From: "Stephen C. Tweedie" <sct@redhat.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Rik van Riel <riel@conectiva.com.br>,
"David S. Miller" <davem@redhat.com>,
hch@caldera.de, netdev@oss.sgi.com, linux-kernel@vger.kernel.org,
Stephen Tweedie <sct@redhat.com>
Subject: Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1
Date: Tue, 9 Jan 2001 14:18:06 +0000 [thread overview]
Message-ID: <20010109141806.F4284@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.21.0101081603080.21675-100000@duckman.distro.conectiva> <Pine.LNX.4.30.0101091051460.1159-100000@e2>
In-Reply-To: <Pine.LNX.4.30.0101091051460.1159-100000@e2>; from mingo@elte.hu on Tue, Jan 09, 2001 at 11:23:41AM +0100
Hi,
On Tue, Jan 09, 2001 at 11:23:41AM +0100, Ingo Molnar wrote:
>
> > Having proper kiobuf support would make it possible to, for example,
> > do zerocopy network->disk data transfers and lots of other things.
>
> i used to think that this is useful, but these days it isnt. It's a waste
> of PCI bandwidth resources, and it's much cheaper to keep a cache in RAM
> instead of doing direct disk=>network DMA *all the time* some resource is
> requested.
No. I'm certain you're right when talking about things like web
serving, but it just doesn't apply when you look at some other
applications, such as streaming out video data or performing
fileserving in a high-performance compute cluster where you are
serving bulk data. The multimedia and HPC worlds typically operate on
datasets which are far too large to cache, so you want to keep them in
memory as little as possible when you ship them over the wire.
Cheers,
Stephen
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next prev parent reply other threads:[~2001-01-09 14:20 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-08 1:24 [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 David S. Miller
2001-01-08 10:39 ` Christoph Hellwig
2001-01-08 10:34 ` David S. Miller
2001-01-08 18:05 ` Rik van Riel
2001-01-08 21:07 ` David S. Miller
2001-01-09 10:23 ` Ingo Molnar
2001-01-09 10:31 ` Christoph Hellwig
2001-01-09 10:31 ` David S. Miller
2001-01-09 11:28 ` Christoph Hellwig
2001-01-09 11:42 ` David S. Miller
2001-01-09 12:04 ` Ingo Molnar
2001-01-09 14:25 ` Stephen C. Tweedie
2001-01-09 14:33 ` Alan Cox
2001-01-09 15:00 ` Ingo Molnar
2001-01-09 15:27 ` Stephen C. Tweedie
2001-01-09 16:16 ` Ingo Molnar
2001-01-09 16:37 ` Alan Cox
2001-01-09 16:48 ` Ingo Molnar
2001-01-09 17:29 ` Alan Cox
2001-01-09 17:38 ` Jens Axboe
2001-01-09 18:38 ` Ingo Molnar
2001-01-09 19:54 ` Andrea Arcangeli
2001-01-09 20:10 ` Ingo Molnar
2001-01-10 0:00 ` Andrea Arcangeli
2001-01-09 20:12 ` Jens Axboe
2001-01-09 23:20 ` Andrea Arcangeli
2001-01-09 23:34 ` Jens Axboe
2001-01-09 23:52 ` Andrea Arcangeli
2001-01-17 5:16 ` Rik van Riel
2001-01-09 17:56 ` Chris Evans
2001-01-09 18:41 ` Ingo Molnar
2001-01-09 22:58 ` [patch]: ac4 blk (was Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1) Jens Axboe
2001-01-09 19:20 ` [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 J Sloan
2001-01-09 18:10 ` Stephen C. Tweedie
2001-01-09 15:38 ` Benjamin C.R. LaHaise
2001-01-09 16:40 ` Ingo Molnar
2001-01-09 17:30 ` Benjamin C.R. LaHaise
2001-01-09 18:12 ` Stephen C. Tweedie
2001-01-09 18:35 ` Ingo Molnar
2001-01-09 17:53 ` Christoph Hellwig
2001-01-09 21:13 ` David S. Miller
2001-01-09 19:14 ` Linus Torvalds
2001-01-09 20:07 ` Ingo Molnar
2001-01-09 20:15 ` Linus Torvalds
2001-01-09 20:36 ` Christoph Hellwig
2001-01-09 20:55 ` Linus Torvalds
2001-01-09 21:12 ` Christoph Hellwig
2001-01-09 21:26 ` Linus Torvalds
2001-01-10 7:42 ` Christoph Hellwig
2001-01-10 8:05 ` Linus Torvalds
2001-01-10 8:33 ` Christoph Hellwig
2001-01-10 8:37 ` Andrew Morton
2001-01-10 23:32 ` Linus Torvalds
2001-01-19 15:55 ` Andrew Scott
2001-01-17 14:05 ` Rik van Riel
2001-01-18 0:53 ` Christoph Hellwig
2001-01-18 1:13 ` Linus Torvalds
2001-01-18 17:50 ` Christoph Hellwig
2001-01-18 18:04 ` Linus Torvalds
2001-01-18 21:12 ` Albert D. Cahalan
2001-01-19 1:52 ` 2.4.1-pre8 video/ohci1394 compile problem ebi4
2001-01-19 6:55 ` [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 Linus Torvalds
2001-01-09 23:06 ` Benjamin C.R. LaHaise
2001-01-09 23:54 ` Linus Torvalds
2001-01-10 7:51 ` Gerd Knorr
2001-01-12 1:42 ` Stephen C. Tweedie
2001-01-09 11:05 ` Ingo Molnar
2001-01-09 18:27 ` Christoph Hellwig
2001-01-09 19:19 ` Ingo Molnar
2001-01-09 14:18 ` Stephen C. Tweedie [this message]
2001-01-09 14:40 ` Ingo Molnar
2001-01-09 14:51 ` Alan Cox
2001-01-09 15:17 ` Stephen C. Tweedie
2001-01-09 15:37 ` Ingo Molnar
2001-01-09 21:18 ` David S. Miller
2001-01-09 22:25 ` Linus Torvalds
2001-01-10 15:21 ` Stephen C. Tweedie
2001-01-09 15:25 ` Stephen Frost
2001-01-09 15:40 ` Ingo Molnar
2001-01-09 15:48 ` Stephen Frost
2001-01-10 1:14 ` Dave Zarzycki
2001-01-10 1:14 ` David S. Miller
2001-01-10 2:18 ` Dave Zarzycki
2001-01-10 1:19 ` Ingo Molnar
2001-01-10 2:56 ` storage over IP (was Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1) dean gaudet
2001-01-10 2:58 ` David S. Miller
2001-01-10 3:18 ` dean gaudet
2001-01-10 3:09 ` David S. Miller
2001-01-10 3:05 ` storage over IP (was Re: [PLEASE-TESTME] Zerocopy networking patch, Alan Cox
2001-01-08 21:56 ` [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 Jes Sorensen
2001-01-08 21:48 ` David S. Miller
2001-01-08 22:32 ` Jes Sorensen
2001-01-08 22:36 ` David S. Miller
2001-01-09 12:12 ` Ingo Molnar
2001-01-08 22:43 ` Stephen Frost
2001-01-08 22:37 ` David S. Miller
2001-01-09 13:52 ` Trond Myklebust
2001-01-09 13:42 ` David S. Miller
2001-01-09 15:27 ` Trond Myklebust
2001-01-09 21:19 ` David S. Miller
2001-01-10 9:21 ` Trond Myklebust
-- strict thread matches above, loose matches on Subject: below --
2001-01-09 13:08 Stephen Landamore
2001-01-09 13:24 ` Ingo Molnar
2001-01-09 13:47 ` Andrew Morton
2001-01-09 19:15 ` Dan Hollis
2001-01-09 19:14 ` Dan Hollis
2001-01-09 22:03 ` David S. Miller
2001-01-09 22:58 ` Dan Hollis
2001-01-09 22:59 ` Ingo Molnar
2001-01-09 23:11 ` Dan Hollis
2001-01-10 3:24 ` Chris Wedgwood
2001-01-09 17:46 Manfred Spraul
2001-01-10 8:41 Manfred Spraul
2001-01-10 8:31 ` David S. Miller
2001-01-10 11:25 ` Ingo Molnar
2001-01-10 12:03 ` Manfred Spraul
2001-01-10 12:07 ` Ingo Molnar
2001-01-10 16:18 ` Jamie Lokier
2001-01-13 15:43 ` yodaiken
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