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Date: Wed, 5 May 2010 16:48:22 +0000
From: Navdeep Parhar <np@FreeBSD.org>
To: Rui Paulo <rpaulo@FreeBSD.org>
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Subject: Re: svn commit: r207643 - in head: sys/dev/cxgb usr.sbin/cxgbtool
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On Wed, May 05, 2010 at 11:02:49AM +0100, Rui Paulo wrote:
> On 5 May 2010, at 01:41, Navdeep Parhar wrote:
> 
> > Author: np
> > Date: Wed May  5 00:41:40 2010
> > New Revision: 207643
> > URL: http://svn.freebsd.org/changeset/base/207643
> > 
> > Log:
> >  Add support for hardware filters to cxgb(4).  The T3 chip can inspect
> >  L2/3/4 headers and can drop or steer packets as instructed.  Filtering
> >  based on src ip, dst ip, src port, dst port, 802.1q, udp/tcp, and mac
> >  addr is possible.  Add support in cxgbtool to program these filters.
> >  Some simple examples:
> > 
...
> >  MFC after:	2 weeks
> 
> Wow, this is great! So this is able to do packet filtering at 10Gbps with no CPU impact?

Yes, a packet that is dropped due to a filter match is dropped by the
NIC's silicon.  There is no CPU impact.

Regards,
Navdeep

> 
> Regards,
> --
> Rui Paulo
> 
>