From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x232.google.com (mail-lf0-x232.google.com [IPv6:2a00:1450:4010:c07::232]) (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 934D53CB45 for ; Wed, 11 Apr 2018 14:00:02 -0400 (EDT) Received: by mail-lf0-x232.google.com with SMTP id d20-v6so3895686lfe.3 for ; Wed, 11 Apr 2018 11:00:02 -0700 (PDT) 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=DsXou59uLltpIt7Z7qHsCMbLmXnMY+CP8QqX18qH5G4=; b=RBPQhXXnpVZZzeIkfNwdYKNyPlvPZ+8WD6HOC0XELmzG5FJqoLNoRlTx+9i1si3ife ZV/AcA4uO1DL5egwjyGUbC5wl7S/A85bwrT/gSdcs7JTHpwNpx9OhgZUFrZthanDZxSz SpTqGJdEYrVL68mrKIG6Mm/M5RQWH4oMbjOhiDa3MaXx3YzaNJA/xmdxtSUWN5Am6Ynw zteuD2PMdIJr+fbZ3wSx0GRJAW9UxNxOe08lBuEw/RBIhNlCb/i3eUaFFW0iJrG6dU4T aiRxHM4UEhiFagghAfA8zAjTjY3SgUmHMt2KYJNXm3AbwPjG8XczWBXhdLa5M6KIZvlO TheA== 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=DsXou59uLltpIt7Z7qHsCMbLmXnMY+CP8QqX18qH5G4=; b=nWVAQXeSPtXB3qL0BfJce8ZrHQ7Y13jITkUP5TYi4u00wdzbLTsHo0emGK6vABR2f0 LSK0SO9ZFcPSHjjMtemTffzOSlo3o9eFTHs6y+tZwfoVxlYzinzDMcBzL9Hx682qbMLX 692X9zNPWzvThJTjzBPct6l7RfrbLukTtibIy0HGe74Ow8Gz99v9jHiQvnzacTJJ9i2i 1q3wCzHcqYqZ7BrQBc9LpiRtl5LOyF2hYF2VNy0DOhXlKwdAN7ADVOy1WqDSZ9RbcFqE nbS9p3PtmBi/rbfK0V7G9e9YoTwC+KxD+wSKhFQUit8oPS17b1DvslPhoB4t0nu3tFg8 NX/Q== X-Gm-Message-State: ALQs6tDJdmrQqZYjgNpPGACxBuel8X6ryfsejzq9l/gNQhSgulyEkBCN MQMkfDhSTkyzcMoHYzXpVgk= X-Google-Smtp-Source: AIpwx496J+hRn4SwO4H1XeORwWQjogfBBCZb+twtdarN13VRfD5rintMOWALjl/HdHEsC5GnIYAVEQ== X-Received: by 10.46.154.70 with SMTP id k6mr3538587ljj.63.1523469601471; Wed, 11 Apr 2018 11:00:01 -0700 (PDT) Received: from [192.168.239.216] (83-245-237-197-nat-p.elisa-mobile.fi. [83.245.237.197]) by smtp.gmail.com with ESMTPSA id o21-v6sm349862lfi.3.2018.04.11.11.00.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Apr 2018 11:00:00 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.2 \(3445.5.20\)) From: Jonathan Morton In-Reply-To: <87vacx8wj7.fsf@toke.dk> Date: Wed, 11 Apr 2018 20:59:59 +0300 Cc: cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <50C2E3D7-975E-4067-9F0C-E32FD6C26041@gmail.com> References: <87in8xahqp.fsf@toke.dk> <874lkhacli.fsf@toke.dk> <893A616A-E5EA-4398-87E3-491385E61850@gmail.com> <87vacx8wj7.fsf@toke.dk> To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Mailer: Apple Mail (2.3445.5.20) Subject: Re: [Cake] Cake not more CPU efficient than HTB+FQ-CoDel (anymore)? 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: Wed, 11 Apr 2018 18:00:02 -0000 > On 11 Apr, 2018, at 8:47 pm, Toke H=C3=B8iland-J=C3=B8rgensen = wrote: >=20 >>> Also would be nice to get a measure of the smoothness of the >>> shaper; will see if I can't extract that from a pcap file or >>> something >>=20 >> I remember using tcptrace for that purpose, once upon a time. >=20 > Yup, that was my plan as well. Just not sure whether it has a metric > that is better than "look, the graph is smoother"... ;) It does have a throughput graph available. However, this is based on = raw inter-packet spacing, so it'll have line-rate bursts interspersed by = very short gaps if Cake experiences any scheduling latency greater than = the serialisation delay of one MTU. The best counter to that might be to select a low rate, so that the = serialisation delay is 1-2ms or so. It should then be easy to contrast = with HTB's behaviour at that same rate. - Jonathan Morton