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From: Satoru Moriya <satoru.moriya@hds.com>
Date: Wed, 4 May 2011 23:37:46 -0400
Subject: RE: [PATCH] getdelays: show average CPU/IO/SWAP/RECLAIM delays
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To: Wu Fengguang <fengguang.wu@intel.com>, Andrew Morton <akpm@linux-foundation.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Minchan Kim <minchan.kim@gmail.com>, Mel Gorman <mel@linux.vnet.ibm.com>, Dave Young <hidave.darkstar@gmail.com>, linux-mm <linux-mm@kvack.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Christoph Lameter <cl@linux.com>, Dave Chinner <david@fromorbit.com>, David Rientjes <rientjes@google.com>

On 05/02/2011 10:02 AM, Wu Fengguang wrote:=20
> I find it very handy to show the average delays in milliseconds.
>=20
> Example output (on 100 concurrent dd reading sparse files):
>=20
> CPU             count     real total  virtual total    delay total  delay=
 average
>                   986     3223509952     3207643301    38863410579       =
  39.415ms
> IO              count    delay total  delay average
>                     0              0              0ms
> SWAP            count    delay total  delay average
>                     0              0              0ms
> RECLAIM         count    delay total  delay average
>                  1059     5131834899              4ms
> dd: read=3D0, write=3D0, cancelled_write=3D0
>=20
> CC: Mel Gorman <mel@linux.vnet.ibm.com>
> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>

This is useful for me.

Reviewed-by: Satoru Moriya <satoru.moriya@hds.com>

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