http://www.emsl.pnl.gov:2080/docs/global/ga.html Global Array Toolkit <abstract> The Global Array (GA) toolkit provides an efficient and portable "shared-memory" programming interface for distributed-memory computers. Each process in a MIMD parallel program can asynchronously access logical blocks of physically distributed matrices, without need for explicit cooperation by other processes. Unlike other shared-memory environments, the GA model exposes to the programmer the Non-Uniform Memory Access (NUMA) characteristics of the High Performance Computers and acknowledges that access to remote data is slower than to local data. Very efficient access to the local data is supported. <keywords>parallel processing tool <category>ppt-misc <description><url>ftp://ftp.pnl.gov/pub/global/Supercomputing94.ps.Z</url> <contact>Jarek Nieplocha / j_nieplocha@pnl.gov <environment> Distributed-memory message-passing MPP: IBM SP-1/2, Intel IPSC, Delta, Paragon, Cray-T3D. Network of Unix workstations. Shared memory NUMA MPP: KSR-1/2. Uni- and multi-processor workstations (shared memory): SUN, SGI (including new Power Challenge), IBM, DEC. </urc>