Re: [OMPI users] Open MPI and Dual Core (machinefile)

[Ralph Castain]

Hi Troy I'm not sure what iteration of Linux you are using, but the 2.6 kernel has multi-core scheduling support that is supposed to resolve this problem. I don't remember if it has to be explicitly enabled or not - or if it only started with a particular 2.6.x release. You might want to check into it. Ralph Troy Telford wrote: On Fri, 02 Jun 2006 09:15:06 -0600, Troy Telford <ttelf...@linuxnetworx.com> wrote: 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...)