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Re: [RFC] Lock elision "test suite", first draft
- From: Dominik Vogt <vogt at linux dot vnet dot ibm dot com>
- To: libc-alpha at sourceware dot org
- Date: Mon, 2 Sep 2013 11:06:06 +0200
- Subject: Re: [RFC] Lock elision "test suite", first draft
- Authentication-results: sourceware.org; auth=none
- References: <20130806093649 dot GA23477 at linux dot vnet dot ibm dot com> <20130807120723 dot GA7829 at linux dot vnet dot ibm dot com> <20130807122010 dot GB5794 at domone dot kolej dot mff dot cuni dot cz> <20130809081846 dot GA6124 at linux dot vnet dot ibm dot com> <20130902084608 dot GA10702 at domone dot kolej dot mff dot cuni dot cz>
- Reply-to: libc-alpha at sourceware dot org
On Mon, Sep 02, 2013 at 10:46:09AM +0200, OndÅej BÃlka wrote:
> On Fri, Aug 09, 2013 at 10:18:46AM +0200, Dominik Vogt wrote:
> > On Wed, Aug 07, 2013 at 02:20:10PM +0200, OndÅej BÃlka wrote:
> snip
> > > > elision on:
> > > > -----------
> > > > pct_best 593.48...%
> > > > pct_mindev: 5.73...%
> > > > pct_maxdev: 4.09...%
> > > > pct_stddev: 3.43...%
> > > >
> > > Do you know why elision is 6 times slower on this test?
> >
> > The throughput is six times of the throughput without elision.
> > The percentages of pct_best are relative performance compared with
> > glibc-2.15.
> >
> > Vice versa, an explanation is needed for the performance of the
> > tests 1, 2, 4 and 5. I'm working on that and will post individual
> > analyses of the tests soon.
> >
> We are waiting for analysis,
I have looked at the aborts of all of these tests, but I now have
to wait for more information from the IBM hardware developers -
hopefully this week. I'll present detailed analyses then.
Ciao
Dominik ^_^ ^_^
--
Dominik Vogt
IBM Germany