From: Andi Kleen <andi@firstfloor.org>
To: Adrien BAK <adrien.bak@metascale.org>
Cc: Vince Weaver <vincent.weaver@maine.edu>,
linux-perf-users@vger.kernel.org
Subject: Re: recording rapl/power events
Date: Tue, 22 Apr 2014 03:17:56 -0700 [thread overview]
Message-ID: <87ppk9brcb.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <5355D46A.4090209@metascale.org> (Adrien BAK's message of "Tue, 22 Apr 2014 11:31:06 +0900")
Adrien BAK <adrien.bak@metascale.org> writes:
>
> This looks promising, although I couldn't find any useful
> documentation on this. Do you know if the perf userland tool allows
> for this kind of slave-sampling or if I have to build my own tool
> around the perf_event API ?
perf record supports it (with :S), but none of the reporting tools
unfortunately.
However keep in mind that very rapid sampling of RAPL is not
likely to give useful results. The data only really makes
sense over longer intervals.
-Andi
--
ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2014-04-22 10:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-21 8:01 recording rapl/power events Adrien BAK
2014-04-21 14:07 ` Vince Weaver
2014-04-22 2:31 ` Adrien BAK
2014-04-22 10:17 ` Andi Kleen [this message]
2014-04-25 8:29 ` Namhyung Kim
2014-04-30 2:08 ` Adrien BAK
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