<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body><a class="email" href="mailto:apinheiro@igalia.com" title="Alejandro Piñeiro (freenode IRC: apinheiro) <apinheiro@igalia.com>"> Alejandro Piñeiro (freenode IRC: apinheiro)</a> changed <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB/HSW/BYT-M/BDW] GpuTest_v0.5_triangle performance slower by 10%~50% in fullscreen than in windowed & composited mode" href="https://bugs.freedesktop.org/show_bug.cgi?id=80705">bug 80705</a> <table border="1" cellspacing="0" cellpadding="8"> <tr> <th>What</th> <th>Removed</th> <th>Added</th> </tr> <tr> <td style="text-align:right;">CC</td> <td> </td> <td>apinheiro@igalia.com </td> </tr></table> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB/HSW/BYT-M/BDW] GpuTest_v0.5_triangle performance slower by 10%~50% in fullscreen than in windowed & composited mode" href="https://bugs.freedesktop.org/show_bug.cgi?id=80705#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [IVB/HSW/BYT-M/BDW] GpuTest_v0.5_triangle performance slower by 10%~50% in fullscreen than in windowed & composited mode" href="https://bugs.freedesktop.org/show_bug.cgi?id=80705">bug 80705</a> from <a class="email" href="mailto:apinheiro@igalia.com" title="Alejandro Piñeiro (freenode IRC: apinheiro) <apinheiro@igalia.com>"> Alejandro Piñeiro (freenode IRC: apinheiro)</a> <pre>(In reply to Eero Tamminen from <a href="show_bug.cgi?id=80705#c5">comment #5</a>) > (In reply to Alejandro Piñeiro (freenode IRC: apinheiro) from <a href="show_bug.cgi?id=80705#c4">comment #4</a>) > > (In reply to zhoujian from <a href="show_bug.cgi?id=80705#c0">comment #0</a>) > > > FYI: In an unrelated test it was noticed that with DRI3, X still does > > > occasionally Vsync wait although test had zeroed swap interval. > ... > > If Vsync were happening with fullscreen, the FPS (that is the measure of > > performance in this test) would be equal to the refresh rate. So for > > example, in my case 60FPS. > > Only if it happens for every frame. Year ago, when Vsync was disabled with > *DRI3*, I was seeing some tests being synched to 120 or 180 FPS i.e. every > second or third frame. Ok. In any case setting LIBGL_DEBUG to verbose I got this: libGL: Using DRI2 for screen 0 So, as I mentioned this is also happening on DRI2. > > But that is not the case, but ~360 FPS. > > > > curious thing is that it doesn't matter the resolution, on fullscreen the > > FPS are always 360FPS. > > This is multiple of 60FPS, and it not changing sounds like some of the > frames were still synched. I would suggest checking frame timings for > individual frames to see whether this is the case. Doing more tests: my previous numbers were on a gnome-session with metacity. On a gnome-session with gnome-shell, or without compositor (ctrl+alt+fX, xinit) I get similar outcome for windowed (slightly better) but tied to a little more of 790fps for the fullscreen case in any resolution. > > > But on windowed I detected ~380 for 1920x1280, ~860 > > for 1280x720 and so on. > > I haven't seen DRI3 sync-when-vsync-disabled issue in Windowed tests. Ok.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>