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Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and SPECjvm2008 benchmarks against 4.6 kernel
Date 2016-06-24 10:10 +0200
Message-ID <rNulz-5yG-3@gated-at.bofh.it> (permalink)
References (1 earlier) <rKJh7-2MG-9@gated-at.bofh.it> <rKOA9-69f-9@gated-at.bofh.it> <rNhHH-5Aq-13@gated-at.bofh.it> <rNhRn-5Ej-5@gated-at.bofh.it> <rNu2d-5cW-7@gated-at.bofh.it>
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On Fri, Jun 24, 2016 at 09:44:41AM +0200, Jirka Hladky wrote:
> I have double checked default settings and
> 
> kernel.sched_autogroup_enabled
> 
> is by default ON both in 4.6 and 4.7 kernel.

Yeah, if you enable that CONFIG its default enabled. In any case, I'll
go trawl through the cgroup code now. I spend yesterday looking at the
'wrong' part things.

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Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-16 18:40 +0200
  Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-16 19:30 +0200
    Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-17 01:10 +0200
      Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-21 15:30 +0200
      Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 09:20 +0200
        Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 10:00 +0200
          Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 10:00 +0200
            Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 12:10 +0200
              Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 13:20 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 14:40 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 14:50 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 16:50 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-22 23:00 +0200
        Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-22 10:30 +0200
      Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-23 20:40 +0200
        Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-23 20:50 +0200
          Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-24 09:50 +0200
            Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 10:10 +0200
              Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-24 10:30 +0200
            Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-24 14:10 +0200
              Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-24 14:40 +0200
              Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 14:40 +0200
            Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 14:10 +0200
              Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Vincent Guittot <vincent.guittot@linaro.org> - 2016-06-24 14:50 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 15:10 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Vincent Guittot <vincent.guittot@linaro.org> - 2016-06-24 15:30 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 15:40 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 15:50 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-24 15:10 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 15:50 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Peter Zijlstra <peterz@infradead.org> - 2016-06-24 18:00 +0200
                Re: Kernel 4.7rc3 - Performance drop 30-40% for SPECjbb2005 and  SPECjvm2008 benchmarks against 4.6 kernel Jirka Hladky <jhladky@redhat.com> - 2016-06-25 00:20 +0200

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