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Date: Sun, 19 Mar 1995 20:56:58 +0100
From: "Christoph P. Kukulies" <kuku@gilberto.physik.rwth-aachen.de>
Message-Id: <199503191956.UAA29420@gilberto.physik.rwth-aachen.de>
To: freebsd-current@freefall.cdrom.com
Subject: -current disk performance better
Sender: current-owner@FreeBSD.org
Precedence: bulk

Here are two data points from kernels before and after the 'big slow down':

before:

Writing the 25 Megabyte file, 'iozone.tmp'...11.398438 seconds
Reading the file...9.406250 seconds

IOZONE performance measurements:
        2299823 bytes/second for writing the file
        2786912 bytes/second for reading the file
jazz: {127} 
jazz: {127} uname -a
FreeBSD jazz 2.1.0-Development FreeBSD 2.1.0-Development #1: Mon Mar  6
18:06:23 MET 1995     root@jazz:/usr/src/sys/compile/JAZZ  i386
jazz: {128} 

after:

Writing the 25 Megabyte file, 'iozone.tmp'...11.140625 seconds
Reading the file...8.914062 seconds

IOZONE performance measurements:
        2353045 bytes/second for writing the file
        2940791 bytes/second for reading the file
jazz: {3} 
FreeBSD jazz 2.1.0-Development FreeBSD 2.1.0-Development #0: Sun Mar 19
20:46:29 MET 1995     kuku@jazz:/usr/src/sys/compile/JAZZGUS  i386

DX4/100 and ASUS SP3G board.


--Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de
FreeBSD blues 2.1.0-Development FreeBSD 2.1.0-Development #0: Sun Mar 19
17:20:44  1995     root@blues:/usr/src/sys/compile/BLUESGUS  i386