From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-x235.google.com (mail-oi0-x235.google.com [IPv6:2607:f8b0:4003:c06::235]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 4454121F416; Sun, 14 Jun 2015 12:42:28 -0700 (PDT) Received: by oiha141 with SMTP id a141so47229560oih.0; Sun, 14 Jun 2015 12:42:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=mjUoSj/QXwh5XKd0L4n/+Zl+V9zuTRHYP7hxBml8+Pw=; b=aV1M/n+k2HHhNFi2pFZmm2p8vrrGerU9vcBslVtiBwrR76N3A+dD9BGp4LF6LM1BlC R6RcvGALWxkGJOClc+3e+lIeYA0eBXTbtFRpvQbIK72d2Mfcc7iG7iilGoMWXFRqkTem zX5AlMHQ+qQu2Jx4oZDb4v7sMoMG1+AuPG3EOO3BnFThRpli32HFnjvV8e6lwAtoll+u ZNEM5j5QGtBCfgc5oM/Aaf1RzYWOVRBuX86mp5yXbuUVt4SgcrUCDf9hLbcLBUR5a1jd q5z9snIAAx7sOX76kRJink7rOv4Gud97pS6Ptrz7mVq8QyIFkyw16SqlxfxQ9TtImTjO rJMA== MIME-Version: 1.0 X-Received: by 10.60.178.33 with SMTP id cv1mr20669364oec.11.1434310947361; Sun, 14 Jun 2015 12:42:27 -0700 (PDT) Received: by 10.202.105.129 with HTTP; Sun, 14 Jun 2015 12:42:27 -0700 (PDT) In-Reply-To: References: <0CFA8991-9F5E-4988-82ED-6CA0E4E08676@gmail.com> Date: Sun, 14 Jun 2015 12:42:27 -0700 Message-ID: From: Dave Taht To: Jonathan Morton Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: cake@lists.bufferbloat.net, Alan Jenkins , "codel@lists.bufferbloat.net" , "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] [Cake] openwrt build available with latest cake and fq_pie X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Jun 2015 19:42:56 -0000 On Sun, Jun 14, 2015 at 12:35 PM, Jonathan Morton w= rote: > >> On 14 Jun, 2015, at 21:24, Dave Taht wrote: >> >> Flows, btw, do end quite rapidly in the real world. What was it, 95% >> of all web flows ended inside of IW10? > > It might be worth thinking about how heavily loaded a network needs to be= for Codel to trigger on such a flow. However, with perfect flow isolation= , count will start at 1, making it less relevant to the present thread. > > Cake will start triggering on a instantly-arrived burst (call it a packet= salvo) after 35ms. Thus, a ten-packet burst will not trigger provided at = least 4.5 Mbps is available to that flow. However, on many links that is s= till a tall order, since if the flows really are that short, there are prob= ably lots of them in parallel. > > A paced burst is much more friendly. At a 100ms RTT, IW10 could be deliv= ered at 100pps (1.5 Mbps), extending the range of link speeds on which cong= estion signalling will not occur by at least 3x (and generally more). Sinc= e this greatly reduces the risk of packet loss, it might actually reduce th= e average time that the sender needs to maintain the connection=E2=80=99s b= uffers, despite the deliberate 1-RTT delay introduced. Data point: Quic is presently 10 packet burst, 22 packets paced. Not that I like it. > - Jonathan Morton > --=20 Dave T=C3=A4ht What will it take to vastly improve wifi for everyone? https://plus.google.com/u/0/explore/makewififast