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Re: [PATCH 4/4] sched,time: only call account_{user,sys,guest,idle}_time once a jiffy

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH 4/4] sched,time: only call account_{user,sys,guest,idle}_time once a jiffy
Date 2016-02-01 10:30 +0100
Message-ID <qXiY2-wH-15@gated-at.bofh.it> (permalink)
References <qXcfT-45K-3@gated-at.bofh.it> <qXcfU-45K-21@gated-at.bofh.it>
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On Sun, Jan 31, 2016 at 09:12:31PM -0500, riel@redhat.com wrote:
> Run times for the microbenchmark:
> 
> 4.4				3.8 seconds
> 4.5-rc1				3.7 seconds
> 4.5-rc1 + first patch		3.3 seconds
> 4.5-rc1 + first 3 patches	3.1 seconds
> 4.5-rc1 + all patches		2.3 seconds

Would be good to compare that also to a !NOHZ_FULL bloated path.

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[PATCH 0/4 v3] sched,time: reduce nohz_full syscall overhead 40% riel@redhat.com - 2016-02-01 03:20 +0100
  [PATCH 2/4] acct,time: change indentation in __acct_update_integrals riel@redhat.com - 2016-02-01 03:20 +0100
  [PATCH 4/4] sched,time: only call account_{user,sys,guest,idle}_time once a jiffy riel@redhat.com - 2016-02-01 03:20 +0100
    Re: [PATCH 4/4] sched,time: only call  account_{user,sys,guest,idle}_time once a jiffy Peter Zijlstra <peterz@infradead.org> - 2016-02-01 10:30 +0100
      Re: [PATCH 4/4] sched,time: only call  account_{user,sys,guest,idle}_time once a jiffy Rik van Riel <riel@redhat.com> - 2016-02-01 20:30 +0100
  [PATCH] perf tooling: Simplify 'perf bench syscall' Ingo Molnar <mingo@kernel.org> - 2016-02-01 08:50 +0100
  Re: [PATCH] perf tooling: Add 'perf bench syscall' benchmark Andy Lutomirski <luto@amacapital.net> - 2016-02-01 16:50 +0100
    Re: [PATCH] perf tooling: Add 'perf bench syscall' benchmark Ingo Molnar <mingo@kernel.org> - 2016-02-03 11:30 +0100

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