An overview of the NYU Ultracomputer Project

The NYU Ultracomputer is a shared memory MIMD parallel computer design to con-tain thousands of processors connected by an Omega network to a like number of memory modules. A new coordination primitive fetch-and-add is defined and the net-work is enhanced to combine simultaneous requests, including fetch-and-adds, directed at the same memory location. The present report, an edited amalgam of papers I have coauthored with other members of the Ultracomputer project, discusses our work on ar-chitecture, programming models, system software, hardware and VLSI design, perfor-mance analysis, and simulation studies