From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-x236.google.com (mail-pf0-x236.google.com [IPv6:2607:f8b0:400e:c00::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 40BFC3B29E for ; Mon, 30 Apr 2018 17:21:28 -0400 (EDT) Received: by mail-pf0-x236.google.com with SMTP id j11so7700327pff.10 for ; Mon, 30 Apr 2018 14:21:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=30XBphjn1kNOTwIHocKYA9zPP9QYbHBnSHgN54htMl0=; b=FJHWhCvw6x72aJva/SNeLguwL+qUWmUcAGKYYGyxHQMwK/ncKf4EvmZ68DmgIBlWVW UQiYCF6nMehKRfrGHFsxutkThPV5MXdpRwMk4P//6noaYe7Jq6fcG2X7eV2kCp2K9qo3 2hfHQE4s2uSaeUbSy6QM6oX4l8fRy26jzWn8HxL1YyVvBTivHNAFerZGIYPK2FZ8zyMw mwxUY1g8tEg6YzPq6Eepv4TMmJKFHBnN9Xsq4GruTOW/k0SS4oeBSjsCNi1EwoWHgWcA 54XwgRhn5cKXKjZMgHEZKzzxMLQ6RargY2i2MKcugxxprM97ph4Kc5HALxrfUaZj8CmG +C8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=30XBphjn1kNOTwIHocKYA9zPP9QYbHBnSHgN54htMl0=; b=Tbfb8MdsIBbosSEypcwhu/bylVysc66m3nPTbPBFCwA74CVokhtg16hsDYJWDXDQbo zGacspH8tCG+tGRK/YaMb0XZi7RDE5RcL73jF14aPNUtYurO5Et3jO+P5JrxlXqJRM2K pi1Clnv14RJHiInul5ACdQ+W8aVnS3USfC8qWSqWG4wuNkX2PuopSrUSZTBlXPSph3sH mUvC+Yqa8myjKyapdlVs45udEqiQvkZYJueUKJPjgEBrQWxQBvTz/hD4BlxUBPl6Z1Q3 pjEwzU2tApsUM1lovGBnZR8ciNvknu/+0sCdtrJ9BSK6VUomQkwUFV52Pj1FQVi+zBoY p1Rw== X-Gm-Message-State: ALQs6tBjWM7aaMg95rmqkWxhJDy3FgQYK+ghvRc8ss91131CnOW8az6H ktp3COfgiFeCYaBr+KDXM697cOKcSWNiHeW4/Rk= X-Google-Smtp-Source: AB8JxZoYGOuseGCNnYrBYLP1D87o9v4ZhntKZev0DUFEZFXvdXa/IZdXYvFNWAp9kyLjLSau3BF0RAzbkAWyZQgFSU8= X-Received: by 2002:a63:6f46:: with SMTP id k67-v6mr10977516pgc.303.1525123287372; Mon, 30 Apr 2018 14:21:27 -0700 (PDT) MIME-Version: 1.0 Received: by 10.236.179.152 with HTTP; Mon, 30 Apr 2018 14:21:06 -0700 (PDT) In-Reply-To: <20180429213439.7389-1-toke@toke.dk> References: <20180429213439.7389-1-toke@toke.dk> From: Cong Wang Date: Mon, 30 Apr 2018 14:21:06 -0700 Message-ID: To: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= Cc: Linux Kernel Network Developers , cake@lists.bufferbloat.net, Dave Taht Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Tue, 01 May 2018 06:39:11 -0400 Subject: Re: [Cake] [PATCH net-next v6] Add Common Applications Kept Enhanced (cake) qdisc 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, 30 Apr 2018 21:21:28 -0000 On Sun, Apr 29, 2018 at 2:34 PM, Toke H=C3=B8iland-J=C3=B8rgensen wrote: > sch_cake targets the home router use case and is intended to squeeze the > most bandwidth and latency out of even the slowest ISP links and routers, > while presenting an API simple enough that even an ISP can configure it. > > Example of use on a cable ISP uplink: > > tc qdisc add dev eth0 cake bandwidth 20Mbit nat docsis ack-filter > > To shape a cable download link (ifb and tc-mirred setup elided) > > tc qdisc add dev ifb0 cake bandwidth 200mbit nat docsis ingress wash > > CAKE is filled with: > > * A hybrid Codel/Blue AQM algorithm, "Cobalt", tied to an FQ_Codel > derived Flow Queuing system, which autoconfigures based on the bandwidt= h. > * A novel "triple-isolate" mode (the default) which balances per-host > and per-flow FQ even through NAT. > * An deficit based shaper, that can also be used in an unlimited mode. > * 8 way set associative hashing to reduce flow collisions to a minimum. > * A reasonable interpretation of various diffserv latency/loss tradeoffs. > * Support for zeroing diffserv markings for entering and exiting traffic. > * Support for interacting well with Docsis 3.0 shaper framing. > * Extensive support for DSL framing types. > * Support for ack filtering. Why this TCP ACK filtering has to be built into CAKE qdisc rather than an independent TC filter? Why other qdisc's can't use it? > * Extensive statistics for measuring, loss, ecn markings, latency > variation. > > A paper describing the design of CAKE is available at > https://arxiv.org/abs/1804.07617 > Thanks.