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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
References: <1360161962-9675-1-git-send-email-eranian@google.com>
Date: Thu, 07 Feb 2013 11:31:57 +0900
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")
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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