From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-fx0-f43.google.com (mail-fx0-f43.google.com [209.85.161.43]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 06DDA201A70 for ; Sat, 7 May 2011 09:33:59 -0700 (PDT) Received: by fxm3 with SMTP id 3so4706173fxm.16 for ; Sat, 07 May 2011 09:39:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:subject:mime-version:content-type:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to:x-mailer; bh=ZiSqblalBDE6ufzXYITQBJ/LPtNq46fqP1Con0tp1Ec=; b=HDSTXczT0T1USxCBP+7W3T6lZGjMTOhRthCttJGrL/+au4SdX52pl1oXY5ddm9me1U pYmCw7erISUelXD5rzUDSXTwEaeEiZvgRDdvXCgpK2XM3q5WQIBvm8zpQssd3xyLHrw5 0RVDLyT/YvXONeg5E+RAxQ32qvXanmiVfSdao= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer; b=tGbKcvjgkpxsPOhYToMpTwPLeZmHZBWrVOSJ13bntpFAugPR0G69MHfP3Uy2y7wgGo U1KK6lfB7l7SkNuw3sw6EQrPmAddPyfgXRX0VygEXOMFXAUo3Ip22+scMwiat+MHqE4s sIHzBhEVJkvDJ+wfo16Pnw4o8qS9g5rRa9OZ8= Received: by 10.223.52.7 with SMTP id f7mr1867883fag.16.1304786366483; Sat, 07 May 2011 09:39:26 -0700 (PDT) Received: from [192.168.239.42] (xdsl-83-150-84-172.nebulazone.fi [83.150.84.172]) by mx.google.com with ESMTPS id 6sm1428839fae.13.2011.05.07.09.39.24 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 07 May 2011 09:39:25 -0700 (PDT) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: Jonathan Morton In-Reply-To: <20110506151003.2d2a4af3@nehalam> Date: Sat, 7 May 2011 19:39:22 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: References: <4DB70FDA.6000507@mti-systems.com> <4DC2C9D2.8040703@freedesktop.org> <1EA9A6B3-F1D0-435C-8029-43756D53D8FD@gmail.com> <1304694852.29492.16.camel@amd.pacdat.net> <20110506151003.2d2a4af3@nehalam> To: Stephen Hemminger X-Mailer: Apple Mail (2.1084) Cc: bloat@lists.bufferbloat.net Subject: Re: [Bloat] Goodput fraction w/ AQM vs bufferbloat 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: Sat, 07 May 2011 16:34:00 -0000 On 7 May, 2011, at 1:10 am, Stephen Hemminger wrote: > Rate <=3D (MSS/RTT)*(1 / sqrt{p}) >=20 > where: > Rate: is the TCP transfer rate or throughputd > MSS: is the maximum segment size (fixed for each Internet path, = typically 1460 bytes) > RTT: is the round trip time (as measured by TCP) > p: is the packet loss rate.=20 So if the loss rate is 1.0 (100%), the throughput is MSS/RTT. If the = loss rate is 0, the throughput goes to infinity. That doesn't seem = right to me. - Jonathan