modern
cellphone. These are manufactured by many companies - the main
ones are Qualcomm, Nvidia, Samsung and Apple. The other not so
well known ones are made by Texas Instruments, ST Ericsson,
Marvell and Broadcom.
A modern AP has logic to control the camera and process the image
that it generates, to do video encoding (video recording) and
video decoding (movie watching), Audio processor etc. in addition
to the well known CPU and GPU.
2. Power Management Controller - This is the chip that is
responsible for generating and regulating the voltages that are
used by all the components on the board.
3. DRAM - not very different from the DRAM found on a PC (except
that it is lower voltage)
4. Flash - for storage
5. Touchscreen controller
6. Logic for microphone, speaker
7. Battery
One of the most complex piece of circuitry on the phone is the AP
and the power management controller.
* Circuit Basics
A modern AP has millions of circuit units called (Flip
Flops). These flip flops have two parameters associated with them
called Setup time and Hold time. More details on what a flip flop
can be found on the wikipedia at
http://en.wikipedia.org/wiki/Flip-flop_(electronics) . This is a
nice bit of bedside reading if you are interested.
A setup time roughly indicates what frequency you can run a design
or an AP at before it becomes unstable.
A hold time roughly indicates the maximum voltage till which a
design is stable.
A fully technical analysis of what is involved in these timing
parameters requires a degree in electrical engineering but in broad
terms the problem is described below.
Chip designers diligently ensure that all of the millions of the
flip flops in a chip meet the setup and hold time across a broad
range of voltages and silicon parameters. They do a pessimistic
analysis to ensure that a chip will run reliably across a wide
range of voltage/frequency combinations.
However, contrary to the popular belief, chips vary widely in their
silicon parameters. Even chips on a the same wafer and different
flip-flops within the same chip can have widely different silicon
parameters. This is why what works on one particular chip will not
work on the other chip.
Your silicon manufacturer provides a range of voltages and
frequencies across which the device can work reliably. The phone
manufacturer will further narrow down the range depending on the
other components they choose within the phone board.
* How does voltage affect the design
Reducing voltage makes the design slower and increasing voltage
makes the design faster.
So can I keep on increasing the voltage for ever and make the
circuit faster and faster. The answer is no - a point will come when
the circuit will become unreliable. This becomes unreliable because
the "hold time" of one or more of the flops will start
violating.
As you reduce the voltage of the design, the circuit will start
becoming slower. However typically it will continue to work till at
apoint it starts failing - this failure occurs due to violation of
"setup time" of one or more flops in the design.
So what happens when the setup time or the hold time of a design
fails - the answer is that it is unpredictable. Meaning suddenly if
you ask the processor what is the value of 2+2, the answer it will
provide could be unreliable - in some cases it could be 3, in some
cases it could be 4 in some cases it could be -2349783297 (a random number).
I am of course oversimplifying but I hope you get the picture.
* How does undervolting affect your phone processor
The reason undervolting is so appealing to people because they
thing that undervolting will save power and improve battery
life. While this is true in theory, in practice there is a caveat.
It will reduce the power of the chip, but the power consumed by the
phone as a whole will not improve. In some cases in fact it can
deteriorate. Let me explain.
The most power hungry part in the phone is not the AP - it is the
LCD screen. All of these screens consume a ton of power. So even
though your AP is now consuming lesser power, the overall impact to
the phone as a whole is not that much.
If you accompany undervolting with a frequency reduction (which you
should), the total time taken for doing a web page rendering (for
example) would increase. During this time the screen is on and it
has more than compensated for the power that you saved in the
AP.
You could of course come up with examples where this wouldn't
happen - but on a whole, IMHO, you should leave the voltage of the
AP/GPU/CPU to the guys who know the system best - the guys who
designed the chip and people who manufactured it.
* How does overvolting/overclocking affect your phone processor
If you want that last drop of performance from your phone and you
over clock it, at a point some of the design flops will start
violating the hold time and the design will stop working reliably.
Again, in some anecdotal cases this would work - but this is not a
reliable means/mode of working. Just because your friend's or your
first cousin's girlfriend's phone works - doesn't mean yours will
work as well.
* What are the user observable impacts of undervolting/overclocking?
It is hard to say - simply because there are so many of flops in
the design.
In some cases - you wouldn't see anything wrong with the phone
until one day you do. In some cases it will result in a SOD
immediately. In some cases it will result in your phone not waking
up reliably.
IMHO the risks of issues with undervolting/overclocking far
outweighthe potential gains you may get out of it. Usually there
is no lasting damage to the phone/AP if you overlock/undervolt but
it is possible to do it. For example, You run the phone at such a
high frequency that the chip temperature becomes more than what it
was designed for and the Silicon just fails.
So "Just say No" . Don't overclock or undervolt your phone -
leave it to the guys who really understand what they are doing.
Thanks,
Vikas
Click to expand...
Click to collapse
^*v*^*v*^*v*^*v*^*v*^*v*^*v*^*v*^*v*^
Memory Management
Did you know that you can also free up some internal memory space by just basic maintenance? You can install a Cache Cleaner from the market. I use Cache Cleaner NG (root) and CacheMate (root) which will clear your cache for you, Cache Cleaner NG will even clear your cache on your SDcard. Open Root Explorer and if you see a bunch of free floating cache files, those need to go. Wasted space. Small in the scheme of your SDcard, but still wasted.
So here we go (best part is at the bottom though):
Ok so you go into XDA on your phone, go to the themes page and look at what and how people are theming their phones or see some pix of someone's SetCPU profiles. All those develop a cache that takes up space on your phone. Now lets say that you go to the market and look through some apps or update your apps (more on this later). This also generates cache, usually up to 2-4mb. Ever try to download something from the market and it says something like "not enough space". This not needed cache may be some of the reason.
Here are some tricks and apps that some of you may know and also some tricks that I have found that I am sure most don't know about.
SOME GOOD LOW MEMORY APPS:
Cache Cleaner NG and Cache Mate (both root and free-Cache Mate has a paid but the free one works just fine.)
Diskusage (free) ~ This one will show you a graphical version of your /data/apps and also you SD card to show you exactly what is taking up so much space. You can click on that item and hit "Show" and it will take you to the app's page in Manager Applications. It also has a root function too that will allow you to see what is in /system, /cache, /data,…
Some sort of file manager to get to some things I'll mention below. (I use Root Explorer)
SOME MEMORY CLEARING TIPS AND TRICKS:
Home Launcher ~ If you have a 3rd party home launcher, see if it has the ability to long-press an icon to take you to its screen in the Manage Apps section. I use APEX and if you long-press on say Market, it takes me to the same place as is I were to go to Settings->Applications->Manage Apps->Market. Instead of all that, just long-press on the icon and BAM! it takes you there. Here you can clear out your cache for the market or delete the data (if you need to do that). Or clear the cache of the XDA app b/c you looked at too many pix.
Browsers ~ These develop cache that takes up memory and space, especially the stock browser. If you use a 3rd party, you can get the settings to clear cache, cookies, passwords,…on exit. I use Dolphin, but I am pretty sure that most have something like this on them. (side note: most 3rd party browsers once exited will not run in the background unlike the stock one)
Media ~ So you download a bunch of mp3's from the net or click on some pix and save it to your SD card. Or maybe you just felt like wiping your card and having a fresh start. Every time you reboot, you phone will scan media. No big deal, but the more you criss-cross things from PC to phone and back again, it can create a bunch of double files in your media cache on the phone. With the proper placement of .nomedia files (this prevents your media scanner from doing just that, scanning media- i.e. pix, jpegs,…Don’t place a .nomedia in your music, album art or DCIM files**bad).
Every once in a while, I'll hit the Diskusage or go to Manage apps and clear the media cache. Then I got to my file manager and the DCIM->Thumbs and delete the .Thumbnails files (should be 2). Unmount the SD card and remount to start the media scan, pull up the Gallery and wait for the thumbs to come back (depending on how many you have, this could take awhile). By doing this you can get almost 5 mb back if you have a bunch of double scans in your media folder.
AND NOW FOR SOME TIPS THAT MOST COULD NOT KNOW:
LOSTDIR - Lets say that you have your phone plugged into your PC and for some reason you, in a fit of rage, jerk the plug out without unmounting it first. This creates a file that is put into your LOST DIR folder on your SD card. Anytime you don't safely unmount the SD card, it will create a file in that folder. In the scheme of the SD card, it isn't too much, but I don't like having useless items free floating about.
Here is a good explanation of what the Lost.dir is for, seems legit, I buy it.
TOMBSTONES - So you are downloading an update from the market and for some reason your phone freezes and the Force Close-Retry-Wait doesn't work out for you. You have to do a battery pull. Frustrating I know and the memory takes a hit too. Every time you have to do a battery pull because of a freeze up or something of the like, it creates a TOMBSTONE file in /data. These are useless and can be deleted. If you are flashing ROMs and are constantly having to do battery pulls b/c market crashes or an app freezes, then you are creating a Tombstone file.
**Here is where your file manager (with root) will help. Go into /data and scroll all the way to the bottom and open /tombstone. There should be some files in there and depending on how many there are, I could be a nice chunk of wasted memory. Just select all and delete. They are not needed. Your internal memory should go up by doing this.
LOST & FOUND - Same scenario, but now go into /data/ cache or /cache and you'll see Dalvik-Cache (don’t mess with this), Lost & Found and Recovery. If you tried to download an app and it got frozen for some reason and had to do a battery pull, the apk will be free floating in there, uninstalled (free floating radical). You can delete this. While it isn't in the Dalvik-Cache folder, it is taking up space. Once you are able to download something completely and correctly from the market, it will populate into Dalvik-Cache correctly and won't be a free radical, as I like to say.
Useful Apps
These are some apps that will help you get the most of your battery life. I will put a brief descpition of them and you can also click on their names to take you directly to their market link. Note that some of these are ROOT apps and almost all of them also have PAID versions that greatly expand their functionality. Use the free ones and see how you like them and then kick in for the PAID ones if you want. The only one that I really suggest paying for right out of the gate to get the most out of your battery is Juice Defender Plus.
Tasker –
Paid app from the Market. This app is highly technical and not for noobs. Use at your own risk.
I would love for some of you out there to give me your Tasker Battery Saving Profiles. Either put them in the thread here or PM to me directly.
Here is a thread about how it works by brandall:
[TUT] The Ultimate Noob/Beginners Guide to Tasker
Greenify –
XDA Thread is here: READ IT (at the very least, read the OP)
This app is probably one of the best battery saving apps that has come out in quite a long time. It allows you to "Hibernate" apps that are not being used at the time, get them out of the foreground and prevents them from running when not in use, thus eating battery.
It is really easy to use. All you have to do is fire it up, grant Root and then select the apps that you want to "Hibernate". (Note: be very careful what types of apps that you do this with, i.e. /system/apps, as it could cause adverse effects like missed notifications, missed SMS/MMS, misbehaving apps,...you get my point I hope).
Batstat Widget –
I know, I know. Above I said that widgets were nothing more that monitoring apps on your home page, but this one works great, has low memory and is very, very simple. It shows Charge in %, Volts to know when you are FULLY charged and Temperature F/C to tell you that your phone is getting hot and exactly how hot it is.
BetterBatteryStats –
This app will show you what exactly is eating at your battery. Processes, Running Services, Wakelocks, Partial Wakelocks. It is a PAID app but for XDA users it is free. See here for more extensive details, instructions, screenies, change-logs,... and credits go to Chamonix and his development team for this app.
JuiceDefender (Plus) [Since I use JD+, that is what I am going to refer too.]
–
This app’s ability to kill Radio/Data has NO EFFECT on phone calls or messaging. You will still get that call in the middle of the night you were expecting.
If you set it to custom, the go into the settings tab on the right and then all the way at the bottom, there is two buttons to push, The first in Interactive which will pull up Juice Defender for up for any app that isn't already configured and the other is Configure Apps. This is the one that you can customize on an app-to-app basis where if you are no using an app and the screen is locked, it kills the radio/data traffic for that app.
Say you are listening to IHeartRadio, this you would want either Enable or Enable/off (which means the screen will be locked but the radio/data will be working). Now take the browser. If you are not using the browser, then you don't need it transmitting data right? So you would set that one to Enable (which means that it will only enable data traffic when that app is being used).
Juice Defender only works when the screen is locked (WidgetLocker lock screens interfere with JuiceDefender), don't forget and all widgets are battery drains b/c all they really are is a monitoring app and if it is tied to something like Facebook or Google+, then that data will be running constantly.
Settings:
Enable = Radio/data on when app is in use (front)
Enable/off = Radio/data on for background apps (when screen is locked)
Disable = Disables radio/data traffic completely when that app is running
Do Nothing = What is says
Examples:
Angry Birds = Disable (Here is a little known trick that I use for this and any game with Ads. With this and something like Adfree, no more ads in Angry Birds even though the ads are embedded in the .apk)
Pandora/Jango/ Tune-in = Enable/Off (this will keep your battery temp down when streaming)
Browser/ Market = Enable (not enable/off b/c then it will keep your radio/data open)
Beautiful Widgets = Enable/off
mClock/Clockr = Enable/off
SMS/MMS = Enable or Do Nothing (why would you push disable)
I have been using JD+ for over a year on 3 different phones and multiple ROMs and have noticed a considerable difference in battery life. Just takes some time to figure out YOUR settings and what YOU like. I have also used it on Stock kernel and had no problems either.
Here are my personal setting but I am on JD+ and not Ultimate
Profile - Customize
Notification - Graphical
Settings
Mobile Data and WIFI both Enable
Options - Auto Disable
Location - Disable
Schedule -Enable --->2hrs
Night Enable --->12a to 9a (user take priority)
Apps --.Set to Interactive
E = Enable
ESo = Enable/Scrren Off
D = Disable
DN = Do Nothing
At-Bat12 = ESo
IHeartRadio = ESo
Jango = ESo
Sticher = ESo
Dolphin = E
Google Play Store = E
Messaging = E
Twitter = E
XDA pre = E
Zedge = E
Angry Birds (all variants) = Disable --->You get no ads this way wink wink
These are all Do Nothing
Addfree
Apparatus
BW
Betterbatterystats
Cachemate
Elixir
Fasterfix
FlickGolf
Google Search
Maps
Moboplayer
PowerAmp -->I can listen to music without it looking for Album Art b/c it is set to do nothing, so one of the above apps take priority and when the screen is off, data is off when I am listening to music
Quadrant
Blah, blah, blah you get the idea.
If you have every app you own and in the phone set to do "something", then you are going to run into priority issues when multi-tasking which will kill your battery for 1 b/c it is opening and closing radios and 2 for the RAM it is taking to figure out which priority take the lead. Hence why I have so many set to Do Nothing.
LBE Privacy Guard –
There may or may not be some issues with this app and Jelly Bean, so make sure you read the Market Comments and hit their website to make sure. Thanks to mypenismighty for the tip.
This will go good with JuiceDefender, as they both prevent unwanted data transfer. Protect your privacy by controlling the permission of each application to access your sensitive data. Block malicious operation from Mal-wares and Trojans. Block unwanted network traffic if you don’t have a unlimited data plan. Find out which application is trying to steal your privacy by checking the security log.
RAM Munchers eat battery too. These will fix that for you.
Autostarts (paid-CAUTION this is for advanced users) –
Keep control over your phone: See what applications do behind your back.
Shows you what apps run on phone startup, and what other events trigger in the background. Root users can disable unwanted autostarts and speed up their phone boot.
Watchdog –
See what is eating your RAM. Hint: if it is using RAM,then probably it is also using battery too.
Spare Parts –
Spare Parts allows you to enable some settings
that are not found in the default setting menu
Process Monitor –
List the running process on your Android device.
Long click item to kill application or open application.
Fastboot –
This is a handy little app that kills all your services at once and lets them restart back up. I use this right before I hit the lock screen, so that if any app-services are running that I don’t have configured in Juice Defender Plus they will be killed, frees up about 50-70mb of memory, and then I lock the screen and JD takes over. This one is optional if you want it or not. I like it just fine and it works for me.
Matte Screen Filter –
Puts a sort of Dim setting on your screen. Almost like a display overlay, ok? And I did mean to rhyme those. I don’t use it because I have my display set how I want it but you can.
Battery Calibrator –
Pointless, but if you want to check out more info, click the hide tag below.
If you are having some haywire battery readings, this is for you. THIS WILL NOT INCREASE YOUR BATTERY LIFE, but will give you a truer reading if your battstats somehow get corrupted.
When you flash a new ROM, it is always best to wipe the old battery stats associated with that ROM, so you can start fresh as a daisy. How this works is you plug you phone in and charge to 100%, do not mess with it or surf the net (I do this overnight). While still plugged in, hit the apps, grant SU permission and hit the Calibrate Battery button. Grant SU permission again and once done, unplug your phone. Your Batterystats.bin has been deleted. You running your phone down by just using it normally. Most say to run it until it shuts off, but I have had bad experiences doing this, so I let it get to 10-15% and plug it in then. Charge fully up to 100% (again no surfing or games) and you will notice a dramatic increase in battery life.
**Note that this can be done two other ways. You can boot into CWR or Custom Recovery and go to Advanced Settings and there will be the Wipe Batterystats.bin option. Or you can do it manually by going into /data/system/ and deleting the batterystats.bin in there. Any of the three methods work to get the entirely same result in the end. I just like using the app or manually myself. **
Why battery calibration is important and what it is doing.
The app and what it does is more for when you are flashing a ROM and have around 60% and then once booted up fully, you charge it up to 100%. Decided you don't like your ROM and go back to your original ROM via backup, it will show 60% instead of the 100 or 90% you had before you went back to back up b/c you backed up the batstat bin when you nandroided your original ROM. Also simply charing your phone up to 100% and shortly after you unplug it, the Battstats will reset.
Recently (about this time last year) there has been information debunking this process. I will post it below. Here is the post by Dianne Hackborn, a Google Dev on her G+ account.
Dianne Hackborn - Jan 12, 2012 - Public
Today's myth debunking:
"The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory."
No, it does not.
This file is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings.
That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your more device more fantastic and wonderful... well, unless you have some deep hatred for seeing anything shown in the battery usage UI. And anyway, it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point), so this would be a much easier way to make it go away.
Click to expand...
Click to collapse
Here is a post from this thread with ERD Entropy512 and I discussing the Battery Calibration app.
Proof that these things work. Stock battery by the way. Sorry for the huge pix. I'll tag them with a Hide Parse for better viewing real estate.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Battery screenshots as of 12/13/12
View attachment 1561698View attachment 1561700View attachment 1561701
Change Log:
9 August 13 -Added in Greenify, Tasker, Kernel settings, cleaned up a bit.
13 December 12 - Added more battery screenies
2 November 12 - Initial Post
***********
If anyone has any tips or tricks that they want to share, by all means post them in here and I will link it in the OP. We are all in this together.
After reading this posts I am afraid to even use my phone cuz battery will drain lol jkjk! Thanks great thread!
Awesome thread man! Really glad to see you brought it over here!
Thanks for taking the time! I know it'll come in very handy for just about everyone.
Great job on a great guide!
:thumbup::thumbup:
Sent from my SGH-T999 using xda app-developers app
Woodrube said:
Y U Quote the whole OP
Click to expand...
Click to collapse
Awesome guide.. We thank you
Sent from my SGH-T999 using xda premium
This is some really great information. Thank you for taking the time to share it with everybody.
I knew it wouldn't take long for this to get to the top!
:thumbup:
Sent from my SGH-T999 using xda app-developers app
Great thread thank you
Sent from my SGH-T999 using xda app-developers app
I wanted to warn people that LBE Privacy Guard caused crazy boot loops for me. The reviews from the Play Store suggests that it's a Jellybean issue. Anyway, I was able to go into recovery, fix permissions, and force stop and uninstall before it went crazy again. Other than that, thanks for the great tips!
Woodrube good post, I remember seeing this in the vibrant section. Keep up the good work mod.
Sent from my SGH-T999 using Tapatalk 2
Thanks man. I ported the meat and bones of it over, but I added a ton of stuff specific to the SGS3, plus the sections about Governors and I/O schedulers.
If anyone reads this, I could use more OC/UV examples to put in the OP. It would be much appreciated.
This is great, what really got me is how the phone doesnt automatically go to the best tower for the best signal, so I will defnitely start toggling airplane mode when I travel, thanks a lot for all this helpful information and apps that can help up save battery as much as possible!
Be sure to turn off Latitude updates in
Maps > Menu > Settings > Location settings > Location reporting > Do not update your location
Already on the portal.
Great Great Great!
Thanks a lot.
Plus Post for anyone.....we seem to forget the things that kill us....back stab us the most when it comes to Battery Life!!
GOOD POST!!! VERY DETAILED AND INFORMANT!!!!
Great advice on the whole, but I don't agree with the stuff about app widgets.
Widgets don't use a bunch of resources just because they are widgets - I think you could almost say the opposite: the design of widgets allows them to be visible on your desktop without using any resources because the app code that controls the widget only needs to be loaded when the widget changes.
In the end, the resources used by an app widget depend on what it does and how it is designed - same as for any app. If your widget is supposed to go to the network and update some info for you every few minutes then this will drain your battery. However, there are tons of utility widgets that do nothing (and are not in memory) unless they are pressed or one of the phone states they are listening to changes (e.g. a radio is turned on).
Of course, a badly designed app will hurt your battery regardless. Personally I think apps need to get away from creating a custom Application object since these get instantiated whenever the system creates the app's (or app widget's) process, even if it is just to update a widget.
Nice thread
Thxs for this nice thread Any ore would be appreciated.
I have learned a few things besides already being techy.
Nice to see whole lot of apps for android
Welcome to decimalman's kernel playground!
As the name suggests, dkp is a hodgepodge of features and tweaks that I wanted to play with. It should get excellent battery life without feeling sluggish. It doesn't come with its own tuner app, so pick your favorite. Personally, I like Trickster MOD and Kernel Adiutor, so I go out of my way to make things work in them. Most other apps should work, too.
Features:
Overclocking up to 2.1 GHz, but you'll need to increase your voltages to get there (if you can get there at all)
Underclocking down to 54 MHz, with stability improvements
Undervolting compatible with most apps
Fast charge without unplugging first
Glorious animations for the notification and softkey LEDs
Well-integrated erandom means you don't need CrossBreeder or Seeder (recent AOSP builds use ISAAC instead)
freelunch and tierservative governors for optimal battery life without sacrificing responsiveness
Automatic mpdecision and auto-hotplug are only enabled when needed
Adjustable minimum voltage for stability on finicky processors
Optimized UKSM to free up some extra memory
Code optimizations for size and speed
Compiler optimizations (-O3, LTO, and more) because faster is better
Donors: Thanks, everyone! Your generosity is much appreciated. :good:
drpenguino, 0xScott, vmancini3 (twice! :good, Ch4m3l30n, rompnit, Mystique, ryandubbz, techdog, ElwOOd_CbGp, ScOULaris, ZipAddict
Remember:
Nandroid!
last_kmsg and/or logcat or it didn't happen.
Other kernels have their own threads or forums. Discuss them there.
Image dumps (settings, battery life, whatever) belong inside [HIDE][/HIDE] (that's HIDE, if you're on the mobile app) tags.
Be silly. We're here to have fun.
Installation:
Reboot to recovery. I recommend that one recovery...you know, the one that flashes zips? I forget what it's called.
Flash dkp. Optionally, rename and flash dkp-vmin-XXX.zip (see below).
Reboot.
Undervolting:
Undervolting on dkp is more complex than other kernels. Some processors get unstable at lower voltages, so (like the stock kernel) dkp keeps the processor voltage above 1150 mV by default. I refer to this limit as the minimum voltage. In order to undervolt, you'll need to lower the minimum voltage: if you use Trickster MOD or Kernel Adiutor, just disable "Override Minimum Voltage", otherwise rename dkp-vmin-XXX.zip to e.g. dkp-vmin-600.zip (which would apply a 600 mV minimum voltage) and flash it. If this causes instability (crashes, audio/video glitches, etc.), try using dkp-vmin-XXX.zip to apply a higher minimum voltage (somewhere between 950 and 1050 mV seems to work well for most people).
Downloads:
MediaFire:
All Downloads
dkp-vmin-XXX.zip
Solidfiles (Make sure you have an adblocker!):
All Downloads
dkp-vmin-XXX.zip
Source: I'm always happy to see my code used, so cherry-pick away. I'll even put together feature patches if you ask nicely.
Bugs:
Let me know.
Stable changelog:
3/3/13: Initial release for d2spr. Didn't get around to making threads for other carriers.
4/8/13 (3.0):
FauxSound support
Strip more useless stuff
A few bonus optimizations
4/8/13 (3.4):
Port everything except erandom from 3.0
Enhance cpufreq for easier configuration
4/24/13 (3.4):
Bugfixes: better support for tuner apps, fixed potential SOD bugs, automatic mpdecision fixups, etc.
Lots of CM/CAF/Linux updates
Working AssWax governor
Trinity colors support
sio, zen I/O schedulers
erandom is back!
Built with a super-fancy Linaro GCC 4.8.1-dev compiler toolchain for maximum -O3 goodness
Probably lots more, but there's hundreds of commits to sort through...
5/29/13 (3.4):
Bugfixes: better overclocking support, better hwrng support, etc.
Updates: new CM updates, Linux 3.4.47, updated FauxSound driver, added invisiblek's new panel colors interface
Automatic auto-hotplug
New optimizations, including link-time optimization and an updated GNU+Linaro GCC 4.8.1-dev toolchain
6/14/13 (3.4):
Bugfixes: fix several critical bugs in the 5/29 release.
9/7/13 (3.4):
Fixes for OC, UV, auto-hotplug.
A few new optimizations.
Synced up with CM.
9/20/13 (TW):
Ported everything from AOSP to TW.
9/20/13 (4.3):
Merged 4.3 from CM into the existing 4.2 code.
Current experimental branches:
Nothing interesting at the moment.
Goodies:
dkp doesn't come with its own splash screen. However, the dkp installer (i.e. the install zip) is smarter than you think, and can apply a custom splash screen for you. Here's how:
Create a folder on your internal storage named "dkp"
Copy a PNG image into the directory, and rename it "splash.png". Alternatively, copy an RLE image (i.e. from a flashable custom splash screen zip) and rename it "splash.rle". Ideally, the image should be roughly 1280x720 to begin with, since it won't be resized.
The image will be used as your splash screen whenever you flash dkp. Reflash to apply initially.
mikedavis120 has put together a how-to video that covers tweaking dkp for optimal battery life. If you're new to dkp, take a look! He also put together a zipped collection of apps that will come in handy while tuning dkp. It also includes a flashable zip, "dkp-debug_v1.zip". After flashing it, running
Code:
su
dkp
from a terminal emulator will collect lots of useful debug information that will make it much easier for me to track down the issue you're having. :good: mikedavis120 recommends installing SuperSU (included in the zip) instead of what's included in you ROM.
sysfs:
It's possible to adjust all the settings available in dkp without using apps. Because they show up as files, settings can be adjusted with file managers, terminal emulators, adb and initscripts. Here's the most interesting files inside sysfs:
/sys/devices/platform/mipi_samsung_oled.513/lcd/panel/panel_colors (not available on newer AOSP builds): display tint (0 = very red, 2 = default, 4 = trinity colors)
/sys/class/misc/gammacontrol (only available on newer AOSP builds): various color controls. See this post for details on enabling Trinity colors on builds that use these controls.
/sys/devices/system/cpu/cpu<N>/cpufreq/UV_mV_table: voltage table
/sys/devices/system/cpu/cpu<N>/cpufreq/scaling_...: scaling_governor is the governor, scaling_min_freq and scaling_max_freq are the minimum and maximum frequencies, scaling_available_governors and scaling_available_frequencies show the available governors and frequencies
/sys/kernel/dkp/force_fast_charge: fast charge
/sys/kernel/dkp/link_core_settings: when linked (the default), frequency settings and some governors are automatically copied to the other core
/sys/kernel/dkp/vmin: minimum processor voltage in mV
/sys/kernel/mm/uksm/run: activate UKSM
auto-hotplug tuners:
These show up in the governor settings for any governor that doesn't do its own hotplugging. They only take effect when using auto-hotplug, so you'll probably need to disable mpdecision in Trickster.
hotplug_intpulse: when set to 1, automatically turns core 2 on whenever the screen/buttons/whatever is pressed. Default is 0.
hotplug_sampling_periods: number of samples to use for average number of running tasks. Default is 15.
hotplug_sampling_rate: number of 'jiffies' (currently 1 jiffy = 10 ms) between each sample of running tasks. Default is 20 (0.2 sec).
hotplug_enable_one_threshold: the average number of running tasks required to turn core 2 on, multiplied by 100. Default is 125 (1.25 tasks on average).
hotplug_disable_one_threshold: the average number of running tasks required to keep core 2 on, multiplied by 100. Default is 250 (2.5 tasks on average).
freelunch/nanolunch tuners:
freelunch and nanolunch aren't materially based on other governors, so their configuration is quite different than other governors. There's lots of tuners, since I haven't really decided on an ideal tuning. I encourage experimentation! I'll explain a bit of how these governors work before actually listing the tuners.
Generally speaking, there are two modes: in "normal" mode, sampling is done occasionally and frequency is generally increased slowly; in "interactive" mode, sampling is done much more quickly, and frequency increases much more quickly. "Interactive" mode ends after several samples of very low usage. The idea of a "hispeed" frequency is used in lots of governors, and it refers to the frequency that the CPU will jump to when more CPU usage is needed; generally, it's a generous estimate of how much CPU will be needed. Here, the hispeed frequency is adjusted on-the-fly, increasing when more CPU is needed and gradually decreasing when the CPU is idle. In "interactive" mode, the hispeed frequency is kept fairly high so that everything will feel snappy.
Hotplugging is taken care of in the least complicated (and in my opinion, most reasonable) way possible: if core 1 is using lots of CPU, and there are several tasks running (in other words, if it's likely that core 2 will have something to do), core 2 is turned on; if either core isn't doing much except using power, core 2 is turned off.
sampling_rate: the usual
hotplug_up_cycles: number of consecutive heavily-loaded samples before core 2 is turned on
hotplug_down_cycles: number of consecutive lightly-loaded samples before core 2 is turned off
hotplug_up_load: number of running tasks required to bring core 2 online
hotplug_up_usage: number of used CPU cycles (in thousands per second) required to bring core 2 online
hotplug_down_usage: number of used CPU cycles (in thousands per second) required on both cores to keep core 2 online
overestimate_khz: number of CPU cycles to overshoot usage by in "normal" mode
hispeed_thresh: if CPU usage is within this many cycles (in thousands per second) of the maximum frequency, frequency will be increased to the hispeed frequency. Generally, hispeed is pretty low in "normal" mode, and fairly high in "interactive" mode.
hispeed_decrease: when the CPU is sitting idle, the hispeed frequency is decreased by this amount each sample (this isn't ideal, but it works)
interaction_hispeed: the initial hispeed frequency when switching to "interactive" mode
interaction_return_cycles: number of consecutive lightly-loaded samples before returning to "normal" mode
interaction_return_usage: number of used CPU cycles (in thousands per second) required to stay in "interactive" mode
interaction_panic (nanolunch only): when set to 1, allows aggressively jumping past the current hispeed frequency under some circumstances
interaction_sampling_rate/overestimate_khz: equivalent to the "normal" versions of the tuners, these take effect in "interactive" mode
Just loaded it on pa 3.15
Sent from my SAMSUNG-SGH-I747 using xda premium
It doesn't say that it has morfic colors, but looks like it does. Gonna give it a whirl
Sent from my SGH-I747 using xda app-developers app
rmead01 said:
It doesn't say that it has morfic colors, but looks like it does. Gonna give it a whirl
Sent from my SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
It doesn't, but I'll merge it and put out a test build.
decimalman said:
It doesn't, but I'll merge it and put out a test build.
Click to expand...
Click to collapse
Is it possible they are left over from a previous kernel? Because I can def tell the difference usually and seems like it does.
Either way, advise when its updated. This governor seems solid so far.
Sent from my SGH-I747 using xda app-developers app
rmead01 said:
Is it possible they are left over from a previous kernel? Because I can def tell the difference usually and seems like it does.
Either way, advise when its updated. This governor seems solid so far.
Sent from my SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
dkp is based off clean CM source, so it shouldn't have been merged already.
I've got test builds compiling now, and the 3.4 builds will be up shortly. Flashing the trinity-colors test build and this zip will enable trinity colors. You can toggle it with
Code:
su
echo X >/sys/class/mdnie/mdnie/trinity_colors
where X is 0 to disable or 1 to enable.
Edit: and sorry for taking so long to respond.
Edit 2: 3.4 builds are up. http://d-h.st/7Ae
Thnx for this kernel
decimalman said:
dkp is based off clean CM source, so it shouldn't have been merged already.
I've got test builds compiling now, and the 3.4 builds will be up shortly. Flashing the trinity-colors test build and this zip will enable trinity colors. You can toggle it with
Code:
su
echo X >/sys/class/mdnie/mdnie/trinity_colors
where X is 0 to disable or 1 to enable.
Edit: and sorry for taking so long to respond.
Edit 2: 3.4 builds are up. http://d-h.st/7Ae
Click to expand...
Click to collapse
Maybe I was just seeing things, had just watched jurassic park in 3d.
New "test" build flashed as well as the file to enable it. Thanks for the addition. It's very hard to go back to normal once you've been smurfed depending on your display.
Only issue i'm having ATM is the ability to change the voltage table. My phone doesn't handle undervolting as well and i run a minimum of 950 baseline, if not 975. One of my normal apps wasn't able to set the voltage at all. I'm trying to use performance control which I don't like. It crashes trying to set the voltage on boot but at least I can go in and manually set the values on boot and they stick.
One last question, since this is your kernel, what scheduler do you recommend pairs well to freelunch? What would you use for performance and what would you use for batt?
rmead01 said:
One last question, since this is your kernel, what scheduler do you recommend pairs well to freelunch? What would you use for performance and what would you use for batt?
Click to expand...
Click to collapse
+1 on these questions
Sent from my AT&T Samsung Galaxy S III
rmead01 said:
Only issue i'm having ATM is the ability to change the voltage table. My phone doesn't handle undervolting as well and i run a minimum of 950 baseline, if not 975. One of my normal apps wasn't able to set the voltage at all. I'm trying to use performance control which I don't like. It crashes trying to set the voltage on boot but at least I can go in and manually set the values on boot and they stick.
Click to expand...
Click to collapse
Answered my own problem. I installed trickster as mentioned in OP and all voltage settings stick no problem with no issues.
rmead01 said:
New "test" build flashed as well as the file to enable it. Thanks for the addition. It's very hard to go back to normal once you've been smurfed depending on your display.
Only issue i'm having ATM is the ability to change the voltage table. My phone doesn't handle undervolting as well and i run a minimum of 950 baseline, if not 975. One of my normal apps wasn't able to set the voltage at all. I'm trying to use performance control which I don't like. It crashes trying to set the voltage on boot but at least I can go in and manually set the values on boot and they stick.
One last question, since this is your kernel, what scheduler do you recommend pairs well to freelunch? What would you use for performance and what would you use for batt?
Click to expand...
Click to collapse
Personally, I don't like trinity colors, but I definitely understand the appeal. I merged this into 3.0 and 3.4, so it'll be standard from here on. I'll add a link to the enabler zip in the OP as well.
What app would you normally use? I'll try to support it, since I already provide several voltage interfaces. I didn't realize performance control was crashing (I'm not a fan either, so I only lightly tested). I recently installed Trickster and liked it, so I've been going out of my way to support it. It's also really easy to write support for, so that's a bonus for me.
As for schedulers, I'm not fussy. I've never exhaustively tested performance and battery life, so I don't have a preference and usually run noop or deadline. However, I've had nothing but bad results with ROW (phone never deep sleeps, and I haven't looked into why).
decimalman said:
Personally, I don't like trinity colors, but I definitely understand the appeal. I merged this in, so it'll be standard from here on. I'll add a link to the enabler zip in the OP as well.
What app would you normally use? I'll try to support it, since I already provide several voltage interfaces. I didn't realize performance control was crashing (I'm not a fan either, so I only lightly tested). I recently installed Trickster and liked it, so I've been going out of my way to support it. It's also really easy to write support for, so that's a bonus for me.
As for schedulers, I'm not fussy. I've never exhaustively tested performance and battery life, so I don't have a preference and usually run noop or deadline. However, I've had nothing but bad results with ROW (phone never deep sleeps, and I haven't looked into why).
Click to expand...
Click to collapse
good to know. Trickster mod works fine and you mention it in the OP and it's at no cost in the play store. I wouldn't worry.
I was using an app called kernel tuner because some others would only set 1 core to the governor and not both. I checked that trickster does indeed set both cores to freelunch so once that figured out I removed kernel tuner. Kernel Tuner also has the options for profiles which can be toggled in tasker for varies states. freelunch so far hasn't needed any changing so not worried about it at this point. just as an example, some governors would be better for screen on/off and tasker could switch these to edge out battery life.
The voltage app i was using is simply called voltage control. Kernel tuner doesn't do a nice job of voltage changes. But since trickster does both governor and voltage adjustments well. i'm using that with no problems now.
Thanks for the morfic, having a way to toggle it works well for people. it's as simple as a script so there's that.
rmead01 said:
good to know. Trickster mod works fine and you mention it in the OP and it's at no cost in the play store. I wouldn't worry.
I was using an app called kernel tuner because some others would only set 1 core to the governor and not both. I checked that trickster does indeed set both cores to freelunch so once that was made it was no problem. Kernel Tuner also has the options for profiles which can be toggled in tasker for varies states. freelunch so far hasn't needed any changing so not worried about it at this point.
The voltage app i was using is simply called voltage control. Kernel tuner doesn't do a nice job of voltage changes. But since trickster does both well, i'm using that with no problems now.
Thanks for the morfic, having a way to toggle it works well for people. it's as simple as a script so there's that.
Click to expand...
Click to collapse
I meant to test Voltage Control but Google wasn't letting me download anything. It's a common app, so I'll try to get it working regardless. Kernel Tuner doesn't currently work well with freelunch, and tends to hang when it's trying to read settings in the CPU screen. Otherwise, it's a nice app. I didn't realize it had Tasker support (I use Llama).
I've added a few extra bits to the cpufreq core, so governors that need to be set on both cores (like freelunch) will automatically apply to both cores regardless of what app is used. cpufreq will even enable and disable mpdecision depending on whether a hotplugging governor is running (though Trickster won't show that it's disabled).
I owe ktoonsez for the toggleable trinity colors. I slightly rewrote his patch, but it's still largely his code. It's my policy that anything that not all users will want should be optional and easily configurable.
Edit: I think I've got Voltage Control fixed. I should be able to get Kernel Tuner working without too much work. I haven't even looked into Performance Control yet.
decimalman said:
I meant to test Voltage Control but Google wasn't letting me download anything. It's a common app, so I'll try to get it working regardless. Kernel Tuner doesn't currently work well with freelunch, and tends to hang when it's trying to read settings in the CPU screen. Otherwise, it's a nice app. I didn't realize it had Tasker support (I use Llama).
I've added a few extra bits to the cpufreq core, so governors that need to be set on both cores (like freelunch) will automatically apply to both cores regardless of what app is used. cpufreq will even enable and disable mpdecision depending on whether a hotplugging governor is running (though Trickster won't show that it's disabled).
I owe ktoonsez for the toggleable trinity colors. I slightly rewrote his patch, but it's still largely his code. It's my policy that anything that not all users will want should be optional and easily configurable.
Click to expand...
Click to collapse
well good job so far. batt life has been top notch. minimal drain in use and my over night idle drain was only a few %. I have things setup to disable wifi when sleep and also turn off mobile data when wifi is connected. A bit over the top but every bit helps.
:good::highfive:
I know I've been grilling you today but...
Kind of curious what the new tunables do. I haven't touched anything since it's working so well but there is always that part of me that wonders what adjust parameters will do. Is there any kind of reference for this governor that could indicate that type of info?
Does your kernel support faux sound app?
stevehkim said:
Does your kernel support faux sound app?
Click to expand...
Click to collapse
Yes. 3.0 and 3.4 both have support.
As for tuneables, I've been meaning to post a writeup but haven't gotten around to it. You're not the first to ask about it.
Sent from my SPH-L710 using xda app-developers app
This is a fantastic Kernel! The battery life has been outstanding so far. Thank you for your amazing work!
So here it is. I have had the note II since a couple weeks after its release for T-Mobile USA and have loved it since, like most of you I am sure. With that being said, what is the fun of having an android phone without changing some things to make it better?! This is a kernel based off of the Jellybean kernel source straight from Samsung themselves. I finally hit a point I felt worthy of release in this kernel so am doing just that. With that being said it is a long way from where I am sure it will be in the end. I benchmarked it against the stock kernel and MB4 with much higher scores so am pleased with that along with the battery life I am experiencing with it. Hope you all enjoy it and don't be shy to post anything you would like to see added or changed in future releases of this kernel. Thank you all.
I highly recommend doing a full CWM backup of everything as if you were flashing a ROM as this will back up everything including the previous kernel being used prior to flashing this.
The Note II packs its modules with the kernel now including the very important wifi module needed to use wifi so as of now it's looking like I will have to upload multiple zips for each ROM. Just post which ROMs you are using so I can get an idea what boot.img's you guys need exactly so I can post the corresponding flashable zip. If anyone knows of a better method of doing this feel free to let me know.
Prerequisites:
- Root
- CWM Recovery
There are a few steps to flashing this like any other Android Software:
1. Download the zip that matches the version/ROM you are using
2. Place zip on the root of either your internal or external
3. Enter Recovery and perform a CWM backup (optional but highly recommended)
4. Select "flash zip" in recovery and select the zip you downloaded and placed on your sdcard
5. Reboot
Downloads Section
Mod edit: Download links and other information removed
Changelog
Kernel #3
- CRT TV OFF support
- Charge Control System implemented *thanks to Andrei for his code*
- Charge Control enabled (Fast USB Charge)
- Crude fast USB charge disabled
- Sysfs helper file added for c control
- Faster device boot time
- Sensorhub write for every boot disabled *thanks to Andrei*
- Dynamic FSync Control System implemented and enabled *thanks to Andrei for this code*
- Increased VOODOO Headset frequency
- BFQ Scheduler set to default scheduler
- Updated ck BFS kernel optimizations for speed
- BFS modifications to kernel elements still in effect
- BFS CPU Scheduler disabled for now
- CFS CPU Scheduler enabled now
Kernel #2
- Added BFS CPU scheduler! *Written by Con Kolivas thank you buddy*
- BFS 406 currently in use
- BFS patch backported manually applied successfully (no code left out)
- Read about BFS in the post below
- VOODOO enhanced sound engine added *committed by ptmr*
- VOODOO enhanced sound engine enabled
- 16GB eMMC SDS (sudden death syndrome) patch applied *thanks to samsung*
- 16GB brick fix applied
- Exynos Memory security hole fixed *thanks to andreilux for the patch*
- Faster USB charge enabled
- Added NEW BFQ v6r1 I/O Scheduler *haven't seen anyone else using r1 supposed to benchmark higher than v6*
- Added Early Queue Merge code to BFQ I/O Scheduler
- I/O context updated for BFQ
- Added ROW I/O Scheduler
- Added SIO I/O Scheduler
- Added VR I/O Scheduler
- Added ZEN I/O Scheduler
- Deadline Scheduler optimized for flash devices (our devices)
- More Deadline Scheduler optimizations
- Added Triangle Away support *thanks chainfire*
- NTFS filesystem support
- NTFS read+WRITE enabled
- CPU hyperthreading enabled
Kernel #1
- EXT partitions using relatime
- EXT support compiled into kernel, not as a module
- EXT 1/2/3 support
- EXT 4 support with backwards compatibility
- EXT 4 used for EXT 2/3 filesystems
- Added Interactive governor
- Added Conservative governor
- Overclockable up to 1.9Ghz *thanks Glewarne*
- Support for controllable voltage interface for CPU
- Reduced CPU frequency transition for snappy response time from CPU
- Optimized GPU for higher performance and longer battery life
- Added low frequencies for GPU to save battery when not doing gfx intense tasks
- Added Overclocked frequencies for GPU *thanks to Glewarne for added freqs and tables*
- Undervolted GPU to save battery life at all times
- Increased memory allocation for GPU
- Removed Mali GPU state tracking
- Reduced Mali GPU utilization calculation timeout
- Added optimized ARM RWSEM algorithm
- Enabled Swap capability
- Compiled with emu optimizations
- Extra RAM being fed to GPU
- VPN support included as module
- Included every module stock kernel does plus some extras
- Other changes made I will remember to add here
Kernel #1 Benchmark (Stock T-Mobile MB4 ROM)
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+BFS - The Brain **** Scheduler by Con Kolivas.
+
+Goals.
+
+The goal of the Brain **** Scheduler, referred to as BFS from here on, is to
+completely do away with the complex designs of the past for the cpu process
+scheduler and instead implement one that is very simple in basic design.
+The main focus of BFS is to achieve excellent desktop interactivity and
+responsiveness without heuristics and tuning knobs that are difficult to
+understand, impossible to model and predict the effect of, and when tuned to
+one workload cause massive detriment to another.
+
+
+Design summary.
+
+BFS is best described as a single runqueue, O lookup, earliest effective
+virtual deadline first design, loosely based on EEVDF (earliest eligible virtual
+deadline first) and my previous Staircase Deadline scheduler. Each component
+shall be described in order to understand the significance of, and reasoning for
+it. The codebase when the first stable version was released was approximately
+9000 lines less code than the existing mainline linux kernel scheduler (in
+2.6.31). This does not even take into account the removal of documentation and
+the cgroups code that is not used.
+
+Design reasoning.
+
+The single runqueue refers to the queued but not running processes for the
+entire system, regardless of the number of CPUs. The reason for going back to
+a single runqueue design is that once multiple runqueues are introduced,
+per-CPU or otherwise, there will be complex interactions as each runqueue will
+be responsible for the scheduling latency and fairness of the tasks only on its
+own runqueue, and to achieve fairness and low latency across multiple CPUs, any
+advantage in throughput of having CPU local tasks causes other disadvantages.
+This is due to requiring a very complex balancing system to at best achieve some
+semblance of fairness across CPUs and can only maintain relatively low latency
+for tasks bound to the same CPUs, not across them. To increase said fairness
+and latency across CPUs, the advantage of local runqueue locking, which makes
+for better scalability, is lost due to having to grab multiple locks.
+
+A significant feature of BFS is that all accounting is done purely based on CPU
+used and nowhere is sleep time used in any way to determine entitlement or
+interactivity. Interactivity "estimators" that use some kind of sleep/run
+algorithm are doomed to fail to detect all interactive tasks, and to falsely tag
+tasks that aren't interactive as being so. The reason for this is that it is
+close to impossible to determine that when a task is sleeping, whether it is
+doing it voluntarily, as in a userspace application waiting for input in the
+form of a mouse click or otherwise, or involuntarily, because it is waiting for
+another thread, process, I/O, kernel activity or whatever. Thus, such an
+estimator will introduce corner cases, and more heuristics will be required to
+cope with those corner cases, introducing more corner cases and failed
+interactivity detection and so on. Interactivity in BFS is built into the design
+by virtue of the fact that tasks that are waking up have not used up their quota
+of CPU time, and have earlier effective deadlines, thereby making it very likely
+they will preempt any CPU bound task of equivalent nice level. See below for
+more information on the virtual deadline mechanism. Even if they do not preempt
+a running task, because the rr interval is guaranteed to have a bound upper
+limit on how long a task will wait for, it will be scheduled within a timeframe
+that will not cause visible interface jitter.
+
+
+Design details.
+
+Task insertion.
+
+BFS inserts tasks into each relevant queue as an O(1) insertion into a double
+linked list. On insertion, *every* running queue is checked to see if the newly
+queued task can run on any idle queue, or preempt the lowest running task on the
+system. This is how the cross-CPU scheduling of BFS achieves significantly lower
+latency per extra CPU the system has. In this case the lookup is, in the worst
+case scenario, O where n is the number of CPUs on the system.
+
+Data protection.
+
+BFS has one single lock protecting the process local data of every task in the
+global queue. Thus every insertion, removal and modification of task data in the
+global runqueue needs to grab the global lock. However, once a task is taken by
+a CPU, the CPU has its own local data copy of the running process' accounting
+information which only that CPU accesses and modifies (such as during a
+timer tick) thus allowing the accounting data to be updated lockless. Once a
+CPU has taken a task to run, it removes it from the global queue. Thus the
+global queue only ever has, at most,
+
+ (number of tasks requesting cpu time) - (number of logical CPUs) + 1
+
+tasks in the global queue. This value is relevant for the time taken to look up
+tasks during scheduling. This will increase if many tasks with CPU affinity set
+in their policy to limit which CPUs they're allowed to run on if they outnumber
+the number of CPUs. The +1 is because when rescheduling a task, the CPU's
+currently running task is put back on the queue. Lookup will be described after
+the virtual deadline mechanism is explained.
+
+Virtual deadline.
+
+The key to achieving low latency, scheduling fairness, and "nice level"
+distribution in BFS is entirely in the virtual deadline mechanism. The one
+tunable in BFS is the rr_interval, or "round robin interval". This is the
+maximum time two SCHED_OTHER (or SCHED_NORMAL, the common scheduling policy)
+tasks of the same nice level will be running for, or looking at it the other
+way around, the longest duration two tasks of the same nice level will be
+delayed for. When a task requests cpu time, it is given a quota (time_slice)
+equal to the rr_interval and a virtual deadline. The virtual deadline is
+offset from the current time in jiffies by this equation:
+
+ jiffies + (prio_ratio * rr_interval)
+
+The prio_ratio is determined as a ratio compared to the baseline of nice -20
+and increases by 10% per nice level. The deadline is a virtual one only in that
+no guarantee is placed that a task will actually be scheduled by this time, but
+it is used to compare which task should go next. There are three components to
+how a task is next chosen. First is time_slice expiration. If a task runs out
+of its time_slice, it is descheduled, the time_slice is refilled, and the
+deadline reset to that formula above. Second is sleep, where a task no longer
+is requesting CPU for whatever reason. The time_slice and deadline are _not_
+adjusted in this case and are just carried over for when the task is next
+scheduled. Third is preemption, and that is when a newly waking task is deemed
+higher priority than a currently running task on any cpu by virtue of the fact
+that it has an earlier virtual deadline than the currently running task. The
+earlier deadline is the key to which task is next chosen for the first and
+second cases. Once a task is descheduled, it is put back on the queue, and an
+O lookup of all queued-but-not-running tasks is done to determine which has
+the earliest deadline and that task is chosen to receive CPU next.
+
+The CPU proportion of different nice tasks works out to be approximately the
+
+ (prio_ratio difference)^2
+
+The reason it is squared is that a task's deadline does not change while it is
+running unless it runs out of time_slice. Thus, even if the time actually
+passes the deadline of another task that is queued, it will not get CPU time
+unless the current running task deschedules, and the time "base" (jiffies) is
+constantly moving.
+
+Task lookup.
+
+BFS has 103 priority queues. 100 of these are dedicated to the static priority
+of realtime tasks, and the remaining 3 are, in order of best to worst priority,
+SCHED_ISO (isochronous), SCHED_NORMAL, and SCHED_IDLEPRIO (idle priority
+scheduling). When a task of these priorities is queued, a bitmap of running
+priorities is set showing which of these priorities has tasks waiting for CPU
+time. When a CPU is made to reschedule, the lookup for the next task to get
+CPU time is performed in the following way:
+
+First the bitmap is checked to see what static priority tasks are queued. If
+any realtime priorities are found, the corresponding queue is checked and the
+first task listed there is taken (provided CPU affinity is suitable) and lookup
+is complete. If the priority corresponds to a SCHED_ISO task, they are also
+taken in FIFO order (as they behave like SCHED_RR). If the priority corresponds
+to either SCHED_NORMAL or SCHED_IDLEPRIO, then the lookup becomes O. At this
+stage, every task in the runlist that corresponds to that priority is checked
+to see which has the earliest set deadline, and (provided it has suitable CPU
+affinity) it is taken off the runqueue and given the CPU. If a task has an
+expired deadline, it is taken and the rest of the lookup aborted (as they are
+chosen in FIFO order).
+
+Thus, the lookup is O in the worst case only, where n is as described
+earlier, as tasks may be chosen before the whole task list is looked over.
+
+
+Scalability.
+
+The major limitations of BFS will be that of scalability, as the separate
+runqueue designs will have less lock contention as the number of CPUs rises.
+However they do not scale linearly even with separate runqueues as multiple
+runqueues will need to be locked concurrently on such designs to be able to
+achieve fair CPU balancing, to try and achieve some sort of nice-level fairness
+across CPUs, and to achieve low enough latency for tasks on a busy CPU when
+other CPUs would be more suited. BFS has the advantage that it requires no
+balancing algorithm whatsoever, as balancing occurs by proxy simply because
+all CPUs draw off the global runqueue, in priority and deadline order. Despite
+the fact that scalability is _not_ the prime concern of BFS, it both shows very
+good scalability to smaller numbers of CPUs and is likely a more scalable design
+at these numbers of CPUs.
+
+It also has some very low overhead scalability features built into the design
+when it has been deemed their overhead is so marginal that they're worth adding.
+The first is the local copy of the running process' data to the CPU it's running
+on to allow that data to be updated lockless where possible. Then there is
+deference paid to the last CPU a task was running on, by trying that CPU first
+when looking for an idle CPU to use the next time it's scheduled. Finally there
+is the notion of "sticky" tasks that are flagged when they are involuntarily
+descheduled, meaning they still want further CPU time. This sticky flag is
+used to bias heavily against those tasks being scheduled on a different CPU
+unless that CPU would be otherwise idle. When a cpu frequency governor is used
+that scales with CPU load, such as ondemand, sticky tasks are not scheduled
+on a different CPU at all, preferring instead to go idle. This means the CPU
+they were bound to is more likely to increase its speed while the other CPU
+will go idle, thus speeding up total task execution time and likely decreasing
+power usage. This is the only scenario where BFS will allow a CPU to go idle
+in preference to scheduling a task on the earliest available spare CPU.
+
+The real cost of migrating a task from one CPU to another is entirely dependant
+on the cache footprint of the task, how cache intensive the task is, how long
+it's been running on that CPU to take up the bulk of its cache, how big the CPU
+cache is, how fast and how layered the CPU cache is, how fast a context switch
+is... and so on. In other words, it's close to random in the real world where we
+do more than just one sole workload. The only thing we can be sure of is that
+it's not free. So BFS uses the principle that an idle CPU is a wasted CPU and
+utilising idle CPUs is more important than cache locality, and cache locality
+only plays a part after that.
+
+When choosing an idle CPU for a waking task, the cache locality is determined
+according to where the task last ran and then idle CPUs are ranked from best
+to worst to choose the most suitable idle CPU based on cache locality, NUMA
+node locality and hyperthread sibling business. They are chosen in the
+following preference (if idle):
+
+* Same core, idle or busy cache, idle threads
+* Other core, same cache, idle or busy cache, idle threads.
+* Same node, other CPU, idle cache, idle threads.
+* Same node, other CPU, busy cache, idle threads.
+* Same core, busy threads.
+* Other core, same cache, busy threads.
+* Same node, other CPU, busy threads.
+* Other node, other CPU, idle cache, idle threads.
+* Other node, other CPU, busy cache, idle threads.
+* Other node, other CPU, busy threads.
+
+This shows the SMT or "hyperthread" awareness in the design as well which will
+choose a real idle core first before a logical SMT sibling which already has
+tasks on the physical CPU.
+
+Early benchmarking of BFS suggested scalability dropped off at the 16 CPU mark.
+However this benchmarking was performed on an earlier design that was far less
+scalable than the current one so it's hard to know how scalable it is in terms
+of both CPUs (due to the global runqueue) and heavily loaded machines (due to
+O lookup) at this stage. Note that in terms of scalability, the number of
+_logical_ CPUs matters, not the number of _physical_ CPUs. Thus, a dual (2x)
+quad core (4X) hyperthreaded (2X) machine is effectively a 16X. Newer benchmark
+results are very promising indeed, without needing to tweak any knobs, features
+or options. Benchmark contributions are most welcome.
+
+
+Features
+
+As the initial prime target audience for BFS was the average desktop user, it
+was designed to not need tweaking, tuning or have features set to obtain benefit
+from it. Thus the number of knobs and features has been kept to an absolute
+minimum and should not require extra user input for the vast majority of cases.
+There are precisely 2 tunables, and 2 extra scheduling policies. The rr_interval
+and iso_cpu tunables, and the SCHED_ISO and SCHED_IDLEPRIO policies. In addition
+to this, BFS also uses sub-tick accounting. What BFS does _not_ now feature is
+support for CGROUPS. The average user should neither need to know what these
+are, nor should they need to be using them to have good desktop behaviour.
+
+rr_interval
+
+There is only one "scheduler" tunable, the round robin interval. This can be
+accessed in
+
+ /proc/sys/kernel/rr_interval
+
+The value is in milliseconds, and the default value is set to 6ms. Valid values
+are from 1 to 1000. Decreasing the value will decrease latencies at the cost of
+decreasing throughput, while increasing it will improve throughput, but at the
+cost of worsening latencies. The accuracy of the rr interval is limited by HZ
+resolution of the kernel configuration. Thus, the worst case latencies are
+usually slightly higher than this actual value. BFS uses "dithering" to try and
+minimise the effect the Hz limitation has. The default value of 6 is not an
+arbitrary one. It is based on the fact that humans can detect jitter at
+approximately 7ms, so aiming for much lower latencies is pointless under most
+circumstances. It is worth noting this fact when comparing the latency
+performance of BFS to other schedulers. Worst case latencies being higher than
+7ms are far worse than average latencies not being in the microsecond range.
+Experimentation has shown that rr intervals being increased up to 300 can
+improve throughput but beyond that, scheduling noise from elsewhere prevents
+further demonstrable throughput.
+
+Isochronous scheduling.
+
+Isochronous scheduling is a unique scheduling policy designed to provide
+near-real-time performance to unprivileged (ie non-root) users without the
+ability to starve the machine indefinitely. Isochronous tasks (which means
+"same time") are set using, for example, the schedtool application like so:
+
+ schedtool -I -e amarok
+
+This will start the audio application "amarok" as SCHED_ISO. How SCHED_ISO works
+is that it has a priority level between true realtime tasks and SCHED_NORMAL
+which would allow them to preempt all normal tasks, in a SCHED_RR fashion (ie,
+if multiple SCHED_ISO tasks are running, they purely round robin at rr_interval
+rate). However if ISO tasks run for more than a tunable finite amount of time,
+they are then demoted back to SCHED_NORMAL scheduling. This finite amount of
+time is the percentage of _total CPU_ available across the machine, configurable
+as a percentage in the following "resource handling" tunable (as opposed to a
+scheduler tunable):
+
+ /proc/sys/kernel/iso_cpu
+
+and is set to 70% by default. It is calculated over a rolling 5 second average
+Because it is the total CPU available, it means that on a multi CPU machine, it
+is possible to have an ISO task running as realtime scheduling indefinitely on
+just one CPU, as the other CPUs will be available. Setting this to 100 is the
+equivalent of giving all users SCHED_RR access and setting it to 0 removes the
+ability to run any pseudo-realtime tasks.
+
+A feature of BFS is that it detects when an application tries to obtain a
+realtime policy (SCHED_RR or SCHED_FIFO) and the caller does not have the
+appropriate privileges to use those policies. When it detects this, it will
+give the task SCHED_ISO policy instead. Thus it is transparent to the user.
+Because some applications constantly set their policy as well as their nice
+level, there is potential for them to undo the override specified by the user
+on the command line of setting the policy to SCHED_ISO. To counter this, once
+a task has been set to SCHED_ISO policy, it needs superuser privileges to set
+it back to SCHED_NORMAL. This will ensure the task remains ISO and all child
+processes and threads will also inherit the ISO policy.
+
+Idleprio scheduling.
+
+Idleprio scheduling is a scheduling policy designed to give out CPU to a task
+_only_ when the CPU would be otherwise idle. The idea behind this is to allow
+ultra low priority tasks to be run in the background that have virtually no
+effect on the foreground tasks. This is ideally suited to distributed computing
+clients (like setiathome, folding, mprime etc) but can also be used to start
+a video encode or so on without any slowdown of other tasks. To avoid this
+policy from grabbing shared resources and holding them indefinitely, if it
+detects a state where the task is waiting on I/O, the machine is about to
+suspend to ram and so on, it will transiently schedule them as SCHED_NORMAL. As
+per the Isochronous task management, once a task has been scheduled as IDLEPRIO,
+it cannot be put back to SCHED_NORMAL without superuser privileges. Tasks can
+be set to start as SCHED_IDLEPRIO with the schedtool command like so:
+
+ schedtool -D -e ./mprime
+
+Subtick accounting.
+
+It is surprisingly difficult to get accurate CPU accounting, and in many cases,
+the accounting is done by simply determining what is happening at the precise
+moment a timer tick fires off. This becomes increasingly inaccurate as the
+timer tick frequency (HZ) is lowered. It is possible to create an application
+which uses almost 100% CPU, yet by being descheduled at the right time, records
+zero CPU usage. While the main problem with this is that there are possible
+security implications, it is also difficult to determine how much CPU a task
+really does use. BFS tries to use the sub-tick accounting from the TSC clock,
+where possible, to determine real CPU usage. This is not entirely reliable, but
+is far more likely to produce accurate CPU usage data than the existing designs
+and will not show tasks as consuming no CPU usage when they actually are. Thus,
+the amount of CPU reported as being used by BFS will more accurately represent
+how much CPU the task itself is using (as is shown for example by the 'time'
+application), so the reported values may be quite different to other schedulers.
+Values reported as the 'load' are more prone to problems with this design, but
+per process values are closer to real usage. When comparing throughput of BFS
+to other designs, it is important to compare the actual completed work in terms
+of total wall clock time taken and total work done, rather than the reported
+"cpu usage".
Thanks I'll flash and report back. Running tweaked 2.0
Push push
Sent from my SGH-T889 using xda app-developers app
Thank you for your work
Sent from my SGH-T889 using xda premium
Which zip do we install?
does your kernel support voodoo app?
edit: No voodoo support (I have to have voodoo support)
you should also add that your kernel changes boot screen/image
fast charging over USB?
CPU voltage edit, underclock?
I saw a whole bunch of GPU "editables" I think was cool.
If you are running jellybean flash the top download in the download section. Don't forget to make a backup first
Sent from my SGH-T889 using xda app-developers app
will the King also be releasing a ROM?
We'll see but I gotta say google has done such a great job with MB4 at this time I don't see the need.
With that being said I'm going to continue work on this kernel and I'm pleased with the benchmark improvements im seeing compared to stock
Sent from my SGH-T889 using xda app-developers app
I flashed it but wasnt recognizing my exfat 64 gb sd.Going back to stock kernel
Sent from my SGH-T889 using xda premium
Thank you I will definately look into this
Have been listening to your inputs and have some nice additions for kernel #2
Sent from my SGH-T889 using xda app-developers app
AngryDinosaur said:
Thank you for your work
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
Hey buddy have you notice my magic trick yet?
Sent from my GT-N5110 using Tapatalk 2
Any chance u can add a dual boot with this kernel? Just wondering
Sent from my SGH-T889 using xda premium
theXeffect said:
Any chance u can add a dual boot with this kernel? Just wondering
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
There is someone working on that already.
http://forum.xda-developers.com/showthread.php?p=40410021
Sent from my GT-N7105 using xda premium
theXeffect said:
Any chance u can add a dual boot with this kernel? Just wondering
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
Yah I'll look into that friend. usually just release an aosp and sammy version same kernel as each other just ones for aosp and one is for samsung
Side note per your guys requests voodoo patch among lots of other additions coming in kernel #2 update shaping up nicely. Thanks for all your input appreciate it.
Sent from my SGH-T889 using xda app-developers app
fast charging IMHO is the most useful so the phone isn't dying while being used for GPS or whatever. Undervolt makes me nervous though. I'll watch for a bit to see if there are any reports of phones bricking before trying it. Its not as easy to swap this phone as it was with Sprint if it dies.
robl45 said:
fast charging IMHO is the most useful so the phone isn't dying while being used for GPS or whatever. Undervolt makes me nervous though. I'll watch for a bit to see if there are any reports of phones bricking before trying it. Its not as easy to swap this phone as it was with Sprint if it dies.
Click to expand...
Click to collapse
Fast charge with charge control is coming in kernel #2 (thanks to Andrei for writing that code from scratch)
As for your concern with bricking ive been using kernel #1 for months now do lots of 3d gaming and cpu + gpu intensive tasks and haven't had one reboot or any instability. You wouldn't see any adverse effects from a very slight undervolt as they still get ample juice to function properly.
Sent from my SGH-T889 using xda app-developers app
I just flashed your kernel #1 and I love it!!! Its so fast I just love it I'm on a stock samsung galaxy note 2 with stock jellybean 4.1.2 and with your kernel its rocking thank you
Sent from my SGH-T889 using Tapatalk 4 Beta
LG H440N 4G LTE kernel performance tweaks
FINAL VERSION
any other tweaks I find useful will be posted in the "init.d" section
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Changelog:
27. December 2015 - added FINAL values. Everyone should use these. "They are nice!" - says Borat.
28. December 2015 - added a changelog. Heh!
29. December 2015 - added a super secret, secret testing zone. I dare you to find it. Note that it's well hidden!
30. December 2015 - new tcp tweaks in init.d section, screenshot how it should look like, Recently tweaks.
31. December 2015 - added a link to a web site with an excellent article on battery care. Added Kernel Adiutor tips by jonathansmith.
1. January 2016 - Added 7+ hours SOT settings in the testing zone. Happy New Year!
3. January 2016 - Since I achieved what I aimed for, I am taking a break from this thread. It will stay open, so feel free to keep on discussing.
18. January 2016 - Testing settings became default settings, with a few changes.
29. January 2016 - Low Memory Killer & swappiness value updated.
BATTERY CARE - a must read for everyone!
Disclaimer:
I am not to be held responsible if anything goes wrong. Simple as that. You do these mods of your own free will.
Warning:
Please, do not report issues or complain about lousy battery times/performance, if you've used any of those pre-made scripts that promise godly battery or performance - they often cause more trouble than they're worth, and are mostly snake oil. And often, you cannot easily undo those changes. If you run a lot of background apps ( for example, five different messengers that cause wakelocks or increased battery usage ), then this guide is not for you. Do not report issues if you've modded your phone with any audio scripts ( like v4a ), xposed, or anything like that! Do not report if you did any permanent system mods, period! These kernel are for CLEAN & STOCK phones, that are rooted ONLY. To summarize, I will not bother replying if you did anything to your phone besides the tweaks I recommend.
Nothing done here is permanent. Everything can be returned to stock in a matter of minutes, if you prefer so, just by uninstalling Kernel Adiutor, unfreezing the bloatware and power cycling the phone.
And hugs to all that pushed the "Thanks!" button. Hell, hugs for everyone!!!
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
BEFORE WE START...
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
Must be done before modifying CPU values:
Open your hidden system menu by dialing 277634#*#, go down to Power, find items "High temperature property" and "Thermal mitigation daemon", and set them like this:
High Temp Prop OFF
Disabled
Thermal Mitigation
Disabled
After that, turn phone off, wait 15-20 seconds and turn back on.. The screen will not dim in hot conditions anymore. Benchmarks are higher, games run smoother. And we can tweak our CPUs.
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
KERNEL ADIUTOR SETTINGS
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
Apply on boot time is to be decided by the user. Although Kernel Adiutor waits for boot complete, I noticed ( on few occasions ) that it takes more time to apply the settings properly. Why? Who knows. Depends on the number of apps you have running on boot, version of the firmware or how lazy it is on boot... Safest setting is 40 seconds, but 20 should cause no issues and is preferred. 10 can be a problem.
CPU:
CPU Maximum Frequency: 1209
CPU Minimum Frequency: 800
CPU Governor: interactive
*note: Minimum frequency is set to default 800, since Snapdragon 410 draws the same voltage on 200, 400, 533 and 800. That's the reason I set the frequency back to 800 idle. No need to go lower for absolutely no gain in battery life or performance.
CPU Governor Tunables subsection:
above_hispeed_delay: 20000 1094400:40000
go_hispeed_load: 80
hispeed_freq: 998400
min_sample_time: 40000
timer_slack: -1
DEFAULT ( 7+h SOT ) - target_loads: 1 800000:75 998400:80 1094400:85
PERFORMANCE ( smoother, few hours less SOT ) - target_loads: 1 800000:75 998400:80 1094400:80 1152000:85
timer_rate: 20000
max_freq_hysteresis: 40000
*note: Reason for system lags is found in the cheaper and slower memory LG has used for H440N ( my guess is, to cut cost ). You can test that yourself by running various I/O benchmark tools and noting speeds of random and sequential reads/writes. I did not manage to make that better in any way by tweaking the I/O schedulers, be it deadline, cfq or row - even testing some examples from Franco's Dev Team. Seems that it's best to leave it on cfq and cut overhead with the flashtweaks init.d script found later mentioned in this post.
Frequency changes happen VERY fast. So fast that CPU widgets or passive frequency readers have a lousy time keeping up. Only values you can trust are found in Kernel Adiutor's Frequency Table.
Those values found above are the best possible values for H440N's CPU for performance & battery saving, and I stand by them. If anyone else cares to try and do some tweaking to improve on those, by all means, please do so. If in the future I decide to add new CPU values, they will be strictly performance based, hence no battery saving.
Reason for the CPU frequency sticking to 1209600 is caused by the LG Home launcher. It contains a system call where, if you open up your apps drawer, it immediately ramps up the frequency to the max for almost 8 seconds or until you close the app drawer! That sucks, and is a lazy way for LG to provide smooth app drawer opening/swiping/closing! Bad LG, bad!!!
Two ways to solve that:
1. Spend less time listing through your apps drawer, since the frequency drops as soon as you stop swiping through it, or...
2. Freeze LG Home and use another launcher ( like Nova or Apex ), if you don't mind losing Double Tap to Wake, or work around that problem with launchers that support double tap gesture and link that gesture with a screen off app like this. Do not freeze any LG Home system apps, besides Easy Home. No need. System will automatically kill the unneeded launcher. Just follow my frozen bloatware list. Nothing more, nothing less.
Low Memory Killer values ( top to bottom ):
48
60
72
84
96
120
Virtual Memory:
vfs cache pressure: 100
swappiness: 80
Build prop Editor
dalvik.vm.heapsize: 174m
dalvik.vm.heapminfree: 512k
dalvik.vm.heapstartsize: 8m
dalvik.vm.heapgrowthlimit: 128m
dalvik.vm.heaptargetutilization: 0.75
dalvik.vm.heapmaxfree: 8m
*note: Dalvik tweaks are based upon Intel's recommended Dalvik tweaks for Lollipop phones with 1 GB RAM and xhdpi displays.
Init.d
1. Turn on "Emulate Init.d" and click that big "+" to create a new script.
2. Name the new script: flashtweaks
Contents of the "flashtweaks" script are:
Code:
#!/system/bin/sh
echo 0 > /sys/block/mmcblk0/queue/nomerges;
echo 2 > /sys/block/mmcblk0/queue/rq_affinity;
echo 512 > /sys/block/mmcblk0/queue/nr_requests;
echo 0 > /sys/block/mmcblk0/queue/iostats;
echo 0 > /sys/block/mmcblk0/queue/add_random;
echo 0 > /sys/block/mmcblk1/queue/nomerges;
echo 2 > /sys/block/mmcblk1/queue/rq_affinity;
echo 512 > /sys/block/mmcblk1/queue/nr_requests;
echo 0 > /sys/block/mmcblk1/queue/iostats;
echo 0 > /sys/block/mmcblk1/queue/add_random;
2. Name the new script: tcptweaks
Contents of the "tcptweaks" script are:
Code:
#!/system/bin/sh
#more reasonable tcp tweaks
echo 1 > /proc/sys/net/ipv4/tcp_low_latency;
echo 0 > /proc/sys/net/ipv4/tcp_timestamps;
echo 900 > /proc/sys/net/ipv4/tcp_keepalive_time;
echo 5 > /proc/sys/net/ipv4/tcp_keepalive_probes;
echo 156 > /proc/sys/net/ipv4/tcp_keepalive_intvl;
Example of properly added scripts. I just named them differently:
Ignore the "99SuperSUDaemon" script unless you know what it is. It's not needed for our tweaks, and if you don't have it, it's perfectly fine.
Here are some screenshots on clearing / checking Kernel Adiutor's Frequency Table, by our fellow XDA member jonathansmith:
How to clear timers?
Check correct frequency usage.
Now, since you've finished with Kernel Adiutor, power cycle the phone. You're almost done. All that's left are:
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
OTHER SETTINGS
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
In Developer options, set animation scale values to OFF.
In Settings / Display / Brightness enable Night Brightness. Who needs anything over 0% brightness from midnight to six in the morning?
Visit Play Store and install these apps:
Recently by Chainfire
Trimmer (fstrim)
Recently! settings ( preferred ):
Age limit: No limit
Entry limit: 12
Apply on boot: Yes
Freeload: Checked ( yeah, we're cheapskates )
EVERYTHING ELSE DISABLED / UNCHECKED.
Recently! settings ( much faster version ):
Age limit: Running apps only
Entry limit: Running apps only
Apply on boot: Yes
Freeload: Checked ( yeah, we're cheapskates )
EVERYTHING ELSE DISABLED / UNCHECKED.
Do a "Clear all" in recent apps list after a reboot. It will make things faster. Believe me.
As for Trimmer (fstrim), run that every week or so, on "/data", "/cache" and "/system". No need to run it daily.
Apps frozen with Titanium Backup ( freeze bloatware, do not delete it - you'll thank me later ):
Chrome
Drive
E-mail
EasyHome
Gmail ( I am using Aqua Mail. )
Google Play Books
Google Play Games
Google Play Movies
Google Play Music
Google Play Newsstand
Google Search
Google+
Hangouts
HTML viewer ( do not disable if using stock browser or Chrome )
Internet ( I am using this version of Opera. It's the best one.
LG Keyboard ( disable only if already using another keyboard. I am using Smart Keyboard. )
LG Keyboard Black Theme ( disable only if already using another keyboard. I am using Smart Keyboard. )
LG MLT ( disable LG MLT in the hidden service menu before freezing it! Menu code is 277634#*# )
Live Wallpaper
Music ( both widget and app - I am using PlayerPro. )
Trusted Face
Weather
Weather Theme
WeatherPlatform
Do not touch anything else! Don't say I did not warn you.
If you prefer blocking ads on web sites, like I do... then download AdAway from XDA forum, and enjoy ad-free surfing.
That's it. Have fun, and enjoy your buttery smooth phone. One of this year's best-buy smartphones. Too bad it doesn't get the attention it deserves. Really, an unsung hero if there ever was one.
Although there are a lot of other CPU tweaking values throughout the thread, these values are the standard ones you should use. Other ones are experiments, or just plain testing values.
H440N is compatible with DriveDroid - in case you want to boot an operating system or a Linux distro off of it.
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
SUPER SECRET, SECRET TESTING ZONE
●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬●
by WellHidden™
THESE SETTINGS BECAME THE DEFAULT SETINGS. SEE ABOVE.
With the latest test settings I achieved 7+ hours SOT. And yes, it can be done! You got the proof below.
Everything else besides these TESTING values below stays the same as in FINAL values ( dalvik, init.d, etc. ).
CPU:
CPU Maximum Frequency: 1209
CPU Minimum Frequency: 400
CPU Governor: interactive
CPU Governor Tunables subsection:
above_hispeed_delay: 20000 1094400:40000 1152000:20000
go_hispeed_load: 82
hispeed_freq: 998400
min_sample_time: 40000
timer_slack: -1
target_loads: 72 998400:82 1094400:85 1152000:86 1209600:90
timer_rate: 20000
max_freq_hysteresis: 40000
Virtual Memory:
Swappiness: 60 ( I recommend 100, but go back to 60 if you feel the memory gain is not worth a slight performance drop. )
Vellamo 3.2 scores:
My phone was originally set at frequency max 1200 and min 1200. After all the changes you suggest, do you set the min cpu frequency at 200 or leave it on 1200?
polfrank said:
My phone was originally set at frequency max 1200 and min 1200. After all the changes you suggest, do you set the min cpu frequency at 200 or leave it on 1200?
Click to expand...
Click to collapse
Min 200 Max 1200
Interactive / Noop
Other values as suggested.
But, damn. Those original settings must've drained the battery like hell... Are people at LG crazy?
EDIT: Sometimes, SetCPU will show the lowest frequency as 1200, but don't worry. Set it to 200, and verify it's at 200 in Times in state on the last SetCPU tab. It seems to be a bug in the app. That's why I used Kernel Adiutor.
ondemand + noop + lmk set to agressive and the phone flies like never before! looks like constant 60 fps. Thanks op!
Always glad to help out. Like I mentioned before, this phone has good hardware and is capable of stellar performance. Only problem is LG did not pay much attention on the tweaking side of things.
It's easy for them to tweak flagships
EDIT: Just found out about another gem! The app is called Recently by chainfire.
Installed, tried and it's marvelous even on default settings. I encourage everyone to try it. It's what Recent cards were supposed to be, in my opinion.
So I installed Busybox and Kernel Adiutor, set CPU min frequency to 200 Mhz, cpu governor to interactive and and I/O scheduler to noop. I've set both to apply on boot. Is that everything I need to do?
Fobos531 said:
So I installed Busybox and Kernel Adiutor, set CPU min frequency to 200 Mhz, cpu governor to interactive and and I/O scheduler to noop. I've set both to apply on boot. Is that everything I need to do?
Click to expand...
Click to collapse
It is, if you don't mind the default Interactive values. Otherwise, go a bit lower to "CPU Governor Tunables". Click that and set values as mentioned in first post. Those give a much better battery life.
After that, my recommendation is to visit the Low Memory Killer section and set that to Aggressive and apply on boot.
I can say that, after a bit of tweaking, this phone rocks! Glad to have bought it. Still hoping for a unlocked bootloader and maybe a CM port
Can you please take a screenshot of your CPU Governor Tunables section? I'm not completely sure that I did it right.
No problem, my good man. Here they are:
http://imgur.com/yDbXHE3
http://imgur.com/3uDi04u
holy ..! this really does make a difference. is it ok if i set cpu to "performance" and dont mess anything else with it? i dont care about battery life that much. cuz it seems that with agressive setting for ram, and changing to "noop" made wonders for me performance wise
Performance governor forces 1200, so that's not desirable.
For the best performance with lowest idle, set it to Ondemand / Noop. You will lose a bit more battery with those, but the phone will fly.
Otherwise, set as I've set it. Tweaked interactive.
userspace,powerspace hotplug and performance is what i have in karnel auditor.. which one should i choose then? tyvm!
p.s. thanks again for these tips man
That's strange. Are you using the LG Spirit H440N or some other variation?
See here ( list of governors ):
http://imgur.com/hxZOoDz
ah right. that could be a reason.. i use 3g version, with mediatek cpu
* moved to first post *
Tomo123 said:
Performance governor forces 1200, so that's not desirable.
For the best performance with lowest idle, set it to Ondemand / Noop. You will lose a bit more battery with those, but the phone will fly.
Otherwise, set as I've set it. Tweaked interactive.
Click to expand...
Click to collapse
amazing speed and multitasking (with Recently), thank you for this
Can you help me with target loads? Is this ok?
Sent from my LG-H440n using Tapatalk
String seems to be written ok, but my guess is it will clash with go_hispeed_load value.
If go_hispeed_load has a value of 85, then your initial value in target loads can't be "1". It must be higher than 85.
We're using our hispeed frequency ( 400000 ) as idle. It often drops to 200, so I see no reason of adding 200 to target loads.
Did you check out my post above?
Also, take a look at my KA frequency table:
http://imgur.com/BikoQk2
It seems that ive messed up something. Now my phone wont go deepsleep. This is the result over night.
Sent from my LG-H440n using Tapatalk
Can you make a screenshot of your target loads. Im having a hard time making it work. Performance is on point but i get a lot of battery drain.
Sent from my LG-H440n using Tapatalk
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*** NOTE THAT 3.16 NA OR 4.13 Red Magic 5G SPECIFIC ROMS SHOULD BE USED WITH THIS KERNEL! THE COMBINED ROM (WITH RM5S) HAS UPDATED KERNEL CODE THAT IS NOT FULLY COMPATIBLE AND NUBIA HAS NOT UPDATED THEIR SOURCE CODE ***
*** Please click Thanks (Thumbs up icon) on my post here if you like my kernel and rate the thread 5 stars, then just use it and enjoy - if you want to send me a beer or two feel free - you don't have to use PayPal - Revolut and Amazon.com (USA) gift cards avoid fees. I like to hear from happy users I hope you are glad that you have the fastest phone in the world currently. The active cooling in this device is utilized to the extreme with MOD kernel, meanwhile your battery usage will be much improved at the same time. How? Well, that's all in the source code, free for all to fork it on GitHub and modify to your liking. Just don't forget to credit me and the many great devs that made the improvements possible... without them, there would be no MOD kernel. This is just a hobby of mine and I like to produce a nice product that all can enjoy. I'm also quite friendly and although I may tell you no I won't add that feature (such as network hacking tools), I won't hold anything against you for asking. I have not been compensated other than by some generous folks on my Telegram channel, so this whole project is basically self funded. Red Magic will not support it, unfortunately, but you can if you feel the improvements are worth it. I believe they are, but I come from a biased point of view as the sole developer for RM5G ***
********************************************************************************************************************************************************************************************************************************
NOTICE: YOU ASSUME FULL LIABILITY FOR ANYTHING THAT MAY HAPPEN TO YOUR PHONE USING THIS KERNEL. ALTHOUGH IT WORKS 100% ON MY PHONE, IT MAY NOT WORK THE SAME ON YOURS. THE PROCESS OF ROOTING A PHONE AND INSTALLING A CUSTOM KERNEL ALWAYS HAS RISKS, SO IF YOU ARE NOT COMFORTABLE ASSUMING THOSE RISKS, DON'T INSTALL THE KERNEL! THIS IS A TYPICAL DISCLAIMER FOR CUSTOM KERNELS I HAVE FOUND NO BUGS WITH IT AT ALL. USERS ON CN, GLOBAL, AND NA ALSO HAVE NOT FOUND ANY PERFORMANCE ISSUES OR BUGS (DO NOT USE V7.14 or V8.11) IF YOU DON'T KNOW WHAT YOU ARE DOING, IT'S BEST TO REMAIN STOCK. OR JOIN THE TELEGRAM GROUP, AND GET SOME REAL HELP.
********************************************************************************************************************************************************************************************************************************
Easy root method: https://forum.xda-developers.com/nu...nner-tutorial-unlock-bootloader-t4131585/amp/ although I suggest still using Magisk 20.4 for root.
Note: if you've already rooted and want to upgrade, people have had success saving the kernel as boot.img and TWRP as recovery.img in SmartPack, vbmeta skip as vbmeta.img and placing into the ROM update.zip using MT Manager (a root browser) and saving the updated file. Then do a Settings / System Update / click the 3 dots / local update and select your modified file. In fact I upgraded from 3.13 to 3.16 NA ROM without losing anything this way. Now for normal installation:
Custom kernels require root and Magisk to be installed. This is due to the signature not being signed by Red Magic (the company) itself. Following the above method you will still pass SafetyNet and most apps will work without trouble. If you have a specific app that detects root, well, Magisk Hide the app from Magisk Manager and see if that fixes it. You should also Hide Magisk Manager from various forms of detection (under Settings). Last case is to move the installation of Magisk under a random directory (which I have not had to do and all my banking apps still work), only if the root detection methods used by your app providers are more picky.
MOD KERNEL 1.4 STABLE:
RELEASE NOTES:
Block mode I/O has been changed to Multi-Queue from Single-Queue so your default scheduler is now MQ-deadline (credits to PappaSmurf, excellent kernel dev). You can choose between mq-deadline, kyber, and none in a kernel manager under I/O scheduler. From my benching with Androbench, it doesn't make much difference which one you use. Some have parameters you can tweak. None literally means no scheduler which is fine on an SSD, and has no overhead if you want to select it in a kernel manager. I always recommend SmartPack. To get settings to stick you Toggle "Apply on Boot" and it will go to what you've selected after 5-10 seconds on the next boot.
All debugging has been turned off completely on BBRv2 - thanks to PappaSmurf (I missed a few spots), and debug can't be turned back on from the userspace now. BBRv2 is selected as the default TCP algorithm which users have explained as a "no-lag" algorithm while gaming. It's just generally a fast algorithm all around. For me it works great, but you can still choose from many different algorithms in a kernel manager if you want to.
In SmartPack / Misc / TCP Congestion Algorithm, you have many choices: reno / bbr / bbr2 / bic / cdg / cubic / dctcp / westwood / highspeed / hybla / htcp / vegas / veno / scalable / lp / yeah / illinois. A SmartPack script is included below you can add in SmartPack to show the true TCP algorithm as it will always show Reno (a bug also shared by FK kernel manager). Below it's called Check_TCP.sh just go to SmartPack / Script Manager / Import / Check_TCP.sh. Afterwards, click Execute to see the active algorithm. If you set it on boot, this is the algorithm that will run, despite what the field says in Misc.
Battery is running very well on normal usage I'm getting around 7.5% active screen on drain over 7 hours and <0.7% screen off drain over 13 hours at 90hz screen setting. This is with actively using the phone for multiple "normal" purposes, reading emails, browsing websites with Chrome, reading news, streaming videos, etc. various shopping (Amazon/eBay) and tracking, Reddit feeds and live video, and other random "daily" tasks, up to 10 apps open at a time. Gaming of course will drain more, as will 144hz. I also have dark mode enabled in Settings. To get idle drain down I disabled 3 additional wakelocks that were causing high screen off drain, and so far I haven't seen an issue with blocking them. I also removed wakelocks that no longer exist since the Boeffla WL Blocker default list was created (it was quite old) so it now should be relevant for this device, with no interaction on the users part to disable anything via a kernel manager. Still, in SmartPack you will see a Wakelocks menu in case you install an app that causes idle drain to rise, this can be used to find and block wakelocks causing the problems. It can sort by wakeups and also by time. As it states though, you should be very careful what you disable. There can be unintended consequences and most wakelocks are not well documented as to what they actually control.
Dynamic Stune Boost is entirely removed from the kernel code now, as I didn't see any benefit from using it with this kernel.
Don't forget Dynamic Fsync is hidden under Misc in SmartPack which if you turn on will speed up your SQLite speeds. AnTuTu will penalize you for this, ignore it, your phone will be faster - but I leave it off by default. Androbench will show the true memory benefit. It is significant if an app does a lot of operations on databases. Journaling for the database is held in memory until the screen is off, then it is written. Although there is a chance of a data loss or corruption with this on if the device were to crash, it is safer than just turning off fsync. If you have any unstable apps, just leave it off - better to be safe. On a solid system though, you may notice better performance.
Also remember under SmartPack / GPU there is AdrenoBoost - it is set to low. You can alter to medium or high to get faster transfer between GPU frequencies, although it has worked great for me the way I use the phone. For you another setting may suit you better. Recall RedMagic OS only allows several frequencies which I spaced out as well as possible at 305mhz, 400mhz, 525mhz, 670mhz, 800mhz, and either 900 or 940mhz depending on the version you installed.
Overall I'm very satisfied with this kernel build and don't plan on adding or subtracting anything from it for the time being. It does what it should do, gives solid performance, and good battery life. My last score on AnTuTu setup with defaults 12GB/256GB was 682K which currently is still the top performing phone out there - running at 940mhz GPU. Not all phones can handle 940mhz so use 900mhz if yours cannot. If there are enough requests for an intermediate build (say 925mhz) I can add one later off the same code base. Also note in releases there are "gaming" builds that don't keep track of CPU times at each frequency, which was a request by users to remove any potential lag while gaming. I run the non gaming version, useful if you want to tweak battery usage, but nonetheless, both versions are there for you to use.
I'm on Telegram t.me/NubiaRedMagic5G_Mods as long as I have the phone. Which will be quite a while if Red Magic / Nubia decides to fix N41 5G in the USA.
Also note that all the features of this kernel (besides ones specifically added by me) are the creation of other developers whose contributions are all notated in the kernel source code. Some of the developers that have contributions here or helped me in some fashion: Resurrect88, DD3Boh, PappaSmurf, kdrag0n, Ayrton990, Flar2, Lord Boeffla, plus many more across the globe. Without them, I wouldn't be making any kernels! And I'm sure there are many other devs I've forgotten to mention, I thank all you guys for your help and support.
MOD 1.4 Download Link:
https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.4
PRIOR RELEASES BELOW:
8th Release:
MOD KERNEL 1.35-BBRv2 STABLE:
RELEASE NOTES:
This is an intermediate release - I realized that the prior release was draining far more battery than it should, and I found the source was debug related code in BBRv2 from Google. So this is the updated kernel that gives you battery life like before this TCP algorithm was added.
CONFIG_CPU_FREQ_TIMES=y has also been added so you can see in a kernel manager how much time is spent in each mhz block for each set of processors. This can be useful if you set in a kernel manager (like SmartPack) a minimum CPU mhz to see how much time is actually spent at each level.
The code base also has Dynamic Stune Boost, but I haven't had time to optimize it for the device, so it's just on default settings. So there are 2 versions of this 1.35-bbr2 release. At some point it will be enabled as part of a regular release (some 17 commits squashed together into 1, Stune Assist was causing issues so I turned it off). The main idea of that set of code additions is to run the device at lower frequencies, saving battery, while still achieving the same performance level to the user of the phone. If you want to try different options for it in SmartPack or FK Kernel Manager you can.
Downloads:
https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.35-bbr2
7th Release:
MOD KERNEL 1.3-BBRv2 STABLE:
RELEASE NOTES:
Added the 31+ commits for BBRv2 from Google. Squashed the commits down to 6 by author from Google (for easy code maintenance). It's said to be the best TCP (internet congestion) algorithm so this sets it by default. You can still select from the others added in 1.3, as mentioned only EX Kernel manager properly shows them. But SmartPack if you choose the one you want under Misc, then click Apply on Boot, it actually will load the TCP algo you selected. It's just a visual defect. I also made a script for SmartPack uploaded to show you the TCP algo that's selected in my repo you can install so you can verify for yourself. Give it 10 seconds (default on boot setting) before you check.
Downloads:
https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.3-bbr2
6th Release:
MOD KERNEL 1.3 STABLE
RELEASE NOTES:
All this release adds is TCP congestion algorithms. The only kernel manager which correctly shows the algo set correctly is EX Kernel Manager. Using SmartPack or FK Kernel Manager will tell you that you're always on Reno, when in fact, you aren't. I'm not quite sure if this is bug related to 865 kernels as a fellow dev had the same experience (on an Op8 Pro). Now the default is set to BBR. Why? No reason specifically, although it is one of the better algorithms for internet usage. You can easily change in any kernel manager and set on boot which one you'd like to use (see above RELEASE NOTES if using SmartPack). But this gives you plenty of options:
BBR, BIC, CDG, CUBIC, DCTCP, WESTWOOD, HSTCP, HYBLA, HTCP, VEGAS, RENO, VENO, SCALABLE, LP, YEAH, ILLINOIS
You can Google the benefits of each and pick what you like. Or just leave it alone. The prime idea of MOD kernel is that you don't need to adjust anything it just works optimally without any intervention. Read the release notes for prior features that have been added. There are many just not summarized in a single place at the moment. All the optimization has been done for Red Magic OS.
Downloads:
https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.3
5th Release:
MOD KERNEL 1.25BETA
RELEASE NOTES:
This release is mostly about battery savings. I'm averaging around 6.5% active drain on normal tasks with this version (90hz setting), and around 0.5% screen off drain. A big improvement over the stock kernel. So I ended up with about 13 hours SOT + 24 hours screen off on 1 charge! See the picture, I stopped at 11% left. Now I didn't say anything about gaming. If you want to game and have power saving benefits, don't enable any of the built in boosting modes in the game launcher - the Red Magic OS will override everything. Let the kernel do the work for you. And if you're seeing any graphics lag, go into SmartPack kernel manager (free) and go under GPU, Adreno Boost is enabled on low, you can set it to medium or high. That will increase the speed at which the GPU throttles up and down.
1) Switch to the Energy Model for CPUs: Several subsystems (thermal and/or the task scheduler for example) can leverage information about the energy consumed by CPUs to make smarter decisions. This config option enables the framework from which subsystems can access the energy models.
2) Added CPUMASKS for the Little, Big, and Prime cores from Sultan Alsawaf Sultan: SultanXDA, prime added by Danny Lin: kdrag0n.
3) Added kernel control of the minimum frequencies for the little and big clusters by Danny Lin kdrag0n. They are set to run at their minimum running frequencies when idle 691mhz (little) and 710mhz (big) which results in nice power savings when web browsing or just under low load in general. Prime cluster min is not set as it makes the CPU scheduler function poorly.
4) Added AdrenoBoost by Aaron Segaert: Flar2, with all its changes squashed into 1 commit. Defaults to low setting. As mentioned before, you can change in SmartPack, and set on boot if you need a higher value than low: https://github.com/SmartPack/SmartPack-Kernel-Manager/releases
5) Uploaded the various GPU OC files to the repo, It still will just build off the default one, but they are here to be complete. 940mhz version again is posted, Building direct from the repo will give you 900mhz max GPU.
Downloads:
https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.25BETA
4th Release:
MOD KERNEL 1.2 BETA
RELEASE NOTES: (Note a 940mhz GPU clock edition is available, if you want to try it, a few of us have had good results on it. Likely the max an 865 GPU can run. You'll sacrifice the power savings, however):
1) Enable Power-efficient workqueues by default, add a toggle that can turn this off via a kernel manager (under CPU in SmartPack). Enabling this makes the per-cpu workqueues which were observed to contribute significantly to power consumption unbound, leading to measurably lower power usage at the cost of small performance overhead. Have also added many other power saving features to the defconfig. The phone is a beast, power savings is a good thing to implement.
2) Update the LZ4 decompressor algorithm with a much faster variant for the ZRAM swap, now version 1.8.3-9 credits Gao Xiang [email protected] and many others (check commits). Speed improvement below (should help on 8GB devices):
Compressor name Compress. Decompress. Compr. size Ratio Filename
lz4hc 1.7.3 -9 12 MB/s 653 MB/s 42203253 42.20 enwik8
lz4hc 1.8.3 -9 11 MB/s 965 MB/s 42203094 42.20 enwik8
3) Default scheduler is set to SQ deadline. Should see minimal improvements in speed until I get a MQ variant working. On the task list ahead.
Download Link:
1.2BETA: https://github.com/mrslezak/NX659J_Q_kernel/releases/download/1.2BETA/MOD-RM5G-GPUOC-Beta1.2.zip
940mhz GPU release here, it's still 1.2BETA, just with the max clock a few of us have been able to use. That doesn't mean your device can for sure handle it, but give it a try if you'd like! Note the power savings will likely not be there vs the other release at 900mhz:
https://github.com/mrslezak/NX659J_...oad/1.2BETA/MOD-RM5G-GPUOC-940mhz-Beta1.2.zip
3rd Release:
1.15BETA: https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.15BETA
This is a HEAVILY updated release of the MOD kernel 1.10BETA - I realized the phone's software will allow 6 frequency clocks, although 1 did not have a regulator defined (now patched). NOW I VERY HIGHLY suggest installing SmartPack Kernel manager. It will give you insights into the kernel and how it's performing and it's free. It also will let you adjust added options now in the kernel. Just root your phone and flash from TWRP. If you haven't already installed Magisk, then install that too. There's a guide I posted on XDA about that. Use the experimental method there is no reason to unlock your bootloader. https://forum.xda-developers.com/nu...how-to-unlock-bootloader-redmagic-5g-t4081743
RELEASE NOTES:
1) Bugfix: there was 1 missing 800mhz GPU frequency regulator clock on the prior version. This has been set to TURBO, 1 level under the 900mhz regulator of TURBO_L1.
2) Boeffla WakeLock blocker (v1.10 + tweaks) has been added to reduce battery drain when the phone is not being used, using the latest version and all patches. A default block list is included. You can access in SmartPack Kernel Manager under the new menu that will appear "Wakelocks" - especially investigate if your phone has high idle drain, you can experiment with blocking other wakelocks (which don't allow your phone to sleep). Or you can leave as is. I get just under 1% drain (screen off) and the phone sleeps quite often with this version. Take a look at the screen shot! That's just normal phone usage, not gaming.
3) All debug entries (except those required) have been stripped completely out of the kernel. This results in less wasteful debug information being generated.
4) The default algorithm for ZRAM has been changed from LZO (high compression, but slow) to LZ4 (slightly less compression, but fast). LZ4 algo was added. It still defaults to 4GB.
5) Dynamic Fsync has been added to the kernel as well. This patch allows journal entries to be written only when the screen is off. I.e. they are cached and written afterwards. This increases database performance. It is disabled by default so in SmartPack Kernel manager, if you'd like to turn it on, go under Misc, select Dynamic Fysnc, and select apply on boot. There is always a risk of data loss when delaying writes, although I've personally never have had issues - it only happens if the phone crashes, and mine has never crashed on this kernel. This won't normally increase your benchmark scores (except AndroBench), it increases SQLite database access speed. Up to you to use or not, works fine on my device.
6) Here are the updated frequencies (note there is 1 more). Will have to wait for AOSP before I can add back more. Note the 670MHz is likely the 865+ max frequency per the release notes today on the device (which I assumed by the source code anyhow pre-announcement): 900MHz / 800MHz / 670MHz / 525MHz / 400MHz / 305MHz
AS ALWAYS, USE AT YOUR OWN RISK!!!
Github Source:
https://github.com/mrslezak/NX659J_Q_kernel
Initial Release:
https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.0.BETA
Second release - gets over the "reset to 490mhz" bug caused by the system software, at the expense of reducing frequencies to 6 total:
https://github.com/mrslezak/NX659J_Q_kernel/releases/tag/1.10BETA
Newest release -> will be posted on the top from now on.
Telegram:
https://t.me/NubiaRedMagic5G_Mods
And note the AnTuTu benchmark is just a first run after installing. 670K is likely a record on any 865 phone. The last bench turning off 4GB ZRAM (12gb/256gb device) I got 673K. AnTuTu doesn't equal performance, but if you've benched you'll see this is an insane improvement over the stock kernel. Only when the demand is there will it scale up to 900mhz. I've been using for a while now and notice no difference in battery life. The Adreno driver is very good at handling extra clock frequencies efficiently without modification (despite an "Adreno Boost" that is often added to kernels). The gamers using the kernel are making statements that they couldn't imagine the game play any better than it already was, but now it's even smoother.
Unfortunately the way the Nubia software behaves, it auto-resets to power level 5 (which was 490mhz) on the 1.0BETA on boot and also after boosting the frequencies up. I tried every possible way to bypass this but eventually just gave in and removed frequencies. So the BETA1.10 and above have less frequencies but will always revert to 305mhz, the base minimum frequency of the device. Hopefully once we have AOSP ready I can add more.
MattoftheDead
I.e. M.O.D. Kernel Developer
The first Red Magic 5G OC kernel.
Xiaomi Mi9 / Mi9T Pro Pie V2 and Q V1.5 Kernel Dev
Nice work. Do you notice any benefits to OCing the GPU like that? I don't think there are many games that would benefit atm.
This is amazing !!! :laugh:
Is this going to work on all roms like CN, NA or EU Roms? Im currently running NA 3.11 flash from CN rom with root and twrp
We have people using it on CN Global and NA versions no problem at all. Works fine on every model.
Kernel is fully functional no issues at all.
CN Rom to NA Rom v3.11
305mhz min to 900mhz max confirmed and using smart pack to control the frequency
Thank you for this hopefully there is more development i really appreciate ur effort
Kernel building is just a hobby of mine, I was posting a minimal kernel to get some more kernel developers on board to hopefully add more features. I usually add Boeffla Wakelock Blocker and Dynamic Fsync and call it a basic kernel. The last super kernel I made took way too long, and I don't have that kind of time anymore - boost functions and underclocking to balance out the battery life and such. Development work doesn't pay anything, I didn't get the phone free, all my donations go to other developers. And I have a full time job and family. But if anyone wants to port over my MOD Kernel Q 1.5 Mi9 features, well that would be a super kernel. It's just really, really time consuming, time I don't have at the moment. And the merging of source has to be EXACT or you end up with a really slow phone rather one that balances underclocking, boost, and overclocking.
MishaalRahman said:
Nice work. Do you notice any benefits to OCing the GPU like that? I don't think there are many games that would benefit atm.
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All the gamers using the kernel are reporting that the games run smoother than before, which no one thought was possible. It is already a flagship device. But the GPU OC with the Adreno driver scales when needed up to the frequencies that it has in the table and has no issue on 670, 800, and 900mhz reported so far. There are gamers on NA, Global, and CN ROMs, with no bugs reported. No issues and everything works properly. I have tested myself and although I'm not a gamer, all the functions work as they should. It still connects via Bluetooth, it still takes photos and videos, etc. There is no lag whatsoever. Overall I think the frequencies are ideal for this device with it's advanced active cooling system. Other devices however, with passive cooling, are unlikely to handle the increased GPU clocks.
I found an unusual bug where the GPU Minimum Frequency will reset on its own to 490mhz even if i set the minimum frequency to 305mhz im using smart pack kernel manager that you provided and cool tool btw to monitor the gpu frequency.
I also set the battery optimization to off on smart pack so it wont turn off itself.
This also happens when i played games that actually boost to 800 to 900mhz then after i close the game it sets back the minimum frequency to 490mhz so i have to set it again to 305mhz on the kernel manager to save more battery and lower the temps.
I also notice it sets back to 490mhz minimum frequency by just watching youtube videos so i have to set it back to 305mhz again. I tried different kernel manager too like Franco Kernel Manager and Kernel Audiator and still doesnt fix the issue
I think this was a minor bug for sure
I never touch the GPU governor btw
Performance was super nice thou i scored 645k on antutu on my first run but for now im going back to stock and gonna wait for your next update
What to do to root the phone without breaking the fingerprint please. I read the article publish nothing understood someone can explain to me step by step. I am an amateur I never root a phone. I have cn 2.55 16gb.
I don't have the same issue - I just tried to recreate it by watching a YouTube video and I went back to SmartPack and it still shows 305MHz GPU frequency. Although I'm using the debloated / optimized ROM I created Black Magic 5G which has everything setup properly, Nubia apps frozen, everything moved to 3rd party apps. NETFLIX patched to 4K HDR10, YouTube Vanced, a ton of root utilities, AdAway ad blocker, etc. You can find it on the Telegram channel (I'm using the NA/Global version of Black Magic 5G). Then I watched Netflix, still at 305mhz. As I have no idea how you've setup your phone, I just can't recreate it.
shaifabra5 said:
I found an unusual bug where the GPU Minimum Frequency will reset on its own to 490mhz even if i set the minimum frequency to 305mhz im using smart pack kernel manager that you provided and cool tool btw to monitor the gpu frequency.
I also set the battery optimization to off on smart pack so it wont turn off itself.
This also happens when i played games that actually boost to 800 to 900mhz then after i close the game it sets back the minimum frequency to 490mhz so i have to set it again to 305mhz on the kernel manager to save more battery and lower the temps.
I also notice it sets back to 490mhz minimum frequency by just watching youtube videos so i have to set it back to 305mhz again. I tried different kernel manager too like Franco Kernel Manager and Kernel Audiator and still doesnt fix the issue
I think this was a minor bug for sure
I never touch the GPU governor btw
Performance was super nice thou i scored 645k on antutu on my first run but for now im going back to stock and gonna wait for your next update
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Click to collapse
Yeah maybe because you modified the rom.
Im currently running Flash Global V3.11 when i tested your kernel no modification made im just rooted with TWRP Installed and i posted this kernel on red magic 5g group on facebook and 3 of us having the same issues as well.
Im gonna try it again on V3.13
UPDATE:
still returning to 490mhz as minimum frequency after gaming and after watching one youtube clip
kinda sad hopefully you can fix this bug on the global rom that nubia provided if you have the time, great kernel for gaming because of the 900mhz boost and the phone can sustain this boost because of the active fan
Why don't I have a roughly similar score?
Is it possible to overclock the CPU as well? They officially release the specs sheet of ROG Phone 3 it has overclocked CPU (3.091ghz) and an overclocked GPU. I know this phone can keep up with those clocks because of the cooling system but the problem is the battery life. But still, its worth it.
Blink003 said:
Is it possible to overclock the CPU as well? They officially release the specs sheet of ROG Phone 3 it has overclocked CPU (3.091ghz) and an overclocked GPU. I know this phone can keep up with those clocks because of the cooling system but the problem is the battery life. But still, its worth it.
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I believe Qualcomm blocked overclocking of CPUs quite a while ago from SD845. Only GPUs can be overclocked.
Though I don't know if devs have gotten tools to get around it.
The 490 bug looks like it's related to the gaming mode APK resetting the min frequency. I can't decompile or recompile APKs so I don't have a way to get around the system reverting to 490 without removing 3 other frequencies. It seems hard-coded in the app that it only expects to see 5 frequencies so to have all working properly, 3 need to be removed. This is in contrast to what my buddy dev on the Op8 Pro can do, but this device is designed differently in how it boots and custom apps that increase frequency clocks. If any devs are good with APKs it's a very simple function call that sets the minimum GPU frequency. The only odd thing I see is that the minimum power level stays at 8 (minimum) which corresponds to the lowest clock speed. That number doesn't change in a kernel manager when the min GPU clock reverts to 490.
I'm off on vacation not near a PC but will try to come up with a stock # of clock frequencies that still scrolls smoothly between them and the Adreno GPU driver. May take a few tries but it's quite easy to modify. I already think 180mhz is too low from using it, it's more of a sleep frequency some suggested going this low but I think the phone design is for 300+. I prefer to use more clocks for better throttling but have to work with what we are given and do the best inside those boundaries.
No you can't raise CPU clocks on 865 devices that ROG device is supposedly using the 865+ or whatever the mid device is named between the 865 and 875. They have blocked CPU OC hardware wise for some time now.
mslezak said:
No you can't raise CPU clocks on 865 devices that ROG device is supposedly using the 865+ or whatever the mid device is named between the 865 and 875. They have blocked CPU OC hardware wise for some time now.
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Qualcomm's Meizu’s CMO Wan Zhiqiang recently commented on Weibo saying that there won’t be a Snapdragon 865 Plus this year.
We will see!
No 865+ this year..
Trust me whatever they call it it's already defined in the source code as a second GPU bin clock for another device ID. So maybe it won't be called an 865+ but there is some device between the 865 and 875 coming out. I have OEM confirmation as well this device exists the name isn't important. I can tell you the top GPU frequency is 670mhz that's it, vs. the 587mhz default on the 865. Still the 865 handles 900mhz GPU no problem the only benefit would be higher CPU clocks. And an extra GPU clock. Which I'll attempt to spoof next time I get near a PC.
mslezak said:
Trust me whatever they call it it's already defined in the source code as a second GPU bin clock for another device ID. So maybe it won't be called an 865+ but there is some device between the 865 and 875 coming out. I have OEM confirmation as well this device exists the name isn't important. I can tell you the top GPU frequency is 670mhz that's it, vs. the 587mhz default on the 865. Still the 865 handles 900mhz GPU no problem the only benefit would be higher CPU clocks. And an extra GPU clock. Which I'll attempt to spoof next time I get near a PC.
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Is it possible to overclock the memory clock too? I assumed that 900mhz is the core clock.
mslezak said:
Trust me whatever they call it it's already defined in the source code as a second GPU bin clock for another device ID. So maybe it won't be called an 865+ but there is some device between the 865 and 875 coming out. I have OEM confirmation as well this device exists the name isn't important. I can tell you the top GPU frequency is 670mhz that's it, vs. the 587mhz default on the 865. Still the 865 handles 900mhz GPU no problem the only benefit would be higher CPU clocks. And an extra GPU clock. Which I'll attempt to spoof next time I get near a PC.
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You're right, that makes sense.
I'm glad they are making a refreshed chip.
On another note, do you think we will see an overclocking tool in the future?
Possibly with a custom ROM?