Abstract
The message passing interface (MPI) standard [11, 12] provides new opportunities for developing high performance parallel and distributed applications. A very important goal of MPI is to provide a widely portable and efficient programming library without sacrificing performance. In this paper, we evaluate the performance of MPI communications on three platforms: Gray-research T3D, Meiko, and a network of workstations (NOW). Each machine is viewed as a "black box" that supports the same MPI implementation. Detailed measurements of the differences in communication performance among the platforms are presented. Our objective in this is to compare the performance of MPI communication on several platforms.