[lkml]   [2006]   [Nov]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    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

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2006-11-05 06:45    [W:0.018 / U:9.064 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site