https://bugs.freedesktop.org/show_bug.cgi?id=71448
--- Comment #10 from Vadim Girlin ptpzz@yandex.ru --- This is probably related to dpm and gpu clocks - if I run "vblank_mode=0 glxgears" in parallel with the benchmark the results are significantly better for me:
w/o gears:
MPEG DECODING (1920x1080): 13 frames/s MPEG DECODING (1280x720): 13 frames/s H264 DECODING (1920x1080): 12 frames/s H264 DECODING (1280x720): 13 frames/s
with gears:
MPEG DECODING (1920x1080): 77 frames/s MPEG DECODING (1280x720): 118 frames/s H264 DECODING (1920x1080): 51 frames/s H264 DECODING (1280x720): 92 frames/s
(In reply to comment #6)
*Anyway* when I did run the attached benchmark I forced dpm to "high" before starting.
Setting power_dpm_force_performance_level to "high" doesn't really work for me in this case - AFAICS the driver resets it back to "auto" when the benchmark starts, probably when switching to uvd state.