From: Manuel Selva <manuel.selva@insa-lyon.fr>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: Understanding perf mem -t load results
Date: Sun, 15 Dec 2013 23:03:13 +0100 [thread overview]
Message-ID: <52AE2721.8020501@insa-lyon.fr> (raw)
In-Reply-To: <877gb5vmmn.fsf@tassilo.jf.intel.com>
Thanks for the answer Andi.
Is there any way (I couldn't find in the Intel documentation) to have an
approximation of the "maximum" acceptable frequency ?
Manu
On 12/15/2013 10:18 PM, Andi Kleen wrote:
> Manuel Selva <manuel.selva@insa-lyon.fr> writes:
>>
>> perf mem -t load rec -c 1 make -j18
>
> With -c1 on such a frequent event you will not sample much, but just
> throttle a lot, as the PMI handler would use too much time.
> Your numbers are likely garbage.
>
> -Andi
>
next prev parent reply other threads:[~2013-12-15 22:03 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 [this message]
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
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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