Avoid message passing1

• The sender must know too much about the receiver

  • does the thread still exist?
  • where is it?
  • is it running?
  • is it ready for this message?

• Assembling and disassembling messages is expensive

  • especially with a subroutine interface

• MPI-2 “single-sided” messaging is not much better

  • the receiver has to set up a region
  • the sender still has to know too much

• Message passing is okay for client-server applications

  • but it will more likely be DCOM than MPI

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