[MPICH] Can I ask MPI to not copy the data to shared-mem ?

[Jean-Marc Saffroy]

On Tue, 9 Oct 2007, Darius Buntinas wrote:

> Hmm.  I can't see a way that an MPI implementation could (efficiently 
> and reliably) check that two virtual addresses from different processes 
> point to the same location in a shared memory region.  An MPI 
> implementation wouldn't have enough information to do what you're 
> asking.

It could very well have this information from the operating system.
On Linux, /proc/self/maps has all the required details.


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