From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x229.google.com (mail-lf0-x229.google.com [IPv6:2a00:1450:4010:c07::229]) (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 9BD8C3CB36 for ; Thu, 4 Jan 2018 10:01:11 -0500 (EST) Received: by mail-lf0-x229.google.com with SMTP id c19so2059125lfg.3 for ; Thu, 04 Jan 2018 07:01:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=6OGg5BLBV3+VfOVUFm/2iWwECUT4pR5CycFQQ4B0N3w=; b=PEy0Nf1kzgyAidl9jBgWK0r+YolUWnl0YegkitO3orbWDLDnRJMrvvXJwMwmL/gVrI IfKtaoBCOhT4H82MEmXuLZiS+E3Fali5ulQqZmIeui51ZjinUGjC1t6hWA4ccIAXHgkQ 5cPNI3LhJFoGkpb38cagzzK0tliY2Z58g8JqmAjeP5mjWvGoRvqO5ordEwKaV1Njp8r2 GnlvE5S45MiZp37+ap6QrI6g8WEBfjgq9El0DZ555gFMK6Fxf4TIoatpw/MmzNZsjVXi eTASTOjhAVzUWM4VZpW8e5I6KWcVOYUs+UdK8aCOC+FgmeT28AfRn6VoBT5tKENj16Lk BOQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=6OGg5BLBV3+VfOVUFm/2iWwECUT4pR5CycFQQ4B0N3w=; b=jVIG1fDnA0uaIjnwEIEdmlgdV57NN1WmBvsoCk9ZmaoghTx5Ass5En9iZVkFtYXGo0 ba1zx1fUNvXLx79EIy2lxZWkxX4x2a1CeqsJdlLgS0Q02dzlLB8cvD0p0IgEpb/74tIS owDYVmRsfI1e87Wtnty8RGAXhD++R647Uw5HKXLuvBlDOgvl0gzpiDc4WnWG2i9aYweY h/yCC4gpYNg0y+KSzwSs0AGdsquClNIYQksvDAtLkzaS/GsF3vye/RQeBcVWLiBF7TEv QYAySMBDtn8JXTOGfZHOwresrR7B9EUJ6+V5LpnjRypwA/4wp49F18yktOCjeIKPdpgY THAg== X-Gm-Message-State: AKGB3mJEJmeotzlQ/XyVOMI79/eZktWqgheE5RzAHETRmqv6VQ0bBFq0 WVlNSrLgzTkyH8LuEvamLpI= X-Google-Smtp-Source: ACJfBot/zxTZE7a7o1WDlPoPYMaVLkCYii68JYkpVH1n4jiubmTU6U/fxJlWIAWVI68IoW0E2j4f1g== X-Received: by 10.46.66.216 with SMTP id h85mr3223204ljf.108.1515078070582; Thu, 04 Jan 2018 07:01:10 -0800 (PST) Received: from [192.168.239.216] (mobile-access-bceee7-52.dhcp.inet.fi. [188.238.231.52]) by smtp.gmail.com with ESMTPSA id p89sm656569ljp.33.2018.01.04.07.01.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 04 Jan 2018 07:01:10 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.2 \(3445.5.20\)) From: Jonathan Morton In-Reply-To: <87bmi97l3w.fsf@toke.dk> Date: Thu, 4 Jan 2018 17:01:07 +0200 Cc: cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: References: <87bmi97l3w.fsf@toke.dk> To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Mailer: Apple Mail (2.3445.5.20) Subject: Re: [Cake] Modification of DRR with deficit saving 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: Thu, 04 Jan 2018 15:01:11 -0000 > On 4 Jan, 2018, at 4:29 pm, Toke H=C3=B8iland-J=C3=B8rgensen = wrote: >=20 > This popped up in my Google Scholar notifications: >=20 > https://atlas.informatik.uni-tuebingen.de/~menth/papers/Menth18b.pdf >=20 > Basically, they are proposing to permit a queue to accumulate a larger > deficit while empty to allow light users to achieve the same = throughput > as heavy users (users being an endpoint with potentially multiple > flows). >=20 > Not sure how useful this really is, but it's somewhat related to = Cake's > src/dst user fairness feature, so may be of interest. They're trying to solve the same problem as DRR++ does, not the same one = as Triple Isolation does. As a result, they've basically proposed a bugfix to the original DRR = (ie. you should keep replenishing the deficit until it saturates, even = if the queue is temporarily empty), without gaining the full benefit of = DRR++. Not interesting at all. - Jonathan Morton