linux-kernel - Re: [PATCH 4/4] tracing, page-allocator: Add a postprocessing script for page-allocator-related ftrace events

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Message-ID: <4A71A3FD.6030802@redhat.com>
Date:	Thu, 30 Jul 2009 09:45:33 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mel@....ul.ie>
CC:	Larry Woodman <lwoodman@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: [PATCH 4/4] tracing, page-allocator: Add a postprocessing script
 for page-allocator-related ftrace events

Mel Gorman wrote:
> This patch adds a simple post-processing script for the page-allocator-related
> trace events. It can be used to give an indication of who the most
> allocator-intensive processes are and how often the zone lock was taken
> during the tracing period. Example output looks like
> 
> find-2840
>  o pages allocd            = 1877
>  o pages allocd under lock = 1817
>  o pages freed directly    = 9
>  o pcpu refills            = 1078
>  o migrate fallbacks       = 48
>    - fragmentation causing = 48
>      - severe              = 46
>      - moderate            = 2
>    - changed migratetype   = 7

I like it.

Acked-by: Rik van Riel <riel@...hat.com>

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