From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-x22c.google.com (mail-lb0-x22c.google.com [IPv6:2a00:1450:4010:c04::22c]) (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 2972E21F303 for ; Wed, 22 Apr 2015 12:05:30 -0700 (PDT) Received: by lbbqq2 with SMTP id qq2so187623284lbb.3 for ; Wed, 22 Apr 2015 12:05:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Ui/tpfzAKeM2T/L/7RcwkwKebz8KA4/vCHyA+IzYpHE=; b=IFkAihD9WSjIz5DZt11DpTCIDHEZ9fxaAtyIWCXrhza56u18wid1lwGFJQDehu8MKh W+qftd4yB9Cr6TdautZ6nO+PEyFiaTqXSFYHpAoYtYgmnZT+QV/W2pJ8enCWkx8Jbl+q VrYzY+oHKgJsCM0gzUTuE/tq36pSZF1fzEIxNwZd4DZUs4w2sIYnq1LYgHlzHjrIHmVS DSzi94kqSlAN8TvgaqF5RcgXRghVD6BswbnLPSoci/HMZYGukG6ErH8BE3+Clqach8er 28gGlSeZN+2ZSeUJpFUwj5u+rvpKBF4ruHhhId+7b+NGpdt4vOSQVq15MypC6rm3mw4X O5Ag== X-Received: by 10.152.120.70 with SMTP id la6mr26099875lab.65.1429729528757; Wed, 22 Apr 2015 12:05:28 -0700 (PDT) Received: from bass.home.chromatix.fi (188-67-141-134.bb.dnainternet.fi. [188.67.141.134]) by mx.google.com with ESMTPSA id c5sm1290101lac.15.2015.04.22.12.05.18 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 22 Apr 2015 12:05:28 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) From: Jonathan Morton In-Reply-To: <5537EAD8.3060806@orange.com> Date: Wed, 22 Apr 2015 22:05:10 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: References: <14cd9e74e48.27f7.e972a4f4d859b00521b2b659602cb2f9@superduper.net> <20150422040453.GB36239@sesse.net> <1429676935.18561.42.camel@edumazet-glaptop2.roam.corp.google.com> <12383_1429692679_55376107_12383_9099_1_p7gmr0psut68sen0sao8o4lp.1429692550899@email.android.com> <1429710657.18561.68.camel@edumazet-glaptop2.roam.corp.google.com> <25065_1429716388_5537BDA4_25065_2328_1_63pyislbvtjf653k3qt8gw2c.1429715929544@email.android.com> <1429717468.18561.90.camel@edumazet-glaptop2.roam.corp.google.com> <5537CDB7.60301@orange.com> <1429722979.18561.112.camel@edumazet-glaptop2.roam.corp.google.com> <5537DA20.1090008@orange.com> <1429726944.18561.122.camel@edumazet-glaptop2.roam.corp.google.com> <5537EAD8.3060806@orange.com> To: MUSCARIELLO Luca IMT/OLN X-Mailer: Apple Mail (2.2098) Cc: bloat Subject: Re: [Bloat] Pacing --- was DSLReports Speed Test has latency measurement built-in X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 Apr 2015 19:05:59 -0000 > On 22 Apr, 2015, at 21:39, MUSCARIELLO Luca IMT/OLN = wrote: >=20 > Now, I forgot how sch_fq pacing rate is initialized to be effective = from the very first window. IIRC, it=E2=80=99s basically a measurement of the RTT during the = handshake, and you then pace to deliver the congestion window during = that RTT (or, in practice, some large fraction of it). Subsequent = changes in cwnd and RTT alter the pacing rate accordingly. - Jonathan Morton