Messages in this thread | | | Date | Thu, 7 May 2009 13:55:08 -0400 (EDT) | From | Christoph Lameter <> | Subject | Re: [PATCH] x86: Reduce the default HZ value |
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On Thu, 7 May 2009, Peter Zijlstra wrote:
> > If there is a single process running on a processor and no other process > > is contending then there is no need to do involuntary preemption. > > Sure, and CONFIG_SCHED_HRTICK does that, the trick is getting it to not > hurt others.
If other processors are scheduled on the processor then an IPI could notify the scheduler over there to start timer interrupts for preemption again.
I still see timer interrupts ongoing even with CONFIG_SCHED_HRTICK.
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