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

From Ingo Molnar <mingo@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH 3/4] sched: introduce synchronized idle injection
Date 2015-11-27 10:20 +0100
Message-ID <qznma-UI-11@gated-at.bofh.it> (permalink)
References <qusFP-2eI-3@gated-at.bofh.it> <qusFQ-2eI-21@gated-at.bofh.it> <qw6rv-qW-9@gated-at.bofh.it> <qw8jD-1Fc-7@gated-at.bofh.it>
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* 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
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Re: [PATCH 3/4] sched: introduce synchronized idle injection Ingo Molnar <mingo@kernel.org> - 2015-11-18 09:40 +0100
  Re: [PATCH 3/4] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-18 11:40 +0100
    Re: [PATCH 3/4] sched: introduce synchronized idle injection Morten Rasmussen <morten.rasmussen@arm.com> - 2015-11-18 13:30 +0100
      Re: [PATCH 3/4] sched: introduce synchronized idle injection Peter Zijlstra <peterz@infradead.org> - 2015-11-18 14:00 +0100
        Re: [PATCH 3/4] sched: introduce synchronized idle injection Morten Rasmussen <morten.rasmussen@arm.com> - 2015-11-18 15:10 +0100
          Re: [PATCH 3/4] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-18 16:00 +0100
            Re: [PATCH 3/4] sched: introduce synchronized idle injection Morten Rasmussen <morten.rasmussen@arm.com> - 2015-11-18 16:10 +0100
              Re: [PATCH 3/4] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-18 16:20 +0100
                Re: [PATCH 3/4] sched: introduce synchronized idle injection Thomas Gleixner <tglx@linutronix.de> - 2015-11-18 16:30 +0100
                Re: [PATCH 3/4] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-18 20:00 +0100
                Re: [PATCH 3/4] sched: introduce synchronized idle injection Morten Rasmussen <morten.rasmussen@arm.com> - 2015-11-18 17:10 +0100
    Re: [PATCH 3/4] sched: introduce synchronized idle injection Ingo Molnar <mingo@kernel.org> - 2015-11-27 10:20 +0100
  Re: [PATCH 3/4] sched: introduce synchronized idle injection Jacob Pan <jacob.jun.pan@linux.intel.com> - 2015-11-18 15:20 +0100
    Re: [PATCH 3/4] sched: introduce synchronized idle injection Ingo Molnar <mingo@kernel.org> - 2015-11-27 10:20 +0100
  Re: [PATCH 3/4] sched: introduce synchronized idle injection Arjan van de Ven <arjan@linux.intel.com> - 2015-11-18 15:30 +0100

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