MPI: MessagePassing Interface

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MPI Message-Passing Interface

• Presented By Joe Schmitz

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Network Programming

• The network is the computer.
• Basic examples of network programming
• Security
• Database Connectivity
• Network protocols for HTTP, TCP, and UDP.

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Networking Technologies
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Problem Definition

• How different systems can communicate with each
  other.

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Description of Technology

• A message-passing library specification --
  message-passing model -- not a compiler
  specification -- not a specific product
• For parallel computers, clusters, and
  heterogeneous networks

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Description of Technology
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Programming Example

• include ltstdio.hgt
• include "mpi.h"
• int main(int argc, char argv)
• int rank, size //process rank and number of
  processes
• MPI_Init(argc, argv) //MPI initialize
• MPI_Comm_size(MPI_COMM_WORLD, size)
• MPI_Comm_rank(MPI_COMM_WORLD, rank)
• printf("Hello world from process d of d\n",
  rank, size)
• MPI_Finalize() //MPI finalize
• return 0

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References

• MPI-2 Extensions to the Message-Passing
  Interface, University of Tennessee, 1997.
• Wikimedia Foundation, Anonymous, Wikipedia,
  Message Passing Interface, Date accessed Sept.
  28, 2005, http//en.wikipedia.org/wiki/Message_Pas
  sing_Interface
• University of Kassel, Anonymous, Parawiki, MPI
  Parallel Programming, Feb., 23, 2005,
  http//parawiki.plm.eecs.uni-kassel.de/parawiki/in
  dex.php/MPI
• Gropp, William, Argonne National Laboratory,
  Argonne, IL, http//www-unix.mcs.anl.gov/mpi/tutor
  ial/gropp/talk.htmlNode0