PICL

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Abstract
PICL is a subroutine library that can be used to develop parallel programs that are portable across several distributed memory multiprocessors. The library provides portable syntax for the key communication primitives and related system calls required to program these machines It also provides portable routines to perform certain widely-used, high-level communication operations, such as global broadcast and global sum. Finally, the library provides an execution tracing facility that can be used to monitor performance or to aid in debugging. This report is the PICL reference manual for C programmers. It contains full descriptions of all PICL routines as well as explanations on how to use the routines to write a parallel program. A short users' guide to PICL containing examples of how to use it is available as a separate report.

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