From: Jens Axboe <axboe@kernel.dk>
To: Tejun Heo <htejun@gmail.com>
Cc: Andrew Lyon <andrew.lyon@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: JMicron 20360/20363 AHCI Controller much slower with 2.6.18
Date: Thu, 21 Sep 2006 19:43:11 +0200 [thread overview]
Message-ID: <20060921174310.GK24362@kernel.dk> (raw)
In-Reply-To: <4512C54B.9060705@gmail.com>
On Fri, Sep 22 2006, Tejun Heo wrote:
> Andrew Lyon wrote:
> >Hi,
> >
> >I have a Gigabyte GA_965P_DS3 with Core 2 Duo CPU, wd raptor connected
> >to onboard JMicron 20360/20363 AHCI Controller, with 2.6.18 the drive
> >is very slow:
> >
> >beast ~ # uname -a
> >Linux beast 2.6.18 #1 SMP Wed Sep 20 15:04:24 BST 2006 i686 Intel(R)
> >Core(TM)2 C
> >PU 6600 @ 2.40GHz GNU/Linux
> >beast ~ # hdparm -t /dev/sda
> >
> >/dev/sda:
> >Timing buffered disk reads: 100 MB in 3.02 seconds = 33.10 MB/sec
>
> Which IO scheduler are you using? If you're using anticipatory or cfq,
> can you try deadline?
It would also be nice to have a way to turn NCQ off, btw, just to rule
that out as well.
--
Jens Axboe
prev parent reply other threads:[~2006-09-21 17:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-21 8:04 JMicron 20360/20363 AHCI Controller much slower with 2.6.18 Andrew Lyon
2006-09-21 17:00 ` Tejun Heo
2006-09-21 17:43 ` Jens Axboe [this message]
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