<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT Bisected] OglBatch1 performance regression ~20%" href="https://bugs.freedesktop.org/show_bug.cgi?id=87821#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT Bisected] OglBatch1 performance regression ~20%" href="https://bugs.freedesktop.org/show_bug.cgi?id=87821">bug 87821</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>On byt N2820, 1080p: dri2: FPS: 99.9493 (MIN: 89.2223, MAX: 123.483, CV: 7.00455%, S: 10) dri3: FPS: 58.1767 (MIN: 42.9242, MAX: 66.0809, CV: 8.41218%, S: 10) I am not sure if dri3 is being locked to screen refresh or not (max of 66fps suggests otherwise, but it is suspiciously close to refresh). Tweaking DRI2 to use async flipping [<a href="http://cgit.freedesktop.org/~ickle/xserver/commit/?h=async-20141230&id=13372bcf995599b4fe1f427923635d02d2f4c71f">http://cgit.freedesktop.org/~ickle/xserver/commit/?h=async-20141230&id=13372bcf995599b4fe1f427923635d02d2f4c71f</a>]: FPS: 138.5 (MIN: 67.0551, MAX: 185.931, CV: 19.661%, S: 10) which does support that it is the swap ellision that may be the difference, but fwiw I cannot reproduce the reported DRI3 improvements.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>