This is also true for a multi-processor machine, or its unique to multi-core machines? -gideon
On Nov 13, 2007, at 11:14 AM, Barry Smith wrote: > > Not possible. The problem is that with one process it uses all > the memory > bandwidth, when you change to use 2 processes (2 cores) each core > now gets only half the memory bandwidth and hence essentially half > the speed. > > Barry > > > Barry > > On Nov 13, 2007, at 10:06 AM, Gideon Simpson wrote: > >> Has anyone had any success in getting good performance on multi- >> core intel os x machines with petsc? What's the right way to get >> MPICH up and running for such a thing? >> >> -Gideon Simpson >> Department of Applied Physics and Applied Mathematics >> Columbia University >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20071113/bf3355c4/attachment.htm>
