Subject: Re: multiple Tx queues
To: None <tech-net@NetBSD.org>
From: David Young <email@example.com>
Date: 01/11/2004 19:21:52
On Sat, Jan 10, 2004 at 07:15:53PM -0800, Sam Leffler wrote:
> On Saturday 10 January 2004 12:46 pm, Greg Troxel wrote:
> > Or are you talking about cards that have multiple queues, where each
> > queue is associated with a link-layer priority scheme (perhaps that
> > even extends across switches, e.g vlan-like qos tags - I'm not clear
> > on the standards here).
> The Atheros 5212-based cards support multiple xmit queues and implement a
> variety of queueing policies in h/w. This stuff is explicitly intended to
> supoprt QoS as set out, for example, the WME spec. Applications include VoIP
> and streaming video. To effectively use this stuff applications need to be
> able to tag packets and have the OS stay out of the way except to not smash
> the tag before it reaches the driver (where it can be used to select the
> appropriate queue).
Interesting. Are these "tags" in the abstract or VLAN tags?
David Young OJC Technologies
firstname.lastname@example.org Urbana, IL * (217) 278-3933