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Newsgroups: comp.unix.bsd Path: sserve!manuel.anu.edu.au!munnari.oz.au!news.hawaii.edu!ames!agate!tfs.com!julian From: julian@tfs.com (Julian Elischer) Subject: IOZONE results (benchmarks in general) Message-ID: <1992Nov10.024031.9467@tfs.com> Organization: Trw Financial Systems Date: Tue, 10 Nov 1992 02:40:31 GMT Lines: 101 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