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Date: Mon, 18 Jun 2001 16:43:22 +0200
From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: "David S. Miller" <davem@redhat.com>
Cc: Pete Wyckoff <pw@osc.edu>, nick@snowman.net, Kip Macy <kmacy@netapp.com>,
        Linux Kernel List <linux-kernel@vger.kernel.org>
Subject: Re: 3com Driver and the 3XP Processor
Message-ID: <20010618164322.A28377@pcep-jamie.cern.ch>
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David S. Miller wrote:
> Pete Wyckoff writes:
>  > We're currently working on using both processors
>  > of the Tigon in parallel.
> 
> It is my understanding that on the Tigon2, the second processor is
> only for working around hw bugs in the DMA controller of the board and
> cannot be used for other tasks.

It certainly can be used for other tasks.  At CERN we have programmed
both processors on the Tigon2 to act as a traffic generator &
measurement tool to test switches.  We use lots of cards in parallel to
drive all ports on a switch.  It's given us much more useful results
than the expensive S*******s tester.

We even went so far as to build a Tigon2 development kit for Linux, and
got about 5% better performance just from using a better version of GCC and
linker tricks.

The Tigon2 cards are wonderful because of our ability to program it
however we like, and I really hope we can build similar interesting devices
from a crop of someone's Tigon3 cards.

-- Jamie