From owner-svn-src-stable-9@FreeBSD.ORG Fri Jul 5 15:30:03 2013 Return-Path: Delivered-To: svn-src-stable-9@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 0841BB72; Fri, 5 Jul 2013 15:30:03 +0000 (UTC) (envelope-from andre@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) by mx1.freebsd.org (Postfix) with ESMTP id DF372124F; Fri, 5 Jul 2013 15:30:02 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id r65FU2sR076017; Fri, 5 Jul 2013 15:30:02 GMT (envelope-from andre@svn.freebsd.org) Received: (from andre@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id r65FU2So076016; Fri, 5 Jul 2013 15:30:02 GMT (envelope-from andre@svn.freebsd.org) Message-Id: <201307051530.r65FU2So076016@svn.freebsd.org> From: Andre Oppermann Date: Fri, 5 Jul 2013 15:30:02 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r252792 - stable/9/share/man/man7 X-SVN-Group: stable-9 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-9@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: SVN commit messages for only the 9-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Jul 2013 15:30:03 -0000 Author: andre Date: Fri Jul 5 15:30:02 2013 New Revision: 252792 URL: http://svnweb.freebsd.org/changeset/base/252792 Log: MFC r244039: Remove outdated reference to tcp inflight tuning. Modified: stable/9/share/man/man7/tuning.7 Directory Properties: stable/9/ (props changed) stable/9/share/ (props changed) stable/9/share/man/ (props changed) stable/9/share/man/man7/ (props changed) Modified: stable/9/share/man/man7/tuning.7 ============================================================================== --- stable/9/share/man/man7/tuning.7 Fri Jul 5 15:26:12 2013 (r252791) +++ stable/9/share/man/man7/tuning.7 Fri Jul 5 15:30:02 2013 (r252792) @@ -23,7 +23,7 @@ .\" .\" $FreeBSD$ .\" -.Dd October 16, 2010 +.Dd December 8, 2012 .Dt TUNING 7 .Os .Sh NAME @@ -666,52 +666,6 @@ the sysctl rather than disable delayed acks. .Pp The -.Va net.inet.tcp.inflight.enable -sysctl turns on bandwidth delay product limiting for all TCP connections. -The system will attempt to calculate the bandwidth delay product for each -connection and limit the amount of data queued to the network to just the -amount required to maintain optimum throughput. -This feature is useful -if you are serving data over modems, GigE, or high speed WAN links (or -any other link with a high bandwidth*delay product), especially if you are -also using window scaling or have configured a large send window. -If you enable this option, you should also be sure to set -.Va net.inet.tcp.inflight.debug -to 0 (disable debugging), and for production use setting -.Va net.inet.tcp.inflight.min -to at least 6144 may be beneficial. -Note however, that setting high -minimums may effectively disable bandwidth limiting depending on the link. -The limiting feature reduces the amount of data built up in intermediate -router and switch packet queues as well as reduces the amount of data built -up in the local host's interface queue. -With fewer packets queued up, -interactive connections, especially over slow modems, will also be able -to operate with lower round trip times. -However, note that this feature -only affects data transmission (uploading / server-side). -It does not -affect data reception (downloading). -.Pp -Adjusting -.Va net.inet.tcp.inflight.stab -is not recommended. -This parameter defaults to 20, representing 2 maximal packets added -to the bandwidth delay product window calculation. -The additional -window is required to stabilize the algorithm and improve responsiveness -to changing conditions, but it can also result in higher ping times -over slow links (though still much lower than you would get without -the inflight algorithm). -In such cases you may -wish to try reducing this parameter to 15, 10, or 5, and you may also -have to reduce -.Va net.inet.tcp.inflight.min -(for example, to 3500) to get the desired effect. -Reducing these parameters -should be done as a last resort only. -.Pp -The .Va net.inet.ip.portrange.* sysctls control the port number ranges automatically bound to TCP and UDP sockets.