linux-kernel - Re: [PATCH] getdelays: show average CPU/IO/SWAP/RECLAIM delays

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Message-Id: <20110509144202.163D.A69D9226@jp.fujitsu.com>
Date:	Mon,  9 May 2011 14:40:27 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Mel Gorman <mel@...ux.vnet.ibm.com>,
	Dave Young <hidave.darkstar@...il.com>,
	linux-mm <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Christoph Lameter <cl@...ux.com>,
	Dave Chinner <david@...morbit.com>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH] getdelays: show average CPU/IO/SWAP/RECLAIM delays

> I find it very handy to show the average delays in milliseconds.
> 
> Example output (on 100 concurrent dd reading sparse files):
> 
> 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=0, write=0, cancelled_write=0
> 
> CC: Mel Gorman <mel@...ux.vnet.ibm.com>
> Signed-off-by: Wu Fengguang <fengguang.wu@...el.com>
> ---
>  Documentation/accounting/getdelays.c |   33 +++++++++++++++----------
>  1 file changed, 20 insertions(+), 13 deletions(-)

Cool.
	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>




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