From: Peter Chubb <peter@chubb.wattle.id.au>
To: Chris Friesen <cfriesen@nortelnetworks.com>
Cc: Mike Waychison <Michael.Waychison@sun.com>,
Linus Torvalds <torvalds@osdl.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Oleg Nesterov <oleg@tv-sign.ru>,
William Lee Irwin III <wli@holomorphy.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Make pipe data structure be a circular list of pages, rather than
Date: Fri, 14 Jan 2005 21:15:38 +1100 [thread overview]
Message-ID: <16871.39882.69994.86833@wombat.chubb.wattle.id.au> (raw)
In-Reply-To: <41DF1F3D.3030006@nortelnetworks.com>
>>>>> "Chris" == Chris Friesen <cfriesen@nortelnetworks.com> writes:
Chris> Mike Waychison wrote:
>> This got me to thinking about how you can heuristically optimize
>> away coalescing support and still allow PAGE_SIZE bytes minimum in
>> the effective buffer.
Chris> While coalescing may be a win in some cases, there should also
Chris> be some way to tell the kernel to NOT coalesce, to handle the
Chris> case where you want minimum latency at the cost of some
Chris> throughput.
SysVr4 pipes used to have two modes: a `legacy' mode that coalesced
data, and a `message' mode that preserved message boundaries. Seems
to me that we could be about to have the latter in Linux...
--
Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au
The technical we do immediately, the political takes *forever*
next prev parent reply other threads:[~2005-01-14 10:38 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-07 14:30 Make pipe data structure be a circular list of pages, rather than Oleg Nesterov
2005-01-07 15:45 ` Alan Cox
2005-01-07 17:23 ` Linus Torvalds
2005-01-08 18:25 ` Hugh Dickins
2005-01-08 18:54 ` Linus Torvalds
2005-01-07 16:17 ` Linus Torvalds
2005-01-07 16:06 ` Alan Cox
2005-01-07 17:33 ` Linus Torvalds
2005-01-07 17:48 ` Linus Torvalds
2005-01-07 20:59 ` Mike Waychison
2005-01-07 23:46 ` Chris Friesen
2005-01-08 21:38 ` Lee Revell
2005-01-08 21:51 ` Linus Torvalds
2005-01-08 22:02 ` Lee Revell
2005-01-08 22:29 ` Davide Libenzi
2005-01-09 4:07 ` Linus Torvalds
2005-01-09 23:19 ` Davide Libenzi
2005-01-14 10:15 ` Peter Chubb [this message]
2005-01-07 21:59 ` Linus Torvalds
2005-01-07 22:53 ` Diego Calleja
2005-01-07 23:15 ` Linus Torvalds
2005-01-10 23:23 ` Robert White
2005-01-07 17:45 ` Chris Friesen
2005-01-07 16:39 ` Davide Libenzi
2005-01-07 17:09 ` Linus Torvalds
2005-08-18 6:07 ` Coywolf Qi Hunt
-- strict thread matches above, loose matches on Subject: below --
2005-01-20 2:14 Robert White
2005-01-16 2:59 Make pipe data structure be a circular list of pages, rather Linus Torvalds
2005-01-19 21:12 ` Make pipe data structure be a circular list of pages, rather than linux
2005-01-20 2:06 ` Robert White
[not found] <Pine.LNX.4.44.0501091946020.3620-100000@localhost.localdomain>
[not found] ` <Pine.LNX.4.58.0501091713300.2373@ppc970.osdl.org>
[not found] ` <Pine.LNX.4.58.0501091830120.2373@ppc970.osdl.org>
2005-01-12 19:50 ` Davide Libenzi
2005-01-12 20:10 ` Linus Torvalds
[not found] <200501070313.j073DCaQ009641@hera.kernel.org>
2005-01-07 3:41 ` William Lee Irwin III
2005-01-07 6:35 ` Linus Torvalds
2005-01-07 6:37 ` Linus Torvalds
2005-01-19 16:29 ` Larry McVoy
2005-01-19 17:14 ` Linus Torvalds
2005-01-19 19:01 ` Larry McVoy
2005-01-20 0:01 ` Linus Torvalds
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