From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ej1-x62e.google.com (mail-ej1-x62e.google.com [IPv6:2a00:1450:4864:20::62e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 0F17A3B29D; Wed, 1 Jun 2022 09:42:07 -0400 (EDT) Received: by mail-ej1-x62e.google.com with SMTP id y19so3858028ejq.6; Wed, 01 Jun 2022 06:42:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :content-transfer-encoding; bh=Gr7JKwafUXumRA8wXW9+07CKxGI+nwxIykQcgG1AlsM=; b=Y2LpNAcp8Tf11e+w76HEa/XCcHtZ2x+H1QhadA4+IqZ/W4MPfjUuxT/iSAtQKBnBQz idEiNBzHbssIdPpx2rICfS4W0B9JboTBoiJnVYtZM0kdUsQu5MMJxZgnWoV2RfFNw+eQ UzRrHD5O7FeW8sGZ78UQPef2x901eJkti10IepV95TE3yuLQqNNV6bjvNt0A6kXR4Txz PL/N1Edj2GQqe27xlNyG8pK/4BYbZ9WbBxJFjCrfWcPJvdbsxJus5Cykx6OWvaWwW4Et 9DomWYMRric5UBOCx5ophMupwlFPjVrRkAHHNVJrmmVdYxp17eVunUS+x7vvgkqnIxFa edYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-transfer-encoding; bh=Gr7JKwafUXumRA8wXW9+07CKxGI+nwxIykQcgG1AlsM=; b=hwcvFoLPSH2k4tHmYkNe3eZ0q7CGL/98DC3YR/uRMO3Z2xXJ8hh621h9uASwGE2xYC /oD7QChc1zOdJXWO2uJYtoy2UtSmuY1w0/vtBC3eG4b3MfX1nHRxMaowB9maz2ku1MXl uZKeWLpI3sApuOOdb75hem6C+xPLJ651p39aRGnKhCT/6D5BK9EiB4bFt3+32+Lv0zCC 6X07aHPvm4G4TovLRt6WbPphMG1j0x4J5dMMlLQTxu8Z+RzuJ05G6z/306Cfa4J/MchM p4dakIIh+HXOXQbYLUOB9GrPwz+BJjyTZBj9GRSHDJCjS97+tIjMcpnwTxqmseTIgDPW Cj5A== X-Gm-Message-State: AOAM533SVU8otjli9om+WS4i5qI4GdQ8s0U0dmQoebddLMPSrJzEK4OJ WtyuGdRew/zmOyT/KITJ/jx/e0Mkt+QziqhgLM3lNKnWgEo= X-Google-Smtp-Source: ABdhPJxwyOejOxcrJwdApEK4Q88IvzvHsUMDFVMmP1+froEFim+LPrwtdG0MncxTbelcubIF3lQDAk7Frxn6Q05rJTs= X-Received: by 2002:a17:906:25d8:b0:6fe:9f11:3906 with SMTP id n24-20020a17090625d800b006fe9f113906mr53154814ejb.538.1654090925666; Wed, 01 Jun 2022 06:42:05 -0700 (PDT) MIME-Version: 1.0 References: <1D4ED354-777D-4601-BBE9-D1AAA886B16C@apple.com> <13D15A8D-7C7A-4B04-9D0D-DFAFB49799C6@apple.com> In-Reply-To: <13D15A8D-7C7A-4B04-9D0D-DFAFB49799C6@apple.com> From: Dave Taht Date: Wed, 1 Jun 2022 06:41:52 -0700 Message-ID: To: bloat , Rpm Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Bloat] Fwd: Ookla Speedtest app on iPad with Thunderbolt Ethernet X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Jun 2022 13:42:07 -0000 ---------- Forwarded message --------- From: Stuart Cheshire Date: Tue, May 31, 2022 at 10:33 AM Subject: Ookla Speedtest app on iPad with Thunderbolt Ethernet To: Dave T=C3=A4ht , Sasha Leitmann , Matt Mathis , Jonathan Foulkes , Christoph Paasch I got hold of an iPad with Thunderbolt to try the new Ookla Speedtest app with Gigabit Ethernet. Here are my results. Download Upload Idle Idle Download Download Upload Upload Network adapter SQM Throughput Throughput Ping Ping Max Ping Ping Max Ping Ping Max Apple USB 2 No 95 35.3 17 21 72 459 58 1668 Moshi USB 3 No 917 39.3 16 19 84 281 22 1007 Mokin USB C No 910 36.2 16 19 105 374 62 764 StarTech USB C No 890 39.0 16 20 154 744 25 852 Apple USB 2 Yes 85 20.9 17 19 10 39 12 22 Moshi USB 3 Yes 689 20.9 15 20 10 46 12 21 Mokin USB C Yes 723 21.1 16 19 10 30 10 19 StarTech USB C Yes 705 20.2 17 19 10 34 11 18 None (Wi-Fi) No 425 37.4 18 30 159 638 63 1276 None (Wi-Fi) Yes 204 21.2 18 24 22 49 14 127 The columns to pay attention to are the Download and Upload Ping times. For the Ethernet connections, when turning on SQM: Download Ping goes from around 100 ms to around 10 ms, a 10x improvemen= t. Download Ping Max goes from around 400 ms to around 40 ms, a 10x improvemen= t. Upload Ping goes from around 40 ms to around 12 ms, a 3x improvement= . Upload Ping Max goes from around 1000 ms to around 20 ms, a 50x improvement= . The figures for Wi-Fi are, unsurprisingly, a little worse overall than wired Ethernet, but still show 10x improvement when SQM is used. The reduction in delay, particularly in the upload direction, is quite dram= atic. Also bear in mind that I=E2=80=99m using Comcast cable modem service here, = and Comcast has already deployed better delay management than most ISPs. For details, see =E2=80=9CImproving Latency with Active Queue Management (A= QM) During COVID-19=E2=80=9D People with less advanced ISPs would likely see even bigger gains from applying competent SQM. Stuart Cheshire P.S. I set my artificial throughput limits conservatively low to be sure I was seeing the SQM queue management effects, so there=E2=80=99s a noticeable reduction in throughput. In a real deployment where the Cable Modem and CMTS are doing smart queue management themselves you wouldn=E2=80=99t see this reduction in throughput because the cable hardwar= e has direct knowledge of the instantaneous rates and queue sizes. When I=E2=80=99m doing this artificially with the UDM Pro, I have to work with pessimistic worst-case throughput limits to be certain I won=E2=80=99t accidentally end up with a queue building up elsewhere. --=20 FQ World Domination pending: https://blog.cerowrt.org/post/state_of_fq_code= l/ Dave T=C3=A4ht CEO, TekLibre, LLC