From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) (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 500DB3CB64 for ; Thu, 29 Nov 2018 13:43:41 -0500 (EST) Received: by mail-pf1-x42f.google.com with SMTP id c123so1470703pfb.0 for ; Thu, 29 Nov 2018 10:43:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IJ74GyS9jpl98AU8DnTQ8H26XUU2hnxPAaguxQL6KVE=; b=FDT9Hss1Qwu11yejq/3cLcQvyCRF0QYpBvD1VbLb9TY83KpLvq2AcFQvgeD/cvsunZ nfxftGbm58KSS36A251LnVlR2x3ksVbP94QlHZi4ANdc7hJ6efxivxfhi8cSzJ2zoHub c3oFIeswohxB0Sbnk/6rnuD0hjC7ndPb1EfGHGgx3oXBCUy8X5/1YbK0JTiXWUVLiAxN HOUye0A/v2i9DsddViKza2LSpVS2m2BIHWGnzGEzAD0Lbx4+pydF68hJouDTrdsaXYd4 dfAA3iPgmqn5V3C7otakkxOJj/+6yZcBysI4G83Lqomk5Ob9I/OAlvuFFvoHa3E+BsIL vDWQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IJ74GyS9jpl98AU8DnTQ8H26XUU2hnxPAaguxQL6KVE=; b=M+dqw1nrRmlg3u/Q9T0EUM716tgiiXYWTE0np18HOonn3FdaMqCGf1Ho+T1u+8CABW TJFO7GoCWDuANJyd63NFhvDNDhTLlqLi1WmoOfBwdgvLH06/zMIRqx//Peby4ZtIQJru DEgJfkKG77HY1ZQfpXIpAl3yWiy3TZx74WEec8LFsSxOhdtZ68zXXTXje3RjHgnnnE9e xC9HRld1+gweENLWvyleA5tAo1hadOuNSW6xpTEbYhWiLP1sU3GE0ulrvmZAUQuC2u3X SBgZcybjubqjQjiWItzKnMRHR786A8hOd8xQs2Xcmwa6Aupd3gOGr97swZdeLzJfm73e qwpw== X-Gm-Message-State: AA+aEWYE5aamrBBzzIVJHr6wmWSNNj4xs1JAeW9iXj2MUscZaRzSThcX pTqSQO26sbxPKTs1SMmTgvo06A== X-Google-Smtp-Source: AFSGD/WzTNMdy9gbZnksC6OsjnlKTES4RzFo5UWgfFj8eK+n/5AM/O/Ey60l2kmN2t24IXdTQncx9w== X-Received: by 2002:a63:c64f:: with SMTP id x15mr2135058pgg.16.1543517020341; Thu, 29 Nov 2018 10:43:40 -0800 (PST) Received: from xeon-e3 (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id i1sm3320016pgb.46.2018.11.29.10.43.39 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 29 Nov 2018 10:43:40 -0800 (PST) Date: Thu, 29 Nov 2018 10:43:32 -0800 From: Stephen Hemminger To: Dave Taht Cc: Mikael Abrahamsson , Jonathan Morton , bloat Message-ID: <20181129104332.5b2c7de7@xeon-e3> In-Reply-To: <87d0qowd2e.fsf@taht.net> References: <65EAC6C1-4688-46B6-A575-A6C7F2C066C5@heistp.net> <86b16a95-e47d-896b-9d43-69c65c52afc7@kit.edu> <87d0qowd2e.fsf@taht.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [Bloat] when does the CoDel part of fq_codel help in the real world? 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, 29 Nov 2018 18:43:41 -0000 On Wed, 28 Nov 2018 23:35:53 -0800 Dave Taht wrote: > > As someone who works with moving packets, it's perplexing to me to > > interact with transport peeps who seem enormously focused on > > "goodput". My personal opinion is that most people would be better off > > with 80% of their available bandwidth being in use without any > > noticable buffer induced delay, as opposed to the transport protocol > > doing its damndest to fill up the link to 100% and sometimes failing > > and inducing delay instead. The problem is that any protocol is mostly blind to the underlying network (and that can change). To use dave's analogy it is like being put in the driver seat of a vehicle blind folded. When you step on the gas you don't know if it is a dragster, jet fighter, or a soviet tractor. The only way a protocol can tell is based on the perceived inertia and when it runs into things...