From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-x230.google.com (mail-qt0-x230.google.com [IPv6:2607:f8b0:400d:c0d::230]) (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 7B71E3BA8E for ; Tue, 3 Oct 2017 23:22:06 -0400 (EDT) Received: by mail-qt0-x230.google.com with SMTP id i13so16803404qtc.11 for ; Tue, 03 Oct 2017 20:22:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=Lvs6Bch/UxyBjPebLGrqXtZ9lkrzLI7GO+MSx/HmG/8=; b=GYsCSHS15xTMDe9Jq4zwuHFcIR0nq4D3XAKkZqCAoY43QpN1K07l9TWK62GliDgo+G RWtBnFF+bOsUVGqjE2TlBa6L4vXKRhKLcpcXZ4E2fw5VhnT1A6cdIuJHMBTVS6tVAkM0 Jw2sYOImkRAQfBhOVPHSSQeZdH/wjwQrWQZl1yMlxS3x2lQHqOFWasU1PVn7eAYZN3Gh 9bsp22JRpO3P1ISI7b9a06XZt/7FF5zX9g7ndIKvl2KEDGpj4rGIx0HHHNAxgJwFzV7/ ETWjPIA8IVK1v4fU+uNTH46j+FptGTRESlAMP+Y/4DKeJoa0cZ4nucvuDLIODb78A1+V VViQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=Lvs6Bch/UxyBjPebLGrqXtZ9lkrzLI7GO+MSx/HmG/8=; b=NsJ0cVOTs72nAiqzopAU44vHaaFVKChBu/giKzlRK1bEtkhN91eDYYIWF4riVmf+id ZO6RnLODkSrffTpoWVfuvmv7UDk1dcFCXksnOXU1lkQyUxralJyMfhXkT4UWhihT83uJ sLvNH5rXwGgE50Z47+q8fENzB9zvyGSjV9Q86mc2j9tdGSzsCJ9Rry2EMLYs7ZoSrPnt 0/uI62mMF643r+dQhmvGsquFo5+TUdxu3piSvX2x+2mCrWLvXUFHfgsJPzy6d70V1vMs zz01IFjWBHkom8haCVh9UU5MFowZYmijJCE5oVwyZRP4NHk2+gbtF2f2FrsG9YcM4XD9 4Ung== X-Gm-Message-State: AMCzsaXllryoG01BHh+K0RJXY0yLcWABnwmUVsuB4uKdquO+PBNwFf8n 8WCwBhUtHGPQY3Ikc9XEYvnoL2V3dMjbGUrxOO4= X-Google-Smtp-Source: AOwi7QDgp76ALP1QygecZoNzqYKQ6xC9/4VP4etEpmCjnDoqmUmANBpfr9DOIZmvaPv91GRBrghF8IUooN2F/dfq3hs= X-Received: by 10.200.13.198 with SMTP id t6mr8977104qti.25.1507087326107; Tue, 03 Oct 2017 20:22:06 -0700 (PDT) MIME-Version: 1.0 Received: by 10.140.93.227 with HTTP; Tue, 3 Oct 2017 20:22:05 -0700 (PDT) Received: by 10.140.93.227 with HTTP; Tue, 3 Oct 2017 20:22:05 -0700 (PDT) In-Reply-To: <198aa7d2-246d-40c2-fd46-89979fa249d4@gmail.com> References: <198aa7d2-246d-40c2-fd46-89979fa249d4@gmail.com> From: Jonathan Morton Date: Wed, 4 Oct 2017 06:22:05 +0300 Message-ID: To: Noah Causin Cc: Cake List Content-Type: multipart/alternative; boundary="089e08229880b7dda1055ab01ce3" Subject: Re: [Cake] best way at getting at tcp ack data? 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, 04 Oct 2017 03:22:06 -0000 --089e08229880b7dda1055ab01ce3 Content-Type: text/plain; charset="UTF-8" No, because acks are cumulative. Dropping an ack doesn't normally trigger any retransmissions, and is actually difficult to detect reliably at the sender. - Jonathan Morton --089e08229880b7dda1055ab01ce3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

No, because acks are cumulative.=C2=A0 Dropping an ack doesn= 't normally trigger any retransmissions, and is actually difficult to d= etect reliably at the sender.

- Jonathan Morton

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