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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL] Up to 20% performance regression in GpuTest Triangle, due to 2x higher CPU power usage"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107410#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL] Up to 20% performance regression in GpuTest Triangle, due to 2x higher CPU power usage"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107410">bug 107410</a>
from <span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
</span></b>
<pre>Heaven wasn't impacted in my tests either. Only simpler tests were.
(In reply to Eero Tamminen from <a href="show_bug.cgi?id=107410#c0">comment #0</a>)
<span class="quote">> There were following 3D benchmark performance regressions on SKL GT4e:
> - 20% GpuTest Triangle (windowed & composited, half screen size)</span >
./GpuTest /test=triangle /width=1366 /height=768 /msaa=1 /no_scorebox
/benchmark /benchmark_duration_ms=35000
(Composited with Unity desktop compositor as it's windowed.)
<span class="quote">> - 10% GpuTest Triangle (FullHD fullscreen i.e. slower)</span >
./GpuTest /test=triangle /width=1920 /height=1080 /fullscreen /msaa=1
/no_scorebox /benchmark /benchmark_duration_ms=35000
Test does just a clear and draws single triangle covering half a window, so
this test is as trivial as glxgears.
GpuTest is the benchmark from here:
<a href="https://www.geeks3d.com/gputest/">https://www.geeks3d.com/gputest/</a>
(Score it reports is just the number of frames rendered.)
<span class="quote">> - 1-6% SynMark Batch[2-4]</span >
Batch0-7 are a series of tests where about 2M of triangles of are drawn. In
Batch0 they're with a single draw call, in Batch1 they're split to two calls,
in Batch2 to 4 calls etc. At or after Batch5 i.e. 2M of triangles being split
to 32 draw calls, tests start to become CPU bound.
<span class="quote">> - 1-4% GfxBench Tessellation (onscreen only), GpuTest Julia32 (windowed), SynMark GSCloth & ShMapPcf (fullscreen)</span >
GSCloth does 72 draw calls per frame, Tessalation test 50, ShMapPcf 7, and
Julia32 does 2 of them. Julia32 is fastest of these and GSCloth slowest
(GSCloth may be slightly CPU bound).</pre>
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