On Fri, 05 Dec 2008 00:07:16 -0800 (PST) David Miller <davem@xxxxxxxxxxxxx> wrote: > These things aren't measuring time, or even just cycles, they > are measuring things like L2 cache misses, cpu cycles, and > other similar kinds of events. > > So these counters are going to measure all of the damn crap > assosciated with doing the read() call as well as the real work > the task does. as you said before, not if you do the read() from a thread that's exempt from the profiling. -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
