<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - CPU iowait higher when run the GPU multi decoding threads" href="https://bugs.freedesktop.org/show_bug.cgi?id=109830#c19">Comment # 19</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - CPU iowait higher when run the GPU multi decoding threads" href="https://bugs.freedesktop.org/show_bug.cgi?id=109830">bug 109830</a> from <a class="email" href="mailto:owen.zhang@intel.com" title="Owen Zhang <owen.zhang@intel.com>"> Owen Zhang</a> <pre>(In reply to Tvrtko Ursulin from <a href="show_bug.cgi?id=109830#c17">comment #17</a>) > What is the good iowait in percentage? > > I don't have vaapi installed - it looks I incorrectly assumed the reproducer > is self contained? I still need to build the stack from #1? > > Can you try with drm-tip? With schedule_timeout I get iowait of 0% for > simulated media pipelines. :) from our test on kenrel 4.4, the iowait is around 60% in average for whole media process. for kernel 4.19, the iowait is 90%+. our reproducer hasn't included vaapi binary, so Is it possible give your ip address, i can remote to check your env? and i will upload this later. yes, i try on drm-tip with schedule_timeout, the iowait will reduce to around 60%. but i think the Chris's patch also can fix this. drm/i915: Replace global breadcrumbs with per-context interrupt tracking BTW, you may need the following cmd to see the full changes when run the media pipelines. iostat -x 1 120</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>