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Re: [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups
Date 2016-05-16 13:20 +0200
Message-ID <rzoJ4-6ey-25@gated-at.bofh.it> (permalink)
References <rznah-5ch-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, May 16, 2016 at 12:36:19PM +0300, Konstantin Khlebnikov wrote:
> This feature allows to change cpu cgroup weight for a limited time.
> 
> Cgroup interface:
> cpu.cfs_reserve_us      - reserved time for each cpu.cfs_period_us
> cpu.cfs_reserve_shares  - group weight during reserved time
> 
> While cfs group consumes reserved cpu time it has different weight,
> thus it gets different vruntime penalty for that execution.
> 
>         ^ weight
>         |
>         |
> reserve |
> shares  -------*
>         |      |
>         |      |
>         |      |
> shares  -      *-----------------*
>         |                        |
>         |                        |
>         0------|-----------------|-----------> time
>                reserve           quota
> 
> Reserve can work as a "low limit": boost weight for "guaranteed" time,
> and as a "high limit": give normal weight for a limited time and allow
> utilize cpu when nobody else needs it.
> 

You forgot to explain why I should care about this.

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[PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups Konstantin Khlebnikov <khlebnikov@yandex-team.ru> - 2016-05-16 11:40 +0200
  [PATCH RFC 3/3] sched/fair: pulse-weight modulation controller for  cpu cgroup Konstantin Khlebnikov <khlebnikov@yandex-team.ru> - 2016-05-16 11:40 +0200
  [PATCH RFC 1/3] sched/fair: call __refill_cfs_bandwidth_runtime  only for finite quota Konstantin Khlebnikov <khlebnikov@yandex-team.ru> - 2016-05-16 11:40 +0200
  Re: [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups Peter Zijlstra <peterz@infradead.org> - 2016-05-16 13:20 +0200
    Re: [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups Peter Zijlstra <peterz@infradead.org> - 2016-05-16 14:30 +0200
    Re: [PATCH RFC 0/3] sched/fair: cpu time reserves for cgroups Konstantin Khlebnikov <khlebnikov@yandex-team.ru> - 2016-05-16 14:30 +0200

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