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Re: [Condor-users] MPICH2 wrapper script (mpich2script) for parallel universe



Hi Nkwebi,

I've modified my version of mp2script which now works with the "cpi" example code that MPICH2 builds when run over multiple SMP machines. Fancy testing it and reporting any feedback? One thing to note: there seems to be a bug with the current version of MPICH2 (v1.0.5p3), at least certainly when using the ch3:nemesis device, maybe even the ch3:ssm. The fix requires changing the following line in mpiexec.py (at around line 789):

Change this line:
   msgToMPD['ifhns'][loRange] = ifhn
to this:
   if ifhn:  msgToMPD['ifhns'][loRange] = ifhn

Thanks to Ralph Butler at MTSU for pointing this out, without which I couldn't get mp2script to work.

Cheers,
Mark


Nkwebi Peace Motlogelwa wrote:
Thanks Mark for the script...I just tried it and it works fine if the parallel program is executed on a single dedicated node.. The script starts mpd on the master node (rank==0 or $_CONDOR_PROCNO ==0) only, and if one has many dedicated execute nodes, the script does not start mpd on the other nodes.. Will try to modify it to get it to start mpd on all dedicated execute nodes..so far tried using mpdboot, but it seems not as straight forward to get the ring of mpd's working..

regards..

On 3/16/07, *Mark Calleja* <M.Calleja@xxxxxxxxxxxxxxx <mailto:M.Calleja@xxxxxxxxxxxxxxx>> wrote:

    Hi Nkwebi,

    I don't know if you still need this, but you can get my copy of
    mp2script at:

    http://www.escience.cam.ac.uk/~mcal00/condor/mp2script.asc
    <http://www.escience.cam.ac.uk/%7Emcal00/condor/mp2script.asc>

    Copy and paste it, and rename it as mp2script. A couple of points you
    should bear in mind: I had to put a .mpd.conf file in the home
    directory
    of the user running condor (I use dedicated condor user accounts),
    but I
    also had to set the env var MPD_CONF_FILE in the script, otherwise mpd
    failed to find the file. I also load LD_LIBRARY_PATH with the compiler
    libs I used to build mpich2 (I used ifort/icc 9.1). This script works
    fine with the "cpi" example that gets built by mpich2 in
    /path/to/mpich2/distro/examples.

    Cheers,
    Mark

    Nkwebi Peace Motlogelwa wrote:
    > Hi all... I need a working MPICH2 wrapper script for condor's
    > parallel universe...I use condor-6.8.4, but it comes with wrapper
    > scripts for LAM and MPICH1 only.. I tried to modify the
    > mpich1script, but not winning so far... anybody using condor
    > and mpich2 and willing to share their wrapper scripts?...Pls help..
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