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Message #01402
[Bug 1340120] Re: Application uses 100% CPU but is not running in foreground
This morning there are 2 processes that use 100% CPU and no unity8 crash (or any other application):
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6640 phablet 20 0 274332 55128 28400 S 95,7 2,9 3:15.64 address-book-ap
6794 phablet 20 0 317832 54952 37480 S 76,6 2,9 3:30.50 camera-app
The load is more than 2 and the device has been rebooted 1 hour ago with image 138
09:30:37 up 1:04, 2 users, load average: 2,38, 1,82, 1,06
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https://bugs.launchpad.net/bugs/1340120
Title:
Application uses 100% CPU but is not running in foreground
Status in Mir:
New
Status in Qt integration with the Mir display server:
New
Status in “unity-mir” package in Ubuntu:
New
Status in “unity8” package in Ubuntu:
New
Bug description:
From time to time, some application uses 100% CPU but is not running
in foreground (not even in the list of recent application on the
application scope)
For example, in the top output below gallery-app uses 100% CPU, but it
is not 'launched' (not in recent apps)
top - 12:09:39 up 2:41, 2 users, load average: 1,82, 1,48, 2,31
Tasks: 250 total, 1 running, 246 sleeping, 3 stopped, 0 zombie
%Cpu(s): 3,1 us, 5,5 sy, 0,6 ni, 90,2 id, 0,6 wa, 0,0 hi, 0,0 si, 0,0 st
KiB Mem: 1878580 total, 1775476 used, 103104 free, 33104 buffers
KiB Swap: 524284 total, 2144 used, 522140 free. 1023324 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3895 phablet 20 0 302372 96608 40712 S 117,0 5,1 22:21.13 gallery-app
15556 phablet 20 0 5820 1088 752 R 35,6 0,1 0:00.13 top
I attached the output of strace for the gallery-app.
It is not specific to the gallery-app, I noticed this behavior with system-settings too.
I didn't find any pattern to reproduce this problem reliably.
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: unity8 7.90+14.10.20140709.2-0ubuntu1
Uname: Linux 3.4.0-5-mako armv7l
ApportVersion: 2.14.4-0ubuntu1
Architecture: armhf
Date: Thu Jul 10 11:56:49 2014
InstallationDate: Installed on 2014-07-10 (0 days ago)
InstallationMedia: Ubuntu Utopic Unicorn (development branch) - armhf (20140710-020204)
SourcePackage: unity8
UpgradeStatus: No upgrade log present (probably fresh install)
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