The principle of ID-less communication in the BLACS

Abstract

The BLACS is a communication library for linear algebra computing on distributed memory parallel computing systems. ID-less communication is one of features of the BLACS. ID-less communication means that the no message ID is carried during communication. ID-less communication is important to strengthen programmability of the BLACS and improve quality of parallel applications. The point to point communication, broadcast, and combine in the BLACS based on MPI are taken as examples to analyze the principle of ID-less communication in this paper.