linux-kernel - Re: [RFC][PATCH] the proposal of improve page reclaim by throttle

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Message-Id: <20080220185648.6447.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Wed, 20 Feb 2008 19:09:15 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	"minchan Kim" <barrioskmc@...il.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>,
	"Balbir Singh" <balbir@...ux.vnet.ibm.com>,
	"Rik van Riel" <riel@...hat.com>,
	"Lee Schermerhorn" <Lee.Schermerhorn@...com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] the proposal of improve page reclaim by throttle

Hi

> > >  * max parallel reclaim tasks:
> > >  *  max consumption time of
> > >         try_to_free_pages():
> >
> > sorry, I inserted debug code to my patch at that time.
> 
> Could you send me that debug code ?
> If you will send it to me, I will test it my environment (ARM-920T, Core2Duo).
> And I will report test result.

attached it.
but it is very messy ;-)

usage:
./benchloop.sh

sample output
=========================================================
max reclaim 2
Running with 120*40 (== 4800) tasks.
Time: 34.177
14.17user 284.38system 1:43.85elapsed 287%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (3813major+148922minor)pagefaults 0swaps
max prepare time: 4599 0
max reclaim time: 2350 5781
total
8271
max reclaimer
4
max overkill
62131
max saved overkill
9740


max reclaimer represent to max parallel reclaim tasks.
total represetnto max consumption time of try_to_free_pages().

Thanks


Download attachment "reclaim-throttle-3.patch" of type "application/octet-stream" (7106 bytes)

Download attachment "benchloop.sh" of type "application/octet-stream" (1515 bytes)