From owner-freebsd-hackers Mon Sep 10 13:32:12 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from bdr-xcon.matchlogic.com (mail.matchlogic.com [205.216.147.127]) by hub.freebsd.org (Postfix) with ESMTP id 941DD37B401 for ; Mon, 10 Sep 2001 13:32:08 -0700 (PDT) Received: by mail.matchlogic.com with Internet Mail Service (5.5.2653.19) id ; Mon, 10 Sep 2001 14:31:59 -0600 Message-ID: <5FE9B713CCCDD311A03400508B8B30130828F421@bdr-xcln.corp.matchlogic.com> From: Charles Randall To: 'Jonathan Lemon' , Julian Elischer Cc: kent@erix.ericsson.se, hackers@freebsd.org Subject: RE: How to force small TCP packets? Date: Mon, 10 Sep 2001 14:31:57 -0600 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Out of curiosity, can ipfw+dummynet do something like this? -----Original Message----- From: Jonathan Lemon [mailto:jlemon@flugsvamp.com] Sent: Monday, September 10, 2001 1:35 PM To: Julian Elischer Cc: Jonathan Lemon; kent@erix.ericsson.se; hackers@freebsd.org Subject: Re: How to force small TCP packets? On Mon, Sep 10, 2001 at 12:43:15PM -0700, Julian Elischer wrote: > just set the MTU on the sender to something really small (120 byres) No. The data gets coalesced in the socket receive buffer on the other end, remember? So depending on how fast things are running, there may or may not be enough data present to satisfy the "100 byte" read, which is proably the edge case he is attempting to debug. -- Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message