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From: Ethan Mallove (ethan.mallove_at_[hidden])
Date: 2006-10-20 09:51:06


Jim,

I'm not familiar with intel's built-in iteration over an
array of -np values. MTT achieves this 'multiplicative'
effect via "funclets" in the INI file. E.g.,

np = &pow(2, 0, &log(2, 60))

So you would insert the above line in the [Test run: intel]
section of the INI file. More on the above "funclet"
mechanism in MTT here:

http://svn.open-mpi.org/trac/mtt/wiki/MTTOverview#Funclets

"... &pow returns an array of values from base^min_exponent
to base^max_exponent. So in the above "np" example, ... np
would be an array of the following values: 1, 2, 4, 8 16,
32."

-Ethan

On Thu, Oct/19/2006 12:07:42PM, James W. Barker wrote:
> Ethan,
>
> I believe you are correct, $NODES and $NODELIST appear to be the only
> environmental variables associated with BProc. It would be nice if
> MTT had the "smarts to ... do that for BProc". However, before you
> invest any effort in that; how do you currently increase the number
> of processors per iteration for tests like the intel test suite? You
> can't simply set -np 2 or -np 32 because the intel test suite was
> designed to iterate, squaring the number of processors each time the
> suite is executed up to (I think) a maximum of 64 processors.
>
> Thanks,
> Jim Barker
>
> At 03:41 PM 10/18/2006, you wrote:
> >On Wed, Oct/18/2006 09:28:01AM, James W. Barker wrote:
> >> Ethan,
> >>
> >> In an email exchange with Jeff Squyres regarding setting the number
> >> of processors on a Bproc system the following statement was made:
> >>
> >> Are you running under bproc or some other scheduler? Right now, MTT
> >> understands SLURM, Torque, and LoadLeveler. If you're running under
> >> Bproc, we can easily add support for it into MTT (I'll need some
> >> information from you since I don't have any BProc systems myself).
> >>
> >> Jeff went on to say:
> >>
> >> Ethan Mallove is the engineer at Sun who is heading up most of the
> >> MTT efforts these days; the mails go to all of us, so he can reply
> >> even when I'm unavailable.
> >>
> >> So I am asking what information do you need from me to add Bproc
> >> support to MTT?
> >>
> >
> >Are NODES and NODELIST the only env vars that BProc uses (I
> >gleaned this info from
> >http://asci-training.lanl.gov/BProc/)?
> >
> >MTT is set up to detect environment variables and hostfiles
> >used by Slurm, PBS, N1GE, and LoadLeveler and set a max
> >value for -np based on those env vars. While we add the
> >smarts to MTT to do that for BProc, you could also hardcode
> >the -np value (e.g., 2) in your ini's "MPI Details" section
> >like so:
> >
> >exec = mpirun @hosts@ -np 2 --prefix &test_prefix()
> >&test_executable() &test_argv()
> >
> >Thanks,
> >Ethan
> >
> >
> >> Thanks,
> >> Jim Barker
> >>
> >> James W. Barker, Ph.D.
> >> Los Alamos National Laboratory
> >> Computer, Computational and Statistical Sciences Division
> >> Advanced Computing Laboratory - Application Communications and
> >> Performance Research Team
> >> 505-665-9558
> >>
> >>
> >> _______________________________________________
> >> mtt-users mailing list
> >> mtt-users_at_[hidden]
> >> http://www.open-mpi.org/mailman/listinfo.cgi/mtt-users
>
> James W. Barker, Ph.D.
> Los Alamos National Laboratory
> Computer, Computational and Statistical Sciences Division
> Advanced Computing Laboratory - Application Communications and
> Performance Research Team
> 505-665-9558
>
>