Andrea Arcangeli wrote, on 24/02/11 10:29: > On Thu, Feb 24, 2011 at 08:25:43AM +1030, Arthur Marsh wrote: >> 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. > > Applying Mel's patch on top should decrease latency more. > >> 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. > > It's a compaction-kswapd-3. It's likely going to work the same as the > previous compaction-kswapd-2 (not as good as > compaction-no-kswapd). It's better to apply both the kswapd-high_wmark > and Mel's patch too (not only this one) during testing.
OK, with kswapd-high_wmark + compaction-kswapd-3 + Mel's patch (with the compaction initialisation fix), MIDI playback is fine. kswapd0 CPU can very occasionally hit equal highest (17 percent was the highest I noticed, but is generally below the top 4-5 processes and less than 10 percent when working, dropping to around 0.3 percent when swap activity has subsided). This was with loading KDE 3.5.10, konversation, aptitude -u, icedove and iceweasel with several dozen tabs in addition to aplaymidi. Regards, 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@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
