Basic HTML version of Foils prepared
August 7 98
Foil 19 Data-Parallel Languages
From
DoD HPF Training -- 1. Introduction to HPF DoD Training and Others --
1995-98
.
by
Chuck Koelbel -- Rice University
Data parallelism originated on SIMD machines
But has since been generalized in concept
And has been implemented on many architectures
The definition is still somewhat fuzzy
HPF is largely based on data parallelism
Other data-parallel languages of note:
C*
DataParallel C (taken from C*)
NESL
Fortran D, Fortran 90D, Vienna Fortran
Data-parallel languages provide an abstract, machine-independent model of parallelism.
Fine-grain parallel operations, such as element-wise operations on arrays
Shared data in large, global arrays with mapping ³hints²
Implicit synchronization between operations
Partially explicit communication from operation definitions
Advantages:
Global operations conceptually simple
Easy to program (particularly for certain scientific applications)
Disadvantages:
Unproven compilers
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