From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) (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 30C723B29E for ; Thu, 3 Sep 2020 11:31:19 -0400 (EDT) Received: by mail-wm1-x344.google.com with SMTP id v4so3311901wmj.5 for ; Thu, 03 Sep 2020 08:31:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ieee.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=7ZT64VcjR9evhJheSUuENROgT5hVVy+hc6isK/SQHJc=; b=RjKGYbKQZoWD7cR3DNCiyzwOkvSZaa8Benhl4ixFBRM85EQ7ZjGJvjk7G51yVcpZww V2asaXsMZ7etjFDHjX4Q6YhBH8ueKkjePH2aUg/BEpn51w5Y1X0h2y4bgxyCdWY494W1 Tg0J2OuxesUGI5FHnQEAW5VLLhyhxS67Bcoc4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=7ZT64VcjR9evhJheSUuENROgT5hVVy+hc6isK/SQHJc=; b=smZtJmyF9mKUy0qgHEkcC6Q5mJhO64xyqUP3m2ifIyrTbzwhCB6Wm+SouvF4NmKOlh MEay0OqLkDIPgo7hYEmfGjFTno7L92FfCNKvZaVKz52PLYyAfI4eqs5CIChdUxZAuhqI z6AScweBBs4s0jUaU9s5zy1bNhea4GUcqEY277tWzeUv6HrMt3Xzu0ruulKuwog9zbsP wpaSIAGDPxAf2JKsWHdrURmWsWpfomJxqw/jc+2kem+HKBuoYehi5Mb7Pea8PBKZ1+SH 1Ur77jqpuX649Mi6dbUBbst/Mrf5IQf1Q5W1yqOf8R3UEFt5SUPRdxsWM2yy2eAwtykK PI0g== X-Gm-Message-State: AOAM533iXmi5ciFoI4UZXtbPGX2CVTezceRFZDo2WfItG8u0y6YOPiQd 3ysFtuq7EYoTUr6ucy7HnK4Hpno1G+lOqSMpDqcGPg== X-Google-Smtp-Source: ABdhPJysz3j29BE3mxmqN81Zrlm5fSjY13lwA5jNUQIQz2Q8rPIIxdTmnndvTjp7A96HKz2jZARQbbkWnyurK8BANs8= X-Received: by 2002:a1c:6487:: with SMTP id y129mr3202414wmb.90.1599147078138; Thu, 03 Sep 2020 08:31:18 -0700 (PDT) MIME-Version: 1.0 References: <87mu2bjbf8.fsf@toke.dk> <5DBFB383-13E8-4587-BE49-1767471D7D59@jonathanfoulkes.com> <87r1rliiiw.fsf@toke.dk> <07CD4278-D448-49D2-AC73-9C230EC041DE@jonathanfoulkes.com> <87imcxi4mq.fsf@toke.dk> <877dtbgcc6.fsf@toke.dk> In-Reply-To: <877dtbgcc6.fsf@toke.dk> From: Luca Muscariello Date: Thu, 3 Sep 2020 17:31:07 +0200 Message-ID: To: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= Cc: Mikael Abrahamsson , bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Bloat] CAKE in openwrt high CPU 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: Thu, 03 Sep 2020 15:31:19 -0000 On Thu, Sep 3, 2020 at 4:32 PM Toke H=C3=B8iland-J=C3=B8rgensen wrote: > > Luca Muscariello writes: > > > On Thu, Sep 3, 2020 at 3:19 PM Mikael Abrahamsson via Bloat > > wrote: > >> > >> On Tue, 1 Sep 2020, Toke H=C3=B8iland-J=C3=B8rgensen wrote: > >> > >> > Yup, the number of cores is only going to go up, so for CAKE to stay > >> > relevant it'll need to be able to take advantage of this eventually = :) > >> > >> https://www.hardkernel.com/shop/odroid-h2plus/ is an interesting platf= orm, > >> it has a quad core machine with 2 x 2.5GbE NICs. > >> > >> When using something like this for routing with HTB+CAKE for bidirecti= onal > >> shaping below line rate, what would be the main things that would need= to > >> be improved? > > > > IMO, hardware offloading for shaping, beyond this specific platform. > > I ignore if there is any roadmap with that objective. > > Yeah, offloading of some sort is another option, but I consider that > outside of the "CAKE stays relevant" territory, since that will most > likely involve an entirely programmable packet scheduler. There was some > discussion of adding such a qdisc to Linux at LPC[0]. The Eiffel[1] > algorithm seems promising. > > -Toke > > [0] https://linuxplumbersconf.org/event/7/contributions/679/ > [1] https://www.usenix.org/conference/nsdi19/presentation/saeed These are all interesting efforts for scheduling but orthogonal to shaping and not going to help make shaping more scalable.