Date: Mon, 11 Aug 2014 21:01:11 +0800 From: Niu Zhixiong <kaiaixi@gmail.com> To: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, John-Mark Gurney <jmg@funkthat.com>, "Eggert, Lars" <lars@netapp.com>, Bill Yuan <bycn82@gmail.com> Subject: Re: A problem on TCP in High RTT Environment. Message-ID: <CAOENNMCxWaAs-7k8wFujy%2BXB5cSe6FVbOdhF=ugfPww_YYiv3g@mail.gmail.com> In-Reply-To: <31C0C883-A847-4746-96FA-FE3148B4BD31@lurchi.franken.de> References: <CAOENNMA_CiBDJc0kchzUbTcf_JBwTJPF=PdBAUB6FPo-KzYkeQ@mail.gmail.com> <20140809184232.GF83475@funkthat.com> <8AE1AC56-D52F-4F13-AAA3-BB96042B37DD@lurchi.franken.de> <20140809204500.GG83475@funkthat.com> <3F6BC212-4223-4AAC-8668-A27075DC55C2@lurchi.franken.de> <CAOENNMCPuiYS7LHwMfOczhZ4yisjGkpOmWzv2pcAoi9Hhzb7dw@mail.gmail.com> <20140810022350.GI83475@funkthat.com> <CAOENNMB3=FZx5kSHVPDPBTtMKbmYJ=c_XNMcuYuoLPe=6U%2Bkxg@mail.gmail.com> <CAOENNMARg36KH1Y%2B0wG8pd7sSf8XKnMf6g790_KiKaj3Mdwyjw@mail.gmail.com> <20140810033212.GL83475@funkthat.com> <CAOENNMA-dwPQr53bM4rzC=1eitoi-JAB4mCGx4zybFwUC=GMNg@mail.gmail.com> <17A804F3-BEA6-46F4-887F-B68750618FD9@netapp.com> <CAOENNMCbY3L%2BCXn1DFSwhUtMb7xXVeEhPWYLHdy4c8A%2BStPNOA@mail.gmail.com> <31C0C883-A847-4746-96FA-FE3148B4BD31@lurchi.franken.de>
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For 60s test at 20Mbps, 200ms delay with hw.igb.num_queues=3D2 speed is 9.5Mbps. and without it the speed is 9.1Mbps. However, SCTP is 17.10. For 60s test at 20Mbps, 150ms delay with hw.igb.num_queues=3D2 speed is 11.1Mbps. and without it the speed is 9.92Mbps. However, SCTP is 18.59. For 60s test at 20Mbps, 150ms delay with hw.igb.num_queues=3D2 speed is 11.13Mbps. and without it the speed is 9.92Mbps. However, SCTP is 18.59. For 60s test at 20Mbps, 100ms delay with hw.igb.num_queues=3D2 speed is 9.9Mbps. and without it the speed is 11.13Mbps. For 60s test at 20Mbps, 50ms delay with hw.igb.num_queues=3D2 speed is 13.1Mbps. and without it the speed is 13.1Mbps. For 60s test at 20Mbps, 10ms delay with hw.igb.num_queues=3D2 speed is 18.0619Mbps. and without it the speed is 18.12Mbps. Regards, Niu Zhixiong =EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF= =BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D kaiaixi@gmail.com On Mon, Aug 11, 2014 at 7:50 PM, Michael Tuexen < Michael.Tuexen@lurchi.franken.de> wrote: > On 11 Aug 2014, at 09:32, Niu Zhixiong <kaiaixi@gmail.com> wrote: > > > Thanks for your reminding. I tried hw.igb.num_queues=3D2 just now. But, > the throughput is still slow. And When I tested same things in my Virtual > machine-based environment(use Virtio), the throughput is similar(SCTP is = 2x > than TCP). > So is the curve still the same or is it now constantly half of the SCTP > throughput which > was almost constant for different RTTs... > > Best regards > Michael > > > > Regards, > > Niu Zhixiong > > =EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC= =8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D=EF=BC=8D > > kaiaixi@gmail.com > > > > > > On Mon, Aug 11, 2014 at 3:08 PM, Eggert, Lars <lars@netapp.com> wrote: > > Hi, > > > > On 2014-8-10, at 5:48, Niu Zhixiong <kaiaixi@gmail.com> wrote: > > > I am using Intel I350-T4 NIC. > > > > igb driver? > > > > I've been having weird issues with this driver under 10-RELEASE, too. O= n > one machine, I had to limit hw.igb.num_queues=3D2 in order to get any sor= t of > useful connectivity. On another machine, I had to severely bump > kern.ipc.nmbclusters & friends. I'm not sure this is the issue here, sinc= e > SCTP seems to be working OK, but I'm not trusting igb NICs at the moment. > > > > Lars > > > >
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