From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lj1-x236.google.com (mail-lj1-x236.google.com [IPv6:2a00:1450:4864:20::236]) (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 C9F923B2A4 for ; Mon, 18 Sep 2023 19:08:38 -0400 (EDT) Received: by mail-lj1-x236.google.com with SMTP id 38308e7fff4ca-2c0179f9043so19073921fa.1 for ; Mon, 18 Sep 2023 16:08:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1695078517; x=1695683317; darn=lists.bufferbloat.net; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=TXzRGlTJapFaPkik3rx96PMnkfUgQ13Q84P2plVzRSc=; b=dtuikpV05VoHNa4s2lNsJMzw4SEphtFEaX2VERKLNvY6sas/aYNiBqQTJvddp5ThOw 4vHPT46C0NTLrZH4847afBQzepVM9g8DcIbWy1uaCI82qzBtrCdqBbEqaP/n375/a4ey UqwCo8y8YhUpwijva9BySPdMrbTYZ3Sd1MGez110dBLY1yBs5PwYJhLFOE+h0RMR7hbN bFsjZcAlXcTY9b+rFV0koVq+o0kDj8wP6Ppd7gRqvGgaBcd1d/6sgXHHQPQN528lRJoV T7jLYp2t1fsePkjV+VoEn6FD9NLvntMqBSzq5+4Hfd7m8qZdGNw8oq/96G3M0qmIr3e1 g9Iw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695078517; x=1695683317; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TXzRGlTJapFaPkik3rx96PMnkfUgQ13Q84P2plVzRSc=; b=Jq2JaGGHZ/A97RVI5/E8uLagWxF0/b0X6J35cw3MqEzhcJ+3DNOBLJXDIkNFtMsm2G TOslkD/gj3b2EUFkTwo1/sA2zabxQ+tPkle2uyVeW3ABJSovUBE34+fe1bYvcRjMDxvm FR2o0a9jClho1mbJlSaft8NkkXVrAkpmJgnZU5xjZzge/shvjQVbC/yFZxJ2Jt/ARYir YJuQX32YBdjIJyq/vRW6JgEoUR281K7AaM567iSbuy5P6O+qptU9RM80yPnSMidC0xEz 2MlcAcjt+0ZBw+TreqXSH1GUSg1ii8UpbMdZH3L7J1VLezN6Ul7nhFBKfaKoRbF4IONZ rQHg== X-Gm-Message-State: AOJu0YzWqymHEX7unBZi+1/zujm8I2eHHGzkCOYU9zH4mxxyS+Qx6JHd Orrty0HLTXAOCLvrmRq65xfRjt7s7uY= X-Google-Smtp-Source: AGHT+IH6E08etTrF1zjjlfIAJtYMMpUN7eWehUA8/W9xJpsSBlrGN6B0dZ8QyZLQIt7elEdlVJzOcg== X-Received: by 2002:a05:651c:10c:b0:2bc:d5f1:b9cf with SMTP id a12-20020a05651c010c00b002bcd5f1b9cfmr8410347ljb.27.1695078517117; Mon, 18 Sep 2023 16:08:37 -0700 (PDT) Received: from smtpclient.apple (178-55-83-36.bb.dnainternet.fi. [178.55.83.36]) by smtp.gmail.com with ESMTPSA id u25-20020a2ea179000000b002b9e9a8532dsm2295624ljl.138.2023.09.18.16.08.23 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 18 Sep 2023 16:08:28 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.100.0.2.22\)) From: Jonathan Morton In-Reply-To: Date: Tue, 19 Sep 2023 02:08:22 +0300 Cc: Cake List Content-Transfer-Encoding: quoted-printable Message-Id: References: <115D8B11-D45F-4997-A048-8E3251E86625@gmail.com> To: dave seddon X-Mailer: Apple Mail (2.3654.100.0.2.22) Subject: Re: [Cake] some comprehensive arm64 w/cake results X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Sep 2023 23:08:39 -0000 > On 19 Sep, 2023, at 1:52 am, dave seddon = wrote: >=20 > I'd love to understand the difference between the tests I've been = doing and your tests. > =E2=80=A2 How many TCP flows did you have please ( cake = performance seems to drop significantly with increased number of TCP = flows, although I need to do more testing to understand why )? It's almost certainly related to the extremely tight AQM settings you = imposed on it, and on no other AQM you tested. > =E2=80=A2 What was the RTT? I think this was just in a LAN environment, to gauge the capabilities of = the machine just as you're doing. We insert a delay in the middle when = testing other things, such as the performance and fine-scale behaviour = of a qdisc/CC combination. > =E2=80=A2 Load tool? I believe Pete was using iperf3 for this, or possibly Flent which = delegates to netperf. These days he's developing something new along = the same lines. A simple test using one or more of Flent's standard tests should be = enough to replicate these results, at least approximately. I would also = recommend using ECN, but you should get at least reasonable results = without it, provided the AQM is set sanely. - Jonathan Morton