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Subject: [OMPI users] Behavior of MPI_Send
From: Charles Salvia (chsalvia_at_[hidden])
Date: 2009-11-15 12:25:53

I'm confused about the required behavior of MPI_Send() using TCP sockets.
Does a call to MPI_Send() block until the receiving process actually
receives the message, or does MPI_Send() only block until the send operation
completes locally? In other words, does the sender actually have to wait
for an ACK from the receiver to proceed?

-Charles Salvia