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pythonmpi
dangerChihuahua007
dangerChihuahua007

Reputation: 20895

Why should I use sendrecv?

I am trying to teach myself the MPI message passing interface with mpi4py. I noticed that MPI had a function called "sendrecv". However, it is not listed in mpi4py documentation: http://documen.tician.de/boostmpi/reference.html

Could I simply emulate the sendrecv function with say

  communicator.send(0xdeadbeef, dest=1, tag=0)
  data = communicator.recv(source=1, tag=0)

What does "sendrecv" do other than emulate a recv followed by a send? Where can I find mpi4py documentation that talks about it?

Upvotes: 2

Views: 1908

Answers (1)

suszterpatt
suszterpatt

Reputation: 8273

MPI_Sendrecv is a convenience function. It sends one message and receives one message, and guarantees that there will be no deadlocks due to each process waiting for another one to send.

Upvotes: 7

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