From owner-freebsd-current Mon Aug 30 14:29:22 1999 Delivered-To: freebsd-current@freebsd.org Received: from gndrsh.dnsmgr.net (GndRsh.dnsmgr.net [198.145.92.4]) by hub.freebsd.org (Postfix) with ESMTP id 2D07314BCC for ; Mon, 30 Aug 1999 14:29:18 -0700 (PDT) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: (from freebsd@localhost) by gndrsh.dnsmgr.net (8.9.3/8.9.3) id OAA67008; Mon, 30 Aug 1999 14:27:53 -0700 (PDT) (envelope-from freebsd) From: "Rodney W. Grimes" Message-Id: <199908302127.OAA67008@gndrsh.dnsmgr.net> Subject: Re: HEADS UP In-Reply-To: <19990830162125.52517@right.PCS> from Jonathan Lemon at "Aug 30, 1999 04:21:25 pm" To: jlemon@americantv.com (Jonathan Lemon) Date: Mon, 30 Aug 1999 14:27:53 -0700 (PDT) Cc: current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > I've just committed the revised TCP timer code. There are some > user visible changes: > > User visible TCP timers are now in units of the system clock > (10ms for the i386), not those of the slowtimeout (500ms). So > if you have customized one of these values, (e.g.: net.inet.tcp.keepintvl), > you'll need to multiply it appropriately to keep the same interval. > > Also, some new sysctls have been added: I didn't think I would ever see this!! Good job, hats off to you and assoctiates! > > net.inet.tcp.delacktime: 20 > Specifies the timeout for delayed acks (200ms). > net.inet.tcp.slowstart_flightsize: 1 > Specifies how many packets are included in the initial > slow-start flight. Setting this value to 0 will probably > result in a non-working system. Choosing a high value > would be considered antisocial. > net.inet.tcp.local_slowstart_flightsize: 65535 > Same as above, but only applies to slowstart on "local" > networks. Note that the flightsize is constrained by > the receiver's advertised window size. One question though, how is ``local'' defined? -- Rod Grimes - KD7CAX - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message