PICL. Portable Instrumented Communication Library
George A. Geist, Michael T. Heath, Barry W. Peyton, P.H. Worley · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1990
PICL is a subroutine library that can be used to develop parallel programs that are portable across several distributed-memory multiprocessors. PICL provides a portable syntax for key communication primitives and related system calls. It also provides portable routines to perform certain widely-used, high-level communication operations, such as global broadcast and global summation. PICL provides execution tracing that can be used to monitor performance or to aid in debugging.