Title :
Shared memory NUMA programming on I-WAY
Author :
Nieplocha, J. ; Harrison, R.J.
Author_Institution :
Pacific Northwest Lab., Richland, WA, USA
Abstract :
The performance of the Global Array shared-memory non-uniform memory-access programming model is explored on the I-WAY, wide-area network distributed supercomputer environment. The Global Array model is extended by introducing a concept of mirrored arrays. Latencies and bandwidths for remote memory access are studied, and the performance of a large application from computational chemistry is evaluated using both fully distributed and also mirrored arrays. Excellent performance can be obtained with mirroring if even modest (0.5 MB/s) network bandwidth is available.
Keywords :
chemistry computing; data structures; parallel programming; shared memory systems; software performance evaluation; wide area networks; Global Array; I-WAY; application performance; bandwidths; computational chemistry; distributed supercomputer environment; latencies; mirrored arrays; remote memory access; shared memory NUMA programming; shared-memory nonuniform memory-access; wide-area network; Application software; Asynchronous transfer mode; Chemistry; Computer applications; Computer networks; Delay; Distributed computing; Programming profession; Supercomputers; Visualization;
Conference_Titel :
High Performance Distributed Computing, 1996., Proceedings of 5th IEEE International Symposium on
Conference_Location :
Syracuse, NY, USA
Print_ISBN :
0-8186-7582-9
DOI :
10.1109/HPDC.1996.546214
