Date: Mon, 26 May 2003 18:13:49 +0200 From: "=?iso-8859-15?Q?Jos=E9?= M. =?iso-8859-15?Q?Fandi=F1o?=" <freebsd@fadesa.es> To: stable@freebsd.org Subject: bad performance on ATA promise controllers Message-ID: <3ED23D3D.918F5C5@fadesa.es>
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Hello friends,
I'm having a problem with my home server (ASUS A7V133 motherboard) which has
a horrible performance with ATA disks connected to an integrated promise
controller.
Below you can see iozone results of the same disk connected to the primary/
secondary controller versus the promise one.
Promise ATA100 controller:
=========================
Version 1.02a ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
damocles 1G 7285 18 7235 3 5198 3 18830 58 19332 7 180.5 0
VIA 82C686 ATA100 controller:
============================
Version 1.02a ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
damocles 1G 24301 63 25047 11 13182 8 29843 85 30678 12 185.1 1
There is a big diference, 7MB/s connected in the promise and 24MB/s in the 686
and using UltraDMA-100 in both cases.
Transfers between ATA devices are even worse, certain combinations give me
transfer rates as low as 1MB/s :-?
I tried with other disks/ata cables and the results where identical.
If I boot GNU/Linux in the same machine all disks work as expected in
the promise controller, so this make me think that it's a specific problem
with FreeBSD.
Until now, I haven't had any luck searching in the mailing list archives
about this problem so I'm trying to asking here. Does anyone know where the
problem could be?
Thanks
** dmesg:
http://www.fadesa.es/misc/promise.txt
--
-----BEGIN GEEK CODE BLOCK-----
Version: 3.1
GCS/IT d- s+:+() a- C+++ UBL+++$ P+ L+++ E--- W++ N+ o++ K- w---
O+ M+ V- PS+ PE+ Y++ PGP+>+++ t+ 5 X+$ R- tv-- b+++ DI D++>+++
G++ e- h+(++) !r !z
------END GEEK CODE BLOCK------
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