From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Andrew Morton <andrewm@uow.edu.au>
Cc: "David S. Miller" <davem@redhat.com>,
lkml <linux-kernel@vger.kernel.org>,
"netdev@oss.sgi.com" <netdev@oss.sgi.com>
Subject: Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN)
Date: 02 Feb 2001 13:14:33 +0100 [thread overview]
Message-ID: <shs4rydnuxi.fsf@charged.uio.no> (raw)
In-Reply-To: <3A728475.34CF841@uow.edu.au> <3A726087.764CC02E@uow.edu.au> <20010126222003.A11994@vitelus.com> <3A728475.34CF841@uow.edu.au> <14966.22671.446439.838872@pizda.ninka.net> <3A7A8822.CC5D8E4E@uow.edu.au>
In-Reply-To: Andrew Morton's message of "Fri, 02 Feb 2001 21:12:50 +1100"
>>>>> " " == Andrew Morton <andrewm@uow.edu.au> writes:
> Much the same story. Big increase in sendfile() efficiency,
> small drop in send() and NFS unchanged.
This is normal. The server doesn't do zero copy reads, but instead
copies from the page cache into an NFS-specific buffer using
file.f_op->read(). Alexey and Dave's changes are therefore unlikely to
register on NFS performance (other than on CPU use as has been
mentioned before) until we implement a sendfile-like scheme for knfsd
over TCP.
I've been wanting to start doing that (and also to finish the client
conversion to use the TCP zero-copy), but I'm pretty pressed for time
at the moment.
Cheers,
Trond
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next prev parent reply other threads:[~2001-02-02 12:15 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-27 5:45 sendfile+zerocopy: fairly sexy (nothing to do with ECN) Andrew Morton
2001-01-27 6:20 ` Aaron Lehmann
2001-01-27 8:19 ` Andrew Morton
2001-01-27 10:09 ` Ion Badulescu
2001-01-27 10:45 ` Andrew Morton
2001-01-30 6:00 ` David S. Miller
2001-01-30 12:44 ` Andrew Morton
2001-01-30 12:52 ` David S. Miller
2001-01-30 14:58 ` Andrew Morton
2001-01-30 17:49 ` Chris Wedgwood
2001-01-30 22:17 ` David S. Miller
2001-01-31 0:31 ` Chris Wedgwood
2001-01-31 0:45 ` David S. Miller
2001-01-30 22:28 ` David S. Miller
2001-01-30 23:34 ` Andrew Morton
2001-02-02 10:12 ` Andrew Morton
2001-02-02 12:14 ` Trond Myklebust [this message]
2001-02-02 17:51 ` David Lang
2001-02-02 22:46 ` David S. Miller
2001-02-02 22:57 ` David Lang
2001-02-02 23:09 ` David S. Miller
2001-02-02 23:13 ` David Lang
2001-02-02 23:28 ` Jeff Barrow
2001-02-02 23:31 ` David S. Miller
2001-02-03 2:27 ` James Sutherland
2001-01-27 10:05 ` Ion Badulescu
2001-01-27 10:39 ` Andrew Morton
2001-01-27 12:49 ` jamal
2001-01-30 1:06 ` Ion Badulescu
2001-01-30 2:48 ` jamal
2001-01-30 3:26 ` Ion Badulescu
2001-01-31 0:53 ` Still not sexy! (Re: " jamal
2001-01-31 0:59 ` Ingo Molnar
2001-01-31 1:04 ` jamal
2001-01-31 1:14 ` Ingo Molnar
2001-01-31 1:39 ` jamal
2001-01-31 11:21 ` Malcolm Beattie
2001-01-31 11:24 ` Ingo Molnar
2001-01-31 1:10 ` Still not sexy! (Re: sendfile+zerocopy: fairly sexy (nothing to dowith ECN) Rick Jones
2001-01-31 1:45 ` jamal
2001-01-31 2:25 ` Still not sexy! (Re: sendfile+zerocopy: fairly sexy (nothing todowith ECN) Rick Jones
2001-02-04 19:48 ` jamal
2001-02-05 5:13 ` David S. Miller
2001-02-05 18:51 ` Rick Jones
2001-01-27 12:43 ` sendfile+zerocopy: fairly sexy (nothing to do with ECN) jamal
2001-01-27 13:29 ` Andrew Morton
2001-01-27 14:15 ` jamal
2001-01-28 16:05 ` Andrew Morton
2001-01-29 18:50 ` Rick Jones
[not found] ` <200101271854.VAA02845@ms2.inr.ac.ru>
2001-01-28 5:34 ` Andrew Morton
2001-01-28 13:37 ` Felix von Leitner
2001-01-28 14:11 ` Dan Hollis
2001-01-28 14:27 ` Andi Kleen
2001-01-29 21:50 ` Pavel Machek
2001-01-28 19:43 ` Gregory Maxwell
2001-01-28 19:48 ` Choosing Linux NICs (was: Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN)) Felix von Leitner
-- strict thread matches above, loose matches on Subject: below --
2001-01-29 16:16 sendfile+zerocopy: fairly sexy (nothing to do with ECN) Jonathan Earle
2001-01-29 16:34 ` Antonin Kral
2001-01-31 1:49 Bernd Eckenfels
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