Low performance of SpMV on Xeon Phi

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This topic contains 1 reply, has 2 voices, and was last updated by  nico 10 months, 2 weeks ago.

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  • #1463

    daniel.langr
    Member

    I run the “benchmark” test for some large matrices from the UFSMC using Intel MIC (KNC) and the reported performance was quite small, appros. between 1.5 and 2.2 GFLOP/s for the CSR format (not higher for other formats). With Intel MKL and the same matrices, I got performance between 4 and 22 GFLOP/s, which is much higher.

    Any thoughts why Paralution performs so poorly on Xeon Phi?

    #1465

    nico
    Participant

    Hi Daniel,

    our current MIC implementation is not very optimized and therefore not optimal. You should make sure that MKL is enabled during the compilation process. Unfortunately, due to very few MIC users, we have currently no plans to further improve the MIC kernels.

    Best
    Nico

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