The kernel patch that does wonders

crocowhile · 2010-11-16 15:58:22

Anyone tried this yet?

http://www.phoronix.com/scan.php?page=a … 2637_video

ngoonee · 2010-11-16 16:06:34

It looks like it patches against 2.6.37 at least, and I only know of one kernel26-* package in the AUR that is there currently. So no, you'd probably have to wait a bit.

crocowhile · 2010-11-16 16:09:48

I am compiling right now. If it works as described I'll make a AUR package myself. 10x improvement is not something I'd wait for too long.

praavDa · 2010-11-16 16:13:19

Hello,

Has anyone tried to run custom kernel with the patch mentioned in this phoronix article: http://www.phoronix.com/scan.php?page=a … 2637_video ?

Does this patch really "does wonders" or at least makes a difference in responsivenes of linux desktops?

Last edited by praavDa (2010-11-16 16:13:38)

linux-ka · 2010-11-16 16:23:35

looks promising! If this can be integrated without any flaw....yeaharr let's compile it baby! but will this patch useful for older processors ( < I 3/5/7 )?

Further...is there any place to get this patch or do we have to copy it from this mail-list ?

falconindy · 2010-11-16 16:58:12

I wouldn't touch this just yet -- though the idea appears to be sound, it's still in need of some polishing. Read the LKML thread if you want more detail. If you just want to skip ahead to where the problems are discovered, start here.

edit: Didn't bother to look at the dates on the LKML thread... Silly me. I'd still be careful as there's at least a half dozen versions of the patch on that thread, some of them with evil repercussions, and who knows what else will show up. This is certainly something to look forward to for 2.6.38, though.

Last edited by falconindy (2010-11-16 17:06:03)

birdspider · 2010-11-16 17:21:04

Hi,

does anyone know if this does any good for low-perfomance cpus ? I currently use kernel26-n130 ( CK patchset) on an atom cpu.
Any ideas how CK and Mike Galbraith's compare? or if comparison makes sense ?

Google · 2010-11-16 18:00:26

The new patch is for group scheduling under CFS, correct? Does anyone know if this patch will work under BFS? I think BFS only has a priority group and a standard group?

DonVla · 2010-11-16 18:53:25

crocowhile wrote:

I am compiling right now. If it works as described I'll make a AUR package myself. 10x improvement is not something I'd wait for too long.

And crocowhile? Share the magic . . .

Jacek Poplawski · 2010-11-16 20:11:07

Where is compiled Arch kernel with this patch?

Jurassic · 2010-11-16 21:13:36

DonVla wrote:

crocowhile wrote:
I am compiling right now. If it works as described I'll make a AUR package myself. 10x improvement is not something I'd wait for too long.
And crocowhile? Share the magic . . .

I guess it didn't go too well

crocowhile · 2010-11-16 21:40:51

aha. no, I am still alive. The kernel is compiled but I didn't have time to start it up and compare yet. A small baby with a stomach bug is incompatible with any form of kernel hacking. Also, the computer I have at home is old; at work I have a i7 and I better try that one anyway.

Jurassic · 2010-11-16 22:32:56

crocowhile wrote:

aha. no, I am still alive. The kernel is compiled but I didn't have time to start it up and compare yet. A small baby with a stomach bug is incompatible with any form of kernel hacking. Also, the computer I have at home is old; at work I have a i7 and I better try that one anyway.

Sorry to hear abt the baby, but...you're not going to keep us waiting till tomorrow, are you?? Got a PKGBUILD to share?

pyther · 2010-11-16 22:50:14

^^
Here you go
1. git clone git://kernel.org/sources (use the actual url, I dunno what it is off the top of my head)
1.5: make xconfig
2. make -jX
3. make modules install
4. cp arch/${ARCH}/bzImage /boot/bzImage-2010-11-16-git
5. mkinitcpio --with-your-needed-options
6. Edit menu.list

Bang, bang, boom

Last edited by pyther (2010-11-16 22:54:45)

ChoK · 2010-11-17 01:55:06

Zen-kernel and liquorix should have picked the patch up by now but unfortunately the site is down ....

slytux · 2010-11-17 03:27:38

The patch isn't in 2.6.37-rc2 as per the article. Have a look at the kernel's source code and you'll see that the files the patch modifies aren't changed (yet).

These are the files the patch changes from http://marc.info/?l=linux-kernel&m=128978361700898&w=2
---
Documentation/kernel-parameters.txt | 2
drivers/tty/tty_io.c | 1
include/linux/sched.h | 19 ++++
init/Kconfig | 12 +++
kernel/fork.c | 5 +
kernel/sched.c | 25 ++++--
kernel/sched_autogroup.c | 140 ++++++++++++++++++++++++++++++++++++
kernel/sched_autogroup.h | 18 ++++
kernel/sysctl.c | 11 ++
9 files changed, 224 insertions(+), 9 deletions(-)

So, you just have to create it manually. Simply copy and paste into a text file beginning with the line 'Index: linux-2.6/include/linux/sched.h' to the end.

The build procedure should be the same after you get, extract, and apply the patch.

$ cd to your linux source
(Assuming you have created the patch file called patch.txt in the parent of where you just extracted the kernel sources).
$ patch -p1 < ../patch.txt

patching file include/linux/sched.h
Hunk #3 succeeded at 1935 (offset -1 lines).
patching file kernel/sched.c
Hunk #2 succeeded at 616 (offset 10 lines).
Hunk #3 succeeded at 2020 (offset 10 lines).
Hunk #4 succeeded at 7967 (offset -17 lines).
Hunk #5 succeeded at 8497 (offset -17 lines).
Hunk #6 succeeded at 8522 (offset -17 lines).
patching file kernel/fork.c
patching file drivers/tty/tty_io.c
patching file kernel/sched_autogroup.h
patching file kernel/sched_autogroup.c
patching file kernel/sysctl.c
patching file init/Kconfig
patching file Documentation/kernel-parameters.txt

Last edited by slytux (2010-11-17 04:45:50)

crayxt · 2010-11-17 09:10:05

Running 2.6.37-rc2 with this patch now (http://mail.kazgrid.kz/repo/i686/kernel … pkg.tar.xz)

How do I check, whether this patch is working or not?

make -j64 and Youtube shows videos nice

Last edited by crayxt (2010-11-17 09:24:23)

snoopy33 · 2010-11-17 09:21:15

crayxt wrote:

Running 2.6.37-rc2 with this path now (http://mail.kazgrid.kz/repo/i686/kernel … pkg.tar.xz)
How do I check, whether this patch is working or not?
make -j64 and Youtube shows videos nice

cat /proc/sys/kernel/sched_autogroup_enabled
(I take it from a forum)

Last edited by snoopy33 (2010-11-17 09:21:48)

crayxt · 2010-11-17 09:24:05

$ cat /proc/sys/kernel/sched_autogroup_enabled
1

combuster · 2010-11-17 09:54:15

I've applied it on 2.6.37-rc2 (the dev of this patch applied it on 2.6.36), I can say that it works great.

With make -j64 I can browse, listen to music and all of that without hickups. Swap stays relatively small (~10MB)

Without this patch the whole desktop becomes totally unusable, I barely can close the browser, swap goes skyhigh...

We will se what will become of this

SanskritFritz · 2010-11-17 10:25:00

Zen stable git has included the patch 3 days ago
http://git.zen-kernel.org/zen-stable/log/?h=cfs
But we BFS users don't care

spicausis · 2010-11-17 12:46:35

As nobody seems to tell how they built the wonderous kernel, here's my way. This is a first time I build a kernel under arch, so ymmv, things can be done better, yada yada, hope it helps somebody.

1. built and installed linux-firmware-git from AUR,

2 - 5. took a source package of kernel26-git (yaourt -G kernel26-git), mkdir patches, pasted the magic patch into patches/magic.patch, and makepkg -i.
In the menuconfig checked "Automated process group scheduling", exited menuconfig and waited... waited... waited...

6. In /boot/menu/grub.conf copied and pasted the first entry to a new one,

title  Das Experiment
root   (hd0,0)
kernel /vmlinuz26-git root=/dev/disk/by-uuid/b53854c4-f022-437a-a53d-580f288fdc6b ro
initrd /kernel26-git.img

7. Rebooted, select Das Experiment at the grub prompt
8. cursed a bit, switched to nouveau
9. profit!

madgnu · 2010-11-17 13:15:03

Patch for 2.6.36

presario · 2010-11-17 13:23:19

@madgnu
The link seems broken.

jskier · 2010-11-17 14:29:42

presario wrote:

@madgnu
The link seems broken.

Works for me.

Arch Linux

#1 2010-11-16 15:58:22

The kernel patch that does wonders

#2 2010-11-16 16:06:34

Re: The kernel patch that does wonders

#3 2010-11-16 16:09:48

Re: The kernel patch that does wonders

#4 2010-11-16 16:13:19

Re: The kernel patch that does wonders

#5 2010-11-16 16:23:35

Re: The kernel patch that does wonders

#6 2010-11-16 16:58:12

Re: The kernel patch that does wonders

#7 2010-11-16 17:21:04

Re: The kernel patch that does wonders

#8 2010-11-16 18:00:26

Re: The kernel patch that does wonders

#9 2010-11-16 18:53:25

Re: The kernel patch that does wonders

#10 2010-11-16 20:11:07

Re: The kernel patch that does wonders

#11 2010-11-16 21:13:36

Re: The kernel patch that does wonders

#12 2010-11-16 21:40:51

Re: The kernel patch that does wonders

#13 2010-11-16 22:32:56

Re: The kernel patch that does wonders

#14 2010-11-16 22:50:14

Re: The kernel patch that does wonders

#15 2010-11-17 01:55:06

Re: The kernel patch that does wonders

#16 2010-11-17 03:27:38

Re: The kernel patch that does wonders

#17 2010-11-17 09:10:05

Re: The kernel patch that does wonders

#18 2010-11-17 09:21:15

Re: The kernel patch that does wonders

#19 2010-11-17 09:24:05

Re: The kernel patch that does wonders

#20 2010-11-17 09:54:15

Re: The kernel patch that does wonders

#21 2010-11-17 10:25:00

Re: The kernel patch that does wonders

#22 2010-11-17 12:46:35

Re: The kernel patch that does wonders

#23 2010-11-17 13:15:03

Re: The kernel patch that does wonders

#24 2010-11-17 13:23:19

Re: The kernel patch that does wonders

#25 2010-11-17 14:29:42

Re: The kernel patch that does wonders

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