*BSD News Article 8264


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From: pcg@aber.ac.uk (Piercarlo Grandi)
Newsgroups: comp.unix.sysv386,comp.unix.bsd,comp.windows.x
Subject: Re: I need 8514/ATI Graphics Ultra support for ISC UNIX SVR3.2 & X11R4
Message-ID: <PCG.92Nov28162148@aberdb.aber.ac.uk>
Date: 28 Nov 92 16:21:48 GMT
References: <1992Nov23.073800.6592@Informatik.TU-Muenchen.DE>
	<1eshe9INNeum@agate.berkeley.edu>
	<1992Nov24.172506.29957@Informatik.TU-Muenchen.DE>
	<1992Nov24.195427.16289@netcom.com>
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Reply-To: pcg@aber.ac.uk (Piercarlo Grandi)
Organization: Prifysgol Cymru, Aberystwyth
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In-Reply-To: hasty@netcom.com's message of 24 Nov 92 19: 54:27 GMT
Nntp-Posting-Host: aberdb

On 24 Nov 92 19:54:27 GMT, hasty@netcom.com (Amancio Hasty Jr) said:

hasty> On a different topic, does any one has any information on
hasty> implementing the local ipc mechanism between the server and its
hasty> clients using shared memory.

This looks like a bad idea; with SVR4 we have a more or less
standardized solution for local ipc, so it's better not to touch it.

hasty> This is another area which if its implemented properly can boost
hasty> the performance of the server, some claimed by a factor of two
hasty> for certain operations.

I am very skeptical about this; for small messages the overhead of using
streams is not important, and otherwise, for large messages, support of
the SHM extension is built in, so it's already there.

--
Piercarlo Grandi                   | JNET: pcg@uk.ac.aber
Dept of CS, University of Wales    | UUCP: ...!aber-cs!pcg
Penglais, Aberystwyth SY23 3BZ, UK | INET: pcg@aber.ac.uk