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From: Andrew Morton <andrewm@uow.edu.au>
To: Tom Sightler <ttsig@tuxyturvy.com>
Cc: "Gord R. Lamb" <glamb@lcis.dyndns.org>, linux-kernel@vger.kernel.org
Subject: Re: Samba performance / zero-copy network I/O
Date: Sat, 17 Feb 2001 01:51:14 +1100	[thread overview]
Message-ID: <3A8D3E62.98F5AD6A@uow.edu.au> (raw)
In-Reply-To: <Pine.LNX.4.32.0102141548440.27843-100000@localhost.localdomain>, <Pine.LNX.4.32.0102141548440.27843-100000@localhost.localdomain> <982190431.3a8b095f4b3c4@eargle.com>

Tom Sightler wrote:
> 
> My testing showed that the lowlatency patches abosolutely destroy a system
> thoughput under heavy disk IO.

I'm surprised - I've been keeping an eye on that.

Here's the result of a bunch of back-to-back `dbench 12' runs
on UP, alternating with and without LL:

With:
	58.725 total
	52.217 total
	51.935 total
	53.624 total
	39.815 total

Without:
	1:16.85 total
	52.525 total
	57.602 total
	41.623 total
	58.848 total

Results on reiserfs are similar.

-

  parent reply	other threads:[~2001-02-16 14:42 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-02-14 20:14 Gord R. Lamb
2001-02-14 20:29 ` Alan Cox
2001-02-14 20:42 ` Jeremy Jackson
2001-02-14 20:53   ` Gord R. Lamb
2001-02-14 22:40     ` Tom Sightler
2001-02-16  2:24       ` Gord R. Lamb
2001-02-16 14:51       ` Andrew Morton [this message]
2001-02-16 20:49         ` Tom Sightler
2001-02-17  8:17     ` Anton Blanchard
2001-02-19 16:47       ` Gord R. Lamb

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