TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 265 be/3 root 0.00 K 440.00 K 0.00 % 2.73 % [jbd2/sda2-8] 12778 be/4 root 0.00 K 56.00 K 0.00 % 1.79 % unity-syst~[Mir/Comp] 21082 be/4 root 0.00 K 0.00 K 0.00 % 0.45 % [kworker/u16:5] 19677 be/4 root 0.00 K 0.00 K 0.00 % 0.20 % [kworker/u16:3] 21111 be/4 root 0.00 K 0.00 K 0.00 % 0.18 % [kworker/u16:0] 1078 be/4 root 0.00 K 8.00 K 0.00 % 0.08 % accounts-daemon 1230 be/4 syslog 0.00 K 16.00 K 0.00 % 0.00 % rsyslogd -~ain Q:Reg] 19799 be/4 dan 0.00 K 88.00 K 0.00 % 0.00 % upstart --user 20013 be/4 dan 0.00 K 4.00 K 0.00 % 0.00 % unity8 --m~full-shell
** Changed in: unity-system-compositor (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity-system-compositor in Ubuntu. https://bugs.launchpad.net/bugs/1664150 Title: [performance] Unity8 rendering hiccups/stutters exactly every 5 seconds in unison with disk activity Status in Canonical System Image: Confirmed Status in Mir: Invalid Status in Unity System Compositor: Confirmed Status in qtmir package in Ubuntu: Confirmed Status in unity-system-compositor package in Ubuntu: Confirmed Status in unity8 package in Ubuntu: Confirmed Bug description: Using Mir 0.26.1, Unity8 runs better than ever. But when displaying a large continuously rendering window (e.g. eglplasma or egltriangle), the Unity8 shell hiccups and visually stutters exactly every 5 seconds. According to MIR_CLIENT_PERF_REPORT it's quite major, missing somewhere around 9 frames every 5 seconds. This matches what I see on screen - a large number of frames skipped once every five seconds... [2017-02-13 16:16:26.761602] perf: : 60.00 FPS, render time 0.41ms, buffer lag 66.31ms (4 buffers) [2017-02-13 16:16:27.762435] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:28.763269] perf: : 51.00 FPS, render time 0.39ms, buffer lag 78.10ms (4 buffers) [2017-02-13 16:16:29.764068] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:30.764939] perf: : 60.00 FPS, render time 0.38ms, buffer lag 66.33ms (4 buffers) [2017-02-13 16:16:31.765773] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:32.766603] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:33.767437] perf: : 51.00 FPS, render time 0.38ms, buffer lag 78.10ms (4 buffers) [2017-02-13 16:16:34.768274] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:35.769109] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:36.769943] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:37.770780] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:38.771629] perf: : 51.00 FPS, render time 0.40ms, buffer lag 78.09ms (4 buffers) [2017-02-13 16:16:39.772446] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:40.773279] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:41.774111] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:42.774944] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:43.775796] perf: : 51.00 FPS, render time 0.38ms, buffer lag 78.10ms (4 buffers) [2017-02-13 16:16:44.776615] perf: : 60.00 FPS, render time 0.36ms, buffer lag 66.35ms (4 buffers) [2017-02-13 16:16:45.777448] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.33ms (4 buffers) [2017-02-13 16:16:46.778282] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.33ms (4 buffers) [2017-02-13 16:16:47.779135] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:48.779969] perf: : 51.00 FPS, render time 0.39ms, buffer lag 78.09ms (4 buffers) [2017-02-13 16:16:49.780801] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) [2017-02-13 16:16:50.781639] perf: : 60.00 FPS, render time 0.39ms, buffer lag 66.32ms (4 buffers) To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1664150/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
