On Apr 25, 2008, at 2:06 PM, Gregory John Orris wrote:
produces a core dump on a machine with 12Gb of RAM. and the error message mpiexec noticed that job rank 0 with PID 75545 on node mymachine.com exited on signal 4 (Illegal instruction). However, substituting in float *X = new float[n]; for float X[n]; Succeeds!
You're running off the end of the stack, because of the large amount of data you're trying to put there. OS X by default has a tiny stack size, so codes that run on Linux (which defaults to a much larger stack size) sometimes show this problem. Your best bets are either to increase the max stack size or (more portably) just allocate everything on the heap with malloc/new.
Hope this helps, Brian -- Brian Barrett Open MPI developer http://www.open-mpi.org/
