[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
Hi guys, I had same problem with CFS + BOINC + pulseaudio on my Pentium 4 HT 2.8GHz. The trouble was caused by using schedtool to run BOINC. After I removed it (sudo aptitude purge schedtool), there was no pulseaudio stuttering (despite pulseaudio is using 20% of my CPU... which is IMHO pretty high). This bug is 100% reproducible on Debian with 2.6.26 kernels. I have default pulseadio config (and changed only number of default-output-channels from 2 to 6), and while listening to music (running audacious audio player with pulse output), and running BOINC at the same time I have no stuttering. Then if I install schedtool (sudo aptitude install schedtool) and restart BOINC (sudo /etc/init.d/boinc-client restart) the music starts to lag, skip etc... then removing schedool (sudo aptitude purge schedtool) and restarting BOINC again makes the music run fine (e.g. no stuttering and skips). I'm not 100% sure this will help you guys with Ubuntu systems, but since Debian and Ubuntu are pretty close, I think it could be the same problem... Schedtool isn't installed by default on Debian(same for Ubuntu), but it happened that I used it to run BOINC, before 2.6.24 kernel with CFS was released... PS: this bug isn't related to CONFIG_FAIR_USER_SCHED, where all users have same priority and it slows systems with BOINC running, because BOINC is running under boinc user, which has 50% of CPU share. It's for those who got sound issues, even after using kernels with CONFIG_FAIR_USER_SCHED turned off... -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
** Changed in: boinc (Debian) Status: New = Fix Released -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
** Changed in: linux (Ubuntu) Sourcepackagename: linux-source-2.6.24 = linux -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
Dana, the linux task has been invalidated before. Please refer to bug 188226 to improve the default kernel behaviour. I just wanted to provide the workaround for boinc, which I'm using myself. Dhaval has asked me to use the uevents interface instead, so I'll do a new upload for boinc later, which works around it by providing a udev rules file: SUBSYSTEM==kernel, DEVPATH==/kernel/uids/*, ACTION==add, RUN+=/usr/lib/boinc-client/udev-usr_share and a script to check if it's the boinc user's uid and assign the cpu_share accordingly (/usr/lib/boinc-client/udev-usr_share). Like said before, this is only meant as a workaround for now and no option for downloaded programs like e.g. [EMAIL PROTECTED] Let's wait for a decision from the ubuntu-kernel team (other bug). Thanks. ** Changed in: linux (Ubuntu) Status: New = Invalid -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
Aah, okay. Perhaps this bug just needs to be renamed back to being specific to 'boinc' again, and not marked fixed yet since it's not yet a 'proper' fix. I can confirm, by installing the old .22 kernel, that the audio dropouts only happen with the new .24 kernel. It's especially noticeable with timidity (not as daemon) -- when PulseAudio drops out, the application itself stalls. In addition, with the old kernel, my folding tasks no longer slow down my compiz-fusion desktop. Should I add comments to the linked bug 188226 ? -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
Marking it as invalid, not really a bug with boinc. ** Changed in: boinc (Ubuntu) Status: Confirmed = Incomplete ** Changed in: boinc (Ubuntu) Status: Incomplete = Invalid -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
** Changed in: boinc (Ubuntu) Assignee: (unassigned) = Daniel Hahler (blueyed) Status: Invalid = In Progress -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
I've filed a new bug 188226 for linux: Kernel should use CONFIG_FAIR_CGROUP_SCHED. I'll upload a workaround for boinc to adjust the cpu_share to 2 in the init script until this gets resolved for the kernel. -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
This bug was fixed in the package boinc - 5.10.30-5ubuntu1 --- boinc (5.10.30-5ubuntu1) hardy; urgency=low * debian/patches/ubuntu_temp_cfs_fix.patch: Temporary workaround for the new CFS Linux scheduler, by adjusting the boinc user's cpu_share to the minimum (2) in the init script (LP: #177713) * Modify Maintainer value to match the DebianMaintainerField specification. -- Daniel Hahler [EMAIL PROTECTED] Sat, 02 Feb 2008 02:48:01 +0100 ** Changed in: boinc (Ubuntu) Status: In Progress = Fix Released -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
I'm adding an assignment to linux-source-2.6.24, because working around the bug in boinc does not fix the underlying cause. In addition to the [EMAIL PROTECTED] issues, I've also noticed dropouts / skipping in PulseAudio upon doing things such as closing my laptop lid; under the 2.6.22 kernel, I never (or at least rarely) had such issues. I am in the pulse-rt group, so it should be running with realtime priority. -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
** Changed in: boinc (Ubuntu) Assignee: Daniel Hahler (blueyed) = (unassigned) -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 177713] Re: CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes
One temporary solution to avoid ditching boinc or folding for those who ran two processes on a dual core system is to run one process. You'll lose some efficiency, yes, but the system doesn't become a hog. -- CFS in 2.6.24 kernel needs cpu_share adjustment for niced processes https://bugs.launchpad.net/bugs/177713 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
