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> 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 -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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