From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf1-x133.google.com (mail-lf1-x133.google.com [IPv6:2a00:1450:4864:20::133]) (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 6ADFD3CB47 for ; Fri, 22 Jan 2021 16:43:16 -0500 (EST) Received: by mail-lf1-x133.google.com with SMTP id u25so9583649lfc.2 for ; Fri, 22 Jan 2021 13:43:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=9lsUNcfFHFWiF4CVSK2E8Z+iu5t38jbeKGD2DI/t3Cg=; b=hYN38sQRdil2bQi2d4WCN8EEygKLqvw6LVTjJa8Rp9b6jB+d6tvsbQSoD6BUK87XQe 058CgovANHGOj3bXbJPKI4u1OOwaAi2zLy5V57DneJ9hP/AE7FJOGI3MKRuoFgBQI4Ej C14Zv957KIppFXGxWZxFEx8InOtDVjREXMmcDKr0VLd0KivBK58c5Hbe6qOpBuY1T7zy TeFBedTS/mxmS3k1R0zdf7JJ+IxQ5WqHBOwLoAB8SUoceEu2ahV4/Ydgiw/uDfXy1UER Aln5SZJmpnSm0AHAK/4dXjbLLJ5tfhsru0oCg6l2r7TptCJ6Zo7Km2kzzNHDNkWptme1 BAGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=9lsUNcfFHFWiF4CVSK2E8Z+iu5t38jbeKGD2DI/t3Cg=; b=fdIfW+R9vAJL1175RahWBJVSV+qH1MVyQHl7TQQrxxbIeIhHFUuZAQx1fNgL9QSliH Evx3cs3uvA8Yy7HrT/stLwCnsff5AZcvX3sMZ/sfcMyrZwJos7wlAx/4BD3H8sz0TqpJ L7v3yClkYkoL+4EhaHzeaTz6BscwSlcLoK49WtY6qY/btUFLP/HFjq02BcDJX+eG957q EYrLdl6IUCVpEkMjIh8pvYF7FDI5Tg326WSezU1UcqsFUjloox3IghEVxN6DxcoN/wWc c/mnAsOlxlUjMzDFl9RJlklf5CRSQIAQIbj344f75BT3i02e71ZYCwZNhq+CYtnPFPUC SHaw== X-Gm-Message-State: AOAM5308pIV6NU0tgzBLxvpqAIfjjRI6idP51N8GClb3hH5uoNxwI1/Z GCvbrOQS8mNFi7NguPAba38= X-Google-Smtp-Source: ABdhPJykW/7nH2q8bZQGsk6/eF5uI+9xf+cGDhYXomOu+iLA1yaPkVdPWZjpso9ArnzDd7uIC8NaWQ== X-Received: by 2002:ac2:511c:: with SMTP id q28mr2948238lfb.343.1611351795258; Fri, 22 Jan 2021 13:43:15 -0800 (PST) Received: from jonathartonsmbp.lan (178-55-159-18.bb.dnainternet.fi. [178.55.159.18]) by smtp.gmail.com with ESMTPSA id e27sm1098731ljb.6.2021.01.22.13.43.14 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 22 Jan 2021 13:43:14 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.7\)) From: Jonathan Morton In-Reply-To: <87bldg65mg.fsf@toke.dk> Date: Fri, 22 Jan 2021 23:43:13 +0200 Cc: Sebastian Moeller , Stuart Cheshire , bloat Content-Transfer-Encoding: quoted-printable Message-Id: <05D85DE3-2438-43E9-8221-31CFC19087F8@gmail.com> References: <932357EB-614C-4F74-925C-A1D6FB5F3AD2@apple.com> <0631EAAE-AF0A-4A32-BE06-6A988B19B0A8@gmx.de> <87bldg65mg.fsf@toke.dk> To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Mailer: Apple Mail (2.3445.9.7) Subject: Re: [Bloat] UniFi Dream Machine Pro 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: Fri, 22 Jan 2021 21:43:16 -0000 > On 22 Jan, 2021, at 11:09 pm, Toke H=C3=B8iland-J=C3=B8rgensen via = Bloat wrote: >=20 > As Sebastian says, the source of lower performance when using SQM on > some boxes is the traffic shaper, and sometimes the lack of hardware > offloads. I have a strong suspicion that on some hardware, the offload engine & = switch is connected to the SoC through a link that is much slower than = the Ethernet ports exposed to the outside. As long as traffic stays = within the engine, it can run at line rate, but engaging rich software = measures requires stuffing it all through the narrower link. This is = independent of the CPU's capabilities and is purely an I/O bottleneck. In this particular case, I believe the router portion of the Dream = Machine is natively a Gigabit Ethernet device, for which good IPsec and = SQM performance at 800Mbps is reasonably expected. The pair of 10G = ports are part of the switch portion, and thus intended to support LAN = rather than WAN traffic. Think of it as equivalent to attaching a = Raspberry Pi 4 (which has native GigE) to a switch with a pair of 10G = "uplink" ports for daisy-chaining to other switches. - Jonathan Morton=