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    SubjectRe: MAP_SHARED bizarrely slow
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    >>>>> "David" == David Gibson <david@gibson.dropbear.id.au> writes:

    David> http://www.ozlabs.org/people/dgibson/maptest.tar.gz

    David> On a number of machines I've tested - both ppc64 and x86 - the
    David> SHARED version is consistently and significantly (50-100%)
    David> slower than the PRIVATE version.

    Just gave it a test on my laptop and server. Both are p3. The
    laptop is under heavier mem pressure; the server has just under
    a gig with most free/cache/buff. Laptop is still running 2.6.7
    whereas the server is bk as of 2004-10-24.

    Buth took about 11 seconds for the private and around 30 seconds
    for the shared tests.

    So if this is a regression, it predates v2.6.7.

    -JimC
    --
    James H. Cloos, Jr. <cloos@jhcloos.com> <http://jhcloos.com>


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