linux-kernel - Re: [PATCH 1/1] fat: improve sync performance by grouping writes revised

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Date:	Wed, 01 Nov 2006 05:23:58 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	"Holden Karau" <holden@...scanfly.ca>
Cc:	"Holden Karau" <holdenk@...dros.com>,
	"Josef Sipek" <jsipek@....cs.sunysb.edu>,
	linux-kernel@...r.kernel.org, "akpm\@osdl.org" <akpm@...l.org>,
	linux-fsdevel@...r.kernel.org,
	"Nick Piggin" <nickpiggin@...oo.com.au>,
	Jörn Engel <joern@...nheim.fh-wedel.de>
Subject: Re: [PATCH 1/1] fat: improve sync performance by grouping writes revised

"Holden Karau" <holden@...scanfly.ca> writes:

> The performance increase is pretty small. Using an old external dirve
> I had lying around I got:
> diff -y stock/10k modified/10k
> 10240+0 records in                                            | 1024+0
> records in
> 10240+0 records out                                           | 1024+0
> records out
> 5242880 bytes transferred in 18.280922 seconds (286795 bytes/ | 524288
> bytes transferred in 1.824985 seconds (287283 bytes/se

1024 records out 1.824985 seconds. Is there decrease case?  I assume
the result is same. So, we would need different approach.

> diff -y stock/1k modified/1k
> 1024+0 records in                                               1024+0
> records in
> 1024+0 records out                                              1024+0
> records out
> 524288 bytes transferred in 1.777250 seconds (295000 bytes/se | 524288
> bytes transferred in 1.764748 seconds (297089 bytes/se
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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