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<body><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> changed
<a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [BYT] Offscreen tests performance drops to <1/3 due to power management"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102336">bug 102336</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>RESOLVED
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<td>VERIFIED
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<b><a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [BYT] Offscreen tests performance drops to <1/3 due to power management"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102336#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_VERIFIED bz_closed"
title="VERIFIED FIXED - [BYT] Offscreen tests performance drops to <1/3 due to power management"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102336">bug 102336</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>(In reply to Chris Wilson from <a href="show_bug.cgi?id=102336#c7">comment #7</a>)
<span class="quote">> Now fixed in x86/tip.</span >
Verified, all the regressions are no fixed, thanks!
<span class="quote">> If you want to report some details of the hang, otherwise there's not much I
> can do.</span >
Was the issue BYT specific, like the related perf drop was?
<span class="quote">> The reason why it suddenly became worse is all due to switching to
> modesetting, which only used rcs and so we end up interesting behaviour with
> X getting stuck behind extra frames, and not reporting the buffer as idle as
> early (so the client would be waiting on the CPU fence being signaled and
> not waiting on the GPU, so being invisible to the waitboost mechanism).
> Interesting effect.</span >
Modesetting drop isn't BYT specific.
When Martin tested modesetting ~1 year ago against Intel DDX, modesetting was
same speed or slightly better in 3D cases (and lost in 2D ones).
However, now switching from Intel DDX to modesetting drops onscreen 3D
test-cases perf on all platforms for Unigine demos (on anything after BYT),
GfxBench test-cases and high FPS cases.
Any idea why?</pre>
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