From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-1.mimecast.com (us-smtp-2.mimecast.com [207.211.31.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 406103B29D for ; Wed, 6 May 2020 15:08:49 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588792129; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AC4F7Yshzm5emRobnUcT/LRPCJdZHrRCiO37EJ/wyRY=; b=MThL9UJm2nZsVuyab7ldcx61azME7ykUqSSj/B4Vpk4M41kbs+h4BgiQNW73SFNqRGS10h rzCmryO/n2g7S18rxZeFZ3NzntprHFVZoPHpeQC+0W99pAgBJ2NlW8dYc38PNC5XrqIsef dtcOxGv03c6TGrdLcLnBsr/cjZtD60A= Received: from mail-lf1-f71.google.com (mail-lf1-f71.google.com [209.85.167.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-467-GhllVCwZMKaYhbIu1B6cRA-1; Wed, 06 May 2020 15:08:44 -0400 X-MC-Unique: GhllVCwZMKaYhbIu1B6cRA-1 Received: by mail-lf1-f71.google.com with SMTP id c7so1198991lfp.13 for ; Wed, 06 May 2020 12:08:44 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=zrEBmdQ77AgNk/nmRsQpnkkCNDGkc2u1NNrrn7xrlvE=; b=aWTJWcUiM1axZdMArNlYWZgLsSQZKD25oUzjaECfvh46FGBEB17tQbwdge++yYusLd LtV1bHOltA3UDYj936YgPHEKjdQHHH1Hto/1qt9isSdzBhygIp4iN2hXsYKTpPCnG55q kglTiGuXbTWl5oFMnEolJU2uaFDEhuWPFWrarGP1AytlQJsSpRht9so39oFeiSkdX5k8 RQ2MwkQpMBNfm6CwaO7TT6AZFybbOPJ4Ew+efB0j7QRJqEb85tR+wwhLtugrxmf8S5en ynCe9dlHrsNFKyERSINr7WnFmsL/A9PzlHXVx+y37xejJm4OlzvyWUWZCPHOKdG5so2+ z5Yg== X-Gm-Message-State: AGi0PubweOSlTbTDg9T4u+rMCzi8lT4WNOt1MlOPij6bC7HiTrNcZsvg LhVIgqZr8S20vBM/XKHjQ8iFzitBskIrQKloKyc0GH8piFMD2ovW8XPnMNtY/h5Gg2ISfcctTFL VTGYY7J0wnYWRteUN4KYqoQ== X-Received: by 2002:a2e:99cc:: with SMTP id l12mr6136109ljj.290.1588792123165; Wed, 06 May 2020 12:08:43 -0700 (PDT) X-Google-Smtp-Source: APiQypLuoUIZqPtI7PQLn84fbfu1Cp9FyaKhYI2IC7PujKABZNezvI84hjstPVTOoosHWa1l3uD3GQ== X-Received: by 2002:a2e:99cc:: with SMTP id l12mr6136096ljj.290.1588792122940; Wed, 06 May 2020 12:08:42 -0700 (PDT) Received: from alrua-x1.borgediget.toke.dk ([2a0c:4d80:42:443::2]) by smtp.gmail.com with ESMTPSA id t16sm1900312ljo.6.2020.05.06.12.08.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 May 2020 12:08:42 -0700 (PDT) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id 529EB1804E9; Wed, 6 May 2020 21:08:40 +0200 (CEST) From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= To: Avakash bhat , cake@lists.bufferbloat.net Cc: "Mohit P. Tahiliani" , Shrinidhi Varna , Deepak K , Vybhav Pai In-Reply-To: References: X-Clacks-Overhead: GNU Terry Pratchett Date: Wed, 06 May 2020 21:08:40 +0200 Message-ID: <87zhakkhjb.fsf@toke.dk> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Subject: Re: [Cake] Query on ACK 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: Wed, 06 May 2020 19:08:49 -0000 Avakash bhat writes: > Hi all, > > We are trying to implement the ACK filtering module of CAKE in ns-3 > (Network Simulator). > > We had a question on the working of ack filtering. > If an incoming ack which can replace an eligible ack in the queue is abou= t > to be enqueued, do we replace the ack in the queue with the incoming ack > or do we enqueue the ack to the tail of the queue and remove the eligible > ack from the queue? Enqueue the new ACK at the tail, drop the eligible one already in the queue. -Toke