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- W2055058176 abstract "Formal modeling of the cost of MPI primitives allows a machine independent representation, comparison and performance analysis of their underlying algorithms. Current accepted methods are all the off-springs of LogP, conceived to model the cost of inter-node point-to-point messages in networks of single-processor machines. As new supercomputers are built upon cheap commodity boards with a growing number of cores accessing hierarchical memories, intra-node communication becomes progressively more relevant. Techniques for shared memory communication, such as message segmentation and collectives, not based on point-to-point operations, are substantively different from their inter-node counterparts. This paper unveils the reasons for the poor fit of LogGP and the most recent models in this domain, lognP and mlognP, and proposes a new model named τ-Lop, rooted on them, but addressing the challenge of accurately modeling shared memory MPI communications. Broadcast algorithms of mainstream MPI implementations, MPICH and Open MPI, are modeled and analyzed." @default.
- W2055058176 created "2016-06-24" @default.
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- W2055058176 date "2015-07-01" @default.
- W2055058176 modified "2023-09-27" @default.
- W2055058176 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si38.gif overflow=scroll><mml:mrow><mml:mi>τ</mml:mi></mml:mrow></mml:math>-Lop: Modeling performance of shared memory MPI" @default.
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- W2055058176 doi "https://doi.org/10.1016/j.parco.2015.02.006" @default.
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