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From: Namhyung Kim <namhyung@kernel.org>
To: Stephane Eranian <eranian@google.com>
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	mingo@elte.hu, ak@linux.intel.com, acme@redhat.com,
	jolsa@redhat.com, namhyung.kim@lge.com
Subject: Re: [PATCH 0/2] perf stat: add per processor socket count aggregation
Date: Thu, 07 Feb 2013 11:31:57 +0900	[thread overview]
Message-ID: <87fw18svky.fsf@sejong.aot.lge.com> (raw)
In-Reply-To: <1360161962-9675-1-git-send-email-eranian@google.com> (Stephane Eranian's message of "Wed, 6 Feb 2013 15:46:00 +0100")

Hi Stephane,

On Wed,  6 Feb 2013 15:46:00 +0100, Stephane Eranian wrote:
> This patch adds per-processor socket count aggregation
> for system-wide mode measurements. This is a useful
> mode to detect imbalance between sockets for uniform
> workloads.
>
> To enable this mode, use --aggr-socket in addition
> to -a. (system-wide). This mode can be combined with
> interval printing.
>
> The output includes the socket number and the number
> of online processors on that socket. This is useful
> to gauge the amount of aggregation.
>
>  # ./perf stat -I 1000 -a --aggr-socket -e cycles sleep 2
>  #           time socket cpus             counts events
>       1.000097680 S0        4          5,788,785 cycles
>       2.000379943 S0        4         27,361,546 cycles
>       2.001167808 S0        4            818,275 cycles

Can it be genericized to support arbitrary cpu topology like per-core,
per-numa-node or something?

Thanks,
Namhyung

  parent reply	other threads:[~2013-02-07  2:32 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-06 14:46 Stephane Eranian
2013-02-06 14:46 ` [PATCH 1/2] perf tools: add cpu_map processor socket level functions Stephane Eranian
2013-02-06 22:08   ` [tip:perf/core] perf tools: Add " tip-bot for Stephane Eranian
2013-02-06 14:46 ` [PATCH 2/2] perf stat: add per processor socket count aggregation Stephane Eranian
2013-02-06 19:51   ` Arnaldo Carvalho de Melo
2013-02-06 19:57     ` Stephane Eranian
2013-02-06 22:09   ` [tip:perf/core] perf stat: Add " tip-bot for Stephane Eranian
2013-02-07  2:31 ` Namhyung Kim [this message]
2013-02-07  7:35   ` [PATCH 0/2] perf stat: add " Stephane Eranian

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