Re: 'perf stat --repeat N' oddity/regression

From	Arnaldo Carvalho de Melo <acme@kernel.org>
Newsgroups	linux.kernel
Subject	Re: 'perf stat --repeat N' oddity/regression
Date	2016-01-26 15:20 +0100
Message-ID	<qVcDo-5i7-23@gated-at.bofh.it> (permalink)
References	(4 earlier) <qUU3N-830-33@gated-at.bofh.it> <qUUdu-88K-59@gated-at.bofh.it> <qUVjd-pt-17@gated-at.bofh.it> <qUVjd-pt-15@gated-at.bofh.it> <qV6Rk-1gU-13@gated-at.bofh.it>
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Em Tue, Jan 26, 2016 at 09:08:22AM +0100, Ingo Molnar escreveu:
> 
> * Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> 
> > Em Mon, Jan 25, 2016 at 04:43:33PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Mon, Jan 25, 2016 at 07:35:11PM +0100, Ingo Molnar escreveu:
> > > > 
> > > > So it appears it broke somewhere between v4.0 and v4.1, as the v4.0 install 
> > > > displays:
> > > > 
> > > >     16,244,802,268      instructions               ( +- 23.01% )
> > > > 
> > > >        2.108676769 seconds time elapsed                                          ( +-  0.86% )
> > > > 
> > > > 
> > > > [a few minutes later]
> > > > 
> > > > Bisected it down to:
> > > 
> > > Mel Gorman reported this and Jiri provided a patch that Mel tested and
> > > verified that it fixed, checking where it is sitting now...
> > 
> > I already sent it your way, its:
> > 
> >     198 N C 01/21 Arnaldo Carvalh (1.4K) ├─>[PATCH 06/16] perf stat: Do not clean event's private stats
> > 
> > Please pull my perf-core-for-mingo tag and you should get it, its an one
> > liner.
> 
> Hm, are all of those changes fixes? If not then mind splitting them into a 
> perf/urgent portion as well?

Ok, doing that...

- Arnaldo

Thread

'perf stat --repeat N' oddity/regression Ingo Molnar <mingo@kernel.org> - 2016-01-25 19:30 +0100
  Re: 'perf stat --repeat N' oddity/regression Ingo Molnar <mingo@kernel.org> - 2016-01-25 19:40 +0100
    Re: 'perf stat --repeat N' oddity/regression Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-25 20:50 +0100
      Re: 'perf stat --repeat N' oddity/regression Ingo Molnar <mingo@kernel.org> - 2016-01-26 09:10 +0100
        Re: 'perf stat --repeat N' oddity/regression Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-26 15:20 +0100
    Re: 'perf stat --repeat N' oddity/regression Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-25 20:50 +0100

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