Re: [quicwg/base-drafts] Loss-detection happens after CC-increase, leading to higher congestion window (#3495)

Christoph Paasch <> Wed, 04 March 2020 18:39 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id A4EE53A1460 for <>; Wed, 4 Mar 2020 10:39:27 -0800 (PST)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -1.554
X-Spam-Status: No, score=-1.554 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, DKIM_VALID_EF=-0.1, HTML_IMAGE_ONLY_20=1.546, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (1024-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id o-SngX6Ms7uz for <>; Wed, 4 Mar 2020 10:39:18 -0800 (PST)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 65FF83A1480 for <>; Wed, 4 Mar 2020 10:39:18 -0800 (PST)
Received: from ( []) by (Postfix) with ESMTP id 08B515213F6 for <>; Wed, 4 Mar 2020 10:39:17 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=pf2014; t=1583347157; bh=nh/Ws9aGlzdViK1ZvTe7UvBhYsnAc9b73+sZGJacyw8=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=ybZ5nMmqXIVRuoKIzi1v0y4FGX8t3oGI4JU8RMGotA50zbs/gAZUXyFIH6WnYtwQS +udFgihIGjyuEftNUlXzbePAhALOigfrPwgYSVZjtWkOKEZNUcv7f+isyWa4Irtgk3 XlFF9Un2KpPRWDpdKEfAz0FQwk5JR3BIOu0mzbtg=
Date: Wed, 04 Mar 2020 10:39:16 -0800
From: Christoph Paasch <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/issues/3495/>
In-Reply-To: <quicwg/base-drafts/issues/>
References: <quicwg/base-drafts/issues/>
Subject: Re: [quicwg/base-drafts] Loss-detection happens after CC-increase, leading to higher congestion window (#3495)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5e5ff5d4eb653_e343fcb7f0cd96c12714a"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: cpaasch
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
Archived-At: <>
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Wed, 04 Mar 2020 18:39:28 -0000

To add to this, this is even more-so true when implementing congestion-window validation. For Section 4.4.1 of RFC7661, one needs an estimate of the flight-size at the time of the loss-event. If we process ACKs before the loss-indication, we will have "lost" the flight-size information.

You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub: