On Sat, 16 Oct 2010 16:19:14 +0200 Eric Dumazet <eric.dumazet@xxxxxxxxx> wrote: > The current way to change a percpu_counter is to call > percpu_counter_add(), which is a bit expensive. > (More than 40 instructions, possible false sharing, ...) This is incorrect. With my compiler it's 25 instructions except in the very rare case where a batch overflow occurs. And more than half of that is function call entry/exit overhead. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
