On Friday 27 April 2007 06:11, Martin Steigerwald wrote: > Am Dienstag 24 April 2007 schrieb Martin Steigerwald: > > Hello once again, > > > > I now tested cfs-v5 on my ThinkPad T23 with > > > > [EMAIL PROTECTED]:~> cat /proc/version > > Linux version 2.6.20.7-tp23-sws2-2.2.9.9-sd-0.46 ([EMAIL PROTECTED]) > > (gcc-Version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 PREEMPT > > Sun Apr 22 21:40:30 CEST 2007 > > > > I had the KDE desktop + Amarok running and nothing else. But music > > playbacks stopped for about a second every now and then. Quite > > annoyingly often. I think thats quite similar to the mouse pointer > > freezes I had on the T42. I did not look whether the mousepointer > > really froze, but I can check that again. > > > > I then did the same naive user test than I did with sd-0.44 and > > sd-0.46, starting building debian kernel-source package, opening lots > > of applications - mostly KDE ones, anything I could find on my toolbar > > from Konsole, KWrite to Konqueror, Iceweasel ... - and then moved > > around Amaroks window. Well I managed to completely stop music playback > > for more than 5 seconds. Music playback completely paused. This again > > was with nice -10 configured in CFSv5 source. > > > > I repeated the test with X.org reniced to 0. It got better but I still > > managed to pause music playback for a second or so. But maybe that was > > one of that music stops that also happen when the machine is idling > > around. They also happen with X.org reniced to 0. > > Hi! > > Okay, this got way better with cfs-v6. I tested my way through this with > different cfs versions and settings as guided by Ingo. We did this via > private mail as Ingo didn't want to (ab)use the ck-patch mailinglist for > this. But now after having ranted publically about cfs, I at least also > write publically that things have gotten better ;-). > > After having a drastic sound playback regression cfs-v6-rc7 which I could > not reproduce today, I have way better results with cfs-v6 than with > cfs-v5. This is with 2.6.20.7, sws2 2.2.9.9 and cfs-v6. > > But still there were some pauses in music playback with default setting. > > For smooth music playback with Amarok on my T23 I had to go as low as: > > --------------------------------------------------------------------- > deepdance:/proc/sys/kernel> grep ".*" sched*gran* > sched_granularity_ns:2000000 > sched_wakeup_granularity_ns:0 > deepdance:/proc/sys/kernel> echo "1500000" >sched_granularity_ns > deepdance:/proc/sys/kernel> grep ".*" sched*gran* > sched_granularity_ns:1500000 > sched_wakeup_granularity_ns:0 > deepdance:/proc/sys/kernel> echo "1000000" >sched_granularity_ns > deepdance:/proc/sys/kernel> grep ".*" sched*gran* > sched_granularity_ns:1000000 > sched_wakeup_granularity_ns:0 > deepdance:/proc/sys/kernel> echo "500000" >sched_granularity_ns > deepdance:/proc/sys/kernel> grep ".*" sched*gran* > sched_granularity_ns:500000 > sched_wakeup_granularity_ns:0 > deepdance:/proc/sys/kernel> echo "250000" >sched_granularity_ns > deepdance:/proc/sys/kernel> grep ".*" sched*gran* > sched_granularity_ns:250000 > sched_wakeup_granularity_ns:0 > --------------------------------------------------------------------- > > Then music playback was working nicely when I did not interfere ;-) > > Even then I was able to stop audio playback for longer than a second by my > naive user test... compiling a kernel, opening lots of apps and moving > the Amarok window around like mad. > > With > > --------------------------------------------------------------------- > deepdance:/proc/sys/kernel> echo "0" >sched_granularity_ns > deepdance:/proc/sys/kernel> grep ".*" sched*gran* > sched_granularity_ns:0 > sched_wakeup_granularity_ns:0 > --------------------------------------------------------------------- > > it was working nice. Subjectively on par with sd-0.46. > > buddabrod can you test these suggestions? I am using cfs-v6 with X11 > renicing.
Clearly there are some serious regressions for audio playback with CFS. This is incredible effort to go to with CFS. > Still sd-0.46 is giving me as default what I have to configure with > cfs-v6 ;-). And as a user I want this behavior as default, instead of > having to fiddle with the schedular settings. Smooth music playback is a > must as Ingo agreed already ;). Nice to hear that SD does everything CFS strives to achieve. I'm glad I continued development on it so that it remains the reference for CFS to compare to. > No need to continue that thread here from my side... I just wanted to > mention that it got better. Its still Cons ck-patch list. A general > scheduler hacking and testing list would come in handy I guess. lkml is perfectly suited for that discussion provided everyone follows the convention of cc'ing everyone on their replies, and I have taken the liberty of cc'ing it on this thread too. -- -ck - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
