Database Develop

[Q] Kernel Patching for Performance

I am an active linux user and am always building my own custom kernels for my machines here but have not even looked at compiling one for my galaxy s since I've only had it for a couple of months (2 weeks being replaced by futuretel).
But I was reading an interesting article today about some patches that have entered the 2.6.37 development stream and provide considerable performance increases and "is designed to automatically create task groups per TTY in an effort to improve the desktop interactivity under system strain." (http://www.phoronix.com/scan.php?page=article&item=linux_2637_video&num=1)
I do understand that this kernel is still under development and that the patch itself has undergone significant changes during testing. Linus seems fairly pleased with its performance and I am going to be testing it on my laptop soon.
My questions to those familiar with the kernels for android are is this patch relevant to the operation of the android phones? and, do you feel that porting this sort of patch would be significantly beneficial to the android platform?
Obviously this patch will flow through naturally when the android system natively uses this kernel version but I was just curious.

So far that i have read you don't have any use for it on the sgs.
But i haven't read that someone have tried it yet.
Have not tried it.
But you can always make this patch for sgs kernel and try it out.
If you make it then i can help to try it out in my kernel. Just tell me how to patch when you finish...
Sent from GT-I9000 jpo. My own kernel for z4mod and with 342MB Ram

Its been already discussed at last twice here.
User bilboa1 commented on this, stating that it will bring performance degradation only.

Thanks for the replies anyways guys. Looks like I'm just going to have to get myself a second sgs to mess around on with custom kernel building.

Requesting a Voltage Control App

Hey all,
I am new to the fascinate (but coming from Captivate) and I was curious if any of our Devs could make a simple app that could allow us to customize how we undervolt our overclocked kernals. There is one that I have for my captivate but support for it was dissolved when the dev who created it decided to only focus on specific i9000 kernals, and unfortunately the version that still works on my captivate will not install on the fascinate. The newest version will however install, but it requires one of the supported i9000 kernals
Does anyone have the know-how to develop an app for this purpose? I found that when undervolting my over-clocked kernals to my phone's ability I could maximize battery life as well as the internal heat, while still having the phone in beast mode with OC's around 1.3ghz.

Can you link the source for it? I personally can't dev, but it may interest some devs.

I've seen it for the GSM kernels, but I don't know if it would work for our phones as the way the CPU frequency and power management is setup is entirely different from the GSM models. I agree that it was a great idea, but it looked to be over my head on how it was done.

RacerXFD said:
Can you link the source for it? I personally can't dev, but it may interest some devs.
Click to expand...
Click to collapse
Sorry I know how to flash roms, kernals, etc. but no clue how to do anything else
Sent from my SAMSUNG-SGH-I897 using XDA App

Can you link the original thread?

There wasn't one, it was included in a few roms until he decided to partner with a certain dev to only support specific kernals. I have a several of the different versions including the older one that still works for all of the captivate kernals, I could post the apk if that would help. Would that be wrong to post his work though?
Nevermind, found this, hope it helps!
http://code.google.com/p/voltage-control/
Sent from my SAMSUNG-SGH-I897 using XDA App

when i stumbled across this when forum browsing, i brought it up to adryn...i think he and jt talked it over or something....i dont remember what came of it, other than it couldnt work with our kernels as is...either it would take .32 or they d have to build the kernels different or something...i dont recall

nitsuj17 said:
when i stumbled across this when forum browsing, i brought it up to adryn...i think he and jt talked it over or something....i dont remember what came of it, other than it couldnt work with our kernels as is...either it would take .32 or they d have to build the kernels different or something...i dont recall
Click to expand...
Click to collapse
Probably due to VZW_AUTH stuff.

[Q] Any chance we can get a tun.ko for Revo?

As a Linux developer for a day job, I know the easiest way to build a tun.ko module for the Revo would be to have kernel sources, and from what I understand no one here has that at the moment.
However, if LG has some form of SDK, the kernel headers and enough info may exist to build a tun module--which is required for those of us who would like to use a real Cisco VPN, via vpnc/get-a-robot, etc.
Anyway, if anyone knows of work ongoing or needs a tester to try out a tun.ko, let me know
- Phil

I suppose I could build one from the generic CodeAurora sources, then edit the module to be compatible with the kernel magic the LG one uses...
It'd be kind of low on the priorities right now, as I'm hard at work getting CM7 on this thing

No problem..understand the priorities. I assume I could poke around myself, but I really don't have that urgent of a need at this point, and have plenty of life activities that keep me from hacking on Android
I assume any tun.ko for a similar kernel could be munged with kern magic, as long as it is build for same CPU and family/model as Revo...
- Phil

+1
I'd love to see this too.

....and then there are some threads that are over my head.

no joy with VPN for the Revo yet?

Kexec port for D2 working.

All those able to make use of this information may want to look here.
http://forum.xda-developers.com/showthread.php?t=1609654

Hash said on twitter it was to much work to get this to work with the d3 and ics,unless I missunderstood his tweet the other day..
[email protected]_Carbone
kexec stuff for D3 isnt useful w/o a 3.x kernel. Which would be a ton of work.
@Motorola needs to say what's happening w/D3.
6:39pm - 28 Apr 12 via Plume for Android
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Click to collapse

I saw. Getting kexec itself up and running is one (positive) thing. Then wed need the 3.0 kernel. Kernel source of RAZRs ICS may not be far off and may help.
There are also people (search Kabaldan) who can pull of porting of kernel bits - as with the original Milestone and a similar exploit.
That guy is a genius.

Kabaldan its a great dev with huge skills and enthusiasm, i have milestone #1 so he was my little god.
maybe We should think or not to buy him one piece droid3: D all of us invest a some $$ but benefits will be enormous i thinkg

Get that person who startd the thread in the general section to send one theirs to him lol
Sent from my XT862 using Tapatalk

I think could try hash kindle kernel or even just use the .config from the 2.3.6 posted by moto and fill in the new options. Pretty sure the kernel itself will be easy once kexec is working

Give it a go Willis! we wait with baited breath. If you take on the project id say make a thread for progress updates and donations? Im sure thered be forthcoming donaters.

Ye it wouldn't be fair if D3 was left out

I think it is possible to just cut and paste until we get something solid for us right now.
Sent from my XT862 using XDA

^ joke?
Sent from my XT862 using Tapatalk

MrObvious said:
I think it is possible to just cut and paste until we get something solid for us right now.
Sent from my XT862 using XDA
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Click to collapse
Hmm...no.
Sent from my Galaxy Nexus using xda premium

Lol I'm messing duh.
Sent from my XT862 using XDA

Willis111 said:
I think could try hash kindle kernel or even just use the .config from the 2.3.6 posted by moto and fill in the new options. Pretty sure the kernel itself will be easy once kexec is working
Click to expand...
Click to collapse
I really wish it was that easy. :/ Unfortunately, in many cases kernel changes == userspace binary changes in the OS. And for those, I have no source. So if that item has been customized by Moto.. we're back to some of the hackery that we have now.
Something to keep in mind when checking out how the Kindle works: I was able to drop all of the Amazon custom binaries in favor of generic Texas Instruments alternatives. The Amazon customized android binaries had viable "from source" alternatives in almost every case. There is no way this would be possible for a Moto device. Too much customized hardware/software in the way.
And the Kindle is almost a play toy compared to a phone device. I didn't need to worry about:
Light sensors
Bluetooth
3g Modem
Keyboard
Camera
Etc
And while the base CPU is identical, everything changes from there:
Different charging driver
Battery gauge
LCD driver
Touchscreen driver
Audio driver
Wifi chip is even different and that's supposed to be part of the "system on a chip"
That being said, I know the D3 is probably in the worst looking shape regarding an update from Moto. And, I'm sort of mulling over how to do it right.
While I could probably do a few tweaks to a kexec kernel for:
- graphics drivers which fully support ICS (see: Chrome, RenderScript, etc)
- *maybe* get the backport working for open source hw codecs to support flash, netflix, etc. (I have a good bit of this done as kernel modules from back in January.. just didn't know why they were failing at the time)
But, I'm not sure it's worth the additional effort if we don't get things like camera / video recording working (will probably need custom Moto source for codecs -- open source won't do it). And updating the hw codec engine above would most likely break the current camera hack entirely.
I guess, I would need to see if Moto has any sort of upgrade path for the Droid 3. If they do, then I'd say hang tight and I'll get it integrated once they release something.
Otherwise, we as a community need to decide if a phone which is more ICS friendly but doesn't have a camera is worth it.
Maybe the answer is: finish the CM7 port into something which is more functional and bugfree.
Sent from my XT894 using Tapatalk 2

Hashcode said:
I really wish it was that easy. :/ Unfortunately, in many cases kernel changes == userspace binary changes in the OS. And for those, I have no source. So if that item has been customized by Moto.. we're back to some of the hackery that we have now.
Something to keep in mind when checking out how the Kindle works: I was able to drop all of the Amazon custom binaries in favor of generic Texas Instruments alternatives. The Amazon customized android binaries had viable "from source" alternatives in almost every case. There is no way this would be possible for a Moto device. Too much customized hardware/software in the way.
And the Kindle is almost a play toy compared to a phone device. I didn't need to worry about:
Light sensors
Bluetooth
3g Modem
Keyboard
Camera
Etc
And while the base CPU is identical, everything changes from there:
Different charging driver
Battery gauge
LCD driver
Touchscreen driver
Audio driver
Wifi chip is even different and that's supposed to be part of the "system on a chip"
That being said, I know the D3 is probably in the worst looking shape regarding an update from Moto. And, I'm sort of mulling over how to do it right.
While I could probably do a few tweaks to a kexec kernel for:
- graphics drivers which fully support ICS (see: Chrome, RenderScript, etc)
- *maybe* get the backport working for open source hw codecs to support flash, netflix, etc. (I have a good bit of this done as kernel modules from back in January.. just didn't know why they were failing at the time)
But, I'm not sure it's worth the additional effort if we don't get things like camera / video recording working (will probably need custom Moto source for codecs -- open source won't do it). And updating the hw codec engine above would most likely break the current camera hack entirely.
I guess, I would need to see if Moto has any sort of upgrade path for the Droid 3. If they do, then I'd say hang tight and I'll get it integrated once they release something.
Otherwise, we as a community need to decide if a phone which is more ICS friendly but doesn't have a camera is worth it.
Maybe the answer is: finish the CM7 port into something which is more functional and bugfree.
Sent from my XT894 using Tapatalk 2
Click to expand...
Click to collapse
I personally would love to see cm7 finished. For myself without working video I can't use ics as a daily driver, I need to use skype on my device often. And although its been awhile since I've used ics the battery life was pretty poor compared to gb
Sent from my XT860 using xda premium

If CM9 can be made to work with everything (flash, HW codecs) bar Video that would do me.
Otherwise CM7 completion gets my vote.

Also, how about when Bionic ICS hits? And are RAZR camera/hw codecs of no use?

CM7!
Sent from my DROID3 using XDA

slvrarrow said:
Also, how about when Bionic ICS hits? And are RAZR camera/hw codecs of no use?
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Click to collapse
Turns out the hwcodecs and kernel will be useless for Droid 3. This was something that I learned recently while building the new kernel to the Kindle Fire.
All of the settings in the new 3.0 kernels from TI are hard coded to 1GB RAM. Including the hw codec binary. For the Kindle I had to do quite a bit of rework and dynamic tiler modifications to get ICS running on it correctly.

Can't you use a 2.x Kernel?

slvrarrow said:
Can't you use a 2.x Kernel?
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Click to collapse
I don't think so, I believe ICS depends upon a 3.0 kernel, which is why he's been having such a hard time getting everything to work. He has to rewrite ICS code to work with what we have in our kernel that is meant for Gingerbread.

cm9 nightly droid 3 overclock

Ok I've been trying to overclock this phone a nice how to would ne awsome so Iam running cm9 nightly latest from hash of codes I would like to change cpu speed any way to modify this. I'm not new to android but obviosly am no dev how to use terminal emulator to achive this I'm running the dev/tty the not shure what command to use from there. Or possiblie a module or script to run thnx

Some users are finding they're "overclocked" out of the box on the new builds. If I recall correctly speed is bogomips x 2, so you're already 20% faster than some users. This is likely due to TI/Motorola binning the chips, but it may also have been done to prevent overheating elsewhere in the system even if the CPU is capable. All the overclocked ROMs I've seen have gone as far as the 1.2GHz mark so we may be maxed out at this point due to limitations elsewhere.
Sent from my DROID3 using xda app-developers app

thnx for the feedback how do i run the commands in terminal emu
I need to see the code for this
But not shure what to type in to bring up The spot where all the data is stored for the cpu commands or to see the kernel info also I can try to determin from there I'm trying to see if not I got the sbf no worries for me at all any who I'm trying to get all the people together to work this lil thing out of cm9 try to get this going for peps who wanna save battery and go faster. I open chmod in terminal but where do Igo from there or if im even going the right direction please help

You are going to have to build it in to your rom or you can use one of TeamHaters CM9 roms. The kexec roms will not support any overclocking at the moment.
http://forum.xda-developers.com/showthread.php?t=1341514

Ery
jesusishere said:
You are going to have to build it in to your rom or you can use one of TeamHaters CM9 roms. The kexec roms will not support any overclocking at the moment.
http://forum.xda-developers.com/showthread.php?t=1341514
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Click to collapse
Its been very unstable teamhaters has got any link to the latest one iwould really like to try to find something stable enough a daily driver some one ics needs underclock to save more battery and overclock.to mash out savage games on lol but all in all Ijust wanna fiddle with my droid lol

Geez, why is people so obsessed with overclocking?
Why don't you wait until we have a more stable rom?
Is not like a couple of hundred of mhz are going to make much of a difference at this point.

N do ithashcode xt862 cm9 nightly overclock with terminalsessed with overclocking?
Why don't you wait until we have a more stable rom?
Is not like a couple of hundred of mhz are going to make much of a difference at this point.[/QUOTE]
Cuase to further play aka tinker with phone also to save battery with undervolt for instance but all in all to say Idid it lol gimme a reason why not lol.there is a reason for sbf cdma workshop lol and other tools hmmmmm you got any other interesting things for me to laugh at just write so now back to gettin this to do its oc and undervolt. Stuff some one out there's got a crazy brain help us out here folks to see if it will run stable enough and truthfully my new friend oc could reall bump my output for running 20 things at once lol but in all seriousness Iwant to prove to steve at cyan its ready for it beyond that to get a module script or something out there to satisfy the hunger for oc and undervolt its amazing what the kexec kernel has achived so let's push the envelope we need to get the little extras out of it

whiterabbit1 said:
Cuase to further play aka tinker with phone also to save battery with undervolt for instance but all in all to say Idid it lol gimme a reason why not lol.there is a reason for sbf cdma workshop lol and other tools hmmmmm you got any other interesting things for me to laugh at just write so now back to gettin this to do its oc and undervolt. Stuff some one out there's got a crazy brain help us out here folks to see if it will run stable enough and truthfully my new friend oc could reall bump my output for running 20 things at once lol but in all seriousness Iwant to prove to steve at cyan its ready for it beyond that to get a module script or something out there to satisfy the hunger for oc and undervolt its amazing what the kexec kernel has achived so let's push the envelope we need to get the little extras out of it
Click to expand...
Click to collapse
Yes, of course, you're sure leading the innovation and development.
You're just a spoiled brat asking for something you don't fully understand.
Overclocking our device is not going to make great differences now or even when it's stable.
To "run 20 things at once" we need RAM, not processor speed.
Overclocking doesn't save battery either.
Why do I even bother.

SeiferTV said:
Yes, of course, you're sure leading the innovation and development.
You're just a spoiled brat asking for something you don't fully understand.
Overclocking our device is not going to make great differences now or even when it's stable.
To "run 20 things at once" we need RAM, not processor speed.
Overclocking doesn't save battery either.
Why do I even bother.
Click to expand...
Click to collapse
That's why I don't
Sent from my XT860 using xda premium

SeiferTV said:
Yes, of course, you're sure leading the innovation and development.
You're just a spoiled brat asking for something you don't fully understand.
Overclocking our device is not going to make great differences now or even when it's stable.
To "run 20 things at once" we need RAM, not processor speed.
Overclocking doesn't save battery either.
Why do I even bother.
Click to expand...
Click to collapse
The argument of getting tasks done x% quicker while using 0.x% more battery etc? Just noticed my xt860 is reporting 1.2ghz max in system tuner etc.

I just wondered since some people said it happened to them and not me.
Sent from my XT883 using xda app-developers app

MrObvious said:
I just wondered since some people said it happened to them and not me.
Sent from my XT883 using xda app-developers app
Click to expand...
Click to collapse
Some CPU's are marked at e-fuse level to be not stable on speeds higher than 1ghz on the factory, and the kexec kernel seems to be addressing that, according to a comment made on the kexec rom thread.

Willis111 said:
The argument of getting tasks done x% quicker while using 0.x% more battery etc? Just noticed my xt860 is reporting 1.2ghz max in system tuner etc.
Click to expand...
Click to collapse
Ok so I ran a different rom and made shure I had a butload of stuff running and I mean a bunch gran theft auto nova 2 all kinds of stuff and at 1ghz and got a bunch of lag then bumped it up to 1.2ghz and how about that a lot less lag the extra .400 helps process the full load so as award spoiled I work stupid hard for what I got and everyone I know can vouch for me on that its a blessing from god the things I have anyway this pissing contest is over let's try getting this done guys it would be nice to run overclock for more responsive and fluid user interface

whiterabbit1 said:
Ok so I ran a different rom and made shure I had a butload of stuff running and I mean a bunch gran theft auto nova 2 all kinds of stuff and at 1ghz and got a bunch of lag then bumped it up to 1.2ghz and how about that a lot less lag the extra .400 helps process the full load so as award spoiled I work stupid hard for what I got and everyone I know can vouch for me on that its a blessing from god the things I have anyway this pissing contest is over let's try getting this done guys it would be nice to run overclock for more responsive and fluid user interface
Click to expand...
Click to collapse
Holy run-on sentence Batman!
Sent from my DROID3 using xda app-developers app

whiterabbit1 said:
Ok so I ran a different rom and made shure I had a butload of stuff running and I mean a bunch gran theft auto nova 2 all kinds of stuff and at 1ghz and got a bunch of lag then bumped it up to 1.2ghz and how about that a lot less lag the extra .400 helps process the full load so as award spoiled I work stupid hard for what I got and everyone I know can vouch for me on that its a blessing from god the things I have anyway this pissing contest is over let's try getting this done guys it would be nice to run overclock for more responsive and fluid user interface
Click to expand...
Click to collapse
Only about half of that makes sense
Sent from my XT860 using xda premium

Endoroid said:
Only about half of that makes sense
Sent from my XT860 using xda premium
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Auto spell darn that auto spell lol sorry hey if kang builds and aosp have oc then why not cm9?

whiterabbit1 said:
Auto spell darn that auto spell lol sorry hey if kang builds and aosp have oc then why not cm9?
Click to expand...
Click to collapse
Spelling isn't the problem. Try some punctuation.
Because cm9 is meant to be stable and fast. Since various devices react differently to being overclocked, it would introduce instabilities in some devices. That's why the performance section of settings in cm roms says, if you change these settings, do not file bug reports. Once kexec cm9 is fully operational, im sure someone will build a oc kernel
Sent from my XT860 using xda premium

Endoroid said:
Spelling isn't the problem. Try some punctuation.
Because cm9 is meant to be stable and fast. Since various devices react differently to being overclocked, it would introduce instabilities in some devices. That's why the performance section of settings in cm roms says, if you change these settings, do not file bug reports. Once kexec cm9 is fully operational, im sure someone will build a oc kernel
Sent from my XT860 using xda premium
Click to expand...
Click to collapse
Yay ill be sooooooooo happy when they do ok guys its my birthday and imma blow out the candles and wish for oc lol:good: