From owner-freebsd-net@FreeBSD.ORG Sat Nov 29 20:47:00 2008 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 734A7106564A for ; Sat, 29 Nov 2008 20:47:00 +0000 (UTC) (envelope-from dwmalone@maths.tcd.ie) Received: from salmon.maths.tcd.ie (salmon.maths.tcd.ie [IPv6:2001:770:10:300::86e2:510b]) by mx1.freebsd.org (Postfix) with SMTP id CE1D28FC1B for ; Sat, 29 Nov 2008 20:46:59 +0000 (UTC) (envelope-from dwmalone@maths.tcd.ie) Received: from localhost ([127.0.0.1] helo=maths.tcd.ie) by salmon.maths.tcd.ie with SMTP id ; 29 Nov 2008 20:46:56 +0000 (GMT) To: Venkat Venkatsubra In-reply-to: Your message of "Sat, 29 Nov 2008 12:39:49 PST." <10716.94191.qm@web58304.mail.re3.yahoo.com> X-Request-Do: Date: Sat, 29 Nov 2008 20:46:53 +0000 From: David Malone Message-ID: <200811292046.aa42834@salmon.maths.tcd.ie> Cc: Rui Paulo , freebsd-net@freebsd.org, Kevin Oberman Subject: Re: FreeBSD Window updates X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 29 Nov 2008 20:47:00 -0000 > Each of these 5 window updates are sent after the apps completed the read > that it issued, what's the buffer size the apps is passing to the read? > If it is small, could that be increased? I'm not actually sure - the app is iperf. The window scaling factor is 8 here I think. > But I agree with you that there is room for optimizing sending of these > window updates. Any feeling for which would be the better fix? David.