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Date:	Thu, 19 Jun 2014 12:48:52 -0700
From:	Darren Hart <>
To:	Arnaldo Carvalho de Melo <>
Cc:	Davidlohr Bueso <>,,,,
Subject: Re: [PATCH 9/9] perf bench: futex: Support operations for shared

On Thu, 2014-06-19 at 14:05 -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Jun 19, 2014 at 09:43:49AM -0700, Davidlohr Bueso escreveu:
> > On Thu, 2014-06-19 at 13:41 -0300, Arnaldo Carvalho de Melo wrote:
> > > Em Mon, Jun 16, 2014 at 11:14:27AM -0700, Davidlohr Bueso escreveu:
> > > > Unlike futex-hash, requeuing and wakeup benchmarks do not support
> > > > shared futexes, limiting the usefulness of the programs. Correct
> > > > this, and allow using the local -S parameter. The default remains
> > > > using private futexes.
> > > 
> > > Also isn't this benchmark related to something Darren did? Just checking
> > > why he isn't in the CC list, Darren, does this all sound fine to you?
> > 
> > Darren is well aware of these benchmarks, and we've discussed the topic
> > in the past. This change doesn't conflict with what he maintains in the
> > futextest suite.
> Ok, thanks, just checking :-)

Right. The plan, for the record, is to augment functional tests in
futextest and move all performance related tests to perf. Davidlohr's
tests are independent from those in futextest. I haven't done an
exhaustive comparison to see if there is overlap, but since he got to
perf first, we'll determine which futextest/performance tests add value
and add tose, and deep six the rest.

The functional tests may then be moved to linux/tools and futextest will
then be obsolete.

Darren Hart
Intel Open Source Technology Center

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