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    SubjectRe: [rfc 08/45] cpu alloc: x86 support
    On Mon, 19 Nov 2007, H. Peter Anvin wrote:

    > You're making the assumption here that NUMA = large number of CPUs. This
    > assumption is flat-out wrong.

    Well maybe. Usually one gets to NUMA because the hardware gets too big to
    be handleed the UMA way.

    > On x86-64, most two-socket systems are still NUMA, and I would expect that
    > most distro kernels probably compile in NUMA. However,
    > burning megabytes of memory on a two-socket dual-core system when we're
    > talking about tens of kilobytes used would be more than a wee bit insane.

    Yeah yea but the latencies are minimal making the NUMA logic too expensive
    for most loads ... If you put a NUMA kernel onto those then performance
    drops (I think someone measures 15-30%?)

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