** Description changed: - I did the following benchmarks between `metacity --no-composite`, - `metacity --composite`, and `compiz`, in Ubuntu 16.04. + [Impact] + Metacity's performance is about 2 times slower than it was in 14.04 version. It is a regression from previous LTS and impacts users with slow hardware. + + [Test Case] + Run some performance checker like x11perf or glmark2, see the reporter's comments below for detailed info. + + [Regression Potential] + This fix is tested by several users and seems to not have any regressions. + + ----------------------------------------------------------------------------- + I did the following benchmarks between `metacity --no-composite`, `metacity --composite`, and `compiz`, in Ubuntu 16.04. First, I disabled vsync: - $ cat ~/.drirc + $ cat ~/.drirc <device screen="0" driver="dri2"> - <application name="Default"> - <option name="vblank_mode" value="0"/> - </application> + <application name="Default"> + <option name="vblank_mode" value="0"/> + </application> </device> Then I ran glxgears as follows: $ metacity --no-composite --replace & sleep 5 && glxgears & sleep 20 && killall glxgears 29564 frames in 5.0 seconds = 5912.721 FPS 29729 frames in 5.0 seconds = 5945.777 FPS $ metacity --composite --replace & sleep 5 && glxgears & sleep 20 && killall glxgears 10366 frames in 5.0 seconds = 2073.057 FPS 10194 frames in 5.0 seconds = 2038.702 FPS $ compiz --replace & sleep 5 && glxgears & sleep 20 && killall glxgears 37633 frames in 5.0 seconds = 7522.813 FPS 37990 frames in 5.0 seconds = 7597.965 FPS As a second set of benchmarks, I ran glxgears -fullscreen as follows: $ metacity --no-composite --replace & sleep 5 && glxgears -fullscreen & sleep 20 && killall glxgears 1652 frames in 5.0 seconds = 330.296 FPS 1667 frames in 5.0 seconds = 333.281 FPS $ metacity --composite --replace & sleep 5 && glxgears -fullscreen & sleep 20 && killall glxgears 886 frames in 5.0 seconds = 177.007 FPS 891 frames in 5.0 seconds = 178.099 FPS $ compiz --replace & sleep 5 && glxgears -fullscreen & sleep 20 && killall glxgears 1830 frames in 5.0 seconds = 365.868 FPS 1847 frames in 5.0 seconds = 369.242 FPS - Normalized results (with compiz=100): ================================ Windowed: metacity --no-composite: 78 FPS metacity --composite: 27 FPS compiz: 100 FPS Full screen: metacity --no-composite: 90 FPS metacity --composite: 48 FPS compiz: 100 FPS So `metacity --composite` in this test was about 2 times slower than `metacity --no-composite` and about 3 times slower than `compiz`. This test was done an "Intel(R) Core(TM) i5-4440 CPU @ 3.10GHz" CPU, with the following embedded graphics card: $ lspci -nn -k | grep -A 2 VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06) - Subsystem: Gigabyte Technology Co., Ltd Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [1458:d000] - Kernel driver in use: i915 + Subsystem: Gigabyte Technology Co., Ltd Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [1458:d000] + Kernel driver in use: i915 I'll upload more tests if I find anything newsworthy.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to metacity in Ubuntu. https://bugs.launchpad.net/bugs/1566157 Title: Metacity's compositing is too slow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1566157/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
