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    SubjectRe: [rfc patch] i386: don't save eflags on task switch

    > For me, when compiled with -O2, it results in
    > 84
    > 88
    > 132
    > which basically says: a "rdtsc->rdtsc" is 84 cycles, putting a "pushfl" in
    > between is another _4_ cycles, and putting a "popfl" in between is about
    > another 48 cycles.

    This means we should definitely change restore_flags() to only STI,
    never popf

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      Last update: 2006-11-05 06:45    [W:0.029 / U:9.012 seconds]
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