Hello,

i am seeing the same behaviour, hrtimer_start_range_ns causes more than
2000 wakups:

  87.4% (2002.0)     <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
   7.6% (174.2)       <interrupt> : ahci
   1.3% ( 30.2)       <interrupt> : iwlagn
   1.2% ( 27.2)       <interrupt> : acpi
   0.7% ( 15.8)      <kernel IPI> : Rescheduling interrupts
   0.6% ( 13.8)           firefox : hrtimer_start_range_ns (hrtimer_wakeup)
   0.2% (  5.4)   thunderbird-bin : hrtimer_start_range_ns (hrtimer_wakeup)
   0.2% (  3.8)            plasma : hrtimer_start_range_ns (hrtimer_wakeup)
   0.1% (  3.0)       <interrupt> : i915

This happens with kernels 2.6.29.4 - 2.6.30-rc7-git1. If you need more
Info, tell me, i am happy to provide if i can.

-- 
wakeups  <kernel core> : hrtimer_start_range_ns (tick_sched_timer) 
https://bugs.launchpad.net/bugs/373245
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