Related
This kernel is based on Thalamus's Oxygen Kernel but with AVS and he's given me permission to post it here for testing.
I implemented AVS from scratch (based on the Code Aurora kernel) and it seems to work well for me.
AVS uses some hardware to emulate the longest gate delays through the CPU datapath. If the delay is longer than expected, the CPU voltage can be decreased, if shorter then it can be increased. This means that the CPU is always running near the minimum voltage it requires and because power consumption rises with the square of voltage this is a good thing.
Here are the results of some initial tests (full load, no idle):
Clock Speed, Without AVS, With AVS
1113600,234mA,223mA
998400,207mA,190mA
768000,158mA,138mA
499200,111mA,93mA
384000,90mA,79mA
245000,70mA,64mA
So there are power savings of about 8-15%
All patches are initially pushed here:
https://github.com/dzo/kernel/tree/2.6.35-bravo-exp
and should end up here:
https://github.com/thalamus/kernel/tree/2.6.35-bravo-exp
You can see the current status of AVS by doing:
Code:
cat /sys/module/avs/parameters/status
Doing:
Code:
echo 1 > /sys/module/avs/parameters/debug
will put lots of debugging info in the kernel log.
To disable AVS do:
Code:
echo 0 > /sys/module/avs/parameters/enabled
The minimum voltage is set to 900mV but you can change this using e.g.:
Code:
echo 850 > /sys/module/avs/parameters/vdd_min
Putting too low a value in here will crash your phone because AVS seems to have trouble with low frequencies.
I also added some extra frequency steps, 76.8MHz and 192MHz.
Don't expect huge power savings, the CPU is only one of the things using power on our devices.
I think AVS is a nice idea and I'd like to know how stable it is on other people's phones.
To install, flash the attached update zip from recovery.
Please don't use this kernel unless you are fairly well informed about what you are doing.
15/4/12: Updated kernel with higher vdd_min
Going to give this a test now, I'll report back later.
How did you produce those mA readings btw?
have you tried using other kernels like Eviolets one? does it really save much more battery than EVs?
is it 100% stable??
with the kernel using some hardware to calculate the voltages needed wouldnt it take some more power to get the calculations done?
cez10 said:
have you tried using other kernels like Eviolets one? does it really save much more battery than EVs?
Click to expand...
Click to collapse
Why don't you try it and find out instead of asking questions.
is it 100% stable??
Click to expand...
Click to collapse
I think the words '[Kernel]Experimental' in the thread title are a clue.
with the kernel using some hardware to calculate the voltages needed wouldnt it take some more power to get the calculations done?
Click to expand...
Click to collapse
The overhead of the calculations is negligible.
So this is only for gingerbread AOSP ROMs or works on Sense as well?
lvnatic said:
So this is only for gingerbread AOSP ROMs or works on Sense as well?
Click to expand...
Click to collapse
Oh my...people just want to be spoonfed on XDA these days.
This kernel is based on Thalamus's Oxygen Kernel
Click to expand...
Click to collapse
As Oxygen is an AOSP ROM it's fairly clear that it's not going to be a sense kernel isn't it?
Thanks for sharing this.
What are the available governors? I can't find this information on github.
Will switching between governors (depending on phone state) cause any issues with the voltage change, that aren't advised?
_thalamus said:
Oh my...people just want to be spoonfed on XDA these days.
As Oxygen is an AOSP ROM it's fairly clear that it's not going to be a sense kernel isn't it?
Click to expand...
Click to collapse
He never mentioned it is specifically for AOSP or Sense ROMs. I was wondering if this is just a separate script, not kernel dependent. But if I give it a 2nd read then yes, it seems indeed it is an entire kernel, my bad, no need for a spoon...or w/e it means.
lvnatic said:
He never mentioned it is specifically for AOSP or Sense ROMs. I was wondering if this is just a separate script, not kernel dependent. But if I give it a 2nd read then yes, it seems indeed it is an entire kernel, my bad, no need for a spoon...or w/e it means.
Click to expand...
Click to collapse
Don't listen to Thalamus. He has no time for people less "knowledgeable" than him. There was a time where I thought a kernel was a kernel.
I thought I had escaped his unhelpful comments when I left Oxygen thanks to his attitude (if you don't like his attitude, then tough is the general gist of it). If he was a shop owner he would go bankrupt, quickly, as he has no people skills whatsoever.
If he wasn't a dev, he would be labeled a troll, yet he is allowed to get away with being nasty to people. When will XDA introduce a -thanks button?
I think the saying goes, if you don't have anything nice to say, then don't say anything at all.
Thanks, this one looks like a good project
As to stability: i've been using this kernel for a couple hours without issues, with very small draining btw; anyway a few minutes ago the phone became unresponsive: i was just typing a message with whatsapp, clocked 192x806, and a freeze occurred. A soft reset did the trick.
Keep up the good job
Edit: i'm on beta 2 fyi...
chronicfathead said:
Don't listen to Thalamus. He has no time for people less "knowledgeable" than him. There was a time where I thought a kernel was a kernel.
I thought I had escaped his unhelpful comments when I left Oxygen thanks to his attitude (if you don't like his attitude, then tough is the general gist of it). If he was a shop owner he would go bankrupt, quickly, as he has no people skills whatsoever.
If he wasn't a dev, he would be labeled a troll, yet he is allowed to get away with being nasty to people. When will XDA introduce a -thanks button?
I think the saying goes, if you don't have anything nice to say, then don't say anything at all.
Click to expand...
Click to collapse
Hahahahahaha.
That cheered me up, I'm having a crap day.
Happy to be of assistance.
Edit: You prove how little you know about me by saying that I have no time for people less knowledgeable than me. That is totally untrue. I spend a lot of time helping people who are less knowledgeable than me. What I have no time for is laziness, people who won't help themselves or idiots. There is a big difference.
_thalamus said:
Hahahahahaha.
That cheered me up, I'm having a crap day.
Happy to be of assistance.
Edit: You prove how little you know about me by saying that I have no time for people less knowledgeable than me. That is totally untrue. I spend a lot of time helping people who are less knowledgeable than me. What I have no time for is laziness, people who won't help themselves or idiots. There is a big difference.
Click to expand...
Click to collapse
I only base my observation on posts of yours that I have read. Rather than shooting people down, advise them so they can improve their knowledge.
sent by touching my Desire
In Airplane mode i had 2mA battery usage all night without AVS and 5mA usage with AVS. This is via Battery monitor widget.
Xinot said:
In Airplane mode i had 2mA battery usage all night without AVS and 5mA usage with AVS. This is via Battery monitor widget.
Click to expand...
Click to collapse
AVS has nothing to do with power consumption while the device is asleep. When the phone sleeps, the CPU is power collapsed, i.e. is completely powered down. AVS only changes the voltage while the CPU is awake.
The Kernel work great on Miui 1.4.8 since 2 days! No reboot or freeze... and in idle with JiuceDefender, 652Mhz max ondemand over 3h the device lost only 2% accu
Thanks for your work
Sent from my HTC Desire using XDA App
I've just updated the kernel in the first post to increase the minimum voltage and remove some possibly unstable frequencies.
Should be more stable now.
dzo said:
AVS has nothing to do with power consumption while the device is asleep. When the phone sleeps, the CPU is power collapsed, i.e. is completely powered down. AVS only changes the voltage while the CPU is awake.
Click to expand...
Click to collapse
OukkiDoukki! So i have something else going on here...
Thanks running sweet keep up the great work using on GV 2.0
Sent from my HTC Desire using XDA Premium App
cez10 said:
have you tried using other kernels like Eviolets one? does it really save much more battery than EVs?
is it 100% stable??
Click to expand...
Click to collapse
Just a quick post to say that I've been testing this kernel for 2/3 days (actually the version that Thalamus has in his experimental github) and find the battery usage to be the same. But the AVS code seems much cleaner than the implementation I have.
As for stability, I haven't had a single crash yet. And overall speed seems better than on my kernel.
Quadrant also confirms this.
Regards,
EViollet said:
Just a quick post to say that I've been testing this kernel for 2/3 days (actually the version that Thalamus has in his experimental github) and find the battery usage to be the same. But the AVS code seems much cleaner than the implementation I have.
As for stability, I haven't had a single crash yet. And overall speed seems better than on my kernel.
Quadrant also confirms this.
Regards,
Click to expand...
Click to collapse
Do you think you will be compiling ManU 1.5 from this source then?
I've taken a look at the various kernel offerings in the development section and I have to say nice work to everyone working on them. I can make a rom, but have no clue about kernel work. My question is, can we clock any higher than 1.55GHz? I wasn't sure if anyone has tried making a kerel that can clock to 1.8 or anything like that. I would love to try out a kernel that OC's higher as my phone seems to handle 1.55GHz like a champ. Does anyone know of a kernel that clocks higher or know if anyone is working on one? Or does anyone have any good resources about kernel development and how to make one that clocks higher. I wouldn't mind learning to develope a kernel. Thanks in advance for any information.
Just curious. At 1.55Ghz how hot does your phone get? Can you use it to fry eggs?
jboxer said:
Just curious. At 1.55Ghz how hot does your phone get? Can you use it to fry eggs?
Click to expand...
Click to collapse
My phone only gets hot when I really put stress on it, like running Antutu or high graphic games. Right now just with normal use my battery is 34.8C/94.6F. I'm not sure if that is good or not though, lol.
jboxer said:
Just curious. At 1.55Ghz how hot does your phone get? Can you use it to fry eggs?
Click to expand...
Click to collapse
Lmao.
To the OP: how long does your battery last? I've been playing with different kernels too..but the most stable one i've tried so far is the latest Faux v0.4.1 But i really want to try the Trinity15...
babymatteo said:
Lmao.
To the OP: how long does your battery last? I've been playing with different kernels too..but the most stable one i've tried so far is the latest Faux v0.4.1 But i really want to try the Trinity15...
Click to expand...
Click to collapse
I'm not really sure how long it lasts. I haven't tested it to see. I have my phone plugged in a lot at work, so it charges a lot. I will unplug it and see what I get out of it and report back. I am using faux's kernel at the moment.
I see. @ 1.1ghz i get more or less 10hrs of battery life..with moderate use like texting, FB, and occasional youtube videos.
Hi guys!
I was looking for ways to increase battery life.
As far as I know you can undervolt and decrese CPU speed
Undervolt does not affect performance but does increase temperature right?
Decrease CPU speed obviously decreases the speed of the phone.
Both these things can be achieved by using a custom kernel right? I heard of franco kernel as being the best for these things...
Any other ways of increasing battery life?
Cheers!
nad4321 said:
Hi guys!
I was looking for ways to increase battery life.
As far as I know you can undervolt and decrese CPU speed
Undervolt does not affect performance but does increase temperature right?
Decrease CPU speed obviously decreases the speed of the phone.
Both these things can be achieved by using a custom kernel right? I heard of franco kernel as being the best for these things...
Any other ways of increasing battery life?
Cheers!
Click to expand...
Click to collapse
Why not try Franco first before starting to tweak. The kernel's default settings are reputedly optimal for that elusive balance between performance and battery life.
Sent from my Nexus 5
PhilipTD said:
Why not try Franco first before starting to tweak. The kernel's default settings are reputedly optimal for that elusive balance between performance and battery life.
Sent from my Nexus 5
Click to expand...
Click to collapse
yeah well im using stock now so it was just a matter wether changing to franco would make a difference
nad4321 said:
yeah well im using stock now so it was just a matter wether changing to franco would make a difference
Click to expand...
Click to collapse
Yeah, give it a try. Since I installed it, the phone (and my N7, too) has become snappier, and battery life on standby is awesome (like 1-2%/hr). SOT, on the other hand, is still lamentable, even at dim levels. If you do go Franco, I recommend getting the FK updater app on the Play Store.
Sent from my Nexus 5
PhilipTD said:
Yeah, give it a try. Since I installed it, the phone (and my N7, too) has become snappier, and battery life on standby is awesome (like 1-2%/hr). SOT, on the other hand, is still lamentable, even at dim levels. If you do go Franco, I recommend getting the FK updater app on the Play Store.
Sent from my Nexus 5
Click to expand...
Click to collapse
Cheers! Do you know any good tutorial to unlock bootloader, root and instal custom recovery + kernel? Long process hahaha
nad4321 said:
Cheers! Do you know any good tutorial to unlock bootloader, root and instal custom recovery + kernel? Long process hahaha
Click to expand...
Click to collapse
There's a tutorial on this in the forum. I'd link it to you but I am on my tablet at the moment.
Sent from my Nexus 7 using Tapatalk 4
nad4321 said:
Cheers! Do you know any good tutorial to unlock bootloader, root and instal custom recovery + kernel? Long process hahaha
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2507905
http://forum.xda-developers.com/showthread.php?t=2508284
Sent from my Nexus 5
PhilipTD said:
http://forum.xda-developers.com/showthread.php?t=2507905
http://forum.xda-developers.com/showthread.php?t=2508284
Sent from my Nexus 5
Click to expand...
Click to collapse
Thanks again From your own experience what would you recommend TWRP or CWM
nad4321 said:
Thanks again From your own experience what would you recommend TWRP or CWM
Click to expand...
Click to collapse
TWRP, without a doubt. It's completely stable, and easy to use. CWM used to be really wonky; that's why I switched.
Sent from my Nexus 5
PhilipTD said:
TWRP, without a doubt. It's completely stable, and easy to use. CWM used to be really wonky; that's why I switched.
Sent from my Nexus 5
Click to expand...
Click to collapse
I guess all of these CPU speeds and undervolt can be changed at any time withouth erasing anythign right?
nad4321 said:
Thanks again From your own experience what would you recommend TWRP or CWM
Click to expand...
Click to collapse
Philz touch. Its cwm based, more features than twrp and cwm put together and more stable than both too.
-----------------------
Sent via tapatalk.
I do NOT reply to support queries over PM. Please keep support queries to the Q&A section, so that others may benefit
nad4321 said:
I guess all of these CPU speeds and undervolt can be changed at any time withouth erasing anythign right?
Click to expand...
Click to collapse
You can set up virtually any configuration with Franco. But, again, I suggest you try his default settings first. He put a lot into figuring it out, and his findings likely are the most reliable. I've never felt the need to customize the kernel any differently.
Some people, however, really like to mess around with the settings as a kind of hobby. I used to do so, and it's a lot of fun (and headaches). So, if you want to get into it, go for it. There are numerous apps you can use to tweak all those settings.
Sent from my Nexus 5
---------- Post added at 07:03 AM ---------- Previous post was at 07:01 AM ----------
rootSU said:
Philz touch. Its cwm based, more features than twrp and cwm put together and more stable than both too...
Click to expand...
Click to collapse
I know, I've been meaning to check out out. Thanks
Sent from my Nexus 5
PhilipTD said:
You can set up virtually any configuration with Franco. But, again, I suggest you try his default settings first. He put a lot into figuring it out, and his findings likely are the most reliable. I've never felt the need to customize the kernel any differently.
Some people, however, really like to mess around with the settings as a kind of hobby. I used to do so, and it's a lot of fun (and headaches). So, if you want to get into it, go for it. There are numerous apps you can use to tweak all those settings.
Sent from my Nexus 5
---------- Post added at 07:03 AM ---------- Previous post was at 07:01 AM ----------
I know, I've been meaning to check out out. Thanks
Sent from my Nexus 5
Click to expand...
Click to collapse
I noticed that by default it has 2 cores working and then uses the other 2 when required... This might sound stupid but did stock already do this?
Try greenify and xposed framework.
https://play.google.com/store/apps/details?id=com.oasisfeng.greenify‎
Im running the catalysm rom + franco kernel undervolted (which by the way decreases the temperature) and under clocked to 1728mhz. I also am using greenify + xposed. Finally I turn off location reporting, touch sounds, always scanning wifi and set location to "battery saving" mode. Without any gaming I get around 5hr of screen on time. Straight gaming gives me around 2.5hr of SOT. Usually I get around 4hr from my regular day. Any other tips for battery?
Hi guys,
Thanks for all your help so far! Love this forum.
I'm pretty noob when it comes to Android customization, so I wanted your opinion: I'm trying to decide whether to run a stable, fast ROM, or simply stock with GravityBox and Franco Kernel.
Here are my considerations:
I'm not an advanced user, but I do use my phone a lot for work and personal things like email, browser, gps, videos, etc. Since I rely on it a lot, stability is pretty key. However, I get really bothered by some UI restrictions on stock (in particular non-customizable Quick Settings, non-customizable status/nav bars, and no PIE, but other small things count too). GravityBox is sufficient for the customization I need, but at this point speed and battery life come into consideration also. I wouldn't mind a longer battery since I use the phone pretty heavily. Speed is a consideration in that it would help me get things done faster.
So I guess my dilemma is whether I should use stock while relying on GB for customization and Franco kernel for battery efficiency, or if I should run a stable, fast ROM like SlimKat for the same purposes?
Xposed will slow things down so IMHO if a ROM has all your needs, use that.
That said I use a ROM and xposed
Sent from my Nexus 5 using Tapatalk
rootSU said:
Xposed will slow things down so IMHO if a ROM has all your needs, use that.
That said I use a ROM and xposed
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Exactly. But even I prefer stock + GB
Sent from my Nexus 5 using Tapatalk
Thanks for the replies guys. What ROM would you recommend for GB-like customization options, stability, and good battery life?
karabasdutapis said:
Hi guys,
Thanks for all your help so far! Love this forum.
I'm pretty noob when it comes to Android customization, so I wanted your opinion: I'm trying to decide whether to run a stable, fast ROM, or simply stock with GravityBox and Franco Kernel.
Here are my considerations:
I'm not an advanced user, but I do use my phone a lot for work and personal things like email, browser, gps, videos, etc. Since I rely on it a lot, stability is pretty key. However, I get really bothered by some UI restrictions on stock (in particular non-customizable Quick Settings, non-customizable status/nav bars, and no PIE, but other small things count too). GravityBox is sufficient for the customization I need, but at this point speed and battery life come into consideration also. I wouldn't mind a longer battery since I use the phone pretty heavily. Speed is a consideration in that it would help me get things done faster.
So I guess my dilemma is whether I should use stock while relying on GB for customization and Franco kernel for battery efficiency, or if I should run a stable, fast ROM like SlimKat for the same purposes?
Click to expand...
Click to collapse
Yep, SlimKat, If stock Slim is missing a feature, about 50 people in that thread build their own Slim with some mods. One guy builds a version that has a DL/UL speed indication, L-style navbar buttons, and a bunch of other things.
Kernel, use Code_Blue. I prefer it over Franco. Just don't use the stock Slim kernel.
rahulpat13 said:
Exactly. But even I prefer stock + GB
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Stock ROM is awful IMHO.
Sent from my Nexus 5 using Tapatalk
rootSU said:
Stock ROM is awful IMHO.
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
Thats why we have slim rom
doctor_droid said:
Thats why we have slim rom
Click to expand...
Click to collapse
Indeed. Even then I still add xposed though.
Sent from my Nexus 5 using Tapatalk
I'll add my usual comment..... Lol
Roms have near nothing to do with battery life. It's setup and usage that make or break battery life.
Don't factor battery life into Rom decisions.... They're all the same. ?
KJ said:
I'll add my usual comment..... Lol
Roms have near nothing to do with battery life. It's setup and usage that make or break battery life.
Don't factor battery life into Rom decisions.... They're all the same. ?
Click to expand...
Click to collapse
The only way a ROM can really affect battery is if a feature is designed poorly or there's a derp in the build..
But yeah, you can't really improve "ROM battery life", you can only make sure there aren't any problems which affect it negatively.
rootSU said:
Xposed will slow things down so IMHO if a ROM has all your needs, use that.
Click to expand...
Click to collapse
Really? I have the stock ROM and xposed with six different modules and I haven't noticed a substantial performance difference. Perhaps it's one of the modules you have installed or maybe xposed doesn't play as well with your ROM as it does with stock?
BirchBarlow said:
Really? I have the stock ROM and xposed with six different modules and I haven't noticed a substantial performance difference. Perhaps it's one of the modules you have installed or maybe xposed doesn't play as well with your ROM as it does with stock?
Click to expand...
Click to collapse
Xposed is always going to slow it down. The amount, however, is different for everyone.
KJ said:
I'll add my usual comment..... Lol
Roms have near nothing to do with battery life. It's setup and usage that make or break battery life.
Don't factor battery life into Rom decisions.... They're all the same. ?
Click to expand...
Click to collapse
So what about things like Franco Kernel, which claims to slow down processor when not in use to conserve battery?
And thanks for the help guys. I flashed SlimKat for now and am so far pretty happy with it.
Lethargy said:
Xposed is always going to slow it down. The amount, however, is different for everyone.
Click to expand...
Click to collapse
Currently m an exception . Only module m using is gb...and by far havent noticed any slowdown...
doctor_droid said:
Currently m an exception . Only module m using is gb...and by far havent noticed any slowdown...
Click to expand...
Click to collapse
Might not be noticeable, or it might be obvious, it's still always going to slow it down overall. Different experience between different people.
karabasdutapis said:
So what about things like Franco Kernel, which claims to slow down processor when not in use to conserve battery?
And thanks for the help guys. I flashed SlimKat for now and am so far pretty happy with it.
Click to expand...
Click to collapse
I've used every Rom and kernel almost and after setting each up how I regularly do, and with similar usage patterns always....my battery times were always similar.
I never play with the clock speeds I should add......but that's my experience. The roms or kernels I used made no real difference to my battery life.
?
Yes I've seen lots of "claims"....And guess what, many believe them. ?
Dear everyone,
I' ve trapped by the battery issue of my phone. I absolutely love this phone but the battery life is so weak to me. Since my last phone is Mate20p which can be used for 2 days, I feel OP7pro is an only one-day phone and even need to charge twice in a day. However, I find there are so many alternative choices for me like in terms of the kernels, ROMs, etc. I am a new here, just wanna know which project is the best for extending the battery life? Thank you guys so much. Oh, by the way, I expect these projects have not many obvious issues for daily usage.
Kind regard,
jayxiao171735 said:
Dear everyone,
I' ve trapped by the battery issue of my phone. I absolutely love this phone but the battery life is so weak to me. Since my last phone is Mate20p which can be used for 2 days, I feel OP7pro is an only one-day phone and even need to charge twice in a day. However, I find there are so many alternative choices for me like in terms of the kernels, ROMs, etc. I am a new here, just wanna know which project is the best for extending the battery life? Thank you guys so much. Oh, by the way, I expect these projects have not many obvious issues for daily usage.
Kind regard,
Click to expand...
Click to collapse
My GM1917's battery life benefitted greatly from just NoLimits Magisk mod debloat. No issues at all. Stock OOS 9.5.11 and stock kernel. Also have forced 90hz and fixed resolution to QHD+.
NoLimits + Renovate Ice + Arter79 kernel has done me wonders. ~ 10%/hr drain on screen .3-.5%/hr drain standby.
Just debloating might improve it...
galaxys said:
Just debloating might improve it...
Click to expand...
Click to collapse
what does debloating mean..
galaxys said:
Just debloating might improve it...
Click to expand...
Click to collapse
Oh, I know, but I think might be not enough, I tried xXx limited yet.
jayxiao171735 said:
Oh, I know, but I think might be not enough, I tried xXx limited yet.
Click to expand...
Click to collapse
Install a good kernel (smurf kernel, kirisukura) and set it up for battery saving