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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [UVD] qvdpautest is very slow on radeonsi (HD 7950)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71448#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [UVD] qvdpautest is very slow on radeonsi (HD 7950)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71448">bug 71448</a>
from <span class="vcard"><a class="email" href="mailto:ptpzz@yandex.ru" title="Vadim Girlin <ptpzz@yandex.ru>"> <span class="fn">Vadim Girlin</span></a>
</span></b>
<pre>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 <a href="show_bug.cgi?id=71448#c6">comment #6</a>)
<span class="quote">> *Anyway* when I did run the attached benchmark I forced dpm to "high" before
> starting.</span >
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.</pre>
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