Date: Mon, 11 Aug 2014 13:50:24 +0200 From: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> To: Niu Zhixiong <kaiaixi@gmail.com> 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: <31C0C883-A847-4746-96FA-FE3148B4BD31@lurchi.franken.de> In-Reply-To: <CAOENNMCbY3L%2BCXn1DFSwhUtMb7xXVeEhPWYLHdy4c8A%2BStPNOA@mail.gmail.com> 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>
next in thread | previous in thread | raw e-mail | index | archive | help
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 >=20 > 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 >=20 >=20 > On Mon, Aug 11, 2014 at 3:08 PM, Eggert, Lars <lars@netapp.com> wrote: > Hi, >=20 > On 2014-8-10, at 5:48, Niu Zhixiong <kaiaixi@gmail.com> wrote: > > I am using Intel I350-T4 NIC. >=20 > igb driver? >=20 > I've been having weird issues with this driver under 10-RELEASE, too. = On one machine, I had to limit hw.igb.num_queues=3D2 in order to get any = sort of useful connectivity. On another machine, I had to severely bump = kern.ipc.nmbclusters & friends. I'm not sure this is the issue here, = since SCTP seems to be working OK, but I'm not trusting igb NICs at the = moment. >=20 > Lars >=20
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?31C0C883-A847-4746-96FA-FE3148B4BD31>