Messages in this thread | | | Date | Mon, 22 Oct 2012 12:02:48 +0100 | From | Pádraig Brady <> | Subject | Re: [Perf] Adding timeout option |
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On 10/21/2012 05:18 AM, abhishek agarwal wrote:
> perfmon had "timeout" option and i guess, same do oprofile. > > On Sat, Oct 20, 2012 at 1:58 AM, Pádraig Brady <P@draigbrady.com> wrote: >> On 10/13/2012 08:54 AM, abhishek agarwal wrote: >>> >>> Hi folks.. >>> >>> I was thinking that why cant we have a timeout option in perf stat >>> command. The timeout feature will help us to profile a process for a >>> stipulated time (preferably in millisecs) and make perf stat return >>> after that time. >>> Eg: >>> >>> perf stat --timeout=10 sleep 100 >>> >>> This will make perf return and report stats after 10 ms... >>> >>> Hope anyone can shed some more light on the idea >> >> >> It seems preferable to use the timeout program to do this. >> Either sending a handled signal to the perf process like: >> >> timeout -s HUP 10 perf stat sleep 100 >> >> Or even better, just use that to kill the monitored process itself >> >> perf stat timeout 10 sleep 100
> sleep does not offer a good timeout resolution and it is not a good > option (according to me) either.
sleep was just following on the command example. timeout(1) supports subsecond resolution, through timer_create (CLOCK_REALTIME...) and timeout indication through signals.
thanks, Pádraig. -- 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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