Created attachment 115257 [details]
Failed platform: BSW
GFX SW stack:
Regression: Yes, it's kernel regression
Bisect from drm-intel-next-queued branch, the first bad commit shows as below:
Author: Deepak S <email@example.com>
AuthorDate: Sat Mar 28 15:23:35 2015 +0530
Commit: Daniel Vetter <firstname.lastname@example.org>
CommitDate: Thu Apr 16 16:05:24 2015 +0200
drm/i915: Re-adjusting rc6 promotional timer for chv
GFXBench3_gl_driver/GFXBench3_gl_driver_offscreen performance reduced by 11%
1. cd /gfxbench3_desktop/build/linux/gfxbench_Release/mainapp
2. export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/games/OpenGL/gfxbench3_desktop/install/linux/lib
3. ./mainapp vblank_mode=0 -t gl_alu -fullscreen 1 -w 1920 -h 1080
Dmesg file has been attached.
However since RPS is suboptimal for BSW, see bug 90112, we should probably wait until we have that resolved before making perf judgements.
Braswell RPS has been tweaked. Let's hope for the best...