Re: [PATCH 3/4] sched: introduce synchronized idle injection

Ingo Molnar
2015-11-27T09:17:40Z

* Peter Zijlstra <peterz@infradead.org> wrote:

> On Wed, Nov 18, 2015 at 09:36:22AM +0100, Ingo Molnar wrote:
> > What will such throttling do to latencies, as observed by user-space tasks? What's
> > the typical expected frequency of the throttling frequency that you are targeting?
>
> The default has 5ms (iirc) of forced idle, so depending on what you do,
> noticeable to outright painful.

That's absolutely painful!

Thanks,

Ingo