From owner-freebsd-net@FreeBSD.ORG Wed Nov 21 02:23:28 2012 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3FA135B8 for ; Wed, 21 Nov 2012 02:23:28 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-we0-f182.google.com (mail-we0-f182.google.com [74.125.82.182]) by mx1.freebsd.org (Postfix) with ESMTP id BE7B18FC0C for ; Wed, 21 Nov 2012 02:23:27 +0000 (UTC) Received: by mail-we0-f182.google.com with SMTP id u54so1905515wey.13 for ; Tue, 20 Nov 2012 18:23:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=B9XiQ4U7CFgPh87/eg1YfbZKbLDWeSCsfswaZ6P4g0g=; b=y5wc9NnofBc3+qHcEpxZb3VC5Q7fnEETVu3xD5Q5PxO0wyG6PmS07nQsKprp1lxP4q 3Bo49qYD7XMLam6Rvm4K6IQBi7uPlBRi/1zUR8E04tbT3M4gwdoZUAHmyS95xH5R6xI3 Krzl1m2jTtBdzVUD84JhbPLvB9Uy1ZKuqDybgE0fWIpWZ9tZbhIFmJTmp8vaD14I7Vt+ fZXyYRiEjPxOgR7zYflHzSAbj2jr/om3IFDIXfQkSzUbz6gJ0XzwSBLo78n5g/UTp22y Ozpl7WP/6DOS7CZqSVsUhj8IH7oYPgy6A36Le927BngUpqWFMBDag5w0Msnpuwbd3jJH 3vBQ== MIME-Version: 1.0 Received: by 10.180.94.161 with SMTP id dd1mr17373835wib.17.1353464606453; Tue, 20 Nov 2012 18:23:26 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.216.21.211 with HTTP; Tue, 20 Nov 2012 18:23:26 -0800 (PST) In-Reply-To: <250266404.35502.1353464214924@238ae4dab3b4454b88aea4d9f7c372c1.nuevasync.com> References: <1353448328.76219.YahooMailClassic@web121602.mail.ne1.yahoo.com> <50AC08EC.8070107@mu.org> <832757660.33924.1353460119408@238ae4dab3b4454b88aea4d9f7c372c1.nuevasync.com> <250266404.35502.1353464214924@238ae4dab3b4454b88aea4d9f7c372c1.nuevasync.com> Date: Tue, 20 Nov 2012 18:23:26 -0800 X-Google-Sender-Auth: cZTpgQ457TdiP_aaTVhEaqklnYg Message-ID: Subject: Re: FreeBSD boxes as a 'router'... From: Adrian Chadd To: khatfield@socllc.net Content-Type: text/plain; charset=ISO-8859-1 Cc: Barney Cordoba , Jim Thompson , Alfred Perlstein , "freebsd-net@freebsd.org" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Nov 2012 02:23:28 -0000 The next time you have a chance to do high PPS tests, please compile in KTR and take a schedgraph trace or two. Read the schedgraph.py source in /usr/src/tools/ for a quick overview. It'd be nice to have a public record somewhere of this issue diagnosed. It may have just been some of the really odd edge case behaviour the intel 10GE NICs did (at least, before scottl and the netflix team were let at it.) Adrian