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Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy

From Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Newsgroups linux.kernel
Subject Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy
Date 2015-08-19 01:50 +0200
Message-ID <pYYNI-5lR-9@gated-at.bofh.it> (permalink)
References (4 earlier) <pU31E-5mp-7@gated-at.bofh.it> <pU81k-483-27@gated-at.bofh.it> <pYGnL-3k7-5@gated-at.bofh.it> <pYGnL-3k7-3@gated-at.bofh.it> <pYVPQ-im-11@gated-at.bofh.it>
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On 2015/08/19 5:31, Tejun Heo wrote:
> Hello, Paul.
>
> On Mon, Aug 17, 2015 at 09:03:30PM -0700, Paul Turner wrote:
>>> 2) Control within an address-space.  For subsystems with fungible resources,
>>> e.g. CPU, it can be useful for an address space to partition its own
>>> threads.  Losing the capability to do this against the CPU controller would
>>> be a large set-back for instance.  Occasionally, it is useful to share these
>>> groupings between address spaces when processes are cooperative, but this is
>>> less of a requirement.
>>>
>>> This is important to us.
>
> Sure, let's build a proper interface for that.  Do you actually need
> sub-hierarchy inside a process?  Can you describe your use case in
> detail and why having hierarchical CPU cycle distribution is essential
> for your use case?

An actual per-thread use case in our customers is qemu-kvm + cpuset.
customers pin each vcpus and qemu-kvm's worker threads to cpus.
For example, pinning 4 vcpus to cpu 2-6 and pinning qemu main thread and
others(vhost) to cpu 0-1.

This is an actual kvm tuning on our customers for performance guarantee.

In another case, cpu cgroup's throttling feature is used per vcpu for vm cpu sizing.

Thanks,
-Kame

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Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-04 17:20 +0200
  Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Peter Zijlstra <peterz@infradead.org> - 2015-08-05 11:20 +0200
    Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-05 16:40 +0200
      Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-17 22:40 +0200
      Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-18 06:10 +0200
        Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-18 22:40 +0200
          Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> - 2015-08-19 01:50 +0200
            Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-19 18:30 +0200
          Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-19 05:30 +0200
            Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-19 18:50 +0200
              Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-20 06:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-20 10:00 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-20 10:50 +0200
          Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-21 21:30 +0200
            Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-22 20:40 +0200
              Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-08-24 17:50 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-24 19:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-08-24 21:30 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-08-24 22:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-24 22:30 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-24 23:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-24 23:20 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-24 23:20 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-24 23:00 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-24 23:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-24 23:20 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-24 23:30 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-24 23:50 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-25 00:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-25 01:00 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-25 01:20 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> - 2015-08-25 04:40 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-25 23:20 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Ingo Molnar <mingo@kernel.org> - 2015-08-25 11:30 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Peter Zijlstra <peterz@infradead.org> - 2015-08-25 12:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-25 21:20 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-24 23:20 +0200
              Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-24 23:00 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-24 23:40 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-25 00:00 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-25 00:20 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Paul Turner <pjt@google.com> - 2015-08-25 01:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-08-25 23:10 +0200
                Re: [PATCH 3/3] sched: Implement interface for cgroup unified  hierarchy Tejun Heo <tj@kernel.org> - 2015-09-02 19:10 +0200

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