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Subject: Re: kern/174851: [bxe] [patch] UDP checksum offload is wrong in bxe
 driver
From: Adrian Chadd <adrian@freebsd.org>
To: Garrett Cooper <yanegomi@gmail.com>
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Cc: Barney Cordoba <barney_cordoba@yahoo.com>,
 David Christensen <davidch@freebsd.org>, linimon@freebsd.org,
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On 31 December 2012 07:58, Garrett Cooper <yanegomi@gmail.com> wrote:

> I would ask David about whether or not there was a performance
> difference because they might have some numbers for if_bxe.
>
> Not sure about the concept in general, but it seems like a reasonable
> application protocol specific request. But by and large, I agree that
> UDP checksumming doesn't make logical sense because it adds
> unnecessary overhead on a L3 protocol that's assumed to be unreliable.

People are terminating millions of VoIP calls on FreeBSD devices. All using UDP.

I can imagine large scale VoIP gateways wanting to try and benefit from this.



Adrian