World of Warcraft FPS drop every 15 seconds.

vor_lord · 2008-02-26 05:22:55

shazeal wrote:

I did some playing around and enabled SCHED_DEBUG in both 2.6.23 and 2.6.24 the problem is with the tunables in 2.6.24.
2.6.23 Tunables
kernel.sched_features=21
kernel.sched_batch_wakeup_granularity_ns=25000000
kernel.sched_min_granularity_ns=4000000
2.6.24 Tunables
kernel.sched_features=7
kernel.sched_batch_wakeup_granularity_ns=20000000
kernel.sched_min_granularity_ns=8000000
Setting the 2.6.24 tunables using sysctl to match the 2.6.23 ones solves the issue.

I'm trying to do this. I'm a longtime arch user but it just normally works so well I don't have to mess with anything so forgive my inexperience.

I took the PKGBUILD for 2.6.24 and added:

CONFIG_SCHED_DEBUG=y

to the config file and built the package using makepkg. Then I installed it using pacman -U. I realize I didn't follow a good naming convention for the kernel, but hey I'm just getting started and want to minimize any changes I make.

However, even though I can see that files in /boot were updated, the kconfig26 file there still lists CONFIG_SCHED_DEBUG as not set. There is no way to access these items from sysctl. Being new to this, what have I missed?

strongbad:brett/abs> diff -q kernel26 /var/abs/core/base/kernel26
Files kernel26/PKGBUILD and /var/abs/core/base/kernel26/PKGBUILD differ
Files kernel26/config and /var/abs/core/base/kernel26/config differ
Only in kernel26: kernel26-2.6.24.1-2-i686.pkg.tar.gz
Only in kernel26: linux-2.6.24.tar.bz2
Only in kernel26: patch-2.6.24.1.bz2
Only in kernel26: pkg
Only in kernel26: squashfs3.3.tar.gz
Only in kernel26: src
Only in kernel26: unionfs-2.2.2_for_2.6.24-rc7.diff.gz

strongbad:brett/abs> diff kernel26/PKGBUILD /var/abs/core/base/kernel26/PKGBUILD
66c66
<        '4fad3fc6b82717a4295b0ab049bd73e2'
---
>          '97c28c42ef2bbf8c9c6464a1e09eaf90'

strongbad:/boot> diff /boot/kconfig26 /home/brett/abs/kernel26/config
4c4
< # Mon Feb 25 21:04:24 2008
---
> # Fri Jan 25 08:01:32 2008
67a68,71
> # CONFIG_CGROUP_DEBUG is not set
> # CONFIG_CGROUP_NS is not set
> # CONFIG_CGROUP_CPUACCT is not set
> # CONFIG_CPUSETS is not set
68a73,75
> # CONFIG_FAIR_USER_SCHED is not set
> # CONFIG_FAIR_CGROUP_SCHED is not set
> # CONFIG_SYSFS_DEPRECATED is not set
964d970
<
1010a1017
> # CONFIG_XEN_BLKDEV_FRONTEND is not set
1689a1697
> # CONFIG_XEN_NETDEV_FRONTEND is not set
2024a2033
> # CONFIG_HVC_XEN is not set
2890a2900
>
3538a3549
> CONFIG_SCHED_DEBUG=y

Last edited by vor_lord (2008-02-26 05:45:04)

vor_lord · 2008-03-01 23:54:13

vor_lord wrote:

I took the PKGBUILD for 2.6.24 and added:
CONFIG_SCHED_DEBUG=y
to the config file and built the package using makepkg. Then I installed it using pacman -U. I realize I didn't follow a good naming convention for the kernel, but hey I'm just getting started and want to minimize any changes I make.
However, even though I can see that files in /boot were updated, the kconfig26 file there still lists CONFIG_SCHED_DEBUG as not set. There is no way to access these items from sysctl. Being new to this, what have I missed?

Apparently leaving "# CONFIG_SCHED_DEBUG is not set" in the file makes a difference?

I took it out and rebuilt it, works great.

After shazeal's suggestions about tweaking the kernel tunables, my problem is fixed. Thanks very much.

Bestiapeluda · 2008-03-14 19:03:35

did anyone notice that this happens only when you are connected to a server?
I dont have any problem with the login screen. Only when when I have to choose a character.
And when Im playing and unplug my internet connection the stutter disappears.

Issh · 2008-03-14 19:57:31

aparently using zen-sources kernel fixes this

Bestiapeluda · 2008-03-15 12:59:28

ok ill try it today

did not work

Last edited by Bestiapeluda (2008-03-17 18:29:24)

Slash · 2008-03-17 07:18:39

I had the same problem. Like vor_lord says, all you have to do is rebuild kernel26 with ABS. Run "abs" as root. Copy the /var/abs/core/base/kernel26/ directory to somewhere in your normal user's home directory. Open the file "config" in a text editor of choice. Find the line that says:

# CONFIG_SCHED_DEBUG is not set

Replace with:

CONFIG_SCHED_DEBUG=y

Type "makepkg". Wait. Once it's done building, install it as root (or sudo) with pacman -U. As root, add this to /etc/sysctl.conf:

# Scheduler Variables to stop freezes every 15 seconds under wine+WoW
kernel.sched_features=21
kernel.sched_batch_wakeup_granularity_ns=25000000
kernel.sched_min_granularity_ns=4000000

Then reboot into teh newly built kernel. Worked for me

Last edited by Slash (2008-03-17 07:24:09)

Bestiapeluda · 2008-03-17 18:30:32

thank you slash it worked !!!!
where can i find info about the options i just changed ?

Slash · 2008-03-17 19:46:41

Not sure. shazeal is who figured out that those are the options that changed with the scheduler between kernel 2.6.23 and 2.6.24. As to specifically what each one does, I have no idea

shazeal wrote:

I did some playing around and enabled SCHED_DEBUG in both 2.6.23 and 2.6.24 the problem is with the tunables in 2.6.24.
2.6.23 Tunables
kernel.sched_features=21
kernel.sched_batch_wakeup_granularity_ns=25000000
kernel.sched_min_granularity_ns=4000000
2.6.24 Tunables
kernel.sched_features=7
kernel.sched_batch_wakeup_granularity_ns=20000000
kernel.sched_min_granularity_ns=8000000
Setting the 2.6.24 tunables using sysctl to match the 2.6.23 ones solves the issue.

nico1818 · 2008-03-20 19:31:41

Bestiapeluda wrote:

thank you slash it worked !!!!
where can i find info about the options i just changed ?

This article:

http://www.ibm.com/developerworks/linux/library/l-cfs/

introduces how the CFS scheduler works and explains briefly the runtime tunables. It is quite technical but interesting.

jeebusroxors · 2008-03-21 04:01:00

Mark down another success for this fix. I'm still having the stuck key issue in the other thread. No fixes for that yet?

Bestiapeluda · 2008-04-23 12:20:24

The problem persists in 2.6.25. Ill have to recompile this one too.

Themaister · 2008-07-22 20:15:47

Slash wrote:

I had the same problem. Like vor_lord says, all you have to do is rebuild kernel26 with ABS. Run "abs" as root. Copy the /var/abs/core/base/kernel26/ directory to somewhere in your normal user's home directory. Open the file "config" in a text editor of choice. Find the line that says:
# CONFIG_SCHED_DEBUG is not set
Replace with:
CONFIG_SCHED_DEBUG=y
Type "makepkg". Wait. Once it's done building, install it as root (or sudo) with pacman -U. As root, add this to /etc/sysctl.conf:
# Scheduler Variables to stop freezes every 15 seconds under wine+WoW
kernel.sched_features=21
kernel.sched_batch_wakeup_granularity_ns=25000000
kernel.sched_min_granularity_ns=4000000
Then reboot into teh newly built kernel. Worked for me

Wow, this worked! The bug is still present with newest kernel, so I thought I'd bump it
One thing, I had to remove md5sum in the PKGBUILD to accept the modified config file though. (Maybe that's common, dunno.)

Last edited by Themaister (2008-07-22 20:16:42)

mockfrog · 2008-07-23 19:16:07

I just disabled my idle loop fix, and tried again with standard kernel26 2.6.25.11-1 and it seems i can't reproduce the glitch any longer

Dunno why. Either the newer kernel did the trick or the last patch from Blizzard fixed the problem somehow.
I am going to downgrade my system to a known bad kernel and look if it comes back.

edit:
nope. problem vanished, even with old kernel, nvidia and wine.

Last edited by mockfrog (2008-07-23 20:23:49)

az7 · 2008-07-25 15:40:22

Using Slash's fix, I've copied /var/abs/core/kernel26 to my home directory and replaced "# CONFIG_SCHED_DEBUG is not set" with "CONFIG_SCHED_DEBUG=y". When I run makepkg I get the error "ERROR: One or more files did not pass the validity check!" Any ideas?

lucke · 2008-07-25 15:47:00

Just comment out the md5sum array or update it after running makepkg -g.

az7 · 2008-07-25 21:33:15

I edited the PKGBUILD file and commented out the md5 array, worked great. Thanks.

Themaister · 2008-07-26 00:27:10

Bah Thought this was fixed in 2.6.26 but no :\ Recompiling kernel ftl =P IgnorePkg = kernel26 here we go ...

asmodaous · 2008-07-29 11:29:52

Is there a step by step guide to fixing the CFS Scheduler. I am a newbie to Arch Linux and don't have a clue as to how to recompile. Overall I really like this Distro, just switched from Ubuntu after using that and linux for the first time 2 months ago and I'm learning tons of stuff, but for the most part when I am reading thread it's explained as if I should already know how to do most of this stuff. Eventually that will happen but there are still those of us who have to crawl before we walk.

nesrecar · 2008-07-30 07:33:10

I'll put a package in AUR that replaces kernel26, asmodaous.

Last edited by nesrecar (2008-07-30 07:40:21)

nesrecar · 2008-07-30 09:55:49

Should work without problems:

http://aur.archlinux.org/packages.php?ID=18724

Install file includes the information for sysctl.conf

Slash · 2008-07-30 22:59:40

There is kernel26-wow, as well: http://aur.archlinux.org/packages.php?ID=17195

One of these should probably be deleted

asmodaous · 2008-07-31 00:09:39

How do yo install the knew kernel26? Do you use any programs to do it? I have been reading about ABS is that something:) that I use and if so how? What are the commands for it?

nesrecar · 2008-07-31 05:41:45

Slash wrote:

There is kernel26-wow, as well: http://aur.archlinux.org/packages.php?ID=17195
One of these should probably be deleted

Haha, indeed. Will keep it in AUR until kernel26-wow will be updated.

asmodaous:

1) wget everything in a directory: http://aur.archlinux.org/packages/kerne … -fixedcfs/
2) do a makepkg
3) wait until package is built
4) pacman -U $package
5) follow the instructions which appear

asmodaous · 2008-07-31 07:33:41

Ok I just tried to update the kernel and I keep getting this messsage.....

[root@patrick-laptop kernel26-wow]# pacman -U kernel26-wow-2.6.25.4-2-i686.pkg.tar.gz
loading package data...
checking dependencies...
error: replacing packages with -A and -U is not supported yet
error: you can replace packages manually using -Rd and -U
error: failed to prepare transaction (conflicting dependencies)
:: kernel26-wow: conflicts with kernel26

nesrecar · 2008-07-31 07:40:22

Then remove it.

Please read this also: http://wiki.archlinux.org/index.php/Pac … g_Packages

Last edited by nesrecar (2008-07-31 07:40:47)

Arch Linux

#26 2008-02-26 05:22:55

Re: World of Warcraft FPS drop every 15 seconds.

#27 2008-03-01 23:54:13

Re: World of Warcraft FPS drop every 15 seconds.

#28 2008-03-14 19:03:35

Re: World of Warcraft FPS drop every 15 seconds.

#29 2008-03-14 19:57:31

Re: World of Warcraft FPS drop every 15 seconds.

#30 2008-03-15 12:59:28

Re: World of Warcraft FPS drop every 15 seconds.

#31 2008-03-17 07:18:39

Re: World of Warcraft FPS drop every 15 seconds.

#32 2008-03-17 18:30:32

Re: World of Warcraft FPS drop every 15 seconds.

#33 2008-03-17 19:46:41

Re: World of Warcraft FPS drop every 15 seconds.

#34 2008-03-20 19:31:41

Re: World of Warcraft FPS drop every 15 seconds.

#35 2008-03-21 04:01:00

Re: World of Warcraft FPS drop every 15 seconds.

#36 2008-04-23 12:20:24

Re: World of Warcraft FPS drop every 15 seconds.

#37 2008-07-22 20:15:47

Re: World of Warcraft FPS drop every 15 seconds.

#38 2008-07-23 19:16:07

Re: World of Warcraft FPS drop every 15 seconds.

#39 2008-07-25 15:40:22

Re: World of Warcraft FPS drop every 15 seconds.

#40 2008-07-25 15:47:00

Re: World of Warcraft FPS drop every 15 seconds.

#41 2008-07-25 21:33:15

Re: World of Warcraft FPS drop every 15 seconds.

#42 2008-07-26 00:27:10

Re: World of Warcraft FPS drop every 15 seconds.

#43 2008-07-29 11:29:52

Re: World of Warcraft FPS drop every 15 seconds.

#44 2008-07-30 07:33:10

Re: World of Warcraft FPS drop every 15 seconds.

#45 2008-07-30 09:55:49

Re: World of Warcraft FPS drop every 15 seconds.

#46 2008-07-30 22:59:40

Re: World of Warcraft FPS drop every 15 seconds.

#47 2008-07-31 00:09:39

Re: World of Warcraft FPS drop every 15 seconds.

#48 2008-07-31 05:41:45

Re: World of Warcraft FPS drop every 15 seconds.

#49 2008-07-31 07:33:41

Re: World of Warcraft FPS drop every 15 seconds.

#50 2008-07-31 07:40:22

Re: World of Warcraft FPS drop every 15 seconds.

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