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From: Nivedita Singhvi <niv@us.ibm.com>
To: Roy Sigurd Karlsbakk <roy@karlsbakk.net>
Cc: bert hubert <ahu@ds9a.nl>,
	netdev@oss.sgi.com,
	Kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: O_DIRECT sockets? (was [RESEND] tuning linux for high network  performance?)
Date: Wed, 23 Oct 2002 09:34:38 -0700	[thread overview]
Message-ID: <3DB6CF9E.327E165F@us.ibm.com> (raw)
In-Reply-To: 200210231726.21135.roy@karlsbakk.net

Roy Sigurd Karlsbakk wrote:

> I'm doing O_DIRECT read (from disk), so it needs to be user -> kernel, then.
> 
> any chance of using O_DIRECT to the socket?

Hmm, I'm still not clear on why you cannot use sendfile()?
I was not aware of any upper limit to the file size in order
for sendfile() to be used?  From what little I know, this 
is exactly the kind of situation that sendfile was intended
to benefit. 

thanks,
Nivedita

WARNING: multiple messages have this Message-ID (diff)
From: Nivedita Singhvi <niv@us.ibm.com>
To: Roy Sigurd Karlsbakk <roy@karlsbakk.net>
Cc: bert hubert <ahu@ds9a.nl>,
	netdev@oss.sgi.com,
	Kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: O_DIRECT sockets? (was [RESEND] tuning linux for high network performance?)
Date: Wed, 23 Oct 2002 09:34:38 -0700	[thread overview]
Message-ID: <3DB6CF9E.327E165F@us.ibm.com> (raw)
In-Reply-To: 200210231726.21135.roy@karlsbakk.net

Roy Sigurd Karlsbakk wrote:

> I'm doing O_DIRECT read (from disk), so it needs to be user -> kernel, then.
> 
> any chance of using O_DIRECT to the socket?

Hmm, I'm still not clear on why you cannot use sendfile()?
I was not aware of any upper limit to the file size in order
for sendfile() to be used?  From what little I know, this 
is exactly the kind of situation that sendfile was intended
to benefit. 

thanks,
Nivedita

  reply	other threads:[~2002-10-23 16:32 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-23 10:18 tuning linux for high network performance? Roy Sigurd Karlsbakk
2002-10-23 11:06 ` [RESEND] " Roy Sigurd Karlsbakk
2002-10-23 13:01   ` bert hubert
2002-10-23 13:21     ` David S. Miller
2002-10-23 13:42       ` Roy Sigurd Karlsbakk
2002-10-23 17:01         ` bert hubert
2002-10-23 17:10           ` Ben Greear
2002-10-23 17:11           ` Richard B. Johnson
2002-10-23 17:12           ` Nivedita Singhvi
2002-10-23 17:56             ` Richard B. Johnson
2002-10-23 18:07               ` Nivedita Singhvi
2002-10-23 18:30                 ` Richard B. Johnson
2002-10-24  4:11         ` David S. Miller
2002-10-24  9:37           ` Karen Shaeffer
2002-10-24 10:30           ` sendfile64() anyone? (was [RESEND] tuning linux for high network performance?) Roy Sigurd Karlsbakk
2002-10-24 10:47             ` David S. Miller
2002-10-24 11:07               ` Roy Sigurd Karlsbakk
2002-10-23 13:41     ` [RESEND] tuning linux for high network performance? Roy Sigurd Karlsbakk
2002-10-23 14:59     ` Nivedita Singhvi
2002-10-23 15:26       ` O_DIRECT sockets? (was [RESEND] tuning linux for high network performance?) Roy Sigurd Karlsbakk
2002-10-23 16:34         ` Nivedita Singhvi [this message]
2002-10-23 16:34           ` Nivedita Singhvi
2002-10-24 10:14           ` Roy Sigurd Karlsbakk
2002-10-24 10:46             ` David S. Miller
2002-10-24 10:46               ` David S. Miller
2002-10-23 18:01   ` [RESEND] tuning linux for high network performance? Denis Vlasenko
2002-10-23 13:36     ` Roy Sigurd Karlsbakk
2002-10-24 16:22       ` Denis Vlasenko
2002-10-24 11:50         ` Russell King
2002-10-24 12:42           ` bert hubert
2002-10-24 17:41           ` Denis Vlasenko
2002-10-25 11:36             ` Csum and csum copyroutines benchmark Denis Vlasenko
2002-10-25  7:48               ` Momchil Velikov
2002-10-25 13:59                 ` Denis Vlasenko
2002-10-25  9:47                   ` Momchil Velikov
2002-10-25 10:19                   ` Alan Cox
2002-10-25 16:00                     ` Denis Vlasenko
2002-10-25 14:26               ` Daniel Egger
2002-10-23 14:52     ` [RESEND] tuning linux for high network performance? Nivedita Singhvi

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