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Re: [RFC] Lock elision "test suite", first draft
- From: OndÅej BÃlka <neleai at seznam dot cz>
- To: libc-alpha at sourceware dot org
- Date: Mon, 2 Sep 2013 10:46:09 +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>
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, if 4/5 of tests have worse performance
there is risk that performance will be worse also in wild.