Database Users

Legend and SetCPU? (min and max frequency you can achieve?)

Hi all,
Has anyone tried using SetCPU on his rooted legend? I tried on my non rooted one just too have a look at the CPU frequencies, to see how it behaves at idle and so, and while max is 600MHz the min is "only" 480MHz.
Doesn't that sound a bit high for the min frequency? The snapdragon is clocked at 1GHz and idle is 250Mhz. Has anyone tried lowering the idle frequency on the legend to gain some battery life?

Hi Bricolo_fr,
I found this entry in the FAQ of SetCPU documentation fount here (http://www.pokedev.com/setcpu/):
"Why aren't there more speeds to choose from?
The speeds which the CPU can run at is in part a kernel limitation and in part a hardware limitation. Attempting to set the CPU frequency to anything else won't cause any changes in CPU speed. On some devices, the kernel can be modified to enable certain other frequencies. There are other speeds that would be useful, the capabilities of the processor itself often hinders which frequencies are available on a device."

Anybody has the skills for making a kernel change?or some ideas for us being able to use this properly?

Hi,
Today I rooted my legend and tested again SetCPU. At the begining, it was only possible to set CPU from 480 to 600 mhz, but then I red this in SetCPU documentation:
http://www.pokedev.com/setcpu/
--------------
10. Disabling Perflock
On most stock HTC kernels and some custom kernels, HTC has enabled a driver called "perflock" that constantly resets SetCPU's Max and Min settings. This does not apply to mostly "Google experience" HTC devices such as the T-Mobile G1, the myTouch 3G, any Google development device, or the Nexus One. It does, however, apply to "HTC Sense" devices such as the HTC Hero, Droid Eris, HTC Desire, HTC Incredible, EVO 4G, and myTouch Slide. Non-HTC devices never have perflock enabled.
SetCPU can disable perflock on newer HTC kernels, giving you control of the Max and Min settings of the CPU. To do this, press the Menu button on your device in the Main tab and choose "Disable Perflock." Read through the notice and then press the button in the dialog. If successful, you should be able to change the frequency with SetCPU. If this process fails, please e-mail the developer with your kernel version and device so support can be added.
Keep in mind that disabling perflock does not enable overclocking, though some overclocked kernels may require perflock to be disabled. Overclocking, in most cases, requires a custom kernel.
-------------------
So, in the last version of SetCPU there is an option in the menu called "Perflock Disabler" With this option, it is possible to select the minimun frequence to any value from 0 to 600 Mhz.
I have not been able to modify maximun to a value higher than 600 mhz (overclock) but I think the best target is to reduce battery consumtion decresing the minimun mhz value. Actualy I set minimum 128, maximun 600.

so, are you sure you could set it to the minimum of 128? because i think it doesn't work actually...at least without a modified kernel

I got a min at 19 MHz. to 600 Mhz.

casca said:
so, are you sure you could set it to the minimum of 128? because i think it doesn't work actually...at least without a modified kernel
Click to expand...
Click to collapse
Yes. Also confirmed with the app Os Monitor:
-Saling range: 122880-600000
-Frequency range:19200-600000
-Governor: ondemand
-Current: 122880
Software version: unbranded 1.31.405.4 (just rooted with Monodaco method and applyed all OTA updates)
In SetCPU Info:
-Time in state:
19200: 22
122880: 1169071 (Currently I set minimum at 122880)
128000: 0
245760: 269491
480000: 362472
600000: 347583
SetCPU in Legend allows the following governors: userspace, ondemand, and perfromance. Ondemand works fine. Userspace and performance makes extrage things (i tested quickly, to be honest)
I defined several profiles in SetCPU, depending of battery chage, and seems to work fine. But, I did not enable "Set on boot" option in SetCPU and need to activate "Perflock Disabler" in SetcPU menu everytime I reboot Legend (I prefer to test a SetCPU a few days before enabling "Set on boot")

well...this is nice... after disabling the "perflock" option...
I set the minimum value to 19mhz....lol... with "ondemand" management of the cpu...
I think I'have seen a HUGE improvement of the battery...When I mean HUGE, I really mean HUUUUUGE!
Like, for a 12hours use always with 3g data on,and 2 hours of wireless...lost only 30% of battery...
Testing today for more results...

I use the profile manager in SetCpu to set the CPU to 128-256 while screen off, max mhz while charging, etc.
I have seen big improvements.

Yes, battery improvement is very nice. This solution is great.
I am testing a profile to 122-245 while usb charging. So, when I use Googla Mobile Navigation it is able to load a bit battery while using GPS (normaly drains battery a bit while charging)

out of charge at 6am...it's now 10am...3g ON...wireless ON now for 2hours...
So, in resume, on 4 hours of use the battery loss - 6%
At this rate, and with these settings it should last for about 66hours, about 2,7 days.
Let's see...

casca said:
out of charge at 6am...it's now 10am...3g ON...wireless ON now for 2hours...
So, in resume, on 4 hours of use the battery loss - 6%
At this rate, and with these settings it should last for about 66hours, about 2,7 days.
Let's see...
Click to expand...
Click to collapse
Holy crap!!Yea, that would definately make me root!
Sent from my HTC Legend using XDA App

I can only say...in 3g mode and with the wireless ON 90% of the time from 6am to 00.00, i had more than 40% battery left at 00.00 when i went to bed.For me it's a new record.
Sent from my HTC Legend using XDA App

In my case, tested yesterday:
Battery consumption:
battery at 100% at 10:00 am. 3g data on 1 minute every 15 minutes (JuiceDefender), 30 mínutes call and 8 emails received and red a long de day. Battery was at 41% at 1:00 am. I spent the day in a place with low 3g network (between 1 and 2 bars in the top right corner)
SetCPU Configuration:
-Profile 1: when battery is between 50% and 100%: min 122 mhz, max 600 mhz
-Profile 2: when battery is between 30% and 50%: min 122 mhz, max 480 mhz
-Profile 3: when battery is between 0% and 30%: min 122 mhz, max 245 mhz
So, battery save is very nice.

this is soooooo interesting....
I couldnt find the app in the market...i found the apk in the HTc Dream forum...version 2.01 by coolbho. Is it ok to use that ?

i think so...
in worst scenario...it won't run lol...(i think!)

If i use linpack i can see someone with a legend that runs on 711mhz? Am i missing something can we overclock..
Sent from my HTC Legend using XDA App

I've made some profiles too, and it's working really well.
Are you guys using the auto detection of the device? I've used it in the first time, but it detected my device as a Hero(?) since the max frequency was only 528mhz. Then I've changed the device and selected MSM7x27 manually and got the 600mhz max and many middle frequencies like 120, 122 and 128mhz. Now I've changed the device again to auto detection and it worked this time, got the 600mhz max, but less middle frequencies (no 120 or 400mhz). Also, i'm using 122mhz as the minimum frequency in all profiles, isn't 19mhz too low? Or the demand feature really works that well and I will not even notice any difference?

wasup!
19mhz is not too low, i've used it and had a huge increase in battery life.
I am using profiles also at the moment.
Regards

Learners Lisence said:
this is soooooo interesting....
I couldnt find the app in the market...i found the apk in the HTc Dream forum...version 2.01 by coolbho. Is it ok to use that ?
Click to expand...
Click to collapse
Hi,
You can download from this link:
http://forum.xda-developers.com/showthread.php?t=505419
If you like the app, you can donate getting from Maket. Look for "setcpu for root users". It is only 1.99 USD.

Battery Settings for Darkstone Froyo 2.1

Hey guys, I posted these settings in the main thread of darkstone, and it worked good for some, i'm making this thread to show the setting i'm using to conserve bettery.
I have been using Setcpu and advanced task killer combined and so far my battery life is amazing. I had the phone unplugged and fully charged at around 7 pm, used it for few calls and some gaming and also downloaded some apps, it was at 70% when i went to sleep at 4am, now it is 10 am and the battery is 66%.
You need SetCpu, you can get it from here http://forum.xda-developers.com/showthread.php?t=505419
And Advanced Task Killer found on market for free.
I thought I would share those settings hopefully they work for you guys too,
For SetCpu:
Main Tab: max 1113, min 245, ondemand, check set on boot
Profiles: 1- Screen Off, max 245, min 245, ondemand, Priority 100
2- Battery <25%, max 652, min 245, ondemand, Priority 0
Advanced: Sampling rate= 20000
Up Threshold= 35
leave the rest at 0's and check set on boot and apply.
For Advanced Task Killer:
Go to setting, then auto kill level chose "aggressive", and auto kill frequency set it to "when screen turns off"
I'm using radio 2.12.50.02_2 and stock Tmobile US ROM HSPL3
I hope that helps some of you.

I've had major issues with battery drain. The best I've got so far is about 5% to 7% drain per hour on standby.
I'll try your recommendations too.
Battery is the only thing holding be back from using Android as a full time OS.
Do you charge your battery in Android or in Winmo?

got settings from other thread, thought they were working well turned out they were not lol had to jump back builds

Battery life is keeping these from being fully usable. I can't make it through a full day, I have tried juice defender, set CPU (max fre 800, 245 w/ screen off), turning sync off. I always get at least 5% drain/hr at idle and obviously worse than that when I use the phone.
I am going to charge overnight tonight in win mo then boot android tomorrow morning and see if I can get through the day tomorrow.

kcaj32 said:
I've had major issues with battery drain. The best I've got so far is about 5% to 7% drain per hour on standby.
I'll try your recommendations too.
Battery is the only thing holding be back from using Android as a full time OS.
Do you charge your battery in Android or in Winmo?
Click to expand...
Click to collapse
I charge using android, and I have to agree the only thing we need now is a better battery life, thats why i've been trying all different kind of settings and this worked best.
jae-v said:
got settings from other thread, thought they were working well turned out they were not lol had to jump back builds
Click to expand...
Click to collapse
lol yeah its strange that those settings work for some people and not for others, I guess it depends on the radio/ROM they have.
anap40 said:
Battery life is keeping these from being fully usable. I can't make it through a full day, I have tried juice defender, set CPU (max fre 800, 245 w/ screen off), turning sync off. I always get at least 5% drain/hr at idle and obviously worse than that when I use the phone.
I am going to charge overnight tonight in win mo then boot android tomorrow morning and see if I can get through the day tomorrow.
Click to expand...
Click to collapse
Ok let me know if these settings work for you.

I have the same config in this build
[BUILD][17.08.2010][mattc Leo + Froyo w/Sense 1.5b][Kernel: huanyu 2.6.32.9 #6]
and it is working well even there!
I hade 11 hours down to 15% left of battery yesterday.. and I hade it on surfing by wifi and trying some new games and hade a lot video streaming through youtube the last 2-3 hours.
Before I couldnt last for more than 3-4 hours and the phone got very varm....so this i a start and a very usefull app to use!
If you want to extend it further turn of "data connection" at the point you know your not gonna use the phone for a while.

@Notorious.Marwan, won't having setcpu at 1113 for both max and min be draining the battery more as opposed to having it at 1113 for max and 245 for min? or would the difference be not noticeable at all?

Notorious.Marwan, those settings will not be very good for battery life.
You have max and min set to full clock speed...this is going to use a lot of battery power.
My settings will give much better battery usage...I get 2 days from my HD2:
On the main screen:
Max 1113600
Min 245000
Scaling ondemand
set on boot
PROFILES:
Screen off:
Max 245000
Min 245000
Scaling ondemand
Priority High (100)
Charging/Full:
Max 1113600
Min 245000
scaling ondemand
Priority 50
Battery <27%:
max 652800
min 245000
scaling ondemand
priority 0
Advanced tab:
sampling rate 20000
up threshold 30
ignore nice load 0
powersave bias 0
set on boot

the_scotsman said:
Notorious.Marwan, those settings will not be very good for battery life.
You have max and min set to full clock speed...this is going to use a lot of battery power.
My settings will give much better battery usage...I get 2 days from my HD2:
On the main screen:
Max 1113600
Min 245000
Scaling ondemand
set on boot
PROFILES:
Screen off:
Max 245000
Min 245000
Scaling ondemand
Priority High (100)
Charging/Full:
Max 1113600
Min 245000
scaling ondemand
Priority 50
Battery <27%:
max 652800
min 245000
scaling ondemand
priority 0
Advanced tab:
sampling rate 20000
up threshold 30
ignore nice load 0
powersave bias 0
set on boot
Click to expand...
Click to collapse
I have tried this and it improved the battery life a lot, thank you, original post edited.

the_scotsman said:
Notorious.Marwan, those settings will not be very good for battery life.
You have max and min set to full clock speed...this is going to use a lot of battery power.
My settings will give much better battery usage...I get 2 days from my HD2:
On the main screen:
Max 1113600
Min 245000
Scaling ondemand
set on boot
PROFILES:
Screen off:
Max 245000
Min 245000
Scaling ondemand
Priority High (100)
Charging/Full:
Max 1113600
Min 245000
scaling ondemand
Priority 50
Battery <27%:
max 652800
min 245000
scaling ondemand
priority 0
Advanced tab:
sampling rate 20000
up threshold 30
ignore nice load 0
powersave bias 0
set on boot
Click to expand...
Click to collapse
I've tried your setting and it gave me much better batter life thanks for the heads up, original post edited.

Your problems with battery life are due to SD card usage. Plain and simple. Try a class 2 card for Max performance battery wise!!!
Sent from my HTC HD2 using XDA App

the_scotsman said:
Notorious.Marwan, those settings will not be very good for battery life.
You have max and min set to full clock speed...this is going to use a lot of battery power.
My settings will give much better battery usage...I get 2 days from my HD2:
On the main screen:
Max 1113600
Min 245000
Scaling ondemand
set on boot
PROFILES:
Screen off:
Max 245000
Min 245000
Scaling ondemand
Priority High (100)
Charging/Full:
Max 1113600
Min 245000
scaling ondemand
Priority 50
Battery <27%:
max 652800
min 245000
scaling ondemand
priority 0
Advanced tab:
sampling rate 20000
up threshold 30
ignore nice load 0
powersave bias 0
set on boot
Click to expand...
Click to collapse
I am going to try this.....I was on Darkstones HD2Froyo without setcpu and batterly lasted only 6hrs maybe even less.......
Now i am using Mattc-NexusLeo_v1 build w/ the lastest kernel, used the default or suggested setcpu settings from one of the xda members and i am never at full 100% only 99% or 98% and gives me about 8-12 hours of batt life.
I will try your settings and report back in 24hrs with an update, thanks again for the info!

Notorious.Marwan said:
For Advanced Task Killer:
Go to setting, then auto kill level chose "aggressive", and auto kill frequency set it to "when screen turns off"
Click to expand...
Click to collapse
Also too...Something that I missed at first...In the Advanced Task Killer settings...you have to ignore SetCPU or it will kill it when you turn the screen off and defeat the whole purpose.

Still ridiculous battery drain. 99%->93% in 27 minutes. Using mattc 1.5b.
I've tried the following:
-SetCPU
-juicedefender (data on only when screen unlocked)
-calibrate battery
-delete batterystats
Still need to try a class 2 card versus the class 4 the phone came with.

OCedHrt said:
Still ridiculous battery drain. 99%->93% in 27 minutes. Using mattc 1.5b.
I've tried the following:
-SetCPU
-juicedefender (data on only when screen unlocked)
-calibrate battery
-delete batterystats
Still need to try a class 2 card versus the class 4 the phone came with.
Click to expand...
Click to collapse
do a task killer, I think you have tons of contacts, so you always keep network running.

qingcai said:
do a task killer, I think you have tons of contacts, so you always keep network running.
Click to expand...
Click to collapse
Do no sync your ENTIRE TWITTER FACEBOOK either...

kuntri said:
I am going to try this.....I was on Darkstones HD2Froyo without setcpu and batterly lasted only 6hrs maybe even less.......
Now i am using Mattc-NexusLeo_v1 build w/ the lastest kernel, used the default or suggested setcpu settings from one of the xda members and i am never at full 100% only 99% or 98% and gives me about 8-12 hours of batt life.
I will try your settings and report back in 24hrs with an update, thanks again for the info!
Click to expand...
Click to collapse
UPDATE:
I set my CPU main to "ondemand" at 94% within 30 mins I was at 74%. So I charged for about an hour back to 99% setcpu main screen back to "conservative"..
Today 8/21
- 5am - 99%
- 7am - 90%
- 730am - back on charger
-10am - FULL%
-11am - 95%
-2pm - 85%
- 3pm to 8pm, this is when i got locked up and sent to jail for 5 hours, soooo now I am at 59%
Sooo, in conclusion for mattc NexusLeo Builds vs Darkstone, keep everything the same except your main screen
Max 1113600
Min 245000
Scaling conservative
set on boot
thank you good night

I have found the best combination is Advanced Task Killer and Juice Defender. Don't even need Setcpu with the combination of the 2 above, meaning your build runs as fast as it can, even overclocked I can get easily 1 day out of it. Overnight drain is ~15-20%.

Is it worth it - in terms of speed, fluidity and no screen lag - to set the max value as 1113, instead of the default (998)?
I'm always thinking that we're burning the CPU and draining much more battery.

pa49 said:
Your problems with battery life are due to SD card usage. Plain and simple. Try a class 2 card for Max performance battery wise!!!
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
I thought that you needed to go the other way, as in getting a class 4 or 6 card?
I've got a class 2 SD card and getting crap battery performance

Battery life to share

Hello,
This is something I do want to share for people who has problems with the battery drainage. I don't have the intention to know it all, and I am not a developer. I'm just happy XDA user.
Like most of the users here we all like Android on our HD2 but the battery drainage can be annoying. I searched a lot threads for the right settings with SetCPU etc.
One day I was fed up with it and installed a new ROM, new radio, new kernel and a new Android. See my signature which versions (also for download).
All I needed to install again was SetCPU. On the Android market I found a program called CPU Tuner. So I installed it and looked what I could do with it.
There wasn't really much to adjust, but weirdest thing of all is that the battery drainage is really minimal. I send some textmessages, had a few phonecalls... Surfed the net for like 15 minutes. My Wifi and 3G are on all the time.
Please don't ask me how it's possible, but I thought just to share it with you.
Here are the settings of CPU Tuner:
Tab Current
Governor
interactive
Max 998 MHz
Min 245 MHz
Tab Profiles
I have 3 Profiles
1st
AC Power
Interactive
Max 653 MHz
Min 245 MHz
2nd
Battery Power
Interactive
Max 768 MHz
Min 245 MHz
3th
Critical Battery
Interactive
Max 691 MHz
Min 245 MHz
Tab Settings
Got "Enables Profiles" switched on
Got "Start on boot" switched on
Got "Statusbar notifications" switched on
Got "Toast notifications" switched on
So it looks like setCPU a lot but can't change settings that much.
If you got any questions, feel free to ask and I'll try to answer them.
grtz. Sander

I dont have the interactive option on mine... just indemand and others such as powersave.... but no interactive. What should I use?
Also what is your current widget drainage showing?

Is your phone rooted? And which kernel do you have?
If you have a rooted phone and Hastarin 8.1 kernel, you should have the option of interactive with CPU Tuner (also with SetCPU).
Do you have a widget for me to measure my drainage? I will let you know if what it is...

sander2010 said:
Do you have a widget for me to measure my drainage? I will let you know if what it is...
Click to expand...
Click to collapse
Use CurrentWidget on the market.
With my current setup (VBNROM Reloaded 2, NexusHD2-FRG83 v1.6, hastarin 8.1 kernel, 2.15 Radio) I've found the only way to get consistent <10mA idle is with setCPU and Tasker. I understand that setCPU is supposed to be redundant with the newer kernels, but without it, my phone drains in the 20-30 mA range. I only use a screen off profile on setCPU, 245 max. That's it.
I've also found that GPS tends to really drain the battery when the phone isn't using wifi for location. Tasker (available for $$ on the market) is great for this - I set it to only turn on GPS when I open maps or navigation.
Also -- searching for wifi seems to also drain the battery, so either turn it off when you aren't using it, or set wifi to sleep when the screen is off (settings --> wireless & network --> wifi settings --> [menu/start button] Advanced --> wifi sleep policy).

I use Shubcraft 2.0, with the ElBartoMe kernel (no overclocking, or undervolting as far as I'm aware) and NO setcpu at all, my drainage is <8Ma on average in standby and my battery lasts about 20 hours with what I would call moderate usage (about 2 hours a day listening to mp3's, at least an hour on the phone, 3G permanently on and syncing every 30 mins for facebook, gmail etc and about an hour or so gaming as well. Even at the 20 hour mark I've still always got about 15% left anyway, I just leave it to charge while I get my (very little amount of) sleep.

I've downloaded currentwidget and I will keep it running from now on.
I had it set on refresh every minute
operation on value "none
Checked Write to log file
Checked Log running applications.
So tommorrow I will share my log file. Maybe you people can get more info out of the file

I use the new MDJ S2 kernel with the smartass governor.
It has the CPU profiles built into the kernel, so you don't have to use any SetCPU profiles, and it extended my battery life by like 2X, it's pretty amazing, I was on hastarin r8 before.
I recommend you try it out.

I've downloaded currentwidget and I will keep it running from now on.
I had it set on refresh every minute
operation on value "none
Checked Write to log file
Checked Log running applications.
Tommorrow I will show you my logfile.

sander2010 said:
I've downloaded currentwidget and I will keep it running from now on.
I had it set on refresh every minute
operation on value "none
Checked Write to log file
Checked Log running applications.
Tommorrow I will show you my logfile.
Click to expand...
Click to collapse
XDA Server overloaded....lol

orangekid said:
I use the new MDJ S2 kernel with the smartass governor.
It has the CPU profiles built into the kernel, so you don't have to use any SetCPU profiles, and it extended my battery life by like 2X, it's pretty amazing, I was on hastarin r8 before.
I recommend you try it out.
Click to expand...
Click to collapse
So if I'm right, the latest kernels have already the right settings built in?
Like Hastarin 8.1 and the MDJ S2 kernel...
And I was thinking that I found a solution by accident

I have created a log, but I have logged it from minute to minute.
So if you are interrested I will place it.
For now I chanched it to every hours so it will be easier.

I downloaded the cputuner but cannot find the governor "interactive" on the list. Is there another one that would work?

Hey,
thanks a lot sander! Using your guide I got my battery drainage on standby from 50-60 mA to 7mA! Really helps, cheers again!
Using ChuckyROM on WM, NexusHD2 V1.6 Android, and Radio 2.12.50

boardwak said:
Use CurrentWidget on the market....
Click to expand...
Click to collapse
This was a great find.
boardwak said:
I've also found that GPS tends to really drain the battery when the phone isn't using wifi for location. Tasker (available for $$ on the market) is great for this - I set it to only turn on GPS when I open maps or navigation....
Click to expand...
Click to collapse
Good find. Shutting off GPS when it was not in use changed my resting MA draw my a large amount. I think that is strange as GPS was not even being used. (seems that this is different between different radio versions).
boardwak said:
...Also -- searching for wifi seems to also drain the battery, so either turn it off when you aren't using it, or set wifi to sleep when the screen is off (settings --> wireless & network --> wifi settings --> [menu/start button] Advanced --> wifi sleep policy).
Click to expand...
Click to collapse
I use Y5 from the market for shutting off WiFi when I am away from 'known' WiFi points. That really helps with battery drain.

this helped alot now im down to the double digits how do I go down to the single?

What does rooted device mean ? As the application mentioned it in the bracket when i searched it.

save Battery power with SetCPU - SGS

Here is screenshot of my SGS
There is just drop of 7 % after standby 10 hrs (includes - 3G data on for 5 hrs)
previously it was about 18-19 % in same condition(set CPU - conservative scalling)
I have recently manage with SetCPU scalling profile
There is advice on SetCPU user to use conservative scalling, inspite of that i have set scalling to Ondemand on my SGS, and working without single crash since 5 days
Phoneweaver is also gud application to stop some services like Data during night hrs, that also saving quite good amt of battery power.

dr.ketan said:
Here is screenshot of my SGS
There is just drop of 7 % after standby 10 hrs (includes - 3G data on for 5 hrs)
previously it was about 18-19 % in same condition(set CPU - conservative scalling)
I have recently manage with SetCPU scalling profile
There is advice on SetCPU user to use conservative scalling, inspite of that i have set scalling to Ondemand on my SGS, and working without single crash since 5 days
Phoneweaver is also gud application to stop some services like Data during night hrs, that also saving quite good amt of battery power.
Click to expand...
Click to collapse
Try "incredi control"
Sent from my MT15i using Tapatalk

I have always used ondemand with setcpu without any difficulties, I also use screen off max profile to set max speed to 400 mhz to save battery, works well
Sent using TCP/IP

[Q] [I9505] [GAMING] What is the best rom for games ?

I'm searching for the perfect gaming rom
For me a gaming rom need to have good performance and great battery life.
I tried a lot of rom but didn't find the perfect one.
Please share your experience (rom, kernel, settings) which make you stay with.

Well, I'm using the GPE rom by Danvdh. I'm running the default kernel that comes with the rom (Googy-Max kernel)
It seems to perform pretty well.
I underclocked the CPU to 1242 (1.2 GHz) and it seems to be running GTA San Andreas (on default settings) and The Walking Dead just fine and without any issues like stuttering and slowdowns.
I could get about 2 hours playing those games on battery before the battery dies (But the phone is only a couple of moths old, so the battery isn't worn out). This of course is just an assumption as I generally don't let the phone go below 50% or 20%.
I've disabled the button backlight and vibrations. Set the screen brightness to the lowest setting (adaptive brightness off). Turned off GPS.
Turn off wifi and mobile networks if you want maximum battery while gaming (duh). Heck, you might as well turn off the radio if you want to maximize battery while gaming, (put it in airplane mode) cuz that eats the most juice (aside from the screen).
CPU Governor: Intelliactive
I/O Scheduler: FIOPS
GPU Governor: OnDemand
Every other option in the STweaks app is set to default.
Also, make sure there are only a few background apps running.