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    SubjectRe: 2.2.18Pre Lan Performance Rocks!
    On Mon, Oct 30, 2000 at 11:50:24AM +0100, Ingo Molnar wrote:
    > On Mon, 30 Oct 2000, Jeff V. Merkey wrote:
    > > ds: and es: are both used in copy-to-user and copy-from-user and they
    > > get reloaded.
    > And they all share the same segment descriptor. Whats your point? ES is
    > the default target segment for string operations. DS is the default data
    > segment. Have you ever profiled how many cycles it takes to do a "mov
    > __KERNEL_DS, %es" in entry.S, before making your (ridiculous) claim? I
    > have.

    No. I used a hardware analyzer to show me how many LOCK# assertions it does
    invisible to your software tools underneath. Try using EMON to profile,
    it gives hardware numbers and let's you watch the cache controllers
    issue non-cacheable memory references to fetch the descriptors.


    > Ingo
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