From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bobcat.rjmcmahon.com (bobcat.rjmcmahon.com [45.33.58.123]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id CB7FD3B29D for ; Tue, 27 Feb 2024 17:00:56 -0500 (EST) Received: from mail.rjmcmahon.com (bobcat.rjmcmahon.com [45.33.58.123]) by bobcat.rjmcmahon.com (Postfix) with ESMTPA id 244551B25E; Tue, 27 Feb 2024 14:00:56 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 bobcat.rjmcmahon.com 244551B25E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rjmcmahon.com; s=bobcat; t=1709071256; bh=v9gZdYqnyBNuhFlHVE4S1UDr2VU1GkCbWp9SV7eaUAk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=gpkHahZpi5iL0JVYOCj3e9x2cw6Hca69W2EchA2ZrOB/0Mf7wZuMaQhQXK4W7ut3w E47nqyZHrFabzpEfnSp1kSPBjKXWzhHPQxuF07F7OT+eAZXE9luSLXcJmr7aeZXBxR 08dXQ22Dd79oXu04tSHUCOiNGIMhNPIxvNtGtvN4= MIME-Version: 1.0 Date: Tue, 27 Feb 2024 14:00:56 -0800 From: rjmcmahon To: =?UTF-8?Q?Network_Neutrality_is_back!_Let=C2=B4s_make_the_technical_a?= =?UTF-8?Q?spects_heard_this_time!?= In-Reply-To: <766106EC-9F2B-4440-B7A6-5AA483EF45F0@comcast.com> References: <766106EC-9F2B-4440-B7A6-5AA483EF45F0@comcast.com> Message-ID: <69133641c96091ed047e6bf11a2ff5d7@rjmcmahon.com> X-Sender: rjmcmahon@rjmcmahon.com Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: [NNagain] The FCC 2024 Section 706 Report, GN Docket No. 22-270 is out! X-BeenThere: nnagain@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: =?utf-8?q?Network_Neutrality_is_back!_Let=C2=B4s_make_the_technical_aspects_heard_this_time!?= List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Feb 2024 22:00:56 -0000 > Interesting blog post on the latency part at > https://broadbandbreakfast.com/untitled-12/. > > Looking at the FCC draft report, page 73, Figure 24 – I find it sort > of ridiculous that the table describes things as “Low Latency > Service” available or not. That is because they seem to really > misunderstand the notion of working latency. The table instead seems > to classify any network with idle latency <100 ms to be low latency > – which as Dave and others close to bufferbloat know is silly. Lots > of these networks that are in this report classified as low latency > would in fact have working latencies of 100s to 1,000s of milliseconds > – far from low latency. > > I looked at FCC MBA platform data from the last 6 months and here are > the latency under load stats, 99th percentile for a selection of ten > ISPs: > ISP A 2470 ms > > ISP B 2296 ms > > ISP C 2281 ms > > ISP D 2203 ms > > ISP E 2070 ms > > ISP F 1716 ms > > ISP G 1468 ms > > ISP H 965 ms > > ISP I 909 ms > > ISP J 896 ms > > Jason It does seem like there is a lot of confusion around idle latency vs working latency. Another common error is to conflate round trip time as two "one way delays." OWD & RTT are different metrics and both have utility. (all of this, including working-loads, is supported in iperf 2 - https://iperf2.sourceforge.io/iperf-manpage.html - so there is free tooling out there that can help.) Bob