Thanks again. I guess that by "how you configure perf" you are speaking about thred/cpu, kernel/user parameters ? For now I am monitoring one application only on a given node only and I am trying to setup things in order to get useful results independently of the overhead. I'll investigate overhead in a second time.
I can't use perf stat because I need to relate perf events with my application's code. Manu 2013/12/16 Andi Kleen <a...@firstfloor.org>: > On Sun, Dec 15, 2013 at 11:03:13PM +0100, Manuel Selva wrote: >> Thanks for the answer Andi. >> >> Is there any way (I couldn't find in the Intel documentation) to >> have an approximation of the "maximum" acceptable frequency ? > > It depends on how much overhead is acceptable and how you configure > perf (which affects the cost of the handler) and what the executed > code does. You could tune it to minimize throttles. > > I would start with something like 20003 > > If you only want the relative ratios of course using perf stat would > be better. > > -Andi > > -- > a...@linux.intel.com -- Speaking for myself only. > -- > To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-perf-users" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
