Hello, Thanks for the quick reply! With my real use-cases: 1. 9x 720p60 mpeg2 videos - 4.0-rc6: ~12 frames per second are on time - 4.0-rc6 + reverts: a stable 45 frames per second are on time - 044307a9: 40-45 frames per second are on time - 0a24802a: 45-46 frames per second are on time 2. 1080i30 mpeg2 videos - 4.0-rc6: 5 videos - 044307a9: 10 videos - 0a24802a: 10 videos So you basically beat my baseline too, good job, thanks a lot! Any chance you can sneak this into 4.0 ? Olivier On Fri, 2015-04-10 at 07:23 +0100, Chris Wilson wrote: > On Thu, Apr 09, 2015 at 09:00:43PM -0400, Olivier Crête wrote: > > Hello, > > > > Using an Atom E3845 board, we had a pretty bad performance regression > > when upgrading to 4.0-rc6 from 3.19. With the help of git bisect, I > > traced it back to commit 78a42377. Reverting this commit and subsequent > > related commits (b9ffd80, 71745376, etc) fixes the performance > > regression for me. > > Can you please test > > http://cgit.freedesktop.org/~ickle/linux-2.6/log/?h=for-olivier-crete > > on your setup. > > First > http://cgit.freedesktop.org/~ickle/linux-2.6/commit/?h=for-olivier-crete&id=044307a99b418258ac0d775460d73b20b80277c1 > to get a baseline with nightly as that contains some fine tuning to the > batch allocations, which is pretty significant for libva on Atom (only > double clflushing one or two pages every batch rather than 128) and then > http://cgit.freedesktop.org/~ickle/linux-2.6/commit/?h=for-olivier-crete&id=0a24802a5b61403b887ce401ce3efd52f5fd1eac > to see if the command parser tuning helps. > > Hope this helps, > -Chris > -- Olivier Crête olivier.crete@xxxxxxxxxxxxx _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
