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    SubjectRE: [PATCH] slub Discard slab page only when node partials > minimum setting

    > > Hmmm... The sizes of the per cpu partial objects could be varied a bit to
    > > see if more would make an impact.
    > I find almost in one time my kbuilding.
    > size 384, was alloced in fastpath about 2900k times
    > size 176, was alloced in fastpath about 1900k times
    > size 192, was alloced in fastpath about 500k times
    > anon_vma, was alloced in fastpath about 560k times
    > size 72, was alloced in fastpath about 600k times
    > size 512, 256, 128, was alloced in fastpath about more than 100k for
    > each of them.
    > I may give you objects size involved in my netperf testing later.
    > and which test case do you prefer to? If I have, I may collection data
    > on them.

    I write a short script to collect different size object usage of
    alloc_fastpath. The output is following, first column is the object
    name and second is the alloc_fastpath called times.

    :t-0000448 62693419
    :t-0000384 1037746
    :at-0000104 191787
    :t-0000176 2051053
    anon_vma 953578
    :t-0000048 2108191
    :t-0008192 17858636
    :t-0004096 2307039
    :t-0002048 21601441
    :t-0001024 98409238
    :t-0000512 14896189
    :t-0000256 96731409
    :t-0000128 221045
    :t-0000064 149505
    :t-0000032 638431
    :t-0000192 263488

    Above output shows size 448/8192/2048/512/256 are used much.

    So at least both kbuild(with 4 jobs) and netperf loopback (one server on
    CPU socket 1, and one client on CPU socket 2) testing have no clear
    performance change on our machine

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      Last update: 2011-09-13 10:25    [W:0.048 / U:1.668 seconds]
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