kernel-packages team mailing list archive

[James Hunt <1234743@xxxxxxxxxxxxxxxxxx>]

Thanks Colin. All the platform-device-changed events upstart is emitting
are from omapfb.ko:

KERNEL=omapfb
DEVPATH=/devices/platform/omapfb
SUBSYSTEM=platform
ACTION=change
DRIVER=omapfb
MODALIAS=platform:omapfb
SEQNUM=13545
USEC_INITIALIZED=1146951
VSYNC=12601146402237

So certainly looks like a device-specific kernel issue. Removing
upstart...

** Summary changed:

- init on samsung galaxy nexus is busy and consuming memory when playing an mp4
+ omapfb module floods system with udev events on samsung galaxy nexus when playing mp4

** No longer affects: upstart (Ubuntu)

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https://bugs.launchpad.net/bugs/1234743

Title:
  omapfb module floods system with udev events on samsung galaxy nexus
  when playing mp4

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Playing an mp4 on a Samsung Galaxy Nexus using today's image (3 Oct
  2013) for 30 minutes I observed that init is busy and also consuming
  heap quite rapidly.

  Attached is the output from running health-check (found in PPA:colin-
  king/white) on init pid 1114.

  Key points:

  1. messages being read/written at ~600 messages a second, hence the high context switch rate and ~4.9% CPU load. 
  2. heap consumption: ~30K a second using brk() and 2K a second via mmap

  To reproduce:

  Install health-check:

  sudo add-apt-repository ppa:colin-king/white
  sudo apt-get update && sudo apt-get install health-check

  Download a large mp4 to the phone. Keep screen from blanking using:

  sudo powerd-cli display on bright &

  then play the mp4:

  dbus-launch mediaplayer-app test.mp4
  --desktop_file_hint=/usr/share/applications/mediaplayer-app.desktop
  --stage_hint=main_stage

  And then observe that init is busy for 300 seconds:

  ps -e | grep init
      1 ?        00:02:56 init
    348 ?        00:00:00 init
   1114 ?        00:03:22 init

  sudo health-check -p 1114 -d 300

  Attached are my results for a 30 minute run.

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