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Date:      Mon, 15 Sep 97 09:53:05 +0700
From:      tm@blom.co.id
To:        toor@dyson.iquest.net
Cc:        current@FreeBSD.ORG
Subject:   FYI: Interesting IDE-Ultra/33 results
Message-ID:  <H00001440015d830@MHS>
In-Reply-To: <199709141627.LAA00166@dyson.iquest.net>

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> 	64      512     10475529            24612993            
> 	64      1024    10412041            39584952            
> 	64      2048    10250518            56886984            
> 	64      4096    10361802            68719476            
> 	64      8192    10299681            78090314            
> 	64      16384   10336864            85048857            
> 	64      32768   10238301            88556026            
> 	64      65536   10324440            89478485            
> 	128     512     10141599            10494727            
> 	128     1024    10330648            10494727            
> 	128     2048    10268899            10481921            
> 	128     4096    10207884            10559231            
> 	128     8192    10165603            10552745            
> 	128     16384   10159591            10559231            
> 	128     32768   10129639            10552745            
> 	128     65536   10189720            10598315            

How much memory have you got in this machine? Or rather, 
what is the size of the filesystem cache? Numbers like 
89MB/sec reads only tells me that you are testing FreeBSD 
filesystem cache performance rather than disk speed.

I've never studied what FreeBSD does write (and I don't 
have any FreeBSD systems available at the moment to study it
on). How aggressively are they cached? 

Terje Marthinussen
tm@blom.co.id



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