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Subject: Re: [OMPI users] Factor of 10 loss in performance with 1.3.x
From: Steve Kargl (sgk_at_[hidden])
Date: 2009-04-07 15:32:07

On Tue, Apr 07, 2009 at 12:00:55PM -0700, Mostyn Lewis wrote:
> Steve,
> Did you rebuild 1.2.9? As I see you have static libraries, maybe there's
> a lurking phthread or something else that may have changed over time?
> DM

Yes. I downloaded 1.2.9, 1.3, and 1.3.1, all within minutes of each
other. All are configured with --enable-static --disable-shared.
Each is installed in its own directory under /usr/local and
I use full patch names to mpicc and mpiexec.

I just rebuilt 1.3.1 without --enable-static --disable-shared.
There is no change in performance. 1.3.1 is a factor of 10
slower than 1.2.9 with messages of ~10KB and smaller.

I've used svn to grab trunk. Once I determine how to build
the trunk, I'll do a binary search to see if I can identify
the revision where the problem first occurs.