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From: mac@gold.kpc.com (Mike McNamara)
Newsgroups: comp.benchmarks
Subject: Here is a tiny OS benchmark
Message-ID: <MAC.91Apr15161150@gold.kpc.com>
Date: 15 Apr 91 23:11:50 GMT
Sender: uucp@kpc.com (UNIX-to-UNIX Copy)
Reply-To: mac@kpc.com
Organization: Kubota Pacific Computer Incoporated, Sanata Clara, CA
Lines: 91
Nntp-Posting-Host: gold


	The following is motivated by laments heard at ASPLOS
concerning the derth of useful OS benchmarks.  This benchmarks suffers
from all the usual aliments:

	It generates a single figure of merit;
	It is suspectable to point optimizations of the target
machine;
	It gives different results when run in single user mode versus
when run at 3 pm the day before tapeout;
	It assumes you are running a UNIX on a machine with /bin/csh;
	It probably does not model your application real well;
	It probably isn't real useful ;-)

	However, it tests interesting things: How often can the system
create, run, and exit a simple program, like /bin/date ?

#!/bin/csh
set i = 0
set count = 500
set host = `/bin/hostname`
echo " The Date Per Second Benchmark "
echo " ----------------------------- "
echo " Timing $count /bin/dates..."
onintr die
## if you have a modern date...
#set k = `date '+%H %M %S' `
#set hours = $k[1]
#set minutes = $k[2]
#set seconds = $k[3]
# else
set k = `date | sed -e 's/:/ /g'`
set hours = $k[4]
set minutes = $k[5]
set seconds = $k[6]
# endif
set start = 0
@ start = $hours * 3600 + $minutes * 60 + $seconds
echo "Start time is $start ..."
while ( $i < $count )
	/bin/date > /dev/null
	@ i = $i + 1
end
die:
## if you have a modern date...
# set k = `date '+%H %M %S' `
#set hours = $k[1]
#set minutes = $k[2]
#set seconds = $k[3]
# else
set k = `date | sed -e 's/:/ /g'`
set hours = $k[4]
set minutes = $k[5]
set seconds = $k[6]
# endif
set finish = 0
@ finish = $hours * 3600 + $minutes * 60 + $seconds
echo ...End time is $finish
set delta = 0
@ delta = $finish  - $start
echo $i dates in $delta seconds:
set dps = `echo " $i / $delta  " | bc `
echo
echo The machine \"${host}\" executes $dps dates per second


	Just to start things off, the machine on my desk runs:
mac@mack 25 % ./dps
 The Date Per Second Benchmark
 -----------------------------
 Timing 500 /bin/dates...
Start time is 57001 ...
...End time is 57020
500 dates in 19 seconds:
The machine "mack" executes 26 dates per second
mac@mack 26 %

My machine is a 33MHz R3000 with a 33MHz bus.

Machine		OS	DPS	Load
Sun 3/50	4.0	3	Unloaded
Sun 3/280	4.1.1	6	Normal fileserver load
Stardent 30xx	4.0	12	Unloaded
My machine	--	26	Unloaded

How does your machine compare?
--
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