Database Develop

CPU governor on .213 ICS leak

Ever since I flashed the 213 leak, battery life has been a bit disappointing. To help things along, I downloaded SetCPU (haven't used it since my good ole OG Droid) and let it autodetect settings. To my surprise the governor was set to 'interactive' instead of hotplug like it was on stock GB.
My understanding is that hotplug allows the phone to disable unneeded cores during periods of low utilization, while interactive does not (although both cores can be disabled when the phone is sleeping). Do you think switching to hotplug from interactive will improve battery life?
My battery life is much better since switching, but I also disabled 4G (on WiFi most of the time) and added screen off and low battery profiles (600mhz and 800mhz max respectively) which muddy the waters a bit. I thought I would mention it on here for those of you who feel the same, it might be an easy way to improve battery life on the leak.

That's interesting. I've been using the .213 leak and my battery life has been quite good. I haven't noticed any particular drop in battery life, and I keep 4G on all the time. If I don't use my phone much, it's not uncommon for me to have 60% left at the end of the day.

Do you use anything like SetCPU? I am wondering whether I can confirm that the default governor of the leak does not shut off one of the CPUs when it is idle. If nobody can confirm I'll get around to checking it myself this weekend :laugh:

Sorry, I haven't messed with my cpu settings.

how much does the governerr really effect the battary?

im just wondering how much does the governerr effect battary life? i changed from ondemand to smartass2 and im not sure i see any diffrent...
and im scheduales which one is best for multitasking and which is for when playing games?
and should i change the governerr setting?
i also read that sleep_ideal_frequency should be 200 and not 100 beacuse 100 wastes more or something like that, is that true?
using galaxy i9000 semaphore kernal jb

bump

I use Performance governor all the time for 3 months now, battery life is same as on demand, smartass v2 or any other governor, except my phone lags much rarely than on any other govenor. For those that dont know, CPU of PC, your phone, calculator or anything else always works at 100% of its frequency even it has no work to do (Let's take for example your PC, even cpu usage is 5%, CPU still works at full frequency, the same works for your phone), so to me there is no point of any other governor except for Performance. If you have problem with battery life, it's mostly your screen. When I drain out my battery, my battery mostly get drained by screen (70-90%), I use about 0-30% of brightness always. Screen of 60-100% brightness will probably drain your phone's battery in 2-3 hours.

Lavoslav said:
I use Performance governor all the time for 3 months now, battery life is same as on demand, smartass v2 or any other governor, except my phone lags much rarely than on any other govenor. For those that dont know, CPU of PC, your phone, calculator or anything else always works at 100% of its frequency even it has no work to do (Let's take for example your PC, even cpu usage is 5%, CPU still works at full frequency, the same works for your phone), so to me there is no point of any other governor except for Performance. If you have problem with battery life, it's mostly your screen. When I drain out my battery, my battery mostly get drained by screen (70-90%), I use about 0-30% of brightness always. Screen of 60-100% brightness will probably drain your phone's battery in 2-3 hours.
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This is so wrong its a pain to read.:banghead: Why do we have the max and min frequency options in the semaphore app? Why do we have "Max Performance" and "Max Battery" power settings on laptops?
Sent from my GT-I9000

There was a thread some while ago that concluded in OnDemand and Performance being to two to give longest battery life and best performance.
I don't have specifics or even a link, but the thread was about schedulers and governors and which went together for best performance and battery life. I'm sure it's google'able
Sent from my GT-I9000 using xda premium

i found that thread but im just wondering how much battary life is wasted if i prefer preformence?
lets say i use smarassv2 since its faster will my phone drain lets say insted 20%\hour - 22%\hour? or is it more then that?

itzikd1 said:
i found that thread but im just wondering how much battary life is wasted if i prefer preformence?
lets say i use smarassv2 since its faster will my phone drain lets say insted 20%\hour - 22%\hour? or is it more then that?
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maybe you can try and tell us

There should be a significant impact regarding battery life when using Performance for example. But it also depends on what you are used to. If you play games all the time or do heavy tasks, the governor will kick the CPU to 100% all the time anyway. But if you mostly surf on the Internet or read texts there's no need to let the CPU go rampage.
Oh and Btw: Modern CPUs in notebooks or computers in general clock themselves down as well when they're idle.
Sent from my Gameboy Color

BlueFlame4 said:
There should be a significant impact regarding battery life when using Performance for example. But it also depends on what you are used to. If you play games all the time or do heavy tasks, the governor will kick the CPU to 100% all the time anyway. But if you mostly surf on the Internet or read texts there's no need to let the CPU go rampage.
Oh and Btw: Modern CPUs in notebooks or computers in general clock themselves down as well when they're idle.
Sent from my Gameboy Color
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I do use internet mostly so what will be the most effective governerr any idea?

itzikd1 said:
I do use internet mostly so what will be the most effective governerr any idea?
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Try OnDemand or SmartAssV2.

[Q] Nexus 6 problems: display, battery

I've received Nexus 6 from FlipKart, Its great but two major concerns:
1. Screen is very yellow (warm color) and on reducing brightness it becomes magenta. When compared to any other phone including Nexus 5, its extremely yellow. Tried couple of apps, none of them do a good job of fixing the yellows. Did anyone find a good app/setting to calibrate this screen right?
2. Battery life is pathetic: From 100% to 10% in half day. SOT is barely 3 - 3.5 hours (Greenified Facebook, Encryption off), no gaming, where as my friend gets 5hours. Sometimes phone hangs and switches off. When I switch on, it looses 15% battery. It has only been charged 2-3 times (only got it 2 days ago). Does it get better with time? or Am I having a faulty battery?
Update: forgot to mention my phone shuts down at 28% battery. And it didn't boot at all. I realized battery was zero. Is this calibration issue? Or bad battery

Flash elementalx, you'll be able to change color values and battery life is great

1. You can change your RGB using any kernel with support to it. Almost every single kernel have support to RGB LCD KCAL. Use a app such as Trickster to modify the RGB once you flashed a kernel of your choosing.
2. Battery life is subjective to how you use your device. Just because someone was able to achieve 5 hours+ SOT doesn't mean you will either because there are way too many factors that play into effect such as: cellular signal strength, wakelocks, apps installed, etc. If you want to maximize your battery life, look into underclocking the CPU/GPU frequency and flash a custom kernel (e.g. Franco) that removes mpdecision. Mpdecision is a huge battery drain and the frequencies that it selects is completely random and unnecessary in my opinion.
http://forum.xda-developers.com/showpost.php?p=57808725&postcount=7 my battery life with Franco pre-r1.

I agree that mpdecision really does drain battery a lot. I have mine OVERCLOCKED to 2.88 ghz with sensei kernel and intelliplug. And I am still getting way better battery life than stock. Just flash this kernel with intelliplug and there goes your battery issues. And you can also adjust your screen colors.

rmx36 said:
I agree that mpdecision really does drain battery a lot. I have mine OVERCLOCKED to 2.88 ghz with sensei kernel and intelliplug. And I am still getting way better battery life than stock. Just flash this kernel with intelliplug and there goes your battery issues. And you can also adjust your screen colors.
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For more elaboration on mpdecision,
All Qualcomm based phones have Qualcomm prorprietary userspace binary called "mpdecision" aka m(ake)p(oor)decision. Instead of letting the kernel itself to decide what frequencies and how many cores to run, this "mpdecsion" binary polls the kernel run queue statistics and decides for the whole system the "optimal" frequency and the "optimal" number of cores to use. The concept is fine, except the decision making is done in userspace and it's 100% closed source so there's no way to tweak it and there's a latency (because all userspace binaries needs to "poll" the kernel for the latest information which is slightly delayed). - faux123
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In other words, mpdecision makes your phone sit at 1.5GHz for doing the most simplest tasks, even composing a email it'll bring your frequency to be at 1.5GHz.
Download CPU Spy and use your phone, then look at CPU Spy and you'll see how much time is spent in that frequency. Then flash another kernel that does not use mpdecision then you'll see the difference, the phone sits at frequencies that makes sense for the load that is on the device.
The alternative solutions would be, Franco's Hotplugging Algorithm or intelliplug by Faux.

Battery life is very subjective.
I am still 100% stock, encrypted, auto brightness and get over 6 hours SOT every charge. Mainly WiFi, some LTE. No gaming.
I will root and switch to another kernel when I have time and see the difference. I would expect more battery.
However if you are only at 2.5 hours SOT on a full charge, I wouldn't expect it to double just by changing kernels.

JasonJoel said:
Battery life is very subjective.
I am still 100% stock, encrypted, auto brightness and get over 6 hours SOT every charge. Mainly WiFi, some LTE. No gaming.
I will root and switch to another kernel when I have time and see the difference. I would expect more battery.
However if you are only at 2.5 hours SOT on a full charge, I wouldn't expect it to double just by changing kernels.
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Thats so impossible. I've switched to 2G only but i run on Wifi all time and yet 1 day standby and 3.5hrs SOT.

zephiK said:
1. You can change your RGB using any kernel with support to it. Almost every single kernel have support to RGB LCD KCAL. Use a app such as Trickster to modify the RGB once you flashed a kernel of your choosing.
2. Battery life is subjective to how you use your device. Just because someone was able to achieve 5 hours+ SOT doesn't mean you will either because there are way too many factors that play into effect such as: cellular signal strength, wakelocks, apps installed, etc. If you want to maximize your battery life, look into underclocking the CPU/GPU frequency and flash a custom kernel (e.g. Franco) that removes mpdecision. Mpdecision is a huge battery drain and the frequencies that it selects is completely random and unnecessary in my opinion.
http://forum.xda-developers.com/showpost.php?p=57808725&postcount=7 my battery life with Franco pre-r1.
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Impressive! I'm trying ElementalX kernel right now. Is it safe to switch-off MP-decision on that using trickster or shall I go with franco blind folded.

taranfx said:
Thats so impossible. I've switched to 2G only but i run on Wifi all time and yet 1 day standby and 3.5hrs SOT.
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Well, not impossible as it has been that way on my phone since day 1.
But i agree that it is really odd how some people are getting 3 hours and others getting 6.
I had the opposite on my Note 4 though. Everyone got 6 and I got 4. So who knows?

taranfx said:
Impressive! I'm trying ElementalX kernel right now. Is it safe to switch-off MP-decision on that using trickster or shall I go with franco blind folded.
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You only want to disable MPDecision if theres a alternative. For Franco, mpdecision is 100% removed so you don't need to disable anything.
I don't know ElementalX so I can't say, ask in their thread. If you use Franco, everything is done for you and you don't need to do anything on your part.

My battery life with LK is pretty good as well! I was able to tether for 10 hours straight and still had 22% left after sleeping ~8 hours.

Setting the right CPU maximal/minimum frequency for better battery life

I'm totally a rookie for modify the kernel, but i wish to get better battery life for my nexus 6. So i read often that changing the CPU Maximal/Minimum Frequency - for example for the franco.kernel or Lean Kernel or other kernel - almost everybody get a better battery life and no wake locks. At the moment i use the nexus 6 stock with no custom software, but the battery life isn't very good.
My questions now: How can i setting the right CPU Maximal/Minimum Frequency for the franco.kernel or Lean Kernel or other Custom Kernel? Are there specific apps? And the most important question: Which are the right numbers to set for the CPU Frequency?
Thanks. :good:

Erdiou said:
I'm totally a rookie for modify the kernel, but i wish to get better battery life for my nexus 6. So i read often that changing the CPU Maximal/Minimum Frequency - for example for the franco.kernel or Lean Kernel or other kernel - almost everybody get a better battery life and no wake locks. At the moment i use the nexus 6 stock with no custom software, but the battery life isn't very good.
My questions now: How can i setting the right CPU Maximal/Minimum Frequency for the franco.kernel or Lean Kernel or other Custom Kernel? Are there specific apps? And the most important question: Which are the right numbers to set for the CPU Frequency?
Thanks. :good:
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first off, questions go into the q&a/help threads, not general. and there are many cpu control apps to use, some free, some paid. thats the way for you to setup your cpu anyways you feel like. and there is no such thing as the right numbers, you need to find the right numbets for your use. me, i overclock to 3033mhz, and still see 5.5-6.5 hours of sot.

Thank you!

You shouldn't necessarily change the minimum and maximum frequencies because they won't necessarily save you battery.
When you look at the mex frequency of 2650 MHz, that's how many clock cycles there are per second. 2,650,000.
Every task you do on your phone will complete within an amount of clock cycles. Let's make some things up to illustrate this. Let's pretend that it takes Facebook app 5,000, 000 clock cycles to open. That means it would take nearly 2 seconds. If you set your Mac CPU frequency to half of stock, that app is going to take twice the time to open. The question is, will running running at 1267 MHz for 4 seconds use less energy than 2650 MHz for 2 seconds?
Looking at the voltage table for elementalx, the stock voltages are 890mV and 1110mV so it seems to me that since the voltage for half the max frequency is a lot higher than half the voltage of max frequency, running a task for twice as long would use more energy than max.
Surely, there will be tasks that take significantly fewer cycles than max frequency, so in those instances it may seem a bit more balanced, but its one of those things you're going to have to just try for yourself. Some people seem to get better battery though personally I'm not tempted.

Thank you, too! Now i understand.
Should I flash only the Lean Kernel or franco.Kernel and then look again at the battery life? Is this enough to get a better battery life on my device?

Erdiou said:
Thank you, too! Now i understand.
Should I flash only the Lean Kernel or franco.Kernel and then look again at the battery life? Is this enough to get a better battery life on my device?
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no. kernels generally wont give you better battery life, but they can help you. battery life is dependent on how you use your device, how you set up your device, what apps you installed and use, your brightness, and the quality of your phone/data connection. and much more other things that weigh in less then these on nattery life.
some apps you install can be badly written, and take lots of battery, even though you rarely use. dropping brightness can increase your battery life. i keep my brightness below 15% usually. if i raise it to 35-40%, ill see a whole hour less screen on time.

What are your CPU Settings?

Hey, was just wondering what settings you all have under Kernel Auditor in order to ensure 5 hours+ SOT. I personally have a dual core setup and have the other two cores kick in when the load gets to 90%, but this seems sort of sluggish now and I only get about 3.5-4 hours SOT and I don't play any games; just simple browsing and productivity. Others manage to get up to 5-6 hours SOT and I wonder how, I have NEVER been able to get this much. Standby is great though, 10 hours overnight and I lose only 3% battery. I am running on Pure Nexus Project ROM and latest Hells Core Kernel.

thats about the regular time I get outa mine. If I had to guess a lot of these 5+ hours are from watching videos or something that doesn't involve touching the screen. I've been using HC kernel with just zen decision on max performance settings and gpu on performance governor (since it idles 27mhz anyway might as well ramp up to full 600mhz for touches) for smoothness.

I have it setup that all my cores are on all the time, no hotplugging. ondemand/deadline, mpdecision disabled, fsync disabled. and I get 5+ hours sot every single day. no, I do not watch videos. but I do keep my brightness all the way down.

Hey, where do you go to disable fsync

aroy97 said:
Hey, where do you go to disable fsync
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it has to be an option in the kernel that youre using, at least the kernel has to expose it so that you can disable it. if its not xposed in general, then you cant disable it. im using despair kernel.

Try undervolting. Unless you severely under clock your cores you won't really see battery life improvement.
I keep my max CPU speed at 2803mhz. You might think "oh well if you're running higher frequencies then more battery drain". Not exactly. The difference between 2649mhz and 2803mhz will be negligible in terms of battery life so I'm seeing a slight performance increase with no significant battery loss. For example, on 2649mhz after a full day of normal usage I'd have about 49% battery life. On 2803mhz I'd have about 43%. I got a good performance increase and a more snappier device in terms of loading web pages, apps, opening documents etc so that extra 6% I lost doesn't matter to me, because its not significantly impacting me, I barely notice most of the time.
So yeah, the same goes for lowering CPU speeds to unless you significantly lower them. Putting max CPU speed to something like 2572mhz, you wouldn't even notice e the difference in battery. Now lowering it to like 1958mhz, or 2188mhz and you'll see a difference because at that point your severely under clocking.
You could also be draining your battery by hotplugging. That's why some people like Zen and MP Decision to keep all cores online when screen is on. If you use your device often, its better to have all cores running. If you don't and its kept in your pocket for hours at a time, hotplugging is the way to go.
Try under volting too. I do. Global Under Volt of -60.

TransportedMan said:
Try undervolting. Unless you severely under clock your cores you won't really see battery life improvement.
I keep my max CPU speed at 2803mhz. You might think "oh well if you're running higher frequencies then more battery drain". Not exactly. The difference between 2649mhz and 2803mhz will be negligible in terms of battery life so I'm seeing a slight performance increase with no significant battery loss. For example, on 2649mhz after a full day of normal usage I'd have about 49% battery life. On 2803mhz I'd have about 43%. I got a good performance increase and a more snappier device in terms of loading web pages, apps, opening documents etc so that extra 6% I lost doesn't matter to me, because its not significantly impacting me, I barely notice most of the time.
So yeah, the same goes for lowering CPU speeds to unless you significantly lower them. Putting max CPU speed to something like 2572mhz, you wouldn't even notice e the difference in battery. Now lowering it to like 1958mhz, or 2188mhz and you'll see a difference because at that point your severely under clocking.
You could also be draining your battery by hotplugging. That's why some people like Zen and MP Decision to keep all cores online when screen is on. If you use your device often, its better to have all cores running. If you don't and its kept in your pocket for hours at a time, hotplugging is the way to go.
Try under volting too. I do. Global Under Volt of -60.
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undervolting doesnt really save you battery, but it does reduce heat. and hotplugging or having all your cores on doesnt really factor in when you dont use your device that much. as, if you have all your cores on or hotplugging, your phone should be in deep sleep anyways. it does make a difference when your phone is awake. i get much better battery life when all my cores are on all the time.

Should there be a sticky of suggested settings of differing requirements of speed, battery life, etc?

ronaldheld said:
Should there be a sticky of suggested settings of differing requirements of speed, battery life, etc?
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honestly, I don't think so. as the settings/setup used is always dependent on how you actually use the device. and many people have different opinions on how it should be set up.