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

[Christoph Lameter]

On Fri, 17 Apr 2009, Peter Zijlstra wrote:

> This has never been true afaikt, as long as we have a task running, we
> take the interrupt, I just looked at the .22 code and that certainly
> expects the scheduler_tick() to be called when there is a running
> process.
>
> Also, look at /proc/interrupts if you want to determine interrupt
> frequency.

I am mainly interested in limited the number and length of cpu holdoffs.

If the timer interrupt is always taken then it must take less than 1 usec
in certain versions of the kernel in order to not show up in the
statistics gathered.


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