From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x22d.google.com (mail-qk0-x22d.google.com [IPv6:2607:f8b0:400d:c09::22d]) (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 3C7D921FBE1 for ; Wed, 16 Dec 2015 04:01:55 -0800 (PST) Received: by mail-qk0-x22d.google.com with SMTP id p187so59330008qkd.1 for ; Wed, 16 Dec 2015 04:01:55 -0800 (PST) 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 :content-type; bh=8CH5FOBLPO4Im/Zb0Br6fjRCUQ4tMB9sfc5Rj/V9Cwk=; b=lD++a5PFaD1wLFR5LMwIxHIJ7Q6HL3Ti0UfWsN4S1rix/VTpgkqINqXY+GdBSHjuMv b2GHVODPLfFx0xV4//I/dpfWERvgPOfywpUY+iuR0HzkINMriYLeIlG3N+1w1AX3/RyM /fV28WGIFpdyNydeLN0ULdfpuKYN3Akcj0hrUz3GaPSMeoVRZ29jN1DGPAEVSxeHJ/uq 52nbMrbMb0DQ8Ewn78VxTBVEnSOwn+on9UaYX2Dd2GCG0QlqyaUwzRqFo5+JhmSDKsYr JuQ+lF47g6mqjXyXjPOAjfS4h1G+dKSmoRNhJluZr4+mDSF/C4YHmCAwQQt0itv0tz30 EE6w== MIME-Version: 1.0 X-Received: by 10.129.77.68 with SMTP id a65mr18341047ywb.180.1450267314278; Wed, 16 Dec 2015 04:01:54 -0800 (PST) Received: by 10.37.112.6 with HTTP; Wed, 16 Dec 2015 04:01:54 -0800 (PST) In-Reply-To: <6545444AE21C2749939E637E56594CEA3C10FA8B@gsp-ex02.ds.swin.edu.au> References: <6545444AE21C2749939E637E56594CEA3C10FA8B@gsp-ex02.ds.swin.edu.au> Date: Wed, 16 Dec 2015 13:01:54 +0100 Message-ID: From: Dave Taht To: "codel@lists.bufferbloat.net" Content-Type: text/plain; charset=UTF-8 Subject: [Codel] Fwd: [aqm] An independent implementation of CoDel in FreeBSD/ipfw/dummynet X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Dec 2015 12:02:18 -0000 ---------- Forwarded message ---------- From: Rasool Al-Saadi Date: Wed, Dec 16, 2015 at 12:35 PM Subject: [aqm] An independent implementation of CoDel in FreeBSD/ipfw/dummynet To: "aqm@ietf.org" Hello all, I am Rasool Al-Saadi, a PhD student at Centre for Advanced Internet Architectures - Swinburne University of Technology. I and my supervisor Grenville Armitage are implementing CoDel (and eventually PIE, FQ_CoDel and FQ_PIE) in FreeBSD targeting ipfw/dummynet framework as a small project funded by Comcast Corporation, USA. We used CoDel I-D (https://datatracker.ietf.org/doc/draft-ietf-aqm-codel/) as the main source to implement CoDel and we believe that the information in the latest draft (draft-ietf-aqm-codel-02) sufficient and the pseudo-code is straightforward to create functional CoDel code. However, we have some questions/confusion regarding CoDel I-D: 1- There is little confusion in the text. In section 3.3, the text says "... the initial drop spacing SHOULD be set to the estimator's interval plus twice the target (i.e., initial drop spacing = 1.1 * interval) ...", while in section 4.1, the text says "As discussed in section 3.3, the initial next drop spacing is intended to be long enough to give the endpoints time to react to the single drop so SHOULD be set to a value of 1.0 to 1.1 times the interval." 2- In section 3.2 and 4.4, the text says the ideal setpoint is 5-10% of the interval (connection RTT). So, should we allow the user to specify the target value as a percentage of the interval or an absolute value? Regards, Rasool _______________________________________________ aqm mailing list aqm@ietf.org https://www.ietf.org/mailman/listinfo/aqm