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 22:27:28 +0100 [thread overview]
Message-ID: <20131224212728.GK20765@two.firstfloor.org> (raw)
In-Reply-To: <52B93B01.4020305@gmail.com>
> I checked what can be measured with the offcore facility. I can ask
> to count remote memory accesses, but now I am not sure PEBS is
> enable for these events. If the answer is no, I can't accurately
> identify remote memory accesses with offcore events ? As a
> consequence I am wondering if there is a way to do such thing ?
The OFFCORE events are not PEBS enabled. However the memory PEBS
events report the same information (with some limitations) in
the PEBS record (and perf reports this information)
In general you cannot accurately profile all memory accesses.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2013-12-24 21:27 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
2013-12-24 7:42 ` Manuel Selva
2013-12-24 21:27 ` Andi Kleen [this message]
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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