touch-packages team mailing list archive

[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

Confirmed. Happens with mir_demo_client_fingerpaint too. Kill the server
and the client spins at 100%.

** Summary changed:

- Application uses 100% CPU but is not running in foreground
+ Some Mir clients spin at 100% CPU when the server dies

** Changed in: mir
       Status: New => Triaged

** Changed in: mir
   Importance: Undecided => Medium

** Also affects: mir (Ubuntu)
   Importance: Undecided
       Status: New

** Summary changed:

- Some Mir clients spin at 100% CPU when the server dies
+ Some Mir clients spin at 100% CPU if the server dies

** Changed in: qtmir
       Status: New => Invalid

** Changed in: unity8 (Ubuntu)
       Status: New => Invalid

** Changed in: unity-mir (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1340120

Title:
  Some Mir clients spin at 100% CPU if the server dies

Status in Mir:
  Triaged
Status in Qt integration with the Mir display server:
  Invalid
Status in “mir” package in Ubuntu:
  New
Status in “unity-mir” package in Ubuntu:
  Invalid
Status in “unity8” package in Ubuntu:
  Invalid

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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