[Bug 110394] Skylake GPU HANG while gstreamer H264 vaapi encoding from MJPEG vaapi decode on drm-tip

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110394

--- Comment #24 from Andy Nicholas <andy.nicholas at shield.ai> ---
(In reply to Andy Nicholas from comment #23)
> Ok, I ran the kernel with the patch to disable RC6 on 8x compute sticks
> running the same kernel and same user-mode libraries. As per the previous
> tests, the minimum and maximum frequency was locked at 500 Mhz.
> 
> We observed zero crashes or warnings emitted into the dmesg log (or anywhere
> else). None of the compute sticks locked-up or otherwise misbehaved.
> 
> This was our expectation, and after running the transcode loop more than
> 28,000 times (3500x8) this continues to the the case.

Any previous test crashed around 1050 times at most, and often much sooner, so
I believe having all the compute sticks survive to 3500 iterations is
statistically significant.

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