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From: Terry Lambert <terry@lambert.org>
Newsgroups: comp.os.linux.networking,comp.unix.bsd.netbsd.misc,comp.unix.bsd.freebsd.misc
Subject: Re: TCP latency
Date: Sun, 14 Jul 1996 17:49:58 -0700
Organization: Me
Lines: 24
Message-ID: <31E995B6.573A3461@lambert.org>
References: <4paedl$4bm@engnews2.eng.sun.com>
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<4rpdtn$30b@symiserver2.symantec.com> <x7ohlq78wt.fsf@oberon.di.fc.ul.pt>
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Xref: euryale.cc.adfa.oz.au comp.os.linux.networking:45199 comp.unix.bsd.netbsd.misc:4042 comp.unix.bsd.freebsd.misc:23556
Matt Thomas wrote:
] In article <m24tnf9f69.fsf@frob.mlm.extern.lrz-muenchen.de>,
] Andi Kleen <andi@mlm.extern.lrz-muenchen.de> writes:
]
] >I think a mmap() interface to sockets would be more elegant (and
] >you could do exactly the same thing)
]
] I can't see how mmap() would map to a socket. Unlike a file,
] you can't directly address portions of a communication stream.
] What would lseek do? Sockets have semantics that are very
] sequential in nature. mmap is not a good fit.
]
] How would you use mmap on a pipe?
You would map the buffer into both the source and target
applications address spaces, and avoid the user->kernel->user
copies.
Terry Lambert
terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.