Mahmood, You can
gdb --pid=core.5383 And then bt An then disas And "scroll" until the current instruction Iirc, there is a star at the beginning of this line You can also try show maps Or info maps (I cannot remember the syntax...) Btw, did you compile lapack and friends by yourself ? Mahmood Naderan <mahmood...@gmail.com> wrote: >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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