From: Michael Buesch <fsdeveloper@yahoo.de>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
gardiol@libero.it
Subject: Re: [2.6] system is very slow during disk access
Date: Thu, 7 Aug 2003 01:10:16 +0200 [thread overview]
Message-ID: <200308070110.19660.fsdeveloper@yahoo.de> (raw)
In-Reply-To: <20030806155638.1fdd0a30.akpm@osdl.org>
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On Thursday 07 August 2003 00:56, Andrew Morton wrote:
> it does seem that ide has gone bad. Perhaps you can run `hdaprm -X udma2'
> or whatever the `-X' argument is to force it into UDMA2 mode.
>
> But the driver should have done that for itself.
I've done -X udma2 and it did a _massive_ performance drop.
root@lfs:/home/mb> hdparm -Tt /dev/hda
/dev/hda:
Timing buffer-cache reads: 128 MB in 0.31 seconds =417.00 MB/sec
Timing buffered disk reads: 64 MB in 3.24 seconds = 19.73 MB/sec
"Timing buffered disk reads" is only as half as fast as without udma2.
I've made a new profile with udma2 enabled and appended it.
The system-performance while dd is way better now, but still not as
good as in 2.4
But for what price? Now I have a disk-speed like DMA-33. :) (on a
DMA-100 controller)
- --
Regards Michael Buesch [ http://www.8ung.at/tuxsoft ]
Penguin on this machine: Linux 2.6.0-test2 - i386
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next prev parent reply other threads:[~2003-08-06 23:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-06 18:51 [2.6] system is very slow during disk access Michael Buesch
2003-08-06 19:29 ` Frank Van Damme
2003-08-06 19:31 ` Michael Buesch
2003-08-06 22:19 ` Willy Gardiol
2003-08-06 22:27 ` Michael Buesch
2003-08-06 19:29 ` Michael Buesch
2003-08-06 22:04 ` Andrew Morton
2003-08-06 22:44 ` Michael Buesch
2003-08-06 22:56 ` Andrew Morton
2003-08-06 23:10 ` Michael Buesch [this message]
2003-08-06 23:01 ` Bartlomiej Zolnierkiewicz
2003-08-06 23:16 ` Michael Buesch
2003-08-06 23:30 ` Bartlomiej Zolnierkiewicz
[not found] ` <200308062331.08020.insecure@mail.od.ua>
2003-08-06 20:47 ` Michael Buesch
2003-08-07 4:13 ` Nuno Silva
2003-08-07 9:53 ` Michael Buesch
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