speed boost and battery boost as well

[Guest fards]

anyone else see this?

I haven't tried it mainly because I can't find sysctl but wondered if there were Any thoughts on it?

http://nenolod.net/how-to-improve-user-per...android-phones/

____________

UPDATE

What it does is really improve responsiveness, and according to most who've tried it, helps lots with battery life

** to try experimenting with these tweaks you need root and busybox.. **

these are the settings that work best for me on the streak

in adb shell or a shell on the STREAK

$ su

# mount -o remount,rw /system

# echo 'kernel.sched_latency_ns = 6000000' >> /etc/sysctl.conf

# echo 'kernel.sched_min_granularity_ns = 2000000' >> /etc/sysctl.conf

# echo 'kernel.sched_features = 24188' >> /etc/sysctl.conf

# mount -o remount,ro /system

# sysctl -p

kernel.sched_latency_ns = 6000000

kernel.sched_min_granularity_ns = 2000000

kernel.sched_features = 24188

# exit

$ exit

EDIT kernel.sched_latency_ns = 6000000 is a "safe" amount that gives a boost, 3000000 gives a much higher quadrant score (av 875 max 885 for me) but needs more testing You can also try these tweaks, I'm still undecided as to whether they kill the battery or not, but wifi seems happier

net.ipv4.tcp_keepalive_time = 900

net.ipv4.tcp_keepalive_probes = 5

net.ipv4.tcp_keepalive_intvl = 156

to make these stick after reboot on the streak Edit /system/bin/run_autorun_test.sh put

sysctl -p

in that file to make them stick on reboot.

____________________________________

as an alternative you can create the two files on your pc and copy them across to the streak, but adb shell is neater way of doing it

---------------------

they are only permanent while they reside in /etc/sysctl.conf

http://www.centos.org/docs/4/4.5/Reference...roc-sysctl.html

after a couple of days I'm finding battery life much much better as has Davehod,

so I've renamed the thread..

Edited September 15, 2010 by fards

[Guest fards]

okies I've just tried this and it does seem more responsive on Pauls MCR, wether its placebo or not I don't know.

Certainly seems quicker.

just going to run some benchmarks

linpack 6.98

quadrant isn't completing

Edited September 6, 2010 by fards

[Guest jutley]

Paul how about you apply this in your next mcr?

[Guest spences10]

anyone else see this?

I haven't tried it mainly because I can't find sysctl but wondered if there were Any thoughts on it?

http://nenolod.net/how-to-improve-user-per...android-phones/

Top find fards!!

Handset still out for repair but will try this when it comes back > if this works then no need for JIT hack

In the comments there is talk about BFS and CFS how do we know which kernel we have??

[Guest twe]

edit: Doh reading between the Streak and Desire threads causing some confusion

Edited September 6, 2010 by twe

[Guest fards]

on further testing, I don't think these two are good for the streak

kernel.sched_latency_ns = 600000

kernel.sched_min_granularity_ns = 400000

seems to lag occassionally

I'll play some more later on.

[Guest Meltus]

'/etc/sysctl.conf' doesn't exist and is never read from if created. Sysctl doesn't actually exist anywhere on the phone either.

I dont think this works with our stock kernel.

[Guest fards]

'/etc/sysctl.conf' doesn't exist and is never read from if created. Sysctl doesn't actually exist anywhere on the phone either.

I dont think this works with our stock kernel.

if you do the instructions the conf is created and teh weird thing is sysctl does work across adb shell..

although I couldn't find it either, which is why I didn't do it from the outset.

[Guest Meltus]

if you do the instructions the conf is created and teh weird thing is sysctl does work across adb shell..

although I couldn't find it either, which is why I didn't do it from the outset.

hmmm still doesn't work for me, i just get "sysctl: not found".

What ROM are you using? if you are using Paul's, he might have added sysctl support in or something :P

[Guest fards]

hmmm still doesn't work for me, i just get "sysctl: not found".

What ROM are you using? if you are using Paul's, he might have added sysctl support in or something :P

yeah I am on r2

he could have done, but I can't find it and its not on busybox..

looks like a useful command though

I'll dump

sysctl -a lots of goodies revealed by that one.. :)

sysctl.txt

Edited September 6, 2010 by fards

[Guest fards]

FWIW i've now dropped back to the stock for these

kernel.sched_latency_ns = 600000

kernel.sched_min_granularity_ns = 400000

which are

kernel.sched_min_granularity_ns = 4000000

kernel.sched_latency_ns = 10000000

and quadrant is completing with runs of upto 820 depending on what's running.

I may experiment with different values to see if it makes any difference. .

kernel.sched_latency_ns = 6000000

kernel.sched_min_granularity_ns = 2000000

makes no difference to benchmarks, but quadrant at least runs so I guess is a "safe" minimum

Edited September 6, 2010 by fards

[Guest davehod]

yeah I am on r2

he could have done, but I can't find it and its not on busybox..

looks like a useful command though

I'll dump

sysctl -a lots of goodies revealed by that one.. :P

I was playing with unyaffs on a couple of system images a few days ago - bin directory of one of the images had a sysctl file.

Only 52 bytes long and viewing it with a text editor reveals what looks like symlink to Busybox. Attached here with bluff txt ending to enable upload.

Sadly I can't tell ya which rom it is in apart from that it was one of the 2.1 uk builds (twas late at night when I unyaffed em...).

sysctl_bluff_txt_ending.txt

[Guest fards]

I was playing with unyaffs on a couple of system images a few days ago - bin directory of one of the images had a sysctl file.

Only 52 bytes long and viewing it with a text editor reveals what looks like symlink to Busybox. Attached here with bluff txt ending to enable upload.

Sadly I can't tell ya which rom it is in apart from that it was one of the 2.1 uk builds (twas late at night when I unyaffed em

Cheers.

Gone back and had a look, sysctl its in the latest busybox.

So to try experimenting with these tweaks you need root and busybox..

[Guest davehod]

Cheers.

Gone back and had a look, sysctl its in the latest busybox.

So to try experimenting with these tweaks you need root and busybox..

Yep, just had a look at the build.prop in the image and it was the 6941 build which has busybox. The other system img I extracted was the 7546 build - no busybox and no symlink to sysctl. There's less stuff in the bin directory in the later build - guessing the developers were tidying up a bit to reduce the img size.

[Guest fards]

So anyone else tried it? Any other s r experiences using it. With the the stock dell timing and just the fetaures set its rock solid

[Guest davehod]

So anyone else tried it? Any other s r experiences using it. With the the stock dell timing and just the fetaures set its rock solid

I've tried the following in the sysctrl.conf

kernel.sched_latency_ns = 10000000

kernel.sched_min_granularity_ns = 4000000

kernel.sched_features = 24188

vm.swappiness = 0

vm.dirty_expire_centisecs = 0

vm.dirty_writeback_centisecs = 0

vm.dirty_background_ratio = 60

vm.dirty_ratio = 95

#vm.oom_kill_allocating_task = 1 - I don't trust this one...

vm.vfs_cache_pressure = 10

second set of params based on a thread on xda -

http://forum.xda-developers.com/showthread.php?t=523707

The threads a bit old and there's some disagreement on the validity/safety of some of the settings - recommend you read the whole thread.

These settings have bumped up my quadrant scores by about 50 on average (compared to 8501 rooted O2 build without sysctl mods).

That said, there's a fair degree of variation on scores from run to run (I get between 750 - 850) and quadrant seems to interfere with the orientation sensor so I reboot between runs.

Seems stable enough so far and subjectively a bit more responsive - dunno about impact on battery yet.

Another consideration here is how you use the device - if you've got a lot of apps running, changing these settings could actually reduce performance.

Would guess the Dell defaults are conservative, sacrificing peak performance for stability and a wide range of usage scenarios.

I'm not a Unix/kernel expert so do your own research and form your own conclusions before messing around (comment not aimed at you fards, from reading your other posts I know you do!).

[Guest fards]

I've tried the following in the sysctrl.conf

kernel.sched_latency_ns = 10000000

kernel.sched_min_granularity_ns = 4000000

kernel.sched_features = 24188

vm.swappiness = 0

vm.dirty_expire_centisecs = 0

vm.dirty_writeback_centisecs = 0

vm.dirty_background_ratio = 60

vm.dirty_ratio = 95

#vm.oom_kill_allocating_task = 1 - I don't trust this one...

vm.vfs_cache_pressure = 10

second set of params based on a thread on xda -

http://forum.xda-developers.com/showthread.php?t=523707

The threads a bit old and there's some disagreement on the validity/safety of some of the settings - recommend you read the whole thread.

These settings have bumped up my quadrant scores by about 50 on average (compared to 8501 rooted O2 build without sysctl mods).

That said, there's a fair degree of variation on scores from run to run (I get between 750 - 850) and quadrant seems to interfere with the orientation sensor so I reboot between runs.

Seems stable enough so far and subjectively a bit more responsive - dunno about impact on battery yet.

Another consideration here is how you use the device - if you've got a lot of apps running, changing these settings could actually reduce performance.

Would guess the Dell defaults are conservative, sacrificing peak performance for stability and a wide range of usage scenarios.

I'm not a Unix/kernel expert so do your own research and form your own conclusions before messing around (comment not aimed at you fards, from reading your other posts I know you do!).

The ns you tried are the stock.. :P

Having spent the entire day on the last settings I suggested, I reckon if nothing else battery life is a better. 78 % at the mo!

Oh yeah AV 860 in quaDrant. But I'm not getting the huge variations you are, Max 866

Glad to see I'm not the only one playing Dave :) the cache pressure looks interesting

Edited September 7, 2010 by fards

[Guest fards]

some background reading on the VM settings.

http://bit.ly/aKp0zg

[Guest spences10]

@fards

chap, have your setting changed from the original post?

or are this the definitive settings atm?

thanks.

[Guest fards]

@fards

chap, have your setting changed from the original post?

or are this the definitive settings atm?

thanks.

I'm using

kernel.sched_features = 24188 ---definite

kernel.sched_latency_ns = 6000000 \

kernel.sched_min_granularity_ns = 2000000 / these two I've not decided which is best, I'm going to start dropping them lower till I get issues.

and experimenting with

vm.vfs_cache_pressure = 10

vm.laptop_mode=1

one of the latter is causing some issues, not certain which yet.. I may drop both of them

[Guest spences10]

its all gone a bit slow now, i dont suppose anyone took a note of the original settings before changing them?

[Guest fards]

its all gone a bit slow now, i dont suppose anyone took a note of the original settings before changing them?

If you used sysctl.conf then delete its contents and reboot

[Guest spences10]

If you used sysctl.conf then delete its contents and reboot

What? like:

su

cd /system/etc/

rm sysctl.conf

Or just delete the file with Root Explorer?

[Guest fards]

What? like:

su

cd /system/etc/

rm sysctl.conf

Or just delete the file with Root Explorer?

I dunno, I just left the file there with blank contents ..

[Guest spences10]

Thanks fards,

Still Really slow 0_o quadrant benchmark of 314!!!

Do you have any record of the default settings? thanks