[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 #31 from Owen Zhang <owen.zhang at intel.com> ---
(In reply to Tvrtko Ursulin from comment #30)
> (In reply to Owen Zhang from comment #27)
> > Hi，
> > 
> > i have made the following changes on kernel 4.19:
> > 
> > 1) apply the following patch:
> > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/
> > ?h=linux-4.20.y&id=0a2fff2428f1e175932dc3cf115b68c868e3a839
> 
> This patch makes a difference on it's own? How much?
> 
> If it does, I think you have to test by ensuring input data is cached before
> the timing run, and dump the output to /dev/null.
> 
> Otherwise you are accounting for the changes in kernel's block and
> filesystem subsystems as well.
> 
> P.S. I haven't had the time yet to try the repro using the latest
> instructions.

only apply this patch, there hasn't any difference. it also need to change the
io_schedule_timeout to schedule_timeout. 

both apply these two changes, the cpu iowait number will be down.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20190320/df418ecd/attachment.html>