From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-01-iad.dyndns.com (mxout-055-iad.mailhop.org [216.146.32.55]) by lists.bufferbloat.net (Postfix) with ESMTP id 053A02E015C for ; Sat, 12 Mar 2011 14:21:59 -0800 (PST) Received: from scan-02-iad.mailhop.org (scan-02-iad.local [10.150.0.207]) by mail-01-iad.dyndns.com (Postfix) with ESMTP id 7FEFB71A1E for ; Sat, 12 Mar 2011 22:22:00 +0000 (UTC) X-Spam-Score: -8.0 (--------) X-Mail-Handler: MailHop by DynDNS X-Originating-IP: 171.71.176.70 Received: from sj-iport-1.cisco.com (sj-iport-1.cisco.com [171.71.176.70]) by mail-01-iad.dyndns.com (Postfix) with ESMTP id 0B8317193D for ; Sat, 12 Mar 2011 22:21:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=fred@cisco.com; l=429; q=dns/txt; s=iport; t=1299968519; x=1301178119; h=subject:mime-version:from:in-reply-to:date:cc:message-id: references:to:content-transfer-encoding; bh=60Hux3t/Cx9cQZhmacyx2GxXLhm5MclP7V6ufL4+24U=; b=RzeOp1kYuk1htXUc5xvwrK/Wi1bgIiNOz0xD0aKZ2kr9chQIUCRrDOo7 uMZ9ZrhYbx4bnE0jsdOQvne32lsFru4p+j0CPpiXNy6JUZ+QOVXmHY3ky a6ERpwalwBZqfN2Agi2kNRHeZbdjqImE0tX11+iNhLqAJN7xuoo7+kWTx I=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvsEABKBe02tJXG+/2dsb2JhbACmRHelL5sqhWIEhSuHJ4NO X-IronPort-AV: E=Sophos;i="4.62,308,1297036800"; d="scan'208";a="413950976" Received: from rcdn-core2-3.cisco.com ([173.37.113.190]) by sj-iport-1.cisco.com with ESMTP; 12 Mar 2011 22:21:57 +0000 Received: from stealth-10-32-244-219.cisco.com (stealth-10-32-244-219.cisco.com [10.32.244.219]) by rcdn-core2-3.cisco.com (8.14.3/8.14.3) with ESMTP id p2CMLqhL024127; Sat, 12 Mar 2011 22:21:57 GMT Received: from [127.0.0.1] by stealth-10-32-244-219.cisco.com (PGP Universal service); Sat, 12 Mar 2011 14:21:57 -0800 X-PGP-Universal: processed; by stealth-10-32-244-219.cisco.com on Sat, 12 Mar 2011 14:21:57 -0800 Mime-Version: 1.0 (Apple Message framework v1082) From: Fred Baker In-Reply-To: <16808EAB-2F52-4D32-8A8C-2AE09CD4D103@gmail.com> Date: Sat, 12 Mar 2011 14:21:42 -0800 Message-Id: <08621605-30D1-4916-82EE-A4219A653ACD@cisco.com> References: <16808EAB-2F52-4D32-8A8C-2AE09CD4D103@gmail.com> To: Jonathan Morton X-Mailer: Apple Mail (2.1082) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] Measuring latency-under-load consistently X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Mar 2011 22:22:00 -0000 At the risk of sounding like someone mentioning a product, let me = mention a product. This assumes, of course, that you're using Cisco = equipment. But it allows you to measure delay (how long does it take to = get from here to there), jitter (first derivative of delay/dt), and = packet loss. = http://www.cisco.com/en/US/tech/tk869/tk769/technologies_white_paper09186a= 00801b1a1e.shtml#definedelayjitterpacketloss=