Re: [RESEND PATCH v2 1/2] sched/rt: add utilization tracking

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [RESEND PATCH v2 1/2] sched/rt: add utilization tracking
Date	2017-08-08 16:10 +0200
Message-ID	<ucdmP-10i-29@gated-at.bofh.it> (permalink)
References	<uaL9f-7DN-11@gated-at.bofh.it> <uaL9g-7DN-21@gated-at.bofh.it> <ubTo6-2M8-17@gated-at.bofh.it> <ucdd7-Hf-1@gated-at.bofh.it>
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On Tue, Aug 08, 2017 at 03:56:26PM +0200, Vincent Guittot wrote:
> 
> I don't think that IRQ tracking patch is working.
> update_irq_load_avg(rq->clock, cpu_of(rq), rq, 1); is called in
> update_rq_clock_task() which is never called in irq context. In order
> to use PELT for tracking irq and paravirt, we should call
> update_irq_load_avg() for every context switch between irq/paravirt
> and task which will probably be too heavy. Nevertheless, we can
> 

Right, realized the same much later yesterday...

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[RESEND PATCH v2 0/2] sched/rt: track rt rq utilization Vincent Guittot <vincent.guittot@linaro.org> - 2017-08-04 15:50 +0200
  [RESEND PATCH v2 2/2] cpufreq/schedutil: add rt utilization tracking Vincent Guittot <vincent.guittot@linaro.org> - 2017-08-04 15:50 +0200
  [RESEND PATCH v2 1/2] sched/rt: add utilization tracking Vincent Guittot <vincent.guittot@linaro.org> - 2017-08-04 15:50 +0200
    Re: [RESEND PATCH v2 1/2] sched/rt: add utilization tracking Peter Zijlstra <peterz@infradead.org> - 2017-08-07 18:50 +0200
      Re: [RESEND PATCH v2 1/2] sched/rt: add utilization tracking Vincent Guittot <vincent.guittot@linaro.org> - 2017-08-08 16:00 +0200
        Re: [RESEND PATCH v2 1/2] sched/rt: add utilization tracking Peter Zijlstra <peterz@infradead.org> - 2017-08-08 16:10 +0200

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