Environment: ----------------------------------- Platform:BDW Libdrm:(master)libdrm-2.4.58-4-g00847fa48b83a85b0cb882594a12ed1511f780db Mesa:(master)b86f814afd4a8cc1d5a17308fcdd05fbb937ae93 Xserver:(master)xorg-server-1.16.0-418-g61a292adf45405641de1c522a04c148e0a152acd Xf86_video_intel:(master)2.99.916-95-g49376ba3bddd15e62df55928198160d9970dc1c6 Cairo:(master)ab2a7b61d59258b71e1c3256edf2f42ea6cc1eb2 Libva:(master)ccd93de5a707e92a629cccd595757c8d436fa3cc Libva_intel_driver:(master)f11176415ec26eb5960ba6841d2d9c22f2cabc60 Kernel:(drm-intel-nightly)ead7d71357628dc1231535886ec09853e9164d6d Bug detailed description: --------------------------------------------- Synmark2_OglGeomPoint performance reduced ~25% on BDW. This problem exist both on gnome-session and Raw X. It's Mesa regression,bisect result first bad commit is: commit b7844d12487dbac702ecd734faeffa6fe1a61a83 Author: Kenneth Graunke <kenneth@whitecape.org> AuthorDate: Tue Sep 30 01:15:56 2014 -0700 Commit: Kenneth Graunke <kenneth@whitecape.org> CommitDate: Thu Oct 9 15:03:32 2014 +0200 i965: Use BDW_MOCS_PTE for renderbuffers. Reproduce steps: --------------------------------------------- 1. xinit& 2. ./synmark2 OglGeomPoint
The commit itself is fine, it improves performance in *many* tests significantly, to what their performance should have been. We'll still want to know why only this test [1] was affected by caching mode setting, so bug can be kept open. However, GL_POINTS is less important test and its performance is currently good enough, so setting bug importance to lower. [1] Were any other tests affected negatively (>10%)?
(In reply to Eero Tamminen from comment #1) > The commit itself is fine, it improves performance in *many* tests > significantly, to what their performance should have been. We'll still want > to know why only this test [1] was affected by caching mode setting, so bug > can be kept open. However, GL_POINTS is less important test and its > performance is currently good enough, so setting bug importance to lower. > [1] Were any other tests affected negatively (>10%)? According to our test results , only for this case its performance is down 25%. The others are positively affected.
This bug is also exist on Mesa10.4RC1
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