Investigating Scenario-Conscious Asynchronous Rendezvous over RDMA

Zounmevo, Judicael A.; Afsahi, Ahmad

doi:10.1109/cluster.2011.65

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2014

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Cited by 2 publications

(2 citation statements)

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“…The literature is particularly abundant for communication/computation overlapping for two-sided communications [8,12,13,19]. In order to mitigate the synchronization effects, previous MPI onesided communication designs deferred the blocking steps to the epoch-closing routine [1,14].…”

Section: Related Workmentioning

confidence: 99%

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Intra-Epoch Message Scheduling To Exploit Unused or Residual Overlapping Potential

Zounmevo

Afsahi

2014

Proceedings of the 21st European MPI Users' Group Meeting

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As part of a new MPI Remote Memory Access (RMA) implementation over remote direct memory access, we propose a message scheduling scheme that interleaves inter-node and intra-node data transfers in a way that minimizes the overall latency of the RMA epoch. By doing so, we fulfill inter-node communication/intra-node communication overlapping and show that further latency mitigation is possible when computation length and communication payload sizes are too unbalanced to allow a satisfying level of communication/-computation overlapping. Test results show that the proposed scheduling scheme compares favorably against the approaches used in MVAPICH and Open MPI.

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Section: Related Workmentioning

confidence: 99%

“…Finally, by resorting to a dedicated thread, the overlapping issue is trivially solved. However, due to the risks of oversubscription or decreased parallelism, the thread dedication approach is usually not practical in MPI [2,19].…”

Section: Motivationmentioning

confidence: 99%