IETF Logo Mail Archive

Re: [quicwg/base-drafts] ACK of ACK are useful (#2546)

Jana Iyengar <notifications@github.com> Wed, 03 April 2019 19:47 UTC

Return-Path: <bounces+848413-a050-quic-issues=ietf.org@sgmail.github.com>
X-Original-To: quic-issues@ietfa.amsl.com
Delivered-To: quic-issues@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 66776120613 for <quic-issues@ietfa.amsl.com>; Wed, 3 Apr 2019 12:47:42 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.001
X-Spam-Level:
X-Spam-Status: No, score=-3.001 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=github.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5aE2q0byw-8E for <quic-issues@ietfa.amsl.com>; Wed, 3 Apr 2019 12:47:40 -0700 (PDT)
Received: from o4.sgmail.github.com (o4.sgmail.github.com [192.254.112.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 75BC3120612 for <quic-issues@ietf.org>; Wed, 3 Apr 2019 12:47:40 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=github.com; h=from:reply-to:to:cc:in-reply-to:references:subject:mime-version:content-type:content-transfer-encoding:list-id:list-archive:list-post:list-unsubscribe; s=s20150108; bh=vVRADLFg/EgJT+59+L2cyk/HszM=; b=c2T5JWBPKo3zr6HQ OztomV07lEJlGabfawClVQ95sppBkUHaoTVCiYLVgp+IoK9tfXKb3Op6CSa48ohj NdvjX1PYf7ZOZOTNpVhdf57ukd702w1Um4edeBfcPvEMLBL+7PlfDMCZXuWm51vp Wn9kixxcAj2pQaSpW7+0W5bMzyI=
Received: by filter0356p1iad2.sendgrid.net with SMTP id filter0356p1iad2-6975-5CA50DDB-2A 2019-04-03 19:47:39.558402295 +0000 UTC m=+1642005.604449143
Received: from github-lowworker-20a34ff.cp1-iad.github.net (unknown [192.30.252.43]) by ismtpd0014p1iad2.sendgrid.net (SG) with ESMTP id eaeizEwYSlC8jKjbnIDMJQ for <quic-issues@ietf.org>; Wed, 03 Apr 2019 19:47:39.568 +0000 (UTC)
Received: from github.com (localhost [127.0.0.1]) by github-lowworker-20a34ff.cp1-iad.github.net (Postfix) with ESMTP id 8789E3400FA for <quic-issues@ietf.org>; Wed, 3 Apr 2019 12:47:39 -0700 (PDT)
Date: Wed, 03 Apr 2019 19:47:39 +0000
From: Jana Iyengar <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+0166e4aba5d26b101dec1fd321f7aed22b61fc199d9a627192cf0000000118bccfdb92a169ce194d6f49@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/issues/2546/479632819@github.com>
In-Reply-To: <quicwg/base-drafts/issues/2546@github.com>
References: <quicwg/base-drafts/issues/2546@github.com>
Subject: Re: [quicwg/base-drafts] ACK of ACK are useful (#2546)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5ca50ddb85984_6d623fbe3d2d45c01474ad"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: janaiyengar
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-GitHub-Recipient-Address: quic-issues@ietf.org
X-SG-EID: l64QuQ2uJCcEyUykJbxN122A6QRmEpucztpreh3Pak2Np9h7IO+Y/cu1WY7abh/YJdKSXjSeDaaXfy ub+rvbv82v1ejXXfb5NYMuG3QpNQyOCdyfRc21RahVg3AYbNNnBf4rUMQR3nvyppG15wqnVX+JdCUo qHJckDaq1UKCESWJIdsmOGM1ime+3TDUFcQQilHkCr/gKHnSZi7ny3MOx6LolPKf9sYuqD+VkQo0YF A=
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic-issues/UfnEpKdDj8D2PZcfPbLKUCDHpZg>
X-BeenThere: quic-issues@ietf.org
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <quic-issues.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic-issues/>
List-Post: <mailto:quic-issues@ietf.org>
List-Help: <mailto:quic-issues-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Apr 2019 19:47:42 -0000

Agreed with @ianswett. Irrespective of what we recommend here, note that a sender of ACKs cannot assume what the peer will do -- when the peer will send an ACK for ACKs, I mean -- so, it will end up having to send a periodic PING anyways. Piggybacking a PING periodically (once an RTT, for example) is useful for RTT measurement as well, since ACK of ACKs do not get used for RTT (see #2568 for more discussion on this point).

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/quicwg/base-drafts/issues/2546#issuecomment-479632819

v2.23.0 | Report a Bug | By Email