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I'm trying to run some software parallelised through mpich2.
I have the daemon running (mpd).
I then launch the software: nohup mpiexec -n 8 /path/to/software/softwarename.ex > out 2> err &
and when I check with "ps aux" I can see I have 8 copies of the software running and 8 listings of mpd, however according to "top", these processes are running at 0%, and indeed there is no output - it just hangs.
This happens on some computers, but not on others, so I can rule out a problem with the software itself.
Does anyone know what's wrong? Until I fix this I can barely do any calculations, so I'm quite desperate to get it working. I've tried restarting the computer, and also re-installing Mpich2 using shm instead of nemesis (since it's simply running on a multi-core computer) but without any change in the situation.
For future reference: I did a work-around by deleting mpich2 and installing openmpi instead... it requires re-compilation of any software that was originally compiled for mpich2, but once that's done it works fine, and apparently without the need for an mpd like mpich2 needed.