Date: Mon, 11 Aug 2014 16:52:12 -0700 From: hiren panchasara <hiren.panchasara@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>, Niu Zhixiong <kaiaixi@gmail.com>, Bill Yuan <bycn82@gmail.com> Subject: Re: A problem on TCP in High RTT Environment. Message-ID: <CALCpEUEzBb1wCJVONNtbKnt_ZTpoPcup7O9P_03jkJCHRiAVBg@mail.gmail.com> In-Reply-To: <5D3CBFDC-362E-4DB6-A132-BA842EF5B1B2@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> <0CF85443-26AC-4931-9D00-3396C18C7690@lurchi.franken.de> <7A4120EE-60F3-4D32-89C4-C694B8DFEAE4@netapp.com> <5E8A6382-7096-495A-907C-86CE26A163A2@lurchi.franken.de> <CC9987A3-4608-4513-9D46-B81369CB8354@netapp.com> <5D3CBFDC-362E-4DB6-A132-BA842EF5B1B2@lurchi.franken.de>
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On Mon, Aug 11, 2014 at 12:59 PM, Michael Tuexen <Michael.Tuexen@lurchi.franken.de> wrote: > On 11 Aug 2014, at 21:40, Eggert, Lars <lars@netapp.com> wrote: > >> Hi, >> >> On 2014-8-11, at 21:27, Michael Tuexen <Michael.Tuexen@lurchi.franken.de> wrote: >>> On 11 Aug 2014, at 14:12, Eggert, Lars <lars@netapp.com> wrote: >>>> 544/57/8194 requests for mbufs denied (mbufs/clusters/mbuf+clusters) >>> I guess the above is the problem. The card wants a lot of mbufs... >>> So the problem should go away if you increase the number of mbufs/clusters, >>> which means no requests are denied and you don't experience any performance >>> issue. >> >> And I have six of those ports in that box... >> >> So I bump kern.ipc.nmbclusters? Any additional sysctls I should bump? > If I remember correctly, I increased > kern.ipc.nmbufs and kern.ipc.nmbclusters in /boot/loader.conf I believe, you just need to set kern.ipc.nmbclusters (max mbuf clusters allowed) and kern.ipc.nmbufs (max mbufs allowed) should be adjusted based on that. cheers, Hiren
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