linux-kernel - Re: [PATCH v3] perf mem: enable sampling loads and stores simultaneously

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Message-ID: <20141218045254.GC20215@sejong>
Date:	Thu, 18 Dec 2014 13:52:54 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	ak@...ux.intel.com, jolsa@...hat.com, acme@...hat.com,
	dsahern@...il.com, dzickus@...hat.com, rfowles@...hat.com,
	jmario@...hat.com
Subject: Re: [PATCH v3] perf mem: enable sampling loads and stores
 simultaneously

Hi Stephane,

On Wed, Dec 17, 2014 at 04:23:55PM +0100, Stephane Eranian wrote:
> 
> This patch modifies perf mem to default to sampling loads
> and stores simultaneously. It could only do one or the other
> before yet there was no hardware restriction preventing
> simultaneous collection. With this patch, one run is sufficient
> to collect both.
> 
> It is still possible to sample only loads or stores by using the
> -t option:
>  $ perf mem -t load rec
>  $ perf mem -t load rep
> Or
>  $ perf mem -t store rec
>  $ perf mem -t store rep
> 
> The perf report TUI will show one event at a time. The store
> output will contain a Weight column which will be empty.
> 
> In V2, we updated the man pages to reflect the change and
> also simplify the initialization of the argv vector passed
> to the cmd_*() functions as per LKML feedback.
> 
> In V3, we fixed typos in the changelog.
> 
> Signed-off-by: Stephane Eranian <eranian@...gle.com>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung
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