Path: utzoo!mnetor!uunet!husc6!bbn!gatech!ulysses!hector!ekrell
From: ekrell@hector.UUCP (Eduardo Krell)
Newsgroups: comp.unix.wizards
Subject: Re: SVR3.0 vs BSD4.3
Message-ID: <10179@ulysses.homer.nj.att.com>
Date: 23 Mar 88 01:59:55 GMT
References: <12414@brl-adm.ARPA> <4361@megaron.arizona.edu> <7499@brl-smoke.ARPA> <20768@bu-cs.BU.EDU> <7511@brl-smoke.ARPA> <4441@megaron.arizona.edu>
Sender: netnews@ulysses.homer.nj.att.com
Reply-To: ekrell@hector (Eduardo Krell)
Organization: AT&T Bell Labs, Murray Hill
Lines: 15

In article <4441@megaron.arizona.edu> lm@megaron.arizona.edu.UUCP (Larry McVoy) writes:

>(It should be obvious but I'll drive it home:  the streams code that I've
>seen copies the data out of the upper level buffer and then into the 
>lower level buffer [assuming "downward" movement].  The copying dominates
>the time spent in the streams drivers.  If streams can handle imbedded 
>pointers in their data then my comments are meaningless.)

Well, now. The streams modules that I've seen so far avoid copying data
as much as possible. Passing a message up or downstream is often
accomplished by just passing pointers to the data.
    
    Eduardo Krell                   AT&T Bell Laboratories, Murray Hill, NJ

    UUCP: {ihnp4,ucbvax}!ulysses!ekrell		ARPA: ekrell@ulysses.att.com