*BSD News Article 42695


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From: bde@zeta.org.au (Bruce Evans)
Newsgroups: comp.unix.bsd
Subject: Re: Linux vs. BSD?!
Date: 21 Feb 1995 07:24:23 +1100
Organization: Kralizec Dialup Unix Sydney - +61-2-837-1183, v.32bis v.42bis
Lines: 21
Message-ID: <3iatpn$u4p@godzilla.zeta.org.au>
References: <3i7ar8$ahv@marton.hsr.no> <3iaaai$72u@agate.berkeley.edu> <3iab0s$hjl@ivory.lm.com> <3iabnv$i74@ivory.lm.com>
NNTP-Posting-Host: localhost.zeta.org.au

In article <3iabnv$i74@ivory.lm.com>,
Peter Berger <peterb@telerama.lm.com> wrote:
>>
>>These were run on identical hardware.  The benchmark is Dhrystone 2.1, 
>>which is more reliable than the 1.1 version I noticed others using as it
>>is less affected by secondary cache.
>>
>>Here's the table.  1,000,000 runs through Dhrystone in each case.
>>
>>Machine         OS                      One Ds (musec.)         Ds/sec
>>=======         ============            ===============         ======
>>Blindman        FreeBSD2.0-R            36.0                    27,790.6
>>Blindman        BSD/OS 1.1              27.9                    35,820.9
>>Blindman        NetBSD 1.0-R            27.8                    36,014.4

Dhrystone is probably misconfigured.  36.0 / 27.8 is 1.29 which is
strikingly close to the ratio of the CLK_TCK's in FreeBSD-2.0 and
NetBSD-1.0 (128.0 / 100.0).  Use a stopwatch to check the calibration
of Dhrystone.
-- 
Bruce Evans  bde@zeta.org.au