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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!crsp!pesnta!pertec!scgvaxd!kvc
From: kvc@scgvaxd.UUCP (Kevin Carosso)
Newsgroups: net.arch
Subject: Re: OS info request
Message-ID: <248@scgvaxd.UUCP>
Date: Mon, 21-Jan-85 21:58:14 EST
Article-I.D.: scgvaxd.248
Posted: Mon Jan 21 21:58:14 1985
Date-Received: Wed, 23-Jan-85 07:01:16 EST
References: <105@endot.UUCP> <1399@uscvax.UUCP>
Reply-To: kvc@scgvaxd.UUCP (Kevin Carosso)
Organization: Hughes Aircraft Co., El Segundo, CA
Lines: 28
Summary: 

In article <1399@uscvax.UUCP> tli@uscvax.UUCP (Tony Li) writes:
>> 
>> 					David Labuda
>
>Hi Dave,
>
>I don't consider this a fair contest.  How many system calls is just not 
>a good metric of a OS's worth.  Let me give you some guesstimates:
>
>	OS		# of system calls
>    ------------	-----------------
>       CP/M 2.2		    40
>       Unix 		    100
>       Tops-20		    100
>       CCP/M		    150
>       VMS		    250
>
While I agree completely with Tony's (hi Tony, how are things going?) premise
that this isn't such a good thing to base an O/S comparison on (but it's
an interesting thing to look at, nonetheless), I'd like to point out that
he overestimated the number of system services in VMS.

VMS V3 has 89 system services and 31 RMS services (filesystem interface) for
a total of 120.  VMS V4 has 119 system services and the same 31 RMS services,
for a total of 150.

	/Kevin Carosso          scgvaxd!engvax!kvc
	 Hughes Aircrft Co.