Date: Tue, 22 May 2012 10:46:57 -0700 From: Jack Vogel <jfvogel@gmail.com> To: Venkat Duvvuru <venkatduvvuru.ml@gmail.com> Cc: freebsd-net@freebsd.org, "Bjoern A. Zeeb" <bz@freebsd.org>, freebsd-questions@freebsd.org Subject: Re: LRO support for IPv6 Message-ID: <CAFOYbcncAGPA6d7qh7bonGy2ijcApD_TQgqvSoM2Mbif-z8sYg@mail.gmail.com> In-Reply-To: <CAGdae7ZX4M4NPnJ=3K1vA9TLPW22r2EpTic-Y4kJMyJQGn3zGw@mail.gmail.com> References: <CAGdae7bcWqGbObygPdZwCyVG4Pe-0Fxq5_p19oCp61uzZ4N8xw@mail.gmail.com> <CAFOYbc=ng83L8iZ_N79edqhknOrDPqVA9ASMexW5-yU0vnduDQ@mail.gmail.com> <A8DB9672-6B84-4635-84B6-43CC98B2877F@FreeBSD.org> <CAFOYbckwRw4jazwqY1S7X2wiSdBBBPdg-Xk8ya99j1%2BWbqB=DA@mail.gmail.com> <72B744D5-3D24-4A56-907C-2A8F6620877B@FreeBSD.org> <CAGdae7ZX4M4NPnJ=3K1vA9TLPW22r2EpTic-Y4kJMyJQGn3zGw@mail.gmail.com>
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LRO is a huge win for 10G (as is TSO on the TX side), so odds are good its behind the drop, in any case you'll be able to test that soon :) Jack On Tue, May 22, 2012 at 10:35 AM, Venkat Duvvuru <venkatduvvuru.ml@gmail.com > wrote: > Thanks for the response. > > I observed that there is a significant performance drop in case of IPv6 on > the "rx" side. > While I'm able to hit line rate ~9.5 Gbps on a 10gb NIC for IPv4..I could > only get ~6 Gbps on the "rx" front for IPv6...However "tx" for IPv6 is on > par with IPv4 hitting almost line rates. > > Could this be because of lack of LRO6?? > > Note: hwpmc profiling shows that most of the time is spent in the IPv6 > stack code > > /Venkat > On Tue, May 22, 2012 at 10:37 PM, Bjoern A. Zeeb <bz@freebsd.org> wrote: > >> >> On 22. May 2012, at 17:04 , Jack Vogel wrote: >> >> > Oh, that's right, distracted with other projects and I forgot, now we >> just need >> > to have an LRO that works with forwarding eh :) >> >> That's a 6 line bainaid commit afterwards, basically returning form the >> LRO queuing >> function in case forwarding is turned on for that address family; a >> proper solution >> for long term can than be done whenever we feel like it. The above we >> should have done >> years ago;) >> >> >> > You ROCK bz :) >> > >> > Jack >> > >> > >> > On Tue, May 22, 2012 at 10:01 AM, Bjoern A. Zeeb <bz@freebsd.org> >> wrote: >> > >> > On 22. May 2012, at 16:50 , Jack Vogel wrote: >> > >> > > The LRO code as it stands right now is IPV4 specific, it would be >> nice to >> > > extend it, one of >> > > many improvements that may get done at some point. >> > >> > I am about to commit it to HEAD. Bear another few days with me; I know >> > I am running late but committing new code had less prio than some other >> > real life things currently. >> > >> > I'll also bring TSO6, etc... >> >> -- >> Bjoern A. Zeeb You have to have visions! >> It does not matter how good you are. It matters what good you do! >> >> >
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