Re: [PATCH] x86: Reduce the default HZ value

[Christoph Lameter]

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.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/