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[Alexandros Frantzis <alexandros.frantzis@xxxxxxxxxxxxx>]

The spinning futex wait we get in the strace:

2391  futex(0x1072a70, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN
(Resource temporarily unavailable)

Comes from:

25   Thread 0xb528f3e0 (LWP 2391) "Binder_1" __libc_do_syscall ()
    at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44

#0  __libc_do_syscall () at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
#1  0xb6a951e4 in __lll_lock_wait (futex=0xfffffff5, futex@entry=0x1072a70, private=<optimized out>)
    at ../ports/sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c:46
#2  0xb6a91840 in __GI___pthread_mutex_lock (mutex=0x1072a70) at pthread_mutex_lock.c:79
#3  0x000de3a8 in std::mutex::lock() ()
#4  0x0011f064 in ?? ()
#5  0x000e390c in core::Signal<void>::operator()() ()
#6  0x000e390c in core::Signal<void>::operator()() ()
#7  0xb676115e in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

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https://bugs.launchpad.net/bugs/1380848

Title:
  [TOPBLOCKER] Apps and services use large amount of CPU after unity8
  resets

Status in Media Hub:
  Triaged
Status in “dbus-cpp” package in Ubuntu:
  New

Bug description:
  I noticed that media-hub-service can get into a state where it uses a
  large amount of CPU.

  Steps to reproduce
  1) Start music-app
  2) Play music
  3) Pause music
  4) Close the music-app
  5) $ pkill unity8 (to emulate unity crashing a resetting)

  Notice that media-hub-service is now using a large amount of CPU, note
  this [0] is the media-hub.log at the time.

  The device has to be reset to get the CPU usage back to normal.

  0 - http://pastebin.ubuntu.com/8553411/

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