Yes. MPI_SEND is allowed to block, but may not always (usually
depending on the size of the message).
There have been a lot of discussions about this topic on this list --
you might want to search the archives for related threads.
On Mar 8, 2005, at 11:52 AM, Kumar, Ravi Ranjan wrote:
> Hello,
>
> I am using blocking MPI_send/MPI_recv in my code. It runs perfect for
> smaller
> array size ( T[51][51][51] ) problem but it starts giving problem for
> larger
> array size ( T[101][101][101] ). Sometimes code gives correct result
> for larger
> array size prob and sometimes it hangs in the mid of its execution.
> What can be
> the reason for this? Anyone pls explain. Can this be due to *blocking*
> send/recv??
>
> Thanks,
>
> Ravi R. Kumar
>
>
>
>
>
>
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{+} Jeff Squyres
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{+} http://www.lam-mpi.org/
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