[Bug 82050] R9270X pyrit benchmark perf regressions with latest kernel/llvm

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Aug 12 04:47:47 PDT 2014


--- Comment #10 from Andy Furniss <adf.lists at gmail.com> ---
(In reply to comment #9)
> Created attachment 104475 [details] [review]
> Flush HDP cache via the ring on SI
> Does this patch help for the kernel regression?
> Though this seems to make some piglit test results unstable...

There is no difference with this.

FWIW I found another regression with this kernel that is caused by the same

Maybe regression is the wrong word, as there was already an issue, just it's
worse now.

I will file a separate bug in time (was planning to do new xorg and retest
first) but in summary -

Unigine Valley always did have some 1/2 to 1 sec pauses ever since I could run
it, first on HD4890 and now radeonsi R9 270X.

Since this kernel commit they are 2 to 4 times longer - also unchanged by

Strangely, if I use ffmpegs x11 grab to make a recording @ 30fps they become
short again.

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