[Bug 109830] CPU iowait higher when run the GPU multi decoding threads

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109830

--- Comment #38 from Owen Zhang <owen.zhang at intel.com> ---
(In reply to Tvrtko Ursulin from comment #37)
> Ignoring these patches for now, but with pre-caching and output to /dev/null
> only. The iowait is still the same? 

from our test, yes.  

and from QA test:
only device mapper patch, the iowait can't down.
only io_schedule_timeout to schedule_timeout, the iowait can't down.

both device mapper patch and schedule timeout changes, the iowait can down.
thanks very much.

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