White Papers

A New DMA Registration Strategy for Pinning-Based High Performance Networks

Category: Data Management, Networking and Communications

Overview This paper proposes a new memory registration strategy for supporting Remote DMA (RDMA) operations over pinning-based networks, as existing approaches are insufficient for efficiently implementing Global Address Space (GAS) languages. Although existing approaches often maximize bandwidth, they require levels of synchronization that discourage one-sided communication, and can have significant latency costs for small messages. The proposed Firehose algorithm attempts to expose one-sided, zero-copy communication as a common case, while minimizing the number of host-level synchronizations required to support remote memory operations. The basic idea is to reap the performance benefits of a Pin-Everything approach in the common case (without the drawbacks) and revert to a Rendezvous-based approach to handle the uncommon case.

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Publisher: University of California
File Format: PDF
Date Published: Oct 22, 2008
Format: White Papers
Topics: High Performance Computing, Bandwidth Issues

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