From: julian@tfs.com (Julian Elischer)
Subject: IOZONE results (benchmarks in general)
Organization: Trw Financial Systems
Date: Tue, 10 Nov 1992 02:40:31 GMT


Below are the results of an IOZONE auto.
they are from the same hardware, without rebooting.
they are from two different filesystems on the same disk.
One is an 8k filesystem (/usr on ref.tfs.com) and the other
is a 4kfilesystem (/usr/home on ref.tfs.com)

notice that one gives about twice the performance of the other.
notice also the effect of disk caching etc. on the figures for small
files.(especially writes).

This leads me to 2 conclusions:
if not all information is given, benchmarks are dangerous.

and

my driver is not as slow as eoahmad said it was 8-)

** 8k filesystem **
	IOZONE: Performance Test of Sequential File I/O  --  V1.14b (1/31/92)
		By Bill Norcott

	Operating System: POSIX 1003.1-1988

IOZONE: auto-test mode

	MB      reclen  bytes/sec written   bytes/sec read      
	1       512     1463129             1048576             
	1       1024    2330169             1014751             
	1       2048    3145728             1031386             
	1       4096    3700856             1014751             
	1       8192    4493897             1048576
	2       512     1553446             1039910             
	2       1024    918461              1031386             
	2       2048    1039910             1031386             
	2       4096    1075463             1006633             
	2       8192    1175973             1031386             
	4       512     921825              1018859             
	4       1024    908514              1035631             
	4       2048    939023              1035631             
	4       4096    928628              1039910             
	4       8192    873813              1018859             
	8       512     1066348             1044225             
	8       1024    1052963             1012709             
	8       2048    920140              1044225             
	8       4096    998644              1044225             
	8       8192    1035631             1027176              
	16      512     957786              1012709             

** 4k filesystem **

	IOZONE: Performance Test of Sequential File I/O  --  V1.14b (1/31/92)
		By Bill Norcott

	Operating System: POSIX 1003.1-1988

IOZONE: auto-test mode

	MB      reclen  bytes/sec written   bytes/sec read      
	1       512     542367              495390              
	1       1024    676501              528694              
	1       2048    723156              524288              
	1       4096    767251              495390              
	1       8192    740171              411206              
	2       512     491520              365782              
	2       1024    467766              447790              
	2       2048    491520              526482              
	2       4096    469512              503316              
	2       8192    457560              526482              
	4       512     430185              470389              
	4       1024    429451              425818              
	4       2048    438429              452623              
	4       4096    425098              508400              
	4       8192    428719              514639              
	8       512     417690              513588              
	8       1024    461758              510981              
	8       2048    470389              514639              
	8       4096    466898              486296              
	8       8192    430922              510463              
	16      512     421362              506865              


machime :
"Free technologies" 50MHz DX EISA motherboard. 16MB ram
Bustek 742a scsi adapter
386bsd 0.1
Seagate ST41651 SCSI disk drive.
4k filesystem tuning unknown
8k filesystem  tuned with tunefs for 1ms delay.

Note: this hardware runs a LITTLE faster (I think) under MACH 2.6
(same hardware.. results later maybe)
 MACH can get 2MB/sec to a ST42400 2GB drive and about 1.2MB/sec 
 to this drive.

+----------------------------------+       ______ _  __
|   __--_|\  Julian Elischer       |       \     U \/ / On assignment
|  /       \ julian@tfs.com        +------>x   USA    \ in a very strange
| (   OZ    ) 2118 Milvia st. Berkeley CA. \___   ___ | country !
+- X_.---._/  USA+(510) 704-3137(wk)           \_/   \\
	  v
Newsgroups: comp.unix.bsd