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Re: Potential scheduler regression

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On Wed, Jul 05, 2017 at 11:42:46AM -0400, Ben Guthro wrote:
> Hello,
> 
> I've been in the process of updating our kernel in our appliance VM
> from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y)
> - and ran into a performance regression, when our QA team was running
> some regression suites.
> 
> 
> I bisect this behavior to the following commit, introduced in the 4.9
> merge window:
> 

Could you test a later kernel that includes commit:

  1ad3aaf3fcd2 ("sched/core: Implement new approach to scale select_idle_cpu()")

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Potential scheduler regression Ben Guthro <ben@guthro.net> - 2017-07-05 17:50 +0200
  Re: Potential scheduler regression Peter Zijlstra <peterz@infradead.org> - 2017-07-05 18:50 +0200
    Re: Potential scheduler regression Ben Guthro <ben@guthro.net> - 2017-07-07 23:00 +0200
      Re: Potential scheduler regression Peter Zijlstra <peterz@infradead.org> - 2017-07-10 11:30 +0200
        Re: Potential scheduler regression Greg KH <gregkh@linuxfoundation.org> - 2017-07-10 17:30 +0200
          Re: Potential scheduler regression Ben Guthro <ben@guthro.net> - 2017-07-10 17:50 +0200
            Re: Potential scheduler regression Ingo Molnar <mingo@kernel.org> - 2017-07-11 10:40 +0200
              Re: Potential scheduler regression Greg KH <gregkh@linuxfoundation.org> - 2017-07-11 12:00 +0200
                Re: Potential scheduler regression Ben Guthro <ben@guthro.net> - 2017-07-13 21:30 +0200
                Re: Potential scheduler regression Greg KH <gregkh@linuxfoundation.org> - 2017-07-14 09:00 +0200

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