So if you were running a.out and b.out in some master/slave application, would
the a.out process be able to write into the memory of the b.out process? I
don't think that any additional protections are needed for MPI beyond
> Under Puma, an application can shoot itself
> in the foot, but it is not allowed to harm the OS or
> other applications. Puma does not protect an application
> from itself.
> Does your SHMALLOC allow me to specify the 'real' address?
> Or will it simply malloc space out of my heap and return
> this 'real' address?
It will come off of the heap. Locally, the address returned by MPI_SHMALLOC()
is a real pointer to a new memory region. When this address is passed to
MPI_PUT() and MPI_GET(), magic happens to translate the local address into the
appropriate remote address so that the bits can be sent to the correct place.
-- Eric Salo Silicon Graphics Inc. "Do you know what the (415)390-2998 2011 N. Shoreline Blvd, 7L-802 last Xon said, just firstname.lastname@example.org Mountain View, CA 94043-1389 before he died?"