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Re^5: MPICH2 version always runs in a single processor (Linux 64-bit)

Miro Moman
edelmiro.moman@gmail.com

OK. The problem was that both mpirun and mpixec where pointing to the openmpi executables and not to the mpich2 executables.

After changing the symbolic links via update-alternatives, everything is working now.

Time for a real example.

Thanks a million!

Miro


On Mon Jun 21 '10 3:06pm, Alex Granovsky wrote
----------------------------------------------
>Hi,

>Check (using ldd) that Firefly is indeed using mpich2 version of libmpich.so.1.1

>E.g., on our systems:

>[root@duath2]# ldd ./firefly
>    linux-gate.so.1 =>  (0x00370000)
>    libm.so.6 => /lib/libm.so.6 (0x492c2000)
>    libmpich.so.1.1 => /opt/mpich2/lib/libmpich.so.1.1 (0x00111000)
>    libpthread.so.0 => /lib/libpthread.so.0 (0x492f1000)
>    librt.so.1 => /lib/librt.so.1 (0x49465000)
>    libc.so.6 => /lib/libc.so.6 (0x49183000)
>    /lib/ld-linux.so.2 (0x487b4000)

>Next, check if mpiexec you are running is of mpich2 distribution.

>Finally, the correct command line (as was already discussed several times) would be something like:

>mpiexec -np 16 /home/mirix/Downloads/firefly/firefly -r -f -p -stdext -i /home/mirix/jobs/test.inp -o /home/mirix/jobs/test.out -ex /home/mirix/Downloads/firefly -t /disk/scratch/firefly/job1

>Regards,
>Alex

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