26 Jan, 2008

1 commit

• 8f4d37ec0   sched: high-res preemption tick ... Browse Code »

  Use HR-timers (when available) to deliver an accurate preemption tick.

  The regular scheduler tick that runs at 1/HZ can be too coarse when nice
  level are used. The fairness system will still keep the cpu utilisation 'fair'
  by then delaying the task that got an excessive amount of CPU time but try to
  minimize this by delivering preemption points spot-on.

  The average frequency of this extra interrupt is sched_latency / nr_latency.
  Which need not be higher than 1/HZ, its just that the distribution within the
  sched_latency period is important.

  Signed-off-by: Peter Zijlstra
  Signed-off-by: Ingo Molnar

  Peter Zijlstra

  2008-01-26 04:08:29 +0800  

11 Oct, 2007

1 commit

• 96a388de5   i386/x86_64: move headers to include/asm-x86 ... Browse Code »

  Move the headers to include/asm-x86 and fixup the
  header install make rules

  Signed-off-by: Thomas Gleixner
  Signed-off-by: Ingo Molnar

  Thomas Gleixner

  2007-10-11 17:20:03 +0800