From: Gerold Jury <gjury@hal.grips.com>
To: <mingo@elte.hu>
Cc: <linux-kernel@vger.kernel.org>, <linux-aio@kvack.org>, <bcrl@redhat.com>
Subject: Re: aio
Date: Fri, 21 Dec 2001 16:27:06 +0100 [thread overview]
Message-ID: <200112211527.fBLFR6X07357@hal.grips.com> (raw)
In-Reply-To: <Pine.LNX.4.33.0112211446370.5098-100000@localhost.localdomain>
In-Reply-To: <Pine.LNX.4.33.0112211446370.5098-100000@localhost.localdomain>
On Friday 21 December 2001 14:48, Ingo Molnar wrote:
> On Fri, 21 Dec 2001, Gerold Jury wrote:
> > It is simply too early for sexy discussions. For me, the most
> > appealing part of AIO is the socket handling. It seems a little bit
> > broken in the current glibc emulation/implementation. Recv and send
> > operations are ordered when used on the same socket handle. Thus a
> > recv must be finished before a subsequent send will happen. Good idea
> > for files, bad for sockets.
>
> is this a fundamental limitation expressed in the interface, or just an
> implementational limitation? On sockets this is indeed a big problem, HTTP
> pipelining wants completely separate receive/send queues.
>
> Ingo
>
That is a very good question.
The Single UNIX ® Specification, Version 2 has the following to say.
If _POSIX_SYNCHRONIZED_IO is defined and synchronised I/O is enabled on the
file associated with aiocbp->aio_fildes, the behaviour of this function is
according to the definitions of synchronised I/O data integrity completion
and synchronised I/O file integrity completion.
Maybe a was a little bit too fast in blaming glibc. I will go and look for
more documentation about disabling synchronised I/O on a socket.
Dup()licating the socket handle is an easy workaround, but now i am
convinced, a little bit man page digging will be lots of fun.
I hope the efforts of Benjamin LaHaise receive more attention and as soon as
i know more about disabling synchronised I/O on sockets i will send an other
email.
Gerold
--
I love AIO
next prev parent reply other threads:[~2001-12-21 15:28 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20011218020456.A11541@redhat.com>
2001-12-18 16:50 ` Scheduler ( was: Just a second ) Linus Torvalds
2001-12-18 16:56 ` Rik van Riel
2001-12-18 17:18 ` Linus Torvalds
2001-12-18 19:04 ` Alan Cox
2001-12-18 21:02 ` Larry McVoy
2001-12-18 21:18 ` Rik van Riel
2001-12-19 17:44 ` IRC (was: Scheduler) Daniel Phillips
2001-12-19 17:51 ` Larry McVoy
2001-12-19 18:24 ` Daniel Phillips
2001-12-19 18:19 ` M. Edward (Ed) Borasky
2001-12-19 18:27 ` Daniel Phillips
2001-12-19 18:40 ` J Sloan
2001-12-18 21:14 ` Scheduler ( was: Just a second ) David S. Miller
2001-12-18 21:17 ` Larry McVoy
2001-12-18 21:19 ` Rik van Riel
2001-12-18 21:30 ` David S. Miller
2001-12-19 16:50 ` Daniel Phillips
[not found] ` <Pine.LNX.4.33.0112190859050.1872-100000@penguin.transmeta.com>
2001-12-19 18:57 ` aio Ben LaHaise
2001-12-19 19:29 ` aio Dan Kegel
2001-12-20 4:04 ` aio Benjamin LaHaise
2001-12-19 20:09 ` aio Daniel Phillips
2001-12-19 20:21 ` aio Davide Libenzi
2001-12-19 20:23 ` aio Pete Zaitcev
2001-12-20 0:13 ` aio David S. Miller
2001-12-20 0:21 ` aio Benjamin LaHaise
2001-12-20 0:36 ` aio Andrew Morton
2001-12-20 0:55 ` aio H. Peter Anvin
2001-12-20 0:47 ` aio Davide Libenzi
2001-12-20 1:16 ` aio Bill Huey
2001-12-20 1:20 ` aio David S. Miller
2001-12-20 2:26 ` aio Bill Huey
2001-12-20 2:37 ` aio Cameron Simpson
2001-12-20 2:45 ` aio David S. Miller
2001-12-19 18:57 ` aio John Heil
2001-12-20 3:06 ` aio David S. Miller
2001-12-19 19:30 ` aio John Heil
2001-12-20 3:21 ` aio Bill Huey
2001-12-27 9:36 ` aio Martin Dalecki
2001-12-20 5:29 ` aio David S. Miller
2001-12-20 3:07 ` aio Bill Huey
2001-12-20 3:13 ` aio David S. Miller
2001-12-20 3:47 ` aio Benjamin LaHaise
2001-12-21 17:24 ` aio Alan Cox
2001-12-21 17:16 ` aio Benjamin LaHaise
2001-12-23 5:35 ` aio Bill Huey
2001-12-20 5:39 ` aio David S. Miller
2001-12-20 5:58 ` aio Benjamin LaHaise
2001-12-20 6:00 ` aio David S. Miller
2001-12-20 6:46 ` aio Mike Castle
2001-12-20 6:55 ` aio Robert Love
2001-12-20 7:13 ` aio Mike Castle
2001-12-20 7:01 ` aio David S. Miller
2001-12-20 7:27 ` aio Daniel Phillips
[not found] ` <Pine.LNX.4.33.0112201127400.2656-100000@localhost.localdomain>
2001-12-20 11:49 ` aio William Lee Irwin III
2001-12-20 16:32 ` aio Dan Kegel
2001-12-20 18:05 ` aio Davide Libenzi
2001-12-20 21:45 ` aio Lincoln Dale
2001-12-20 21:59 ` aio Linus Torvalds
2001-12-24 11:44 ` aio Gerold Jury
2001-12-20 23:02 ` aio Lincoln Dale
2001-12-20 14:38 ` aio Luigi Genoni
2001-12-20 17:26 ` aio Henning Schmiedehausen
2001-12-20 20:04 ` aio M. Edward (Ed) Borasky
2001-12-20 23:53 ` aio David S. Miller
2001-12-21 0:28 ` Offtopic Java/C# [Re: aio] Bill Huey
2001-12-20 5:16 ` aio Pete Zaitcev
2001-12-20 16:16 ` aio Dan Kegel
2001-12-21 11:44 ` aio Gerold Jury
2001-12-21 13:48 ` aio Ingo Molnar
2001-12-21 15:27 ` Gerold Jury [this message]
2001-12-24 11:08 ` aio Gerold Jury
2001-12-20 17:24 ` aio Henning Schmiedehausen
2001-12-20 2:47 ` aio David S. Miller
2001-12-20 2:52 ` aio Cameron Simpson
2001-12-20 2:58 ` aio David S. Miller
2001-12-20 5:47 ` aio Linus Torvalds
2001-12-20 5:57 ` aio David S. Miller
2001-12-20 5:59 ` aio Benjamin LaHaise
2001-12-20 6:02 ` aio David S. Miller
2001-12-20 6:07 ` aio Benjamin LaHaise
2001-12-20 6:09 ` aio Linus Torvalds
2001-12-20 17:28 ` aio Suparna Bhattacharya
2001-12-20 6:12 ` aio David S. Miller
2001-12-20 6:23 ` aio Linus Torvalds
2001-12-20 10:18 ` aio Ingo Molnar
2001-12-20 18:20 ` aio Robert Love
2001-12-20 22:30 ` aio Cameron Simpson
2001-12-20 22:46 ` aio Benjamin LaHaise
2001-12-20 5:07 ` aio Pete Zaitcev
2001-12-20 5:10 ` aio Cameron Simpson
2001-12-21 17:28 ` aio Alan Cox
2001-12-23 5:46 ` aio Bill Huey
2001-12-23 6:34 ` aio Dan Kegel
2001-12-23 18:43 ` aio Davide Libenzi
2001-12-26 20:42 ` Java and Flam^H^H^H^H AIO (was: aio) Daniel Phillips
2001-12-18 19:11 ` Scheduler ( was: Just a second ) Mike Galbraith
2001-12-18 19:15 ` Rik van Riel
2001-12-18 22:32 ` in defense of the linux-kernel mailing list Ingo Molnar
2001-12-18 17:55 ` Scheduler ( was: Just a second ) Davide Libenzi
2001-12-18 19:43 ` Alexander Viro
2001-12-20 2:56 aio Mikael Pettersson
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