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From: Stephen Hemminger <shemminger@linux-foundation.org>
To: "Sreenivasa Honnur" <Sreenivasa.Honnur@neterion.com>
Cc: "Kok, Auke" <auke-jan.h.kok@intel.com>,
	"David Miller" <davem@davemloft.net>,
	"Garzik, Jeff" <jgarzik@pobox.com>, <netdev@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>,
	"Peter Waskiewicz Jr" <peter.p.waskiewicz.jr@intel.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@intel.com>,
	"Kok, Auke" <auke@foo-projects.org>,
	"Ronciak, John" <john.ronciak@intel.com>
Subject: Re: [PATCH 1/2] NET: Multiple queue network device support
Date: Fri, 23 Feb 2007 11:19:11 -0800	[thread overview]
Message-ID: <20070223111911.75602c0f@freekitty> (raw)
In-Reply-To: <78C9135A3D2ECE4B8162EBDCE82CAD77013F383F@nekter>

On Fri, 23 Feb 2007 04:00:55 -0500
"Sreenivasa Honnur" <Sreenivasa.Honnur@neterion.com> wrote:

> Fucntion "map_queue" returns queue index as '0'. There is no support to
> return different queue indexes.
> 
> -----Original Message-----
> From: netdev-owner@vger.kernel.org [mailto:netdev-owner@vger.kernel.org]
> On Behalf Of Kok, Auke
> Sent: Friday, February 09, 2007 5:40 AM
> To: David Miller; Garzik, Jeff; netdev@vger.kernel.org;
> linux-kernel@vger.kernel.org
> Cc: Kok, Auke; Peter Waskiewicz Jr; Brandeburg, Jesse; Kok, Auke;
> Ronciak, John
> Subject: [PATCH 1/2] NET: Multiple queue network device support
> 
> 
> From: Peter Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
> 
> Added an API and associated supporting routines for multiqueue network
> devices.  This allows network devices supporting multiple TX queues to
> configure each queue within the netdevice and manage each queue
> independantly.  Changes to the PRIO Qdisc also allow a user to map
> multiple flows to individual TX queues, taking advantage of each queue
> on the device.
> 
> Signed-off-by: Peter Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
> ---

>  
> +config NET_MULTI_QUEUE_DEVICE
> +	bool "Multiple queue network device support (EXPERIMENTAL)"
> +	depends on NET_SCHED && EXPERIMENTAL
> +	help
> +	  Saying Y here will add support for network devices that have
> more than
> +	  one physical TX queue and/or RX queue.
> +
> +	  Multiple queue devices will require qdiscs that understand how
> to
> +	  queue to multiple targets.  The default packet scheduler will
> default
> +	  to the first queue in a device.  In other words, if you need
> the
> +	  ability to spread traffic across queues, your queueing
> discipline
> +	  needs to know how to do that.
> +
> +	  Note that saying Y here will give preferential treatment to
> multiple
> +	  queue devices in the network stack.  A slight drop in
> single-queue
> +	  device performance may be seen.
> +
> +	  Say N here unless you know your network device supports
> multiple
> +	  TX and/or RX queues.
> +

This should not be a user visible configuration option.
It should either: always be part of the kernel API
or be selected by drivers that need/want it.

-- 
Stephen Hemminger <shemminger@linux-foundation.org>

  parent reply	other threads:[~2007-02-23 19:23 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-23  9:00 Sreenivasa Honnur
2007-02-23 19:05 ` Waskiewicz Jr, Peter P
2007-02-23 19:19 ` Stephen Hemminger [this message]
2007-02-23 19:23   ` Kok, Auke
  -- strict thread matches above, loose matches on Subject: below --
2007-02-23  9:02 Sreenivasa Honnur
2007-02-09  0:09 [PATCH 0/2 REVIEW] Multiple transmit/receive queue kernel Kok, Auke
2007-02-09  0:09 ` [PATCH 1/2] NET: Multiple queue network device support Kok, Auke
2007-02-27  1:03   ` David Miller
2007-02-27 19:38     ` Waskiewicz Jr, Peter P
2007-03-07 22:18     ` Waskiewicz Jr, Peter P
2007-03-07 22:42       ` David Miller
2007-03-09  7:26         ` Jarek Poplawski
2007-03-09 13:40   ` Thomas Graf
2007-03-09 19:25     ` Waskiewicz Jr, Peter P
2007-03-09 23:01       ` Thomas Graf
2007-03-09 23:27         ` Waskiewicz Jr, Peter P
2007-03-10  2:34           ` Thomas Graf
2007-03-10 20:37             ` Waskiewicz Jr, Peter P
2007-03-12  8:58     ` Jarek Poplawski
2007-03-12 20:21       ` Waskiewicz Jr, Peter P

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