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From: Nikita Danilov <Nikita@Namesys.COM>
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Date: Wed, 18 Dec 2002 22:10:03 +0300
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To: Cliff White <cliffw@osdl.org>
Cc: Hans Reiser <reiser@namesys.com>, Andrew Morton <akpm@digeo.com>,
       Paolo Ciarrocchi <ciarrocchi@linuxmail.org>,
       linux-kernel@vger.kernel.org, Chris Mason <mason@suse.com>
Subject: Re: [Benchmark] AIM9 results 
In-Reply-To: <200212181847.gBIIlhO26530@mail.osdl.org>
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	<200212181847.gBIIlhO26530@mail.osdl.org>
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Cliff White writes:
 > > Andrew Morton wrote:
 > > 
 > > >Andrew Morton wrote:
 > > >  
 > > >
 > > >>Hans Reiser wrote:
 > > >>    
 > > >>
 > > >>>Andrew and Chris, are these changes in performance definitely due to VM
 > > >>>changes (and not some difference I am not thinking of between 2.5 and
 > > >>>2.4 reiserfs code)?
 > > >>>
 > > >>>      
 > > >>>
 > > >>aim9 is just doing
 > > >>
 > > >>        for (lots)
 > > >>                close(creat(filename))
 > > >>    
 > > >>
 > > >                  unlink(filename);	/* of course */
 > > >
 > > >
 > > >  
 > > >
 > > Oh, commercial fs vendors must really love tuning for this benchmark.... 
 > > sigh....
 > > 
 > Ya, we think the AIM stuff is getting a little old. The basic idea is fine, but
 > many of the tests do _very little work.  We (OSDL) would like to re-do 
 > AIM9+7 and make it more useful. We'd love to have some input from everyone....
 > For example, how big a file should we create for a real creat() test ?

Probably it should be variable. You may take a look at the way "mongo"
script (http://www.namesys.com/benchmarks/mongo.tar.gz) used to
benchmark reiserfs calculates size of file
(reiser_fract_tree.c:determine_size() function). Hmm, I remember putting
long comment for this function, but now it is gone...

 > cliffw
 > 
 > > Hans
 > > 

Nikita.
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