Date: Tue, 12 Aug 2014 10:43:02 +0000 From: "Eggert, Lars" <lars@netapp.com> To: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, John-Mark Gurney <jmg@funkthat.com>, Niu Zhixiong <kaiaixi@gmail.com>, hiren panchasara <hiren.panchasara@gmail.com>, Bill Yuan <bycn82@gmail.com> Subject: Re: A problem on TCP in High RTT Environment. Message-ID: <56F2C841-6192-4C64-92B0-18BF12D07EAB@netapp.com> In-Reply-To: <45B75806-ECE3-43D0-A75B-1B71A5969234@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> <CALCpEUEzBb1wCJVONNtbKnt_ZTpoPcup7O9P_03jkJCHRiAVBg@mail.gmail.com> <E9FE9F32-9079-463E-BB47-5E62E61F31BC@netapp.com> <45B75806-ECE3-43D0-A75B-1B71A5969234@lurchi.franken.de>
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--Apple-Mail=_6D45AB0D-ECFA-49AD-AC44-649F95916F0E Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 2014-8-12, at 12:31, Michael Tuexen = <Michael.Tuexen@lurchi.franken.de> wrote: > On 12 Aug 2014, at 10:02, Eggert, Lars <lars@netapp.com> wrote: >> I bumped kern.ipc.nmbclusters by a factor of 100 (from 2036224 to = 203622400). As Hiren said, kern.ipc.nmbufs auto-adjusted (from 13031835 = to 205111860). > Just to double check: You changed it in /boot/loader.conf, right? Yep, and it has taken effect: # sysctl -a | egrep 'nmb|mbuf' kern.ipc.maxmbufmem: 16680744960 kern.ipc.nmbclusters: 203622400 kern.ipc.nmbjumbop: 1018111 kern.ipc.nmbjumbo9: 904986 kern.ipc.nmbjumbo16: 678740 kern.ipc.nmbufs: 205111860 net.inet.sctp.max_chained_mbufs: 5 >> I just noticed that the total "mbufs in use" didn't seem to have = increase when I did the 100x scaling of kern.ipc.nmbclusters (and = kern.ipc.nmbufs auto-adjusted). Neither did "bytes allocated to = network". Is that expected? > I don't think so... Am I hitting some other kernel limit on how much memory in total the = stack can use? Lars --Apple-Mail=_6D45AB0D-ECFA-49AD-AC44-649F95916F0E Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- iQCVAwUBU+nv1dZcnpRveo1xAQI0/AP+MwQU7XgTj+ppVbrmflFiQJeL27NrE+pb Y2qxEqzpVEHu6Qzat5at7lMkjeiu88kGL1GNwi5nJeylNgfUYIA9mX+5XaGk1itR /IHtJXd/2w6GQtK1ryFM/u2tUGPYLzvcxJoy+YLMgGyfaiLLKqVbN8LVCLZEzXt5 QBjJmKkUmY4= =Rm5E -----END PGP SIGNATURE----- --Apple-Mail=_6D45AB0D-ECFA-49AD-AC44-649F95916F0E--
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