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    SubjectRe: CONUNDRUM.


    On Wed, 12 Feb 1997, Ingo Molnar wrote:

    >
    > > One binary code executes under MSDOS 17% faster(!) than
    > > under Linux. Why? How to get this loss back? I was dazed&confused.
    >
    > one thing: it uses ALOT of floating point. And you say this happens:
    >
    > [irqs off]
    > [timestamp1]
    >
    > <ALOT of computing, only from memory, into memory, using CPU and FPU>
    >
    > [timestamp2]
    > [irqs on]
    >
    > and delta := timestamp2-timestamp1, and you say delta(DOS) is 17% better
    > than delta(Linux) ?
    >
    > all code has the same alignment? And it's only this code that is
    > executing? And you say TLB cache isnt trashing?

    1) Do you have the pentium optimized memcpy installed?
    2) Does your system clock keep time properly in both environments?

    Y.


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