Date: Mon, 11 Aug 2014 09:17:51 +0200 From: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> To: "Eggert, Lars" <lars@netapp.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, John-Mark Gurney <jmg@funkthat.com>, Niu Zhixiong <kaiaixi@gmail.com>, Bill Yuan <bycn82@gmail.com> Subject: Re: A problem on TCP in High RTT Environment. Message-ID: <0CF85443-26AC-4931-9D00-3396C18C7690@lurchi.franken.de> In-Reply-To: <17A804F3-BEA6-46F4-887F-B68750618FD9@netapp.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>
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On 11 Aug 2014, at 09:08, 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. Was there any suspicious output provided by netstat -m when the problems = occur? Best regards Michael >=20 > Lars
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