Date: Tue, 12 Aug 2014 12:31:15 +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>, hiren panchasara <hiren.panchasara@gmail.com>, Bill Yuan <bycn82@gmail.com> Subject: Re: A problem on TCP in High RTT Environment. Message-ID: <45B75806-ECE3-43D0-A75B-1B71A5969234@lurchi.franken.de> In-Reply-To: <E9FE9F32-9079-463E-BB47-5E62E61F31BC@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> <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@m ail.gmail.com> <E9FE9F32-9079-463E-BB47-5E62E61F31BC@netapp.com>
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On 12 Aug 2014, at 10:02, Eggert, Lars <lars@netapp.com> wrote: > Hi, >=20 > On 2014-8-12, at 1:52, hiren panchasara <hiren.panchasara@gmail.com> = wrote: >> On Mon, Aug 11, 2014 at 12:59 PM, Michael Tuexen >> <Michael.Tuexen@lurchi.franken.de> wrote: >>> If I remember correctly, I increased >>> kern.ipc.nmbufs and kern.ipc.nmbclusters in /boot/loader.conf >>=20 >> 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. >=20 > 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? >=20 > However, I still see "requests for mbufs denied" immediately after = reboot. >=20 > root@laurel:~ # netstat -m > 12280/1580/13860 mbufs in use (current/cache/total) > 12279/827/13106/203622400 mbuf clusters in use = (current/cache/total/max) > 12279/819 mbuf+clusters out of packet secondary zone in use = (current/cache) > 0/3/3/1018111 4k (page size) jumbo clusters in use = (current/cache/total/max) > 0/0/0/301662 9k jumbo clusters in use (current/cache/total/max) > 0/0/0/169685 16k jumbo clusters in use (current/cache/total/max) > 27628K/2061K/29689K bytes allocated to network (current/cache/total) > 253/5481/12473 requests for mbufs denied = (mbufs/clusters/mbuf+clusters) > 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters) > 0/0/0 requests for jumbo clusters delayed (4k/9k/16k) > 0/0/0 requests for jumbo clusters denied (4k/9k/16k) > 0 requests for sfbufs denied > 0 requests for sfbufs delayed > 0 requests for I/O initiated by sendfile >=20 > 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... Best regards Michael >=20 > Lars
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