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    SubjectRe: [Bug 350] New: i386 context switch very slow compared to 2.4 due to wrmsr (performance)
    [Hmm, this is becomming a FAQ]

    > Switching in and out of long mode is evil enough that I don't think it
    > is worth it. And encouraging people to write good JIT compiling

    Forget it. It is completely undefined in the architecture what happens
    then. You'll lose interrupts and everything. Nothing for an operating
    system intended to be stable.

    I have no plans at all to even think about it for Linux/x86-64.

    > emulators sounds much better, especially in the long run. But it can
    > be written.

    For DOS even a slow emulator should be good enough. After all most
    DOS Programs are written for slow machines. Bochs running on a K8
    will be hopefully fast enough. If not an JIT can be written, perhaps
    you can extend valgrind for it.

    Or if you really rely on a DOS program executing fast you can
    always boot a 32bit kernel which of course still supports vm86
    in legacy mode.

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      Last update: 2005-03-22 13:33    [W:0.018 / U:24.528 seconds]
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