Re: [quicwg/base-drafts] Skip a packet number when sending one PTO packet (#2952)

Kazuho Oku <notifications@github.com> Tue, 06 August 2019 07:11 UTC

Return-Path: <noreply@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 8E25912013B for <quic-issues@ietfa.amsl.com>; Tue, 6 Aug 2019 00:11:44 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.596
X-Spam-Level:
X-Spam-Status: No, score=-6.596 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_IMAGE_ONLY_28=1.404, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, 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 WavbjSGD16WC for <quic-issues@ietfa.amsl.com>; Tue, 6 Aug 2019 00:11:42 -0700 (PDT)
Received: from out-20.smtp.github.com (out-20.smtp.github.com [192.30.252.203]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AD4E3120137 for <quic-issues@ietf.org>; Tue, 6 Aug 2019 00:11:42 -0700 (PDT)
Date: Tue, 06 Aug 2019 00:11:41 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1565075501; bh=6GtJvlhmZ7Kwv9sIJEw2BoBf/SREywRYY0ctrEjCY/U=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=OVLzvGm9QSV1Hk300bAXb6YJzMhqmll7YmB2WyFb+CcUBfT5hlYqQW37xC0wIkWZ6 Ts+WY58jtdAvXvCuedzCFVgbD9ZG91/Ho/8nmowwgUoxFDOJCheCjh9v6MeGaBFuWC JndpSz9LHBW6BVWnoE2hv2s+bANrNWnn3wubIeAg=
From: Kazuho Oku <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJK5QBAJGYHHEETZGYKV3KZNK3EVBNHHBYY33OM@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/pull/2952/review/271152773@github.com>
In-Reply-To: <quicwg/base-drafts/pull/2952@github.com>
References: <quicwg/base-drafts/pull/2952@github.com>
Subject: Re: [quicwg/base-drafts] Skip a packet number when sending one PTO packet (#2952)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5d49282dc7bf9_1c9a3fc4c44cd95c27209f"; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: kazuho
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-GitHub-Recipient-Address: quic-issues@ietf.org
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic-issues/h5GF-LEAvGLIO8vQXz8xep3srLQ>
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: Tue, 06 Aug 2019 07:11:45 -0000

kazuho commented on this pull request.



> @@ -601,7 +601,9 @@ removed from bytes in flight when the Initial and Handshake keys are discarded.
 When a PTO timer expires, a sender MUST send at least one ack-eliciting packet
 as a probe, unless there is no data available to send.  An endpoint MAY send up
 to two full-sized datagrams containing ack-eliciting packets, to avoid an
-expensive consecutive PTO expiration due to a single lost datagram.
+expensive consecutive PTO expiration due to a single lost datagram.  When only
+sending a single packet on PTO, senders can skip a packet number to elicit a
+faster acknowledgement.
 

The term is defined in [section 2](https://quicwg.org/base-drafts/draft-ietf-quic-recovery.html#rfc.section.2).

-- 
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/pull/2952#discussion_r310910804