Re: [quicwg/base-drafts] Define under-utilizing the congestion window (#2675)

Marten Seemann <notifications@github.com> Wed, 08 May 2019 01:20 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 CA4C51200A4 for <quic-issues@ietfa.amsl.com>; Tue, 7 May 2019 18:20:23 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.465
X-Spam-Level:
X-Spam-Status: No, score=-6.465 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_20=1.546, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001, T_DKIMWL_WL_HIGH=-0.01] 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 fd81LcVnZm9X for <quic-issues@ietfa.amsl.com>; Tue, 7 May 2019 18:20:21 -0700 (PDT)
Received: from out-5.smtp.github.com (out-5.smtp.github.com [192.30.252.196]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8ABA212004F for <quic-issues@ietf.org>; Tue, 7 May 2019 18:20:21 -0700 (PDT)
Date: Tue, 07 May 2019 18:20:20 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1557278420; bh=3IdYHL2r+JnTFBLHt3p1Ha8hHQWBZ6hF4+kUbgd5cyQ=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=neybcS/HZFprnbtVU1j6BMjKjRZV2CtVUdxop2Fa5eCUcUwo3+UGbtRlVKxJrDZzx GEO35WAIpbc7+CGLJqJGtkdPqtytGbEWlwWTvJ8Anx36SvnxlpK7fi81clS1hrj6CL 4K2RfUxFvA7C55Tzyrwl+3uK6lflae+OjYTy8bTQ=
From: Marten Seemann <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+AFTOJKY3HTSQBUB4WUAF6E5235QVJEVBNHHBUUHC6A@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/pull/2675/review/234828693@github.com>
In-Reply-To: <quicwg/base-drafts/pull/2675@github.com>
References: <quicwg/base-drafts/pull/2675@github.com>
Subject: Re: [quicwg/base-drafts] Define under-utilizing the congestion window (#2675)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5cd22ed470d39_48763fec7b2cd95c87252"; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: marten-seemann
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/56A2FHGcWC8AV-6T11YuMDUWaKA>
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, 08 May 2019 01:20:24 -0000

marten-seemann commented on this pull request.



> @@ -836,9 +836,11 @@ in Linux (3.11 onwards).
 
 ## Under-utilizing the Congestion Window
 
-A congestion window that is under-utilized SHOULD NOT be increased in either
-slow start or congestion avoidance. This can happen due to insufficient
-application data or flow control credit.
+When bytes in flight is smaller than the congestion window and sending is not
+pacing limited, the congestion window is under-utilized.  When this occurs,

Where does the pacing limitation come from? 

-- 
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/2675#pullrequestreview-234828693