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Re: [PATCH][BZ #13065] New pthread_barrier algorithm to fulfill barrier destruction requirements.
- From: Torvald Riegel <triegel at redhat dot com>
- To: "Paul E. Murphy" <murphyp at linux dot vnet dot ibm dot com>
- Cc: GLIBC Devel <libc-alpha at sourceware dot org>, "Carlos O'Donell" <carlos at redhat dot com>, David Miller <davem at davemloft dot net>
- Date: Wed, 23 Dec 2015 13:08:23 +0100
- Subject: Re: [PATCH][BZ #13065] New pthread_barrier algorithm to fulfill barrier destruction requirements.
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On Tue, 2015-12-22 at 17:36 -0600, Paul E. Murphy wrote:
> On 12/21/2015 02:34 PM, Torvald Riegel wrote:
> > On Fri, 2015-12-18 at 17:47 -0600, Paul E. Murphy wrote:
> >> Otherwise, it looks good to me, and seems like a good improvement to
> >> have. Though, a more experienced reviewer may have more to say. This
> >> is a bit more complicated than its predecessor. I'll test it on PPC
> >> next week.
> > Thanks!
> Tested out fine on POWER8/PPC64LE.
Thanks for testing!
> I was curious what the performance
> difference might be, so I slapped together the attached program. It
> showed about 25% improvement with 64 thread/64 count/100000 iter input
> on a 16 core machine.
Nice. I'd hope that when adding proper spinning, we should be able to
improve performance / scalability further. Do you perhaps want to add
your test to our microbenchmarks?