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

From: Ingo Molnar
Date: Fri Nov 27 2015 - 04:17:45 EST



* Peter Zijlstra <peterz@xxxxxxxxxxxxx> 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
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