Abstract
The paper presents a new method for efficient fine grain computations on distributed memory computers. RDMA (Remote Direct Memory Access) communication is applied which assures direct access to memories of remote processing nodes. To obtain high RDMA efficiency for fine-grain computations with very frequent transmissions of small size messages, a specially designed structure of RDMA rotating buffers (RB) is introduced. It allows to fully exploit available communication bandwidth by provision of a special communication control infrastructure prepared and activated in a program before effective computations start. As an example of a fine-grain problem implemented with the RDMA rotating buffers, the discrete Fast Fourier Transform (FFT) execution is presented. “The binary-exchange algorithm” of FFT is examined showing efficiency of the RB method in comparison to standard MPI communication.
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Smyk, A., Tudruj, M. (2004). RDMA Communication Based on Rotating Buffers for Efficient Parallel Fine-Grain Computations. In: Wyrzykowski, R., Dongarra, J., Paprzycki, M., Waśniewski, J. (eds) Parallel Processing and Applied Mathematics. PPAM 2003. Lecture Notes in Computer Science, vol 3019. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-24669-5_7
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DOI: https://doi.org/10.1007/978-3-540-24669-5_7
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-21946-0
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