On Jun 2, 2010, at 11:14 AM, guillaume ranquet wrote: >> What happens if you run: >> >> ~/openmpi-1.4.2-bin/bin/mpirun --mca btl openib,sm,self >> ~/bwlat/mpi_helloworld >> >> (i.e., MX support is still compiled in, but remove MX from the run-time) > > sadly, exactly the same thing :( > it doesn't seems to disable MX (as the Error message is still there, I'm > just guessing, as I said I don't really know anything about MPI :-/).
What if you explicitly disable MX? ~/openmpi-1.4.2-bin/bin/mpirun --mca btl openib,sm,self --mca btl ^mx ~/bwlat/mpi_helloworld >> Does the same error happen if he tries on a MX host that does not have IB? > this node only has a myrinet card, > > $ mpirun ~/bwlat/mpi_helloworld > warning:regcache incompatible with malloc > Hello world from process 0 of 1 > > note that this is with openmpi-1.4.1 Ok, there is no segfault when it can't find IB. Which version of OMPI are you running on the IB nodes? 1.4.2? I can try to write a patch that does not alter the mpool if MX is not available. Scott
