METHOD, PROGRAM, AND PARALLEL COMPUTER SYSTEM FOR SCHEDULING PLURALITY OF COMPUTATION PROCESSES INCLUDING ALL-TO-ALL COMMUNICATIONS (A2A) AMONG PLURALITY OF NODES (PROCESSORS) CONSTITUTING NETWORK

摘要

Optimally scheduling a plurality of computation processes including all-to-all communications (A2A) among a plurality of nodes (processors) constituting an n-dimensional (a torus or a mesh) network, The plurality of nodes (processors) constituting the network are divided into a communication (computation process) phase (A2A-L) required for all-to-all communications only among a plurality of nodes included in a first subgroup and a communication (computation process) phase (A2A-P) required for all-to-all communications only among a plurality of nodes included in a second subgroup to perform parallel processing with the phases overlapped with each other across a plurality of threads (thread 1, thread 2, thread 3, and thread 4). It is also possible to perform the parallel processing with respect to a plurality of computation processes such as a fast Fourier transform (FFT) and a transpose (T) (internal transpose).