Hi, After upgrading OpenMPI (from 1.6.5 to 2.0.0) and my program (from 3.2 to 4.0), still the parallel run aborts with the "Illegal instruction" error in the middle on the run.
I wonder why this happens and how can I debug more? How can I find that this error is related to the program itself, mpi or system libraries? Gilles gave a suggestion about using ulimit to create a core file ( https://mail-archive.com/users@lists.open-mpi.org/msg29919.html). Please see the following: mahmood@cluster:tran$ cat sc.sh #!/bin/bash ulimit -c unlimited exec /share/apps/siesta/siesta-4.0/tpar/transiesta < trans-cc.fdf mahmood@cluster:tran$ cat hosts.txt compute-0-1 mahmood@cluster:tran$ hostname cluster mahmood@cluster:tran$ #/share/apps/siesta/openmpi-2.0.0/bin/mpirun -hostfile hosts.txt -np 15 sc.sh .... -------------------------------------------------------------------------- mpirun noticed that process rank 0 with PID 5383 on node compute-0-1 exited on signal 4 (Illegal instruction). -------------------------------------------------------------------------- Now I see a file core.5383 It is a very huge file (1290018816 bytes)!!! How can I process that? Regards, Mahmood
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