Spreadsheet of Governor Power Use
BENCHMARK DATA
Summary
Out of the five most popular governors (ondemand, conservative, smartassV2, lazy, and lulzactiveV2) which one can save the most battery?
Total power use is calculated from the mA drain at the frequency x the %age of time spent at that frequency. mA drain figures available here.
Best Power Saving Governors
Best for Screen ON: Ondemand
Best Screen ON + performance: SmartassV2
- Good choice if you need a performance governor with some power saving
- SmartassV2 is also the winner of the governor benchmark: here.
What about when my Screen is OFF?
Best Governor for Screen OFF
Without Deep Idle: Same as Screen ON > Ondemand
With Deep Idle: Any governor...
...now it get's technical...
...Why 'any'? If you look at the spreadsheet, on average, with music ON and the screen OFF, the difference between the best (smartassV2) and worst drain (lazy) is 0.05mA (a tiny amount). Harrb already did a 10 hour test to establish how much each governor drains the battery while using deep idle:
Harbb's spreadsheet
Here's two of Harbb's results (phone's own stats for battery drain with matr1x):
- 23% - Lazy with DI
- 15% - SmartassV2 with DI (35% more efficient)
And my results (mA drain using matr1x):
- 0.30mA - Lazy with DI
- 0.24mA - SmartassV2 with DI (20% more efficient)
Harbb's result is the most reliable, as my original battery drain mA readings were all somewhat approximated due to the difficulties of reading accurately off a small scale on the analogue amp meter, especially when the scale is logarithmic and the mA drain is in the lower register. This means, if I assume my Smartass mA reading is correct, then my Lazy reading should be 0.405mA
While playing music, with the screen off, with DI enabled,
over a period of 1 hour:
a constant drain of 0.240mA = 864mA
a constant drain of 0.405mA = 1458mA
So choosing SmartassV2 over Lazy would prevent about 600mA being wasted in one hour. To put this in context, that is enough to power your screen for 3 seconds (assuming a drain of 200mA).
Since it will take about 3 seconds to change your governor, in practice, it would be a waste of effort to bother. Pick your preferred governor for screen ON, and don't worry about what happens while the screen is off (again, only if you have deep idle. If you don't, but want some power savings with the screen off, choose ondemand).
F.A.Q.
[Q] But Harbb's data clearly shows that the battery drain is much better under smartassV2. How can you say governor choice doesn't make a difference?
[A] Harbb's result is an 8% benefit over ten hours, so in one hour it's a 0.8% benefit. It's not a very practical amount.
For more battery saving tips, see my battery drain thread: here.
Where did the other benchmarks go?
Battery Drain Benchmarks: this thread
All ICS ROM Benchmarks: this thread
Kernel Features and Benchmarks: this thread
CPU Governors and I/O Schedulers: this thread
These tests were based on an the procedure first used by XDA user glennkaonang. Credit and thanks to Glenn. Thanks to r_data, mathkid95, steve.garon, and eugene373 for their kernels.
Conservative is not the Best
When the screen is ON, i.e. the phone is in active use. Generally Conservative does not save power. This is because most developers have included a tweaked version of conservative that keeps the frequency at its highest state for longer to improve the responsiveness.
There is one exception where conservative saves more power than other governors, and that is when the screen is off, music is on, deep idle is on, and this only applies specifically to Air Kernel. However, we are talking about a tiny amount of power (for more detail, see the first post.)
PLEASE NOTE: Steve Garon does not include deep idle, but is working on it, neither does Eugene, but I've asked him to consider it. For these two kernels, if you are listening to music with the screen off, currently, the best power saving governor is Ondemand.
Governor Parameters per Kernel
SG-NS-ICS (11th FEB TEST VERSION)
-Conservative
Sampling Rate: 40000
Up Threshold: 80
Down Threshold: 20
Ignore Nice Load: 0
Freq Step: 5
Sampling down factor: 1
-Ondemand
Sampling Rate: 40000
Up Threshold: 95
Ignore Nice Load: 0 (settable in SetCPU)
Powersave Bias: 0
Sampling down factor: 1
-SmartassV2
Awake ideal freq: 800000
Sleep ideal freq: 100000
Sleep wakeup freq: 99999999
Min CPU load: 25
Max CPU load: 50
Ramp down step: 256000
Ramp up step: 256000
Down rate: 99000
Up rate: 48000
-LulzactiveV2
Inc CPU load: 60
Pump up step: 1
Pump down step: 1
Screen off min step: 3 @400
Up sample time: 20000
Down sample time: 40000
MAT1X v17.0
-Conservative
Sampling Rate: 40000
Up Threshold: 80
Down Threshold: 20
Ignore Nice Load: 0
Freq Step: 5
Sampling down factor: 1
-Ondemand
Sampling Rate: 40000
Up Threshold: 95
Ignore Nice Load: 0 (settable in SetCPU)
Powersave Bias: 0
Sampling down factor: 1
-SmartassV2
Awake ideal freq: 768000
Sleep ideal freq: 245000
Sleep wakeup freq: 99999999
Min CPU load: 25
Max CPU load: 50
Ramp down step: 256000
Ramp up step: 256000
Down rate: 99000
Up rate: 48000
-LulzactiveV2
Inc CPU load: 60
Pump up step: 1
Pump down step: 1
Screen off min step: 5 @400
Up sample time: 20000
Down sample time: 40000
ICUP SPEEDY-7
-Conservative
Sampling Rate: 39062
Up Threshold: 70
Down Threshold: 30
Ignore Nice Load: 0
Freq Step: 5
Sampling down factor: 1
-Ondemand
Sampling Rate: 30000
Up Threshold: 95
Ignore Nice Load: 0 (settable in SetCPU)
Powersave Bias: 0
Sampling down factor: 1
-SmartassV2
Awake ideal freq: 800000
Sleep ideal freq: 100000
Sleep wakeup freq: 99999999
Min CPU load: 25
Max CPU load: 50
Ramp down step: 256000
Ramp up step: 256000
Down rate: 99000
Up rate: 48000
-LulzactiveV2 (not settable in NSTools, checked /sys/devices/system/cpu/cpufreq/lulzactive/)
Inc CPU load: 90
Pump up step: 4
Pump down step: 1
Screen off min step: 6 @400
Up sample time: 10000
Down sample time: 40000
AIR KERNEL 3.0 (TEST VERSION)
-Conservative
Sampling Rate: 20000
Up Threshold: 60
Down Threshold: 20
Ignore Nice Load: 0
Freq Step: 5
Sampling down factor: 1
-Ondemand
Sampling Rate: 40000
Up Threshold: 95
Ignore Nice Load: 0 (settable in SetCPU)
Powersave Bias: 0
Sampling down factor: 10
-SmartassV2
Awake ideal freq: 800000
Sleep ideal freq: 100000
Sleep wakeup freq: 99999999
Min CPU load: 25
Max CPU load: 50
Ramp down step: 256000
Ramp up step: 256000
Down rate: 99000
Up rate: 48000
-LulzactiveV2
Inc CPU load: 60
Pump up step: 1
Pump down step: 1
Screen off min step: 5 @400
Up sample time: 20000
Down sample time: 40000
The I/O Scheduler Selections
I selected the likely/proven best I/O scheduler for each kernel and governor combination, based on my previous work here: http://goo.gl/iJXWI
-SG-NS-ICS and Matr1x
Conservative: cfq
Ondemand: noop
SmartassV2: noop
LulzactiveV2: deadline
Lazy: deadline
For these two it's a little different in places:
-ICUP Speedy-7
Conservative: cfq
Ondemand: deadline*
SmartassV2: deadline*
LulzactiveV2: cfq*
Lazy: deadline
-Air Kernel
Conservative: deadline*
Ondemand: noop
SmartassV2: sio*
LulzactiveV2: noop*
Lazy: deadline
I've emboldened and marked with an * where the differences are.
UPDATE: Summary now includes more detail.
I was unable to complete the necessary details and caveats when I first opened the thread as I desperately needed sleep! Hopefully someone can check over my conclusions and make sure they all add up.
bedalus said:
UPDATE: Summary now includes more detail.
I was unable to complete the necessary details and caveats when I first opened the thread as I desperately needed sleep! Hopefully someone can check over my conclusions and make sure they all add up.
Click to expand...
Click to collapse
Awesome Benchmark again bedalus. Very instructive
I would add these points to the conclusions:
- There is a big difference in governors power consumption when screen is on (more than 10 mA between the best and the worst against a small 0.05 mA difference when screen is off)
- Conservative is the worst governor for screen on usage according to the benchmarks (Taking this point with reserves because conservative was tweaked by kernel developers).
- If we have a high "screen on" usage, onDemand will save us so much power
- If we have a low "screen on" usage, it should be better using SmartassV2 and have the best performance for the little time we use the phone
Waiting for your feedback on this bedalus.
Bedalus is loving benchmarking too much that sometimes, he tries to benchmark his benchmarks
tchaari said:
Awesome Benchmark again bedalus. Very instructive
I would add these points to the conclusions:
- There is a big difference in governors power consumption when screen is on (more than 10 mA between the best and the worst against a small 0.05 mA difference when screen is off)
- Conservative is the worst governor for screen on usage according to the benchmarks (Taking this point with reserves because conservative was tweaked by kernel developers).
- If we have a high "screen on" usage, onDemand will save us so much power
- If we have a low "screen on" usage, it should be better using SmartassV2 and have the best performance for the little time we use the phone
Click to expand...
Click to collapse
0.05mA difference: good point. I should probably mention that in the OP.
Yeah, conservative sucked pretty badly on all four of the kernels. Weird.
For me, all I do now is use my phone to check XDA, and I don't use it with the screen off, so I can save power with ondemand. But smartassV2 is provides a very smooth experience. What do I want more? Battery life or smoothness? Hmm... decisions, decisions...
EDIT: Just noticed your benchmark benchmark idea. Only if I am not sleeping.
bedalus said:
0.05mA difference: good point. I should probably mention that in the OP.
Click to expand...
Click to collapse
If you found that the last two points are useful, can you also integrate them in the OP too?
bedalus said:
Yeah, conservative sucked pretty badly on all four of the kernels. Weird
Click to expand...
Click to collapse
Yes it was a surprise to me too but when joining your benchmark results and the theoretical basics of conservative, it all makes sense. Conservative is taking too much time to compute a task (scaling up slowly). It also scales down too slowly when finishing. This is noticeable especially in discontinued use like browsing.
bedalus said:
For me, all I do now is use my phone to check XDA, and I don't use it with the screen off, so I can save power with ondemand. But smartassV2 is provides a very smooth experience. What do I want more? Battery life or smoothness? Hmm... decisions, decisions...
Click to expand...
Click to collapse
I don't think that you can "feel" the performance difference between ondemand and smartassV2 in such tasks. it should be better to stick to ondemand in this case I think
Yeah, testing ondemand now, back on slim ics, feels the same as smartass.
I'll look at the OP tomorrow, early night for me today.
kernels ; battery ; ROM ; gov/sched
bedalus said:
Yeah, testing ondemand now, back on slim ics, feels the same as smartass.
I'll look at the OP tomorrow, early night for me today.
Click to expand...
Click to collapse
I hope you will sleep smoothly now that this benchmark is finished
Can you indicate what schedulers you use for each of the governors? In my experience schedulers also have an effect to battery life so it'd be good to see whether they're the same or different.
nice work.. AGAIN
so this explains why im happiest with ondemand.
deetailed said:
Can you indicate what schedulers you use for each of the governors? In my experience schedulers also have an effect to battery life so it'd be good to see whether they're the same or different.
Click to expand...
Click to collapse
You could visit bedalus' other benchmark thread http://forum.xda-developers.com/showthread.php?t=1478418&page=1 and see which fits your taste best.
Anyway, great job on this new benchmark thread, bedalus.
I can't believe that you would actually go further on this.
Looking at your results, the best for me would be ondemand.
I rarely used my phone, only for messaging and XDA-ing , so most of the time the screen is off.
And as tchaari said, I couldn't see any difference between ondemand and smartassV2 in terms of performance.
Once again, thanks bedalus
Frankly, I thought everything that could be benchmarked already was. However, this data proves even more useful! Thanks, bedalus.
Now there is nothing left to tweak on my phone!
AeroEchelon said:
Frankly, I thought everything that could be benchmarked already was. However, this data proves even more useful! Thanks, bedalus.
Now there is nothing left to tweak on my phone!
Click to expand...
Click to collapse
There is ALWAYS more to tweak on our phones
Good work bedalus, your lack of sleep truly amazes me. I think we can enhance this a bit more by messing around a little with modified conservatives though. It shouldn't be very difficult at all to scale it down far quicker. I'm doing a couple of usage tests with various conservative settings and will let you know if i get any setups that may fit the bill.
As we know, conservative can easily give better performance than ondemand if told to, but i reckon we can get the best of both worlds. Does anyone know where i'd be looking to find the defaults of each governor in the kernel source? Saves me kernel crackflashing.
deetailed said:
Can you indicate what schedulers you use for each of the governors? In my experience schedulers also have an effect to battery life so it'd be good to see whether they're the same or different.
Click to expand...
Click to collapse
To save me trying to copy and paste on my phone this early on the morning, just follow the link below to gov/sched and you'll see a summary in the first post about which scheduler goes best with which governor, e.g. ondemand and noop.
kernels ; battery ; ROM ; gov/sched
simms22 said:
nice work.. AGAIN
so this explains why im happiest with ondemand.
Click to expand...
Click to collapse
Does morfic tweak on demand, I can't remember, I think I read it somewhere... ?
For completeness, and to save Harbb from becoming an emaciated crackflasher like us, I might just go through all the governers for each kernel I tested and note their settings down in the third post.
bedalus said:
To save me trying to copy and paste on my phone this early on the morning, just follow the link below to gov/sched and you'll see a summary in the first post about which scheduler goes best with which governor, e.g. ondemand and noop.
kernels ; battery ; ROM ; gov/sched
Click to expand...
Click to collapse
I think he was asking which scheduler you used with this benchmark. I'd bet it's deadline.
edit: bedalus, at least give me a couple of kernels to do and i'll note them down. You've had enough fun
bedalus said:
To save me trying to copy and paste on my phone this early on the morning, just follow the link below to gov/sched and you'll see a summary in the first post about which scheduler goes best with which governor, e.g. ondemand and noop.
kernels ; battery ; ROM ; gov/sched
Click to expand...
Click to collapse
Ah, I don't mean to ask what scheduler is recommended for each governor (because I've already got that info from your gov/sched thread ). Like Harbb said, I'm just asking that the specific scheduler used in this battery-saving benchmark is mentioned, whether you use the recommended for each or use the same scheduler for all of them (also I'm a she, not he ). Every phone is different and usage habits vary too, so I like to replicate the setup of benchmark winners to see if what you find best is best for me too.
My apologies deetailed. At least i got something right
As i said before, it is most likely deadline that was used since it has very uniform capabilities with each governor. Clarification would definitely be nice though, lack of sleep can do weird things.
tchaari said:
I don't think that you can "feel" the performance difference between ondemand and smartassV2 in such tasks. it should be better to stick to ondemand in this case I think
Click to expand...
Click to collapse
After repeatedly flashing all the kernels, ROMs, and trying all the governor / scheduler combinations that are possible, I've become attuned to the device. For some people they may 'feel' the difference intuitively, others might imagine a difference. But for me, I've had over ten years of practice in timing tiny fractions of a second, all thanks to sound engineering. For example, I used to add Haas delays to close mic'ed instruments to simulate 'early reflections', giving the psychoacoustic impression of greater depth and imagining to these instruments in the mix. These delays are anywhere from 5ms to 40ms.
For me, smartassV2 will always go from input on the touchscreen to an animated transition virtually instantaneously, but with ondemand, if you are coming from an idle state, there is always a little delay. It's tiny, maybe 100ms, but for a sound engineer, 100ms is a huge gulf.
(If you own a Nexus 5X or 6P and you are too lazy to read the philosophy of this technique, head on down to the 2nd post and pop those values into your kernel manager and be happy. If you own a different device, please read this post in full.)
The Introduction
I'm about to tell you how to get buttery smooth, lag free performance with insanely good battery life, using an old school governor featured in practically every kernel... This tweak is applicable to every phone with any ROM or kernel--stock or custom--that provides the Interactive Governor. :good:
Yeah, yeah... everyone promises good battery with great performance, but who actually delivers? Maybe it isn't as smooth as you want, or maybe it requires something your kernel or ROM don't support. Or maybe the battery life promises just aren't what you expected. There's always some awful compromise. Not here!
This isn't a guide to get 36 hour battery life... provided you never use your phone. That's deep sleep optimization, which is lovely and all, but what good is the phone if you can never use it?! And with the new Marshmallow Doze feature, this strategy is becoming a think of the past. What I'm talking about is 7-14 hour screen on, actual hands-on usage times! Without compromising anything, you can get 7-8 hour screen on usage with regular, no-compromise usage habits: daytime visible screen brightness, both radios on, sync on, network location on, all the regular usage features, the whole kit and kaboodle... all smooth as a baby's butt and snappy as a Slim Jim! (Up to 14+ hours if you can stand minimum brightness and WiFi-only with a custom ROM and other stuff turned off! And this is with stock voltages and full frequency range--you'll likely get even more if you choose to optimize those as well!)
However, it should be noted that this does not apply to gaming, heavy camera use, etc. Anything that is an automatic battery killer in and of itself. There's nothing that can be done about anything that forces the phone to utilize its maximum resources all the time. But you should know that by now. Further, this guide is about optimizing the CPU as much as possible. It does not cover things like eliminating wakelocks so your phone sleeps well, removing unnecessary and battery draining stock apps, keeping your screen brightness down*, and all that stuff that's been covered in other posts ad infinitum. Those optimizations are up to you.
*At least on the Nexus 5X, you shouldn't be turning your screen brightness above about 60%. It should be more than viewable in sunlight at that brightness, and keep in mind that the brightness power requirements increase exponentially, so a 100% bright LCD screen will use about 3.5-4.5x more power than a 60% bright screen. I don't see that fact brought up often, so I thought I'd mention it here.
After a bit of tweaking and experimenting, I developed some settings that provide absolutely incredible battery life, buttery smooth performance, and a lag free experience. And you don't need a fancy governor, or a custom kernel, custom clock rates, or even a Nexus 5X. This will work on any ROOTed phone with the Interactive governor!
So, after writing a (nearly identical) guide for the EvoLTE folks over a year ago, I'm now back to update this information to provide strategies for multi-CPU devices, as well as specific settings for the Nexus 5X you can use right away.
Enough long winded preamble! Let's get down to...
The Nitty Gritty
Before I lay out all the settings so you can blindly enter them into your governor control, I should to explain some of the principals I employed to get the results I did. The primary thing to understand before I do is: little might you know, the settings in the Interactive governor can be tweaked on a clock range basis. That is to say, you can finely control how the governor responds at a variety of clock rates, thus better dictating how it should operate under various loads. This is integral to the configuration, because it means the difference between jumping from the slowest speed to the highest speed under load and sustaining lower clock speeds for tasks that don't really require higher clock speeds.
By default, the Interactive governor will jump from lowest speed to a "nominal" speed under load, and then scale up from that speed as load is sustained. That is lovely, but still too twitchy to provide serious efficiency and power savings. It spends most of its time at 2 or 3 clock speeds and barely hits other clock speeds that are ideal for other tasks or usage patterns.
Instead, what we want to do is configure it to handle different types of loads in different ways. A load suited for scrolling through a webpage is not the same as a load suited for downloading/processing streaming video is not the same as a load suited for snappy loading of an app is not the same as a load suited for high performance gaming. Every kind of load has different tolerances at which their minimal speed is indistinguishable from their maximal speed.
To understand what's best under a variety of tasks, we have to identify two types of load profiles: nominal clock rates and efficient clock rates.
Nominal Clock Rates
Nominal clock rates are the minimum CPU clock rates that perform a given task smoothly and without stuttering or lag. To find the nominal clock rate for a given task, turn on only the first CPU using the Performance governor and turn them both down incrementally until you find the minimum clock rate that works best for what you're trying to do, without introducing hiccups. (If you have a CPU or kernel that hotplugs individual cores, multiply that clock speed by your number of cores.) Keep the 2nd CPU on the Powersave governor with the lowest frequency your kernel supports. (Or turn it off completely if hotplugging allows.)
(Note: If your device supports per-core hotplugging, you might be better off using the old guide to determine your nominal clock rates. The Nexus 5X and all current kernels only support hotplugging entire CPUs, so your results may vary if you use any other device.)
For example, on my Nexus 5X, scrolling (not loading, simply scrolling) through a large webpage smoothly will occur when the first CPU clock rates are no less than 460Mhz. (This is on mine without background tasks taking any CPU. Yours may be different depending on services running, the browser you use, your ROM, kernel, etc.) Thus, the nominal clock rate for scrolling a webpage on my Nexus 5X is 460Mhz.
Efficient Clock Rates
Efficient clock rates are CPU clock rates that are unique in that they are the most optimal frequency given the range of voltage requirements. If you map out the frequency jump and the voltage requirement jump between each of the available clock rates, you will find that occasionally the voltage requirement will jump significantly without the frequency jumping proportionally to the previous differentials. For example, using stock voltages, the EvoLTE's msm8960 chipset clock/voltage ratios jump significantly higher from 702Mhz to 810Mhz than the ratios from 594Mhz to 702Mhz.
Because I cannot find the stock voltages of the Nexus 5X clock speeds, this section is INCOMPLETE! If you know the voltages, please post and I can update this guide to include the 5X's Efficient Clock Rates.
Clock Rate Biases
Using the information provided above, figure out both your nominal clock rates for the tasks you perform most often and your efficient clock rates depending on your kernel/custom voltage settings. For me, since I cannot determine the efficient clock rates, I use the nominal clock rates listed above. For the tasks I generally perform on my phone, my nominal clock rates are as follows:
Idle - 384Mhz
Page Scrolling - 600Mhz
Video - 787Mhz
App Loading - 960Mhz
High Load Processing - 1440Mhz
(Note that you must calculate the values that are optimal for your phone for best battery and performance! Each phone is different because of the ROM, kernel, background tasks, etc!)
With this done, you will want to start the fine tuning phase! Correlate the efficient clock rates with their closest nominal clock rates, similar to below:
(This section of the guide is INCOMPLETE because I do not know the clock rate voltages for the Nexus 5X. If you know these, please post in the comments and I will update the guide!)
Idle - ???Mhz efficient / 384Mhz nominal
Page Scrolling - ???Mhz efficient / 600Mhz nominal
Video - ???Mhz efficient / 787Mhz nominal
App Loading - ???Mhz efficient / 960Mhz nominal
High Load - ???Mhz efficient / 1440Mhz nominal
Keep these handy, as they're going to be necessary for...
The Set Up
Now that we know what are the most efficient nominal clock rates we want to focus on and what the most optimal are for what we want to do, we will start low and scale up as necessary. It's always better to begin with underperforming and tweak the settings upward until we're satisfied with the performance of our target tasks.
In its default state, the Interactive governor has a hair trigger that will raise and lower the clock rates, which means it spends too much time at unnecessary clock speeds, wasting power, and scales down too quickly, leading to stuttering performance. We will take advantage of a seldom used feature of the Interactive governor. Specifically, that with which it determines when it is okay to scale up to each higher clock rate, on a frequency by frequency basis.
We have two primary goals: respond as quickly as possible to each load request for a lag free experience and exceed the desired clock rate for a given task as little as possible. To do this, we will instruct the Interactive governor to trigger certain clock rates in different ways depending on our expected load.
I won't explain all of the settings of the Interactive governor--there are plenty of summaries all around. (Go search now if you don't know what any of the settings for Interactive governor do. I'll wait here.) However, I will explain an incredibly powerful feature of the Interactive governor that is rarely included in those summaries: multiple frequency adjustments.
The above_highspeed_delay setting, for example, defines how long the governor should wait before escalating the clock rate beyond what's set in highspeed_freq. However, you can define multiple different delays that the governor should use for any specified frequency.
For example, we want the above_highspeed_delay as low as possible to get the CPU out of the idle state as quickly as possible when a significant load is applied. However, we don't want it to jump immediately to the fastest clock rate once it's gotten out of idle, as that may be overkill for the current task. Our target trigger (which you will later adjust to suit your system and usage profile), will begin at 20000μs. That means 20,000μs (or 20ms) after our idle max load has been reached, we want to assume idle has been broken and we want to perform an actual task. (We want this value as low as possible without false positives, because it is one of a few factors that determine how snappy and lag free the CPU's response is.)
But at this point we're not ready to take on a full processing load. We may just be briefly scrolling a webpage and don't need the full power of the CPU now that we've allowed it to break out of idle. So we need it to reach a particular frequency and then hold it there again until we're sure the load is justified before we allow it to push the frequency even higher. To do that, rather than just setting
above_highspeed_delay - 20000
we will instead use the format "frequency:delay" to set
above_highspeed_delay - 20000 460000:60000 600000:20000
"Waaaait... What does that do?!"
This tells the Interactive governor to hold out 20ms after our target load when it's at our highspeed_freq (which we're actually using as our idle frequency--not a burst frequency as originally intended), but then it tells the governor to hold for 60ms after it's reached 460Mhz. Once it has exceeded 460Mhz, it then has free reign to scale up without limitation. (This will be optimized with the target_loads setting in a minute. And if you don't know what I'm talking about when I say "highspeed_freq" then you didn't go search for the basic Interactive governor settings and read about it! Go do that before you read any further, because I will not explain the basics of this governor!)
These settings are among the most important, because they limit the phone's clock rates when you are not interacting with it. If it needs to do something in the background, chances are it does not need to run full throttle! Background and idle tasks should be limited to the lowest reasonable clock rate. Generally speaking, if you're just looking at your phone (to read something, for example), you want the phone to use as little CPU power as possible. This includes checking in with Google to report your location or fetching some pull data or... whatever. Things that you don't need performance for.
So now that we know how to specify different settings for different frequency ranges, let's finish it all up with...
The Money Shot
If you've made it this far, you're ready to put these strategies into play! If you have not read the previous sections, DO NOT COMPLAIN IF THE DEFAULT SETTINGS DON'T PROVIDE WHAT YOU'RE LOOKING FOR!! These settings are templates only and these need to be adjusted for each case based on your system and usage patterns! IF YOU ARE NOT GETTING THE PERFORMANCE OR BATTERY LIFE PROMISED, ***READ THE SECTIONS ABOVE!!!***
With that out of the way... let's rock!
If you are using a Nexus 5X, use the following Interactive governor settings for CPU 1 ("little"–the one with 4 cores) and then tweak with the instructions below:
(If you are using a phone other than a Nexus 5X, you must read the above sections and replace the frequencies with your own efficient clock rates!)
above_highspeed_delay - 20000 460000:60000 600000:20000
boost - 0
boostpulse_duration - 80000
go_highspeed_load - 99
hispeed_freq - 600000
min_sample_time - 30000
target_loads - 98 460000:19 600000:80 672000:12 787000:81 864000:9 960000:69 1248000:95 1440000:95
timer_rate - 20000
timer_slack - 80000
These defaults work fine for me, but I have otherwise optimized my system fully, so they are at the minimal adequate values. If you have background tasks that consume any somewhat significant amount of CPU on a constant basis, you will most likely see awful, stuttery performance and poor battery life! So you must adjust them to suit your system before you see results!!! Anything more than about 15-20% idle CPU use at any given time will negatively affect the results you see without further tweaking!
Optimize Idle Frequency
Now that you've got the base configuration, we need to tweak it so that the CPU stays at your efficient idle frequency (384Mhz in this case) without spontaneously jumping when your phone is actually idle. To do this, open a CPU monitor that displays the current core frequencies (I like CoolTool, but you can use what you like as long as it doesn't significantly impact the CPU use--you're best off using a passive monitor and checking the results after 30-60 seconds of no activity), watch the frequencies and see how often they go above your efficient idle frequency when you're not doing anything at all, and adjust the following:
timer_rate - If your idle frequency is not being exceeded much, adjust this downward in increments of 5000 until it is, then increase it by 5000. If your idle frequency is being exceeded often, adjust this upward in increments of 5000 until your CPU primarily stays at or below your desired idle frequency.
above_highspeed_delay - Only if your timer_rate has matched or exceeded 50000 and still won't stay at or below your desired idle frequency most of the time, set timer_rate to 50000 and adjust the "20000" portion of the value upwards in increments of 5000 until the idle frequency has stabilized.
The lower these two values are, the more snappy/lag free your system will be. So try to get them as low as possible without the idle frequency being exceeded too much, as this inversely affects the snappiness and efficiency of your phone when you're not doing anything. Lower = snappier but uses more CPU when you're not doing anything (such as reading a webpage); higher = less snappy but stays in a power saving state more often reducing CPU use when you're not interacting with the device. These are the most critical in determining your idle power savings, so keep that in mind if you want the most battery life!
Enhance Task Responsiveness
Now use the efficiency and nominal clock rate correlations you made for your master clock rate list in the section above and adjust your frequencies to suit your usage patterns. For example, I had web page scrolling as my 600Mhz rate, so I will open a web page and scroll and see how everything feels. If it feels sluggish, I will increase all the references to "600000" in both above_highspeed_delay and target_loads upwards to the next available clock rate until that task is smooth. What you are looking for is constant poor/sluggish performance when the task you're testing for is using its highest CPU use. If the task becomes sluggish/stuttery as it winds down (such as a scrolling webpage slowing to a stop), we will address that next, so do not take that behavior into consideration as you adjust these values! If the task is smooth until (or after) it slows down, then you have reached your optimal clock rate and can move on.
Find Optimal Loads
Now here's where we get a little math-heavy to determine what the optimal target_load frequencies are for each clock rate. (Might want to bust out a spreadsheet to do the math for you if you're not using a Nexus 5X.)
We want to determine 2 values for every available clock rate: the maximal efficient load and the minimal efficient load. To make this determination, we need to bust out our calculators. (Or spreadsheets!)
For the maximal efficient load, we want to correlate a load value no higher than 90% of a given clock rate before it would be more efficient to jump to the next clock rate–to avoid overwhelming a particular rate while avoiding premature jumps to the next. For this value, we calculate it as:
(clock rate * 0.9) / next highest clock rate
For example, the maximal efficient load for 600Mhz on the Nexus 5X would be caluclated as:
(600000 * 0.9) / 672000 = 80.36% (rounded and normalized: 80)
For the minimal efficient load, we want to correlate a load value at which anything higher would be better served by a higher clock rate. To calculate this:
(1 - next highest clock rate / clock rate) * -1
For example, the minimal efficient load for 600Mhz on the Nexus 5X would be calculated as:
(1 - 672000 / 600000) * -1 = 12.00% (rounded and normalized: 12)
For the Nexus 5X, the maximal efficient loads of CPU 1 are:
384000:75
460000:69
600000:80
672000:76
787000:81
864000:81
960000:69
1248000:78
For the Nexus 5X, the minimal efficient loads of CPU 1 are:
384000:0
460000:19
600000:30
672000:12
787000:17
864000:9
960000:11
1248000:30
1440000:15
For the Nexus 5X, the maximal efficient loads of CPU 2 are:
384000:72
480000:68
633000:74
768000:80
864000:81
960000:69
1248000:83
1344000:84
1440000:84
1536000:84
1632000:86
1689000:83
For the Nexus 5X, the minimal efficient loads of CPU 2 are:
384000:0
480000:25
633000:32
768000:21
864000:13
960000:11
1248000:30
1344000:8
1440000:7
1536000:7
1632000:6
1689000:3
1824000:8
Using Optimal Loads
Now, you might be asking, "Why the heck did I do all this math?! WHAT IS IT GOOD FORRRR????!!!!"
Well, we had put some values into target_loads earlier, but those values weren't arbitrary. See, for all of our nominal clock rates, we want the CPU to hang out on them for as long as possible, provided they're doing the job. For each frequency tagged as our nominal clock rate, we want to use the maximal efficient load in target_loads. For every other frequency, we want to use our minimal efficient load value.
We don't care about those other frequencies. We don't want the CPU to hang out in those states for very long, because it just encourages the device to be reluctant to jump to a higher nominal frequency and causes stuttering. We eliminate the desire for the governor to select those frequencies unless it is absolutely efficient to do so. For all the nominal clock rates, we want the CPU to hang out there... but not for too long! So we set those values to the maximal efficient load, so they can escape to the next nominal frequency before they overwhelm the current frequency.
All said and done, this reduces jitter and lag in the device while providing optimal frequency selection for our day-to-day tasks.
Fix Stuttering
Now that you have adjusted your frequencies for optimal high CPU use in each given task, you may notice some stuttering as the task winds down. (Such as a scrolling webpage slowing to a stop.) If this bothers you, you can tweak this at the expense of some (minor) battery life by adjusting min_sample_time up in increments of 5000 until you are satisfied.
If you have exceeded a value of 100000 for the min_sample_time setting and still are not satisfied, change it back to 40000 and increase (and re-optimize) your idle frequency by one step. This will impact battery life more, but less than if you were to keep increasing the value of min_sample_time.
However, this step should not be necessary if you properly calibrated your maximal and minimal efficient loads!
But What About That 2nd CPU?!
So we've all but ignored the 2nd CPU. The reason? It's a horribly inefficient processor designed for high load tasks that generally don't come into play during normal usage patterns. It's good for gaming and image processing, but not for most moderate tasks a user might employ.
But it is good for one thing that all users do pretty frequently... loading and switching apps.
Fortunately, at least for the Nexus 5X, the system is pretty smart about when to employ the power of this inefficient 2nd CPU. So it's generally kept at bay most of the time. What we want is to configure it to be our burst processor–we want it to come into play spontaneously and quickly during tasks that necessitate immediate high loads, like loading and switching apps. To do this, we will ignore all but 3 frequencies:
384Mhz
1248Mhz
1824Mhz
In this case, we configure it just as we did with CPU 1, but only worry about keeping it idle as much as possible, allow it to jump to 1824Mhz immediately when needed, and encourage it to fall back to 1248Mhz if a sustained load is needed.
These values are ideal for the Nexus 5X, so if you have a different phone, choose the lowest clock rate, highest clock rate, and median efficient clock rate, using the instructions previously.
For the Nexus 5X, we'll jump straight to...
The Money Shot: Part Deux
If you are using a Nexus 5X, use the following Interactive governor settings for CPU 2. ("big"–the one with 2 cores)
(If you are using a phone other than a Nexus 5X, you must read the above sections and replace the frequencies with your own efficient clock rates!)
above_highspeed_delay - 20000
boost - 0
boostpulse_duration - 80000
go_highspeed_load - 99
hispeed_freq - 1824000
min_sample_time - 20000
target_loads - 98 480000:25 633000:32 768000:21 864000:13 960000:11 1248000:95 1344000:8 1440000:7 1536000:7 1632000:6 1689000:3 1824000:95
timer_rate - 20000
timer_slack - 80000
What About Bob Touchboost?
Touchboost is a nifty feature in a lot of kernels (including stock on Nexus 5X) that jumps up the frequency so that you experience minimal lag. However, with all the above settings, touchboost is usally detrimental to the efficiency of the device!
We generally want to keep the CPU on the lowest possible frequency as much as possible, and touchboost interferes with that. Further, because we've set up the maximal and minimal efficient clock rates, as well as burst processing from the 2nd CPU core, we don't need touchboost!
If your kernel allows you to shut it off, try to do so and see if the responsiveness of your device is acceptable. On the Nexus 5X, touchboost adds no perceptual performance gain and only hurts efficiency and battery life. If your kernel doesn't allow you to turn off touchboost, try another one, like the excellent ElementalX.
Your battery life will thank you!
The Conclusion
I have achieved unprecedented performance, smoothness, snappiness, and battery life with the default settings I outlined above. However, your mileage may vary, as every phone, ROM, kernel, installed applications, etc are different. This is a very sensitive governor profile and must be tweaked to just meet the requirements of your system and your usage patterns!
If it is not optimally tuned, performance and battery life will suffer! If you're not seeing buttery smooth, snappy performance, you have not correctly tuned it for your system!! However, if you do have superb performance (and you tweaked the values conservatively and not in large steps), then you will also get the aforementioned battery life.
I will be happy to answer any questions, or provide any guidance I can. However:
You must otherwise optimize your phone first! This will not "fix" a poorly optimized system and will, in fact, reduce performance and battery life without further optimization and proper tweaking.
I will not answer questions about "what is a governor?" There are plenty of resources available already, so search for them.
I will not answer questions about "how can I tweak [some other] governor?" This is about the Interactive governor only.
I will not respond to "nuh uh! show proof!" posts. The fact that I spent 12 hours writing this up should be proof enough that I am satisfied with the results. You can take it or leave it; makes no difference to me. The default settings should work with any fully optimized Nexus 5X running ElementalX Kernel, so just try them on your own. If you're not absolutely satisfied (and trust me, either it'll work out-of-the-box with flying colors and you'll know it works for your system, or it'll be an awful experience which means you must tweak it), then you haven't adequately adjusted the settings to suit your system.
Lemme know what you think, and good luck!
"I'm Too Lazy To Read All That! WHAT DO I NEED TO DO?!?!"
If you own a Nexus 5X or 6P, install the ElementalX Kernel and the EX Kernel Manager. (Yes, it works in other kernels, but you're on your own regarding how to set the values. Other kernel editors, such as Kernel Adiutor, are currently buggy and problematic, so your mileage may vary. And if you have another device, you must follow the instructions in this post to derive your own values.)
UPDATE: EX Kernel Manager now supports governor profiles and most currently published profiles are distributed with the manager. To access: EXKM> CPU> Governor options> Load, then select the profile you wish to try! Many thanks to @flar2 for providing native support!
In the "CPU" section, turn off "Touchboost". (This is crucial!! YOU MUST TURN OFF TOUCHBOOST OR ELSE YOU WILL NOT SEE ANY BATTERY SAVINGS!!!) Make sure the "Max CPU Frequency" is set to the maximum possible value for each CPU. Make sure the "Min CPU Frequency" is set to the minimum possible value for each CPU. Then set the following values for each CPU under "Governor options" for each CPU respectively:
CURRENT STABLE – Version 2.0
Nexus 5X - The "Easy Way" Setup - For ElementalX Kernel
CPU #1 (aka "little", aka "has 4 cores", aka "maxes out at 1440Mhz")
target_loads - 75 460000:69 600000:80 672000:76 787000:81 864000:81 960000:69 1248000:78
timer_slack - -1
hispeed_freq - 460Mhz
timer_rate - 20000
above_hispeed_delay - 30000 600000:20000 672000:10000
go_hispeed_load - 75
min_sample_time - 60000
CPU #2 (aka "big", aka "has 2 cores", aka "maxes out at 1824Mhz")
target_loads - 72 480000:68 633000:74 768000:80 864000:81 960000:69 1248000:83 1344000:84 1440000:84 1536000:84 1632000:86 1689000:83
timer_slack - 80000
hispeed_freq - 633Mhz
timer_rate - 10000
above_hispeed_delay - 10000
go_hispeed_load - 72
min_sample_time - 100000
Under "CPU Boost", set "input boost milliseconds" to "0".
Nexus 6P - The "Easy Way" Setup - For ElementalX Kernel
CPU #1 (aka "little", aka "low", aka "maxes out at 1555Mhz")
target_loads - 75 460000:69 600000:80 672000:79 768000:80 864000:81 960000:69 1248000:84 1344000:82 1478000:86
timer_slack - -1
hispeed_freq - 460Mhz
timer_rate - 20000
above_hispeed_delay - 30000 600000:20000 672000:10000
go_hispeed_load - 75
min_sample_time - 60000
CPU #2 (aka "big", aka "fast", aka "maxes out at 1948Mhz")
target_loads - 72 480000:68 633000:74 768000:80 864000:81 960000:69 1248000:84 1344000:84 1440000:84 1536000:85 1632000:85 1728000:85 1824000:84
timer_slack - 80000
hispeed_freq - 768mhz
timer_rate - 10000
above_hispeed_delay - 10000
go_hispeed_load - 72
min_sample_time - 100000
Under "CPU Boost", set "input boost milliseconds" to "0".
(Having trouble applying these? Check out these great scripts from @Alcolawl PLEASE NOTE THAT THESE ARE OFFICIALLY UNSUPPORTED–direct your queries to Alcolawl so he might provide assistance.)
ALPHAS – USE AT YOUR OWN RISK!! (Actually, we really like "GostPepper". Try it out. It's spicy! And don't worry–it won't break anything!)
NEW! GlassFish (For most devices!) - High battery savings with buttery smooth interface!
NEW! HawkTail (6P) - An advanced, modern profile that is both battery efficient and highly performant! All users are urged to check out HawkTail!
Butterfly - A culmination of all strategies, provides smoothest performance of all currently published settings, though battery savings are a little more modest. Excellent for light and moderate users; heavy/marathon users might want to check out a different setting profile.
GhostPepper (6P) - Uses a quantized, frequency-aligned parametric curve to influence low core clock rates while providing extremely smooth transitions from each clock rate and exceptional battery life. The current favorite, albeit not very well tested so far. HIGHLY RECOMMENDED
SilverFish - Effectively eliminates "hispeed_freq" so perceptive scrolling performance is increased, giving the illusion of excellent performance while providing great battery life. Some users experience problems with performance while multitasking--NOT RECOMMENDED FOR EVERYONE. Light users should enjoy this very much, however.
MadDog - The first major departure from the core strategy. Very well tested, extremely stable, and HIGHLY RECOMMENDED if you aren't fully satisfied with v2.0 settings. This is on the table to be the next stable v3.0, so rest assured you can't go wrong with this one!
ARCHIVE
v1.0
Nexus 5X - The "Easy Way" Setup - For ElementalX Kernel
CPU #1 (aka "little", aka "has 4 cores", aka "maxes out at 1440Mhz")
target_loads - 98 600000:80 787000:81 960000:69 1248000:85 1440000:90
timer_slack - 80000
hispeed_freq - 600Mhz
timer_rate - 20000
above_hispeed_delay - 10000
go_hispeed_load - 64
min_sample_time - 80000
CPU #2 (aka "big", aka "has 2 cores", aka "maxes out at 1824Mhz")
target_loads - 90 633000:74 768000:80 960000:69 1248000:83 1536000:84 1689000:90
timer_slack - 80000
hispeed_freq - 1248Mhz
timer_rate - 10000
above_hispeed_delay - 10000
go_hispeed_load - 90
min_sample_time - 80000
Under "CPU Boost", set "input boost milliseconds" to "0".
Nexus 6P - The "Easy Way" Setup - For ElementalX Kernel
CPU #1 (aka "little", aka "low", aka "maxes out at 1555Mhz")
target_loads - 98 600000:80 768000:80 960000:69 1248000:84 1478000:85 1555000:90
timer_slack - 80000
hispeed_freq - 600Mhz
timer_rate - 20000
above_hispeed_delay - 10000
go_hispeed_load - 64
min_sample_time - 80000
CPU #2 (aka "big", aka "fast", aka "maxes out at 1948Mhz")
target_loads - 90 633000:74 768000:80 960000:69 1248000:83 1536000:84 1632000:85 1824000:90
timer_slack - 80000
hispeed_freq - 633mhz
timer_rate - 10000
above_hispeed_delay - 10000
go_hispeed_load - 90
min_sample_time - 80000
Under "CPU Boost", set "input boost milliseconds" to "0".
Changelog:
8/23/16 - Added GlassFish profile
8/16/16 - Added HawkTail profile
1/24/16 - Added instructions to use EXKM's native profiles
1/4/16 - Archived v1.0; elevated "crazy alpha 2" to v2.0 and posted; added links to other alpha settings
12/27/15 - Updated for better performance on 5X and 6P
12/25/15 - Updated to improve battery use on 6P and somewhat on 5X
12/23/15 - Made the beta #2 settings the default; added settings for 6P
FAQ
In this guide, I am using the ElementalX Kernel on the Nexus 5X. If you are using a different kernel or device, your available features may vary, so you must determine the appropriate values to use based on the instructions in this guide! If you are too lazy to do this, I will try to keep a running list of compatible settings you can just plug-and-go. But the purpose of this guide is to assist you in discovering the best values to use with your device, so if something doesn't work, it's because you're probably not following the guide and coming up with your own values! specific to your kernel and device combo! You've been warned!
My settings don't show up after I reboot! What am I doing wrong??
If you are using EX Kernel Manager, tap the power icon to the right of the setting after you set it. If you are using a different kernel manager, check with that developer to see how it's implemented. Also, give the kernel manager a few minutes after the device boots. The settings aren't applied immediately, so check back after 3 minutes and you should see the correct values.
Why is one of my CPUs not letting me change a setting or set a certain frequency?
The device may be thermally throttling and had turned off that CPU or limited it. Turn off your device and let it cool for 5 minutes, then try again. (Keep it unplugged and make sure you don't have any apps running that might be trying to use a lot of CPU while the device is off.)
These settings don't work/I'm not getting great screen on time!
You probably haven't disabled touch boost. YOU MUST DISABLE TOUCHBOOST, OR THIS WON'T SAVE YOU JACK SQUAT!!
How do I change governor/kernel settings?
If you're not comfortable or don't know how to do this, search the XDA forums. There are plenty of guides that explain this in great detail.
My kernel editor won't let me set [whatever]Mhz for a value you showed!
Either you have done something wrong, or you're using a kernel/device combo that isn't ElementalX on Nexus 5X, for which this guide was written. Follow the instructions in the first post to determine the appropriate settings for your own device!
Do I have to be rooted?
Yes. See the fourth question and learn more about your device before trying to change things like governor settings!
been waiting for this since I saw a few posts saying it would be released on r/nexus5x
Thanks!
What program to use to set all these tweaks?
Smultie said:
What program to use to set all these tweaks?
Click to expand...
Click to collapse
I recommend using the ElementalX kernel with the ElementalX Kernel Manager, because it supports all of the features necessary to get the most out of this guide. (Especially turning off touch boost.)
That said, you can try any kernel manager to make these changes. Just search Google Play!
How important is io_is_busy? Can't find that string in the elemental X app.
What are your thoughts, if any, on zram and swappiness values?
soniCron said:
I recommend using the ElementalX kernel with the ElementalX Kernel Manager, because it supports all of the features necessary to get the most out of this guide. (Especially turning off touch boost.)
That said, you can try any kernel manager to make these changes. Just search Google Play!
Click to expand...
Click to collapse
I tried it with Kernel Adiutor, but I noticed that I can't set "hispeed_freq - 600000" on CPU1. Closest options are 480000 and 633600. Which one to choose?
Smultie said:
I tried it with Kernel Adiutor, but I noticed that I can't set "hispeed_freq - 600000" on CPU1. Closest options are 480000 and 633600. Which one to choose?
Click to expand...
Click to collapse
What kernel are you using?
soniCron said:
What kernel are you using?
Click to expand...
Click to collapse
Stock
dg4prez said:
How important is io_is_busy? Can't find that string in the elemental X app.
What are your thoughts, if any, on zram and swappiness values?
Click to expand...
Click to collapse
Sorry, that was inadvertently copied from the old guide. I'll remove it from the post. You can ignore that setting.
Far as zram, I'm not sure, yet. I haven't spent time exploring it on this device. That said, I'm not sure disabling it will improve performance in any noticeable way on this device. With these governor settings, things are screamingly fast, and my concern would be with more apps unloading because of the smaller RAM.
I'll make additional posts as I discover the most reasonable tweaks for this device, but not before I test each methodically and thoroughly...
soniCron said:
Sorry, that was inadvertently copied from the old guide. I'll remove it from the post. You can ignore that setting.
Click to expand...
Click to collapse
I already set it at 0. Should I put it back at 1?
Smultie said:
Stock
Click to expand...
Click to collapse
Would you mind posting all the frequencies available for both CPUs? I'll update the guide to reflect the proper values.
I'm using ElementalX because of its ability to turn off touch boost, so I haven't worked much with the stock kernel.
Thanks!
Smultie said:
I already set it at 0. Should I put it back at 1?
Click to expand...
Click to collapse
Leave it at 0 until I can investigate the stock kernel options.
soniCron said:
Would you mind posting all the frequencies available for both CPUs? I'll update the guide to reflect the proper values.
I'm using ElementalX because of its ability to turn off touch boost, so I haven't worked much with the stock kernel.
Thanks!
Click to expand...
Click to collapse
Big:
Deep Sleep, 384, 480, 633, 768, 864, 960, 1248, 1344, 1440, 1536, 1632, 1689, 1824
Little:
Deep Sleep, 384, 460, 600, 672, 787, 864, 960, 1248, 1440
Also: Stock kernel in combination with Kernel Adiutor allowed me to disable 'Input Boost Frequency Core 1' which I assumed is the same as touch boost. It's described as 'CPU frequency to be boosted to this frequency upon input detection'.
Thanks for your quick replies.
Smultie said:
Big:
Deep Sleep, 384, 480, 633, 768, 864, 960, 1248, 1344, 1440, 1536, 1632, 1689, 1824
Little:
Deep Sleep, 384, 460, 600, 672, 787, 864, 960, 1248, 1440
Also: Stock kernel in combination with Kernel Adiutor allowed me to disable 'Input Boost Frequency Core 1' which I assumed is the same as touch boost. It's described as 'CPU frequency to be boosted to this frequency upon input detection'.
Thanks for your quick replies.
Click to expand...
Click to collapse
Ohhhhh! Okay, I see what's going on! The little CPU is #1 and the big CPU is #2. Reverse your assignments and it should all be fine.
I'll update the post to clarify. (I thought it was a little strange that there would be different clock rates for different kernels. Didn't even think that was possible since it's a hardware feature, not a kernel feature. You had me thinking I missed some major technological advancement! )
soniCron said:
Ohhhhh! Okay, I see what's going on! The little CPU is #1 and the big CPU is #2. Reverse your assignments and it should all be fine.
I'll update the post to clarify. (I thought it was a little strange that there would be different clock rates for different kernels. Didn't even think that was possible since it's a hardware feature, not a kernel feature. You had me thinking I missed some major technological advancement! )
Click to expand...
Click to collapse
Might be a bug in Kernel Adiutor cause I can select the same hispeed_freq for both CPU's (big/little or 1/2).
Also, you state that you want the big CPU to only run at 384, 1248 and 1824 MHz, but I notice it never reaching lower than 633MHz. Are you sure your settings are correct?
Smultie said:
Might be a bug in Kernel Adiutor cause I can select the same hispeed_freq for both CPU's (big/little or 1/2).
Click to expand...
Click to collapse
I made a simplified guide for you (and others):
http://forum.xda-developers.com/showpost.php?p=64279960&postcount=2
I haven't used a kernel manager besides EX Kernel Manager that supports 2 CPUs reliably, so if you're having problems, I suggest you try EX.
If you find one that will modify the stock kernel reliably, please let me know and I'll update the simplified version of the guide to reflect that.
Thanks for your feedback! (And warnings! And concerns!)
Smultie said:
Also, you state that you want the big CPU to only run at 384, 1248 and 1824 MHz, but I notice it never reaching lower than 633MHz. Are you sure your settings are correct?
Click to expand...
Click to collapse
Can you set the minimum clock rate for the big CPU? If that's not possible to set at 384 in stock, I'll update the guide. If it is, then that needs to be done as well.
soniCron said:
Can you set the minimum clock rate for the big CPU? If that's not possible to set at 384 in stock, I'll update the guide. If it is, then that needs to be done as well.
Click to expand...
Click to collapse
In your main guide you state for CPU1:
above_highspeed_delay - 20000 460000:60000 600000:20000
In the "learn to read" guid you state:
above_highspeed_delay - 20000
Which is the correct one?
Also, can't find "Touchboost" under "CPU". Can you be a bit more specific maybe?