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From: zxmgv07@hp12.zdv.uni-tuebingen.de (Will)
Newsgroups: comp.periphs.scsi,comp.os.linux.hardware,comp.os.linux.setup,comp.unix.bsd.freebsd.misc
Subject: Re: SCSI diskIO
Followup-To: comp.periphs.scsi,comp.os.linux.hardware,comp.os.linux.setup,comp.unix.bsd.freebsd.misc
Date: 4 Sep 1995 21:44:58 GMT
Organization: InterNetNews at ZDV Uni-Tuebingen
Lines: 27
Message-ID: <42fs0r$j3s@newsserv.zdv.uni-tuebingen.de>
References: <417ee7$1kp@trauma.rn.com> <DDs7pM.KLA@ritz.mordor.com> <41g8re$11e@news.cloud9.net> <41hqvn$a1p@bonnie.tcd-dresden.de> <41jl81$3d8@news.cloud9.net>
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Hi,
I tried Bonnie benchmarks on my machine desaster, and found someone else
who did this with exactly the same SCSI Drive ST31200, but using NCR
controller instead of the DPT PM2024/A on FreeBSD. The NCR is supposed
to be slower rather than faster.
The results are shocking - FreeBSD is way faster in every field except single
character operation. It does use more CPU time, too ?
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
desaster 100 1398 39.9 1599 14.4 605 9.7 1368 46.0 1816 19.9 42.2 3.8
ST31200 100 1353 99.0 3675 48.8 1454 22.6 1377 98.4 4007 37.4 63.9 7.4
Atls2G 100 1372 97.7 5856 91.4 2420 53.8 1434 98.5 6152 82.8 85.9 15.8
P90 100 3077 96.9 6193 56.2 2445 31.7 3374 96.7 6377 52.4 78.0 7.1
desaster Pentium/90,Seagate ST31200N, 1GB, 5400RPM, Linux 1.3.22, DPT PM2024A
ST31200 486DX2/66, Seagate ST31200N, 1GB, 5400RPM, FreeBSD-2.0, NCR
Atls2G 486DX2/66, Quantum Atlas 2150, 2GB, 7200RPM, FreeBSD-2.0, NCR
P90 Pentium/90, Quantum Atlas 1070, 1GB, 7200RPM, FreeBSD-2.0, NCR
Why is Linux 1.3.22 so slow compared to FreeBSD?
Cheers, Michael Will