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2010
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Processor affinity and MPI performance on SMP-CMP clusters

9 years 6 months ago
Processor affinity and MPI performance on SMP-CMP clusters
Clusters of Symmetric MultiProcessing (SMP) nodes with multi-core Chip-Multiprocessors (CMP), also known as SMP-CMP clusters, are becoming ubiquitous today. For Message Passing interface (MPI) programs, such clusters have a multilayer hierarchical communication structure: the performance of intra-node communication is usually higher than that of internode communication; and the performance of intra-node communication is not uniform with communications between cores within a chip offering higher performance than communications between cores in different chips. As a result, the mapping from Message Passing Interface (MPI) processes to cores within each compute node, that is, processor affinity, may significantly affect the performance of intra-node communication, which in turn may impact the overall performance of MPI applications. In this work, we study the impacts of processor affinity on MPI performance in SMP-CMP clusters through extensive benchmarking and identify the conditions whe...
Chi Zhang, Xin Yuan, Ashok Srinivasan
Added 13 Feb 2011
Updated 13 Feb 2011
Type Journal
Year 2010
Where IPPS
Authors Chi Zhang, Xin Yuan, Ashok Srinivasan
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