From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vc0-x22a.google.com (mail-vc0-x22a.google.com [IPv6:2607:f8b0:400c:c03::22a]) (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 DEF4E21F2CF for ; Mon, 2 Mar 2015 10:35:10 -0800 (PST) Received: by mail-vc0-f170.google.com with SMTP id hq12so11661988vcb.1 for ; Mon, 02 Mar 2015 10:35:09 -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 :cc:content-type; bh=4B4ITEz2G3JPAPyTsEizPV/6qpDjAEKfUEu96x3UeL8=; b=mo0L64vprHq7vHrkvhEzTLRqKTMFFXdIMFj0yJ4eTRTeg/c3rNNdPQEOB4grooxh39 tIuPMfuPs1Fiizh0RggmVPpQ3eGAAlwnfDAwWGIj0u8cdn+/oAphPXkQmUIizbdbcrm5 xM2Dk15ejQlWvh1ITkl8Ou/RH1fcb75zipFxr01ZRZwpza+MeHDDXeQz5ZIQbCpljTpx FKOxW4tv5bVfuTx/7H5yP+U+91fSt0A6Ix3NRw0hyqP7LQXVAyMY0IvnNAP+ibaPosRs t0HQMMK7EghNTN1Z6h6TaHnPDeUCerM5Ziu+DcyHEgyGGjCYxppBPt5KWO+X2XawiVbw WuOA== MIME-Version: 1.0 X-Received: by 10.52.12.138 with SMTP id y10mr25732165vdb.35.1425321309553; Mon, 02 Mar 2015 10:35:09 -0800 (PST) Received: by 10.52.24.79 with HTTP; Mon, 2 Mar 2015 10:35:09 -0800 (PST) Received: by 10.52.24.79 with HTTP; Mon, 2 Mar 2015 10:35:09 -0800 (PST) In-Reply-To: References: <5EDCCC18D27F4F039FA971B3C834A466@srichardlxp2> <20150226151457.75fc898b@urahara> Date: Mon, 2 Mar 2015 20:35:09 +0200 Message-ID: From: Jonathan Morton To: divya singla Content-Type: multipart/alternative; boundary=485b397dd63758ccd90510527a52 Cc: codel@lists.bufferbloat.net Subject: Re: [Codel] About Packet Drop in Codel 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: Mon, 02 Mar 2015 18:35:39 -0000 --485b397dd63758ccd90510527a52 Content-Type: text/plain; charset=UTF-8 In fact, this is the fundamental point of AQM. Dropping (or marking) occasional packets in order to signal congestion to the hosts, which then know to back offand avoid filling the buffer. A related fundamental point is that a full buffer means induced delay - potentially lots of it. Missing those fundamental points will make it very difficult for you to conduct any sort of coherent research into AQM. - Jonathan Morton --485b397dd63758ccd90510527a52 Content-Type: text/html; charset=UTF-8

In fact, this is the fundamental point of AQM. Dropping (or marking) occasional packets in order to signal congestion to the hosts, which then know to back offand avoid filling the buffer.

A related fundamental point is that a full buffer means induced delay - potentially lots of it.

Missing those fundamental points will make it very difficult for you to conduct any sort of coherent research into AQM.

- Jonathan Morton

--485b397dd63758ccd90510527a52--