Date: Mon, 31 Dec 2012 11:00:30 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Garrett Cooper <yanegomi@gmail.com> Cc: Barney Cordoba <barney_cordoba@yahoo.com>, David Christensen <davidch@freebsd.org>, linimon@freebsd.org, freebsd-net@freebsd.org Subject: Re: kern/174851: [bxe] [patch] UDP checksum offload is wrong in bxe driver Message-ID: <CAJ-VmonQ2UXneComC_2CQ_wRrUq9eR4XD9JLezz5AEFzRqB_Lw@mail.gmail.com> In-Reply-To: <CAGH67wSRdvWMRqU_SgFYNp6jPRohig%2BcrWDjem_BBXpKOTXqtw@mail.gmail.com> References: <201212310728.qBV7SPKC064686@freefall.freebsd.org> <1356969238.85857.YahooMailClassic@web121602.mail.ne1.yahoo.com> <CAGH67wSRdvWMRqU_SgFYNp6jPRohig%2BcrWDjem_BBXpKOTXqtw@mail.gmail.com>
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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
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