[IVB/BDW Bisected] Firefox-fishbowl.trace and Firefox-fishtank.trace performance reduced ~96%
Submitted by wen..@..el.com
Assigned to Chris Wilson @ickle
Description
Created attachment 110981 dmesg file
Environment:
Test Platform:IVB/BDW
GFX SW Stack Libdrm: (master)libdrm-2.4.58-19-gf99522e678dbbaffeca9462a8edcbe900574dc12 Mesa: (master)83e8bb5b1a50c0105b642d559999f07fa64a982f Xserver: (master)xorg-server-1.16.99.901-98-g0f5fdaf600bfeada966aea942cb3e347d4efee30 Xf86_video_intel: (master)2.99.916-177-g99537089346ed7a1bc6b02349fad93845e865bb9 Cairo: (master)4a225fca Libva: (master)8986ec692b19d8dd6bd2aa118b5dffbd05a8f909 Libva_intel_driver: (master)b5d6d9d425a6d539b27d22992bda05f79d1a0622 Kernel: (drm-intel-nightly)8b7ac3dc495c2d02322bc751322331d2691089e5
Regression:
YES
Bug detailed description:
Firefox-fishbowl.trace and Firefox-fishtank.trace performance reduced ~96%. It's Cairo regression, from bisect result, first bad commit is:
Author: Bill Spitzak spitzak@gmail.com Date: Thu Oct 9 19:46:13 2014 -0700
xlib: Use image fallback for GOOD/BEST filters
Fallback is not used if the symbols defined in the previous patch to
indicate if XRender does GOOD/BEST are true.
This patch also includes some changes to take advantage of the fact that
if there is an integer translation analyze_filter will already have set
the filter to NEAREST.
Reviewed-by: Bryce Harrington <b.harrington@samsung.comReproduce steps:
1, xinit
2, vblank_mode=0 CAIRO_TEST_TARGET=xlib ./cairo-perf-trace -i 12 /home/cairo-traces/benchmark/firefox-fishbowl.trace
dmesg and xorg.log files have been uploaded.
Attachment 110981, "dmesg file":
dmesg.log