Basic HTML version of Foils prepared 24 August 98

Foil 39 Parallel Languages

From Master Foilset for CPS615 Introduction -- Material from Culler and Koelbel Computational Science for Simulations -- Fall Semester 1998. by Geoffrey C. Fox, Nancy McCracken


1 A parallel language provides an executable notation for implementing a parallel algorithm.
2 Design criteria:
  • How are parallel operations defined?
    • static tasks vs. dynamic tasks vs. implicit operations
  • How is data shared between tasks?
    • explicit communication/synchronization vs. shared memory
  • How is the language implemented?
    • low-overhead runtime systems vs. optimizing compilers
3 Usually a language reflects a particular style of expressing parallelism.
4 Data parallel expresses concept of identical algorithm on different parts of array
5 Message parallel expresses fact that at low level parallelism implis information is passed between different concurrently executing program parts

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