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Summary: An Evaluation of the Myrinet/GM2 Two-Port Networks
Reza Zamani Ying Qian Ahmad Afsahi
Department of Electrical and Computer Engineering
Queen's University
Kingston, Canada K7L 3N6
{zamanir, qiany, ahmad}@ee.queensu.ca
Abstract
It is important to systematically assess the features and
performance of the new interconnects for high-
performance clusters. This paper presents the
performance of the two-port Myrinet networks at the GM2
and MPI layers using a complete set of microbenchmarks.
We also present the communication characteristics and
the performance of the NAS Multi-Zone benchmarks and
SMG2000 application under the MPI and MPI-OpenMP
programming paradigms.
We found that the host overhead is very small in our
cluster, and the Myrinet is sensitive to the buffer reuse
patterns. Our applications achieved a better performance
for MPI than the mixed-mode. All the applications studied
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