From: Andrew Smith <asmith@vtrl.co.uk>
To: linux-kernel@vger.kernel.org
Subject: kernel performance problem
Date: Sun, 11 Sep 2005 00:51:13 +0100 [thread overview]
Message-ID: <43237171.2080203@vtrl.co.uk> (raw)
This is my first ever posting to this list, so please excuse me if I've
f**cked up and broken protocol.
I use an IDE LG DVD-RW drive for backup(GSA-4081B).
Back around 2.6.10 it wrote at typically 1.6-1.7x speed, but thereafter
it dropped to around 0.6-0.7 x.
%hdparm -I /dev/hdd
/dev/hdd:
ATAPI CD-ROM, with removable media
Model Number: HL-DT-ST DVDRAM GSA-4081B
Serial Number: K2B3CFE4600
Firmware Revision: A100
Standards:
Likely used CD-ROM ATAPI-1
Configuration:
DRQ response: 50us.
Packet size: 12 bytes
Capabilities:
LBA, IORDY(can be disabled)
DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
HW reset results:
CBLID- below Vih
Device num = 1
--
Andrew
next reply other threads:[~2005-09-10 23:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-10 23:51 Andrew Smith [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-09-11 12:29 kernel performance problem Walt H
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