Hi all, I've been beating my head on this for quite a while now. I don't have this problem when running with 1,2, or 3 procs, however, once I get to 4 or beyond, I have a problem.
When I call malloc, I get this error: txserver:11055 terminated with signal 11 at PC=2b46886bc18a SP=7fff20f51030. Backtrace: /apps/x86_64/mpi/openmpi/gcc-4.3.4/openmpi-1.4.3_oobpr/lib/libopen-pal.so.0( *opal_memory_ptmalloc2_int_malloc+0x54a*)[0x2b46886bc18a] /apps/x86_64/mpi/openmpi/gcc-4.3.4/openmpi-1.4.3_oobpr/lib/libopen-pal.so.0[0x2b46886bd4f3] txserver[0x415769] txserver[0x40da8c] txserver[0x4344bb] txserver[0x4351cd] txserver[0x40e3d4] /lib64/libc.so.6(__libc_start_main+0xf4)[0x2b468a5af994] txserver(_ZNSt8ios_base4InitD1Ev+0x39)[0x40c889] However, only rank 0 calls this function. Which is strange. I can just put a dummy malloc in there (int * dummy = (int *)malloc(10);) for example, and it will still crash. Again, this does not happen with n < 4 procs. The crash happens on rank 0, as it's the only rank that calls this code... I'm perplexed. Thanks a lot, J.D.