MOREAUD, Stéphanie; GOGLIN, Brice

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MOREAUD, Stéphanie
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]

GOGLIN, Brice
Laboratoire Bordelais de Recherche en Informatique [LaBRI]
Efficient runtime systems for parallel architectures [RUNTIME]

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Communication dans un congrès

Ce document a été publié dans

PDCS, 2007-11-19, Cambridge. 2007

Résumé en anglais

The ever-growing level of parallelism within the multi-core and multi-processor nodes in clusters leads to the generalization of distributed memory banks and busses with non-uniform access costs. These NUMA effects have been mostly studied in the context of threads scheduling and are known to have an influence on high-performance networking in clusters. We present an evaluation of their impact on communication performance in multi-Opteron machines. NUMA effects exhibit a strong and asymmetric impact on high-bandwidth communications while the impact on latency remains low. We then describe the implementation of an automatic NUMA-aware placement strategy which achieves as good communication performance as a careful manual placement, and thus ensures performance portability by gathering hardware topology information and placing communicating tasks accordingly.< Réduire

Mots clés en anglais

High-Speed Networks

NUMA

Opteron

Hypertransport

Placement

Performance

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Impact of NUMA Effects on High-Speed Networking with Multi-Opteron Machines

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Résumé en anglais

Mots clés en anglais

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