*BSD News Article 33526


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From: andreas@knobel.knirsch.de (Andreas Klemm)
Newsgroups: comp.os.386bsd.bugs
Subject: Re: FreeBSD 1.1.5.1 now benchmarks much slower...
Date: 30 Jul 1994 12:58:33 GMT
Organization: $HOME, D-41469 Neuss
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Message-ID: <31dipp$o1@knobel.knirsch.de>
References: <MARK.1055.2E347ECA@ardsley.business.uwo.ca> <CtJwMv.5C1@veda.is>
NNTP-Posting-Host: knobel.knirsch.de
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Adam David (adam@veda.is) wrote:
: MARK@ardsley.business.uwo.ca (Mark_Bramwell) writes:

: >The dhrystone benchmark is showing 1/2 the speed of what it was last week.

: You have to recompile dhrystone because the value of CLK_TCK changed.

I made some benchmarks with the new 1.1.5.1 release 

dhrystone 1.1
dhrystone 2.1
ssba suite
bonnie 
iozone

Disk performance is better (scsi). Other things are about the same.
ssba computed the HZ value to 128. With that HZ value you get reasonable
results.

When doing benchmarks like dhrystone you have to use the correct
HZ value. In former BSd releases this was the typical value of 60
for BSD systems.
As I heard from Joerg Wunsch the BSD team had to implement timer
with a better resolution because of implementing better sound card
support (I think).
This results in strange "results" when doing benchmarks ...
Watch the HZ value closely when the times(2) function is being used !

Regards

	Andreas ///


--
Andreas Klemm                 /\/\____ Wiechers & Partner Datentechnik GmbH 
andreas@knobel.knirsch.de ___/\/\/     andreas@wupmon.wup.de (Unix Support)