On Mon, Jun 03, 2013 at 03:36:19PM +0200, Alexander Gordeev wrote: > On Mon, Jun 03, 2013 at 11:41:32AM +0200, Alexander Gordeev wrote: > > # ./tools/perf/perf stat -I 8 -a -e L1-dcache-load-misses:k sleep 1 > > > > Performance counter stats for process id '8': > > > > 0 L1-dcache-load-misses > > > > > > 1.001235781 seconds time elapsed > > > > # ./tools/perf/perf stat -I 8 -a -e L1-dcache-load-misses:k hwclock --test > > Mon 03 Jun 2013 04:42:59 AM EDT -0.891274 seconds > > > > Performance counter stats for process id '8': > > Oops, the most interesting part did not make it in. Very sorry :) Here: > > # ./tools/perf/perf stat -I 8 -a -e L1-dcache-load-misses:k hwclock --test > Mon 03 Jun 2013 09:32:49 AM EDT -0.719514 seconds > > Performance counter stats for process id '8': > > 447 L1-dcache-load-misses >
I think that is very much expected; except in the case where you spend _all_ your time in IRQ handlers, they'll pretty much always miss l1 cache. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
