From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io1-xd34.google.com (mail-io1-xd34.google.com [IPv6:2607:f8b0:4864:20::d34]) (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 3DC9F3B29E; Mon, 13 Dec 2021 09:47:23 -0500 (EST) Received: by mail-io1-xd34.google.com with SMTP id p23so18742334iod.7; Mon, 13 Dec 2021 06:47:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=HEwnowFPvNIAs0ZoPdfsgPXP5iMhpuFRq5R1eRSvgIs=; b=Pct0pJTaRaJXiPf8qwBI5pGgsukAR/Fmhk6mFpcowCZTRkuF1m528YONBDmtst3IeJ TgbOdu67BxrUFXnwsaUq0wvKEKaUR1qCr/Vv4q7bSpyXPIQ4nYG09d+5fq8w0EM5BlVB kxowXlgto+X0+ZsK9xqOg5KZ2h+SLcDPhcsAUkpiruDzWupMrUOw5ckGOGA5o8l3WPPu xgK7MHJxOZ+QunMdB+1yhNsp82uzfI1LCTT9wfTzz1z6sBAuadDHXrr5coQ8N1GtZERs XPJASw4bpnlWyadGGAmKgJQRbHyQfNo5mgaq7bovZzVWvmCDuzzDXvhhX+sycZwi9Fkk mAuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=HEwnowFPvNIAs0ZoPdfsgPXP5iMhpuFRq5R1eRSvgIs=; b=ce/lsuvhCnYMNSvwsTCABVVsLlgOXghHmj3pLXXNr/D2MwO2FDTojv1zAzWxPDg7GF 60zXVO3Ib3eXyXBUY3qjKqhgd2g2gPx94xmQeKUqeQMXSzSTHwaxIFb02TbJX4maEohj waee9MEH4WvtyiJuhVaHOIfZds9hUSUXHL5oR278y+xAFgU962nc+OgrK95FlOUuF3VE mGatFMqpRe4orMgvOP5LCvz1z0EwQhN4NJlM/pNSi73enizxdLk9+9fQWxok86HbRvdJ hz79mj0fY7xSg3kGd55JnPUUjrfMPKp0i5w+UAE+Q/ILNPwBbDzd0Q4fKCTMjOD8Mx1Z xZRg== X-Gm-Message-State: AOAM530G/w2l22wZ2mICiJAgPoy9e+c4utZhGZyBLZ4NcKhg18P4hfv1 0owUOfd61N6OESxeLQ9+gd6mgOEssvtOgA69QeTb9QX+n2A= X-Google-Smtp-Source: ABdhPJzik6LI1wM4cW/9Q/3xWnhZhnaCC+e1pDtt1SnfaRE34SsY6qOjled3s0RGXXMvLPKMEeXZhV9fYFR+GUIcuxQ= X-Received: by 2002:a5d:9f44:: with SMTP id u4mr32969028iot.163.1639406842318; Mon, 13 Dec 2021 06:47:22 -0800 (PST) MIME-Version: 1.0 From: Dave Taht Date: Mon, 13 Dec 2021 06:47:10 -0800 Message-ID: To: bloat , Rpm Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Bloat] exploring a strangeness in a modern tcp and kernel 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: Mon, 13 Dec 2021 14:47:23 -0000 I have been off trying to get good benchmarks of the new mikrotik 7.1 release, which has a working version of cake and fq-codel. Got a very enthusiastic tester running the "xanmod" kernel which among other things, has bbrv2 on by default. Incredibly long, often confusing, and ever growing thread over here: https://forum.mikrotik.com/viewtopic.php?p=3D897719#p897629 News so far: cake doesn't crash - that was my basic objective!! - as it would crash in mikrotik 7.0. It works great on our basic suite of tests up and down... Tons of flent plots vs a vs fq-codel, a fifo, cake, and sfq (sfq is the goto default in the mikrotik world) First ever test of BBRv2 vs cake that I know of (we moved back to cubic later). See pics. First time I've ever looked at how a bonded dsl connection works However, after finally getting a packet capture, the *stumper* is that tests using 8 or more flows actually get capped throughput well below what the link is capable of, and I have no idea of the cause, as yet. Up until now I was thinking the aqm was to blame, but... --=20 I tried to build a better future, a few times: https://wayforward.archive.org/?site=3Dhttps%3A%2F%2Fwww.icei.org Dave T=C3=A4ht CEO, TekLibre, LLC