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    SubjectRe: larger default page sizes...
    From: Christoph Lameter <>
    Date: Wed, 26 Mar 2008 10:56:17 -0700 (PDT)

    > One should emphasize that this test was a kernel compile which is not
    > a load that gains much from larger pages.

    Actually, ever since gcc went to a garbage collecting allocator, I've
    found it to be a TLB thrasher.

    It will repeatedly randomly walk over a GC pool of at least 8MB in
    size, which to fit fully in the TLB with 4K pages reaquires a TLB with
    2048 entries assuming gcc touches no other data which is of course a
    false assumption.

    For some compiles this GC pool is more than 100MB in size.

    GCC does not fit into any modern TLB using it's base page size.

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