This is possibly not a bug at all, unless someone can prove arale can or has performed better than this in the past.
See comment #4 and #6, but also keep in mind arale has around 8 cores and still underperforms compared to other phones. So it stands to reason that even 100% of one core possibly isn't much to worry about if this is one of those platforms where the GPU load affects the CPU load. I completely agree that anything above 1% I would recommend investigating, /if this was not a graphics problem/. However since it is a graphics problem it is reasonably likely that the high relative CPU load is due to graphics drivers and poor CPU scaling that is specific to arale (a known problem). Since there is so much reasonable doubt as to whether this problem is in userspace at all, I recommend keeping it Incomplete unless we can get profile data showing high CPU in places where it shouldn't be. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1599649 Title: High CPU usage on arale when running simple clients with animations Status in Mir: Confirmed Status in QtMir: Confirmed Status in mir package in Ubuntu: Confirmed Status in qtmir package in Ubuntu: Confirmed Status in unity8 package in Ubuntu: Confirmed Bug description: It seems that independently from which Mir server I use (mir_demo_server, qtmir-demo-shell, unity8) the CPU usage on Arale when running any simple client seems to be quite high. My investigation started with a designer contacting me about https://bugs.launchpad.net/ubuntu/+source/ubuntu-ui-toolkit/+bug/1431957 and https://bugs.launchpad.net/ubuntu/+source/ubuntu-system-settings/+bug/1513450 Since the activity indicator visual has to be updated anyway, we were looking at the options we had to also make it less CPU consuming at the same time. It turned out it's not a matter of how you render it, anything that causes redraw at 60fps will cause high cpu usage, here are the results I got: Tools: phablet-shell to run the commands top to see cpu usage Device: Arale, rc-proposed r370 Setup: clean flash + apt-get install qtmir-tests mir-demos (qtmir-tests will remove qtmir-android, you'll have to reinstall it until https://bugs.launchpad.net/ubuntu/+source/qtmir/+bug/1599614 is fixed) echo 806000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq echo 806000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq and the same for cpu1 and cpu2 (after bringing them online by scrolling scopes) Results: === Minimal Mir server + egltriangle demo === sudo su stop lightdm echo 2047 > /sys/class/backlight/lm3630_bled/brightness sudo mir_demo_server_minimal --arw-file (separate shell, phablet user) mir_demo_client_egltriangle -m /tmp/mir_socket 1 CORE ONLINE mir_demo_server: 12.5% mir_demo_client: 11% === Mir demo server + egltriangle demo === sudo su stop lightdm echo 2047 > /sys/class/backlight/lm3630_bled/brightness LD_PRELOAD=/lib/arm-linux-gnueabihf/libpthread.so.0 mir_demo_server --test-client /usr/bin/mir_demo_client_egltriangle 1 CORE ONLINE mir demo server: 20% mir_demo_client: 9% === Qt Mir demo shell + egltriangle demo === sudo su stop lightdm echo 2047 > /sys/class/backlight/lm3630_bled/brightness cd /usr/share/qtmir/qtmir-demo-shell MIR_SERVER_FILE=/tmp/mir_socket QT_QPA_PLATFORM=mirserver qmlscene ./qml-demo-shell.qml (on a separate shell, phablet user) MIR_SOCKET=/tmp/mir_socket QT_QPA_PLATFORM=ubuntumirclient sudo mir_demo_client_egltriangle -- --desktop_file_hint=dialer-app 1 to 2 CORES ONLINE (varying) qmlscene (Mir server): 27.5% CPU mir_demo_client: 10% CPU === Unity8 + test qml app === qmlscene test.qml --desktop_file_hint=dialer-app 2 CORES ONLINE Unity8: 30% qmlscene: 15% USC: 10% ==== QML TEST FILE ==== import QtQuick 2.4 import Ubuntu.Components 1.3 Item { anchors.fill: parent /*AnimatedSprite { id: sprite width: 69 height: 69 source: "spinner-spritesheet.png" frameCount: 74 frameSync: true frameWidth: 81 frameHeight: 81 loops: 100 }*/ /*ActivityIndicator { id: indicator running: true }*/ Rectangle { id: rect width: 69 height: 69 color: "orange" /*RotationAnimation on rotation { loops: Animation.Infinite from: 0 to: 360 }*/ /*NumberAnimation on x { loops: Animation.Infinite from: 0 to: 360 }*/ XAnimator { target: rect; from: 0; to: 360; duration: 15000 running: true } } Timer { interval: 10000 running: true onTriggered: Qt.quit() } } To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1599649/+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
