Intel® Math Kernel Library

MKL DSS results change in 17.0.1

I have upgraded from Intel Parallel Studio 15.0 to 17.0 Update 1 and am noticing that MKL DSS (aka PARDISO) is giving somewhat different results when solving large real, symmetric sparse matrices. Is this a known issue? I am seeing the differences on both Windows and Linux. For example, has the reordering strategy changed or something like that?

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  • Pardiso thread, vs. core, usage

    I'm wondering if it's possible to run Pardiso on more than one thread per core on linux, or if certain behind-the-scenes optimisations have been set. That is, with the following env:

    p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo}
    span.s1 {font-variant-ligatures: no-common-ligatures}

    $ env | grep PARDISO

    MKL_DOMAIN_NUM_THREADS=MKL_DOMAIN_PARDISO=56

     

    And with the following hardware configuration, per (excerpted) /proc/cpuinfo:

     

    processor   : 55

    vendor_id   : GenuineIntel

    cpu family  : 6

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