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
>
>
