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Date: Fri, 8 Jul 2005 12:20:56 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Jens Axboe <axboe@suse.de>
Cc: Linus Torvalds <torvalds@osdl.org>, Grant Coady <grant_lkml@dodo.com.au>,
       Ondrej Zary <linux@rainbow-software.org>,
       =?iso-8859-1?Q?Andr=E9?= Tomt <andre@tomt.net>,
       Al Boldi <a1426z@gawab.com>,
       "'Bartlomiej Zolnierkiewicz'" <bzolnier@gmail.com>,
       linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [git patches] IDE update
Message-ID: <20050708102056.GA7172@elte.hu>
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* Jens Axboe <axboe@suse.de> wrote:

> But! I used hdparm -t solely, 2.6 was always ~5% faster than 2.4. But 
> using -Tt slowed down the hd speed by about 30%. So it looks like some 
> scheduler interaction, perhaps the memory timing loops gets it marked 
> as batch or something?

to check whether that could be the case, could you try:

	nice -n -20 hdparm -t /dev/hdc

does that produce different results?

	Ingo