[Beowulf] Sharing an array in an MPI program?

Peter St. John peter.st.john at gmail.com
Thu May 24 15:05:43 PDT 2007

would it be feasible to compile the array into a DLL?

On 5/24/07, Greg Lindahl <lindahl at pbm.com> wrote:
> On Thu, May 24, 2007 at 06:05:03PM +0300, Tahir Malas wrote:
> > Each process in our parallel FORTRAN
> > 90 program holds an identical array that is used in all parts of the
> > program. However, when the size of the problem gets larger and larger,
> this
> > memory cost has started to become a memory bottleneck for us.
> This is actually a fairly frequent question.
> Some people use hybrid MPI+OpenMP in this situation. However, another
> way to attack it is to create a shared memory segment and put this
> array into it. Or, alternately, you can mmap() a file into all the
> processes with this data.
> -- greg
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