Comment 1 for bug 571282

on my linux desktop, it looks like this running from source:
Top causes for wakeups:
  31.7% (291.5) <interrupt> : timer
  13.9% (127.5) <interrupt> : HDA Intel, i915@pci:0000:00:02.0
  13.7% (126.3) wish : do_nanosleep (hrtimer_wakeup)
   5.8% ( 53.0) firefox : futex_wait (hrtimer_wakeup)
   5.4% ( 49.2) <interrupt> : resched

so not the highest, but anyways, not so good. need to figure out where the nanosleep is done.