linux-kernel - Re: [Perf] Adding timeout option

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Date:	Sun, 21 Oct 2012 09:48:09 +0530
From:	abhishek agarwal <abhigem.126@...il.com>
To:	Pádraig Brady <P@...igbrady.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [Perf] Adding timeout option

sleep does not offer a good timeout resolution and it is not a good
option (according to me) either.
perfmon had "timeout" option and i guess, same do oprofile.

On Sat, Oct 20, 2012 at 1:58 AM, Pádraig Brady <P@...igbrady.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
>
> cheers,
> Pádraig.
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