From: Andi Kleen <andi@firstfloor.org>
To: Manuel Selva <selva.manuel@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>, linux-perf-users@vger.kernel.org
Subject: Re: Understanding perf mem -t load results
Date: Tue, 24 Dec 2013 08:28:13 +0100 [thread overview]
Message-ID: <20131224072813.GI20765@two.firstfloor.org> (raw)
In-Reply-To: <52B93352.2030909@gmail.com>
On Tue, Dec 24, 2013 at 08:10:10AM +0100, Manuel Selva wrote:
> "You cannot use uncore events to sample IPs" means that the values
> corresponding to PERF_SAMPLE_IP are not correct ? Some benchmarks I
> did by sampling ME_INST_RETIRED with PERF_SAMPLE_IP let me think
> that I was able to get the source of th event. The IP value was
> coherent. Maybe this is not always the case.
It's the IP of a random core on the socket that happens to read the uncore
registers.
-Andi
next prev parent reply other threads:[~2013-12-24 7:28 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-12 14:06 Understanding perf mem -t load results Manuel Selva
2013-12-15 18:27 ` Manuel Selva
2013-12-15 21:18 ` Andi Kleen
2013-12-15 22:03 ` Manuel Selva
2013-12-15 23:45 ` Andi Kleen
2013-12-16 9:13 ` Manuel Selva
2013-12-20 9:38 ` Manuel Selva
2013-12-24 2:18 ` Andi Kleen
2013-12-24 7:10 ` Manuel Selva
2013-12-24 7:28 ` Andi Kleen [this message]
2013-12-24 7:42 ` Manuel Selva
2013-12-24 21:27 ` Andi Kleen
2013-12-25 10:25 ` Manuel Selva
2014-01-07 15:06 ` Manuel Selva
2014-01-07 21:27 ` Andi Kleen
2014-01-08 8:53 ` Manuel Selva
2014-01-08 9:50 ` Manuel Selva
2014-01-08 19:44 ` Andi Kleen
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