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From: "Felipe Alfaro Solana" <felipe_alfaro@linuxmail.org>
To: akpm@digeo.com, "Felipe Alfaro Solana" <felipe_alfaro@linuxmail.org>
Cc: linux-kernel@vger.kernel.org
Date: Sat, 01 Mar 2003 00:12:20 +0100
Subject: Re: anticipatory scheduling questions
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----- Original Message ----- 
From: Andrew Morton <akpm@digeo.com> 
Date: Fri, 28 Feb 2003 11:14:18 -0800 
To: "Felipe Alfaro Solana" <felipe_alfaro@linuxmail.org> 
Subject: Re: anticipatory scheduling questions 
 
> "Felipe Alfaro Solana" <felipe_alfaro@linuxmail.org> wrote: 
> > I have done so: Evolution is a complex application with many interdependencies and is  
> > not very prone to launch diagnostic messages to the console. Anyways, I haven't seen  
> > any diagnostic message in the console. I still think there is something in the AS I/O scheduler  
> > that is not working at full read throughput. Of course I'm no expert.  
>  
> It certainly does appear that way.  But you observed the same runtime 
> with the deadline scheduler.  Or was that a typo? 
>  
> > > 2.4.20-2.54 -> 9s   
> > > 2.5.63-mm1 w/Deadline -> 34s   
> > > 2.5.63-mm1 w/AS -> 33s  
 
It wasn't a typo... In fact, both deadline and AS give roughly the same timings (one second up or down). But I 
still don't understand why 2.5 is performing so much worse than 2.4. Could a "vmstat" or "iostat" dump be 
interesting? 
-- 
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