Andrea Arcangeli wrote, on 24/02/11 07:55: > On Thu, Feb 24, 2011 at 06:37:58AM +1030, Arthur Marsh wrote: >> kswapd-high_wmark + compaction-kswapd-2 - kswapd0 CPU up to 11 percent >> and slightly less pronounced slowdowns of MIDI playback compared to >> previous patches. >> >> kswapd-high_wmark + compaction-no-kswapd-3 - kswapd0 CPU up to 2.3 >> percent and no noticable slowdown of MIDI playback. >> >> Mel Gorman's mm/compaction.c patch - kswapd0 CPU up to 20 percent and no >> noticable slowdown of MIDI playback. >> >> Thanks everyone for the help with this. > > Ok then I think it's safer to go with compaction-no-kswapd-3. One more combination I tried: Mel Gorman's mm/compaction.c patch with Andrea Archangeli's kswapd-high_wmark + compaction-no-kswapd-3 patches - kswapd0 CPU less than 2 percent and no noticable slowdown of MIDI playback. This may be better performing than compaction-no-kswapd-3 alone but is not conclusive. > > I also created a git tree in case anybody else wants to test in easier > way. > > git clone --reference linux-2.6.git git://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git > (or "git clone git://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git") > cd aa > git checkout -f 3d74399aaece29047beba13a81650538af8db67a > (compaction-kswapd+compaction_alloc_lowlat) > git checkout -f f048d0082bd3c6a1cc3f5e67aa5ef83d1561ec27 > (compaction-no-kswapd+rest+compaction_alloc_lowlat) > git checkout -f 859e705548f7377b1803b05b2904bae77495fd1e (only > compaction_alloc_lowlat) > > http://git.kernel.org/?p=linux/kernel/git/andrea/aa.git;a=shortlog;h=3d74399aaece29047beba13a81650538af8db67a > http://git.kernel.org/?p=linux/kernel/git/andrea/aa.git;a=shortlog;h=f048d0082bd3c6a1cc3f5e67aa5ef83d1561ec27 > http://git.kernel.org/?p=linux/kernel/git/andrea/aa.git;a=shortlog;h=859e705548f7377b1803b05b2904bae77495fd1e > > Arthur could you give one more spin to the > 3d74399aaece29047beba13a81650538af8db67a tree? (or do you prefer an > updated patch compaction-kswapd-3?) If you can send me an updated patch compaction-no-kswapd-3 (I presume that kswapd-high_wmark is still needed) it would be easier for me to apply. > > I'd like to get 3d74399aaece29047beba13a81650538af8db67a tested again > because I did one more modification included in the git version > compared to the patch version (nr_slab was not always initialized and > it could lead to slightly higher kswapd cpu load than intended). I > doubt it will help though (just in case). > > Mel what you think? If f048d0082bd3c6a1cc3f5e67aa5ef83d1561ec27 is > still the only one that shows no regression, I think it's safe to > apply it to 2.6.38 and revert the compaction in kswapd feature. Then > we can add compaction to kswapd later with no hurry. > > Thanks a lot for the help and quick feedback! > Andrea > Arthur. ------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
