On Fri, 02 Jun 2006 09:15:06 -0600, Troy Telford
Can you confirm that your Linux installation thinks that it has 4
processors and will schedule 4 processes simultaneously?
D'oh. Still too early in the morning...
OK, Linux thinks it has two CPUs. Period.
For some reason I forgot that 'cpuinfo' simply returns what the CPU
reports... so the CPU knows it's dual-core, and reports this. That
doesn't mean Linux has to recognize that there are really 4 CPUs...
So, problem solved (at least from Open MPI's standpoint...)