[Bug 81682] [snb] Frequent framerate drops

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81682

--- Comment #7 from Chris Wilson <chris at chris-wilson.co.uk> ---
That's different to what I was expecting. I thought that the gpufreq would
drop, but the game would still be struggling to render. That it is still
rendering excludes the possibility of a stall (either pageflip or an outright
GPU hang), but you might as well double-check with that kernel you compiled
didn't detect something and attach the dmesg.

Now, the next challenge is to grap a perf profile from the good/bad periods.
(That's the type of integration that we want into the GPU monitoring tools, but
we don't have today.)

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