From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-x234.google.com (mail-qt0-x234.google.com [IPv6:2607:f8b0:400d:c0d::234]) (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 419283B29E for ; Mon, 30 Jul 2018 13:40:03 -0400 (EDT) Received: by mail-qt0-x234.google.com with SMTP id z8-v6so12972313qto.9 for ; Mon, 30 Jul 2018 10:40:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=EuENrvA8jE7FW7KBffYPFB1K1lz8qK+nX8Vwdt8uabU=; b=T/v71onOV1IZyI0WGupTRsCz8bJKyLeryTaqXrKwgfr4UjnUDPWtc++KXVv5KNP9qF Cf9aj5OqFICq7AdPVgQHbHVONW/jFNOPFmUmXpLp2ncdPFhQWHxo2Z//Wk0vz2R2bSLn sbfO4gEiYmAiTUi+RETT7p/vlyGlVvKmFUVUzqQUfJm1eVcfsrU3TOz4jppLhe/NaZPF YmXGvYW2H6ape2hoY2kA6jGQ6UgGw+tNgSupEhrAPJ/PeWjstnPzNmZzJOVYfYU//k4z JjEeLPlDyOJt/h4ypHjfwqzk7BqyM7X44s6/nwJhZHc1ndxYLITmzTqeG+su4qRrJF7t y/hw== 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=EuENrvA8jE7FW7KBffYPFB1K1lz8qK+nX8Vwdt8uabU=; b=JsHI9EQSfzjMgv7fo4ce4tnW8jWFR2RwlSn7Lq7PJPPrch8Sasz4bU3ubYiGGm5qjD zYvZaOTxuEKztG1qI0EhPBOA0MU2prB/DXKnOV+8GugDrBdsLPQsGp0Mrn6UwHeJvQaI fx4Pjoa124YuE7To0afkjuCWGcXKhYiV8TgZwA78BBlH1JHSSGJoU4WuZnqzS+BDKC9J mbGelgKxGS7wJy2+KEfKmrin1ure1rWFbFmVMAuBykf27mwV2ZtF7wuXqK0erc33eu4b uaIqSp13eT8ndNFTKG9ORUqWjhJ8ONgNGsSlCnjYSrqsDVGNfk8nMma/k4YHG/dZb+sG UKLg== X-Gm-Message-State: AOUpUlHDp4hhuD0yJXLjQvVyYhpdT+qOFD/aeE09Hv/kD96cpTIYEWV8 L+xDkMG6dv89I4vZik0Wm+6R1RgzXoHGKIlNkiw= X-Google-Smtp-Source: AAOMgpdBidL5fNTMBKJAWlKEwRIxMcp+/Ntx6tB906eQ2jSGy0YStaIgAIlMLnzrPSRqyyHkNzgjRj/7LlwegvliFtg= X-Received: by 2002:aed:3c8c:: with SMTP id d12-v6mr17804458qtf.203.1532972402729; Mon, 30 Jul 2018 10:40:02 -0700 (PDT) MIME-Version: 1.0 References: <942CB8C5-81AD-4359-8DEB-77603EB91D1F@darbyshire-bryant.me.uk> In-Reply-To: From: Dave Taht Date: Mon, 30 Jul 2018 10:39:51 -0700 Message-ID: To: Loganaden Velvindron Cc: Kevin Darbyshire-Bryant , Cake List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Cake] man page bikeshed 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 Jul 2018 17:40:03 -0000 other stuff. * gso-split no-gso-split not documented (what section do they belong in?) * ingress/egress keywords not documented I would like to bring out more that cake is a shaper that can also be left unconfigured and run at line rate. I honestly *didn't know* everybody else here wasn't using it that way... it's my default qdisc on everything with spare cpu! dogfood it via: sysctl -w net.core.default_qdisc=3Dcake " CAKE (Common Applications Kept Enhanced) is a shaping-capable q= ueue discipline which uses both AQM and FQ." is a bit weak. " CAKE uses a deficit-mode shaper, which does not exhibit the ini= tial burst typical of token-bucket shapers. It will automatically bu= rst precisely as much as required to maintain the configured throughp= ut. As such, it is very straightforward to configure." I have fiddled with the metro setting for local lans. at a gbit, the results are "interesting" as a local qdisc, at 100 flows, we end up with full throughput, 70k of buffering, 40k of bql, tons of marks, bunch of drops in the switch (which is like 192k of buffer there), and short rtts and lots of retransmits. cwnd is capped too much. (the sch_fq alternative is like 1.7MB in size and I haven't tried to compare the two) Or maybe that was a 500 flow result. Can't remember just now. On Mon, Jul 30, 2018 at 10:23 AM Dave Taht wrote: > > I would rather like the man page (one day) to include two realistic > examples - (say a week's uptime), taken while loaded, one example > outbound, one example inbound, rather than the unloaded one it > currently has and the less than massively loaded one... > > I loved looking over this result (at 40 users!) today. > > https://forum.lede-project.org/t/sqm-cake-and-piece-of-cake-qos-high-cpu-= usage/17794/2 --=20 Dave T=C3=A4ht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619