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Subject: Re: [BENCHMARK] 2.4.{18,19{-ck9},20rc1{-aa1}} with contest
From: Kjartan Maraas <kmaraas@online.no>
To: Jens Axboe <axboe@suse.de>
Cc: Con Kolivas <conman@kolivas.net>, Andrew Morton <akpm@digeo.com>,
       linux kernel mailing list <linux-kernel@vger.kernel.org>,
       marcelo@conectiva.com.br, Andrea Arcangeli <andrea@suse.de>
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l?r, 2002-11-09 kl. 14:54 skrev Jens Axboe:

[SNIP]

> The default is 2048. How long does the io_load test take, or rather how

The default on my RH system with the latest errata kernel is as follows:

[root@sevilla kmaraas]# elvtune /dev/hda

/dev/hda elevator ID		0
	read_latency:		8192
	write_latency:		16384
	max_bomb_segments:	6

[root@sevilla kmaraas]# uname -a
Linux sevilla.gnome.no 2.4.18-17.7.x #1 Tue Oct 8 13:33:14 EDT 2002 i686
unknown
[root@sevilla kmaraas]# 

Is this worth changing to lower values then? They seem to be an awful
lot higher than the values mentioned below here.

> many tests are appropriate to do? To get a good picture of how it looks
> you should probably try: 0, 8, 16, 64, 128, 512. Once you get some of
> these results, it will be easier to determine which area(s) would be
> most interesting to further explore.
> 
> There's also the write passover, I don't think it will have much impact
> on this test though.

Cheers
Kjartan

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