Re: Scheduler regression: Too frequent timer interrupts(?)

[Christoph Lameter]

On Thu, 23 Apr 2009, Pavel Machek wrote:

> I'd say that taking interrupt and returning in below 1000nsec is
> impossible, even on very fast hw.

Hmmm.... Could it be that CONFIG_NO_HZ caused the timer interrupt to be
avoided in earlier releases? NO_HZ theory at least is to only schedule
interrupts when  necessary. So an interrupt is needed at the end of the
scheduling intervals and not at HZ frequency.


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