From owner-freebsd-hackers Tue Jun 30 18:19:08 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA20899 for freebsd-hackers-outgoing; Tue, 30 Jun 1998 18:19:08 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from redfish.go2net.com (redfish.go2net.com [207.178.55.5]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id SAA20791; Tue, 30 Jun 1998 18:18:20 -0700 (PDT) (envelope-from marcs@go2net.com) Received: from marcs by redfish.go2net.com with smtp (Exim 1.82 #2) id 0yrBVu-0002PH-00; Tue, 30 Jun 1998 18:16:46 -0700 Date: Tue, 30 Jun 1998 18:16:46 -0700 (PDT) From: Marc Slemko X-Sender: marcs@redfish To: Yee Man Chan cc: freebsd-hackers@FreeBSD.ORG, questions@FreeBSD.ORG Subject: Re: something is wrong with freebsd (fwd) In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, 30 Jun 1998, Yee Man Chan wrote: > Hi, > > My supervisor sends me the result he collected using tcpdump when > running my client-server program post before. Does anyone have an idea of > what's going on? > > > Thanks. > Yee Man > > P.S. If anyone can't get the source code I posted before. Please don't > hesitate to request it directly from me. > > Msg from my supervisor: > > Here're the tcpdump of the client and server on freebsd only, sun only, > or one on each. You can see that freebsd consistently splits up pkts > of size 101 to 207 bytes into 2 pkts, but sending pkts of size 208 to > maxseg bytes in one pkt. Known problem; wasn't introduced by FreeBSD code, but hasn't been fixed either. Should be in the archives somewhere. Search for a "why 100 byte TCP segments" thread. There is a half page on it in Stevens vol 3(?) or something, not at home now can't check. It has to do with how it shoves things into mbufs and mbuf clusters. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message