IETF Logo Mail Archive

Re: [tcpm] Linux doesn’t implement RFC3465

Vidhi Goel <vidhi_goel@apple.com> Mon, 02 August 2021 23:02 UTC

Return-Path: <vidhi_goel@apple.com>
X-Original-To: tcpm@ietfa.amsl.com
Delivered-To: tcpm@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 32E773A2034 for <tcpm@ietfa.amsl.com>; Mon, 2 Aug 2021 16:02:13 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.548
X-Spam-Level:
X-Spam-Status: No, score=-2.548 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.452, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=apple.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 zeApbukSa1eU for <tcpm@ietfa.amsl.com>; Mon, 2 Aug 2021 16:02:08 -0700 (PDT)
Received: from rn-mailsvcp-ppex-lapp44.apple.com (rn-mailsvcp-ppex-lapp44.rno.apple.com [17.179.253.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 52F2D3A202D for <tcpm@ietf.org>; Mon, 2 Aug 2021 16:02:08 -0700 (PDT)
Received: from pps.filterd (rn-mailsvcp-ppex-lapp44.rno.apple.com [127.0.0.1]) by rn-mailsvcp-ppex-lapp44.rno.apple.com (8.16.1.2/8.16.1.2) with SMTP id 172Mwq6s027837; Mon, 2 Aug 2021 16:02:03 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=apple.com; h=from : message-id : content-type : mime-version : subject : date : in-reply-to : cc : to : references; s=20180706; bh=cn2mf+WeN7AmRLaugqdFaoRUlcqCCRswHcAnBb25rUg=; b=Y/vpOL2RptlmyWkAvx8ZLjXtqpvxEef7dupgFxXM8puZ7tpXDF2QhlvszQIfA3awyQ5j YLY4Q5zKwOnyHBB81EcvO255zeSEhccJ4UfjzoOUYV378eIxf11dg3tx9i44icHXorRy UfGzWXOOZ4fulScf40PD4Z0RHmxf1ulw8y2XY/SLuPhkJSyAZEQnYblXuwEICygQ6Nvr o5ra2uo0o5eNv+WVD78Fd80N08g20bL73cD8SfcHt1SMbSZuMqcbbj8J9JY8wfycvMy2 ADlZL+/pBXrFgxPbm4hCI9BKvhsuRZ7KB8V0J7lokpud88eOJeFQIVAff4s2AEWAOIDC LQ==
Received: from rn-mailsvcp-mta-lapp01.rno.apple.com (rn-mailsvcp-mta-lapp01.rno.apple.com [10.225.203.149]) by rn-mailsvcp-ppex-lapp44.rno.apple.com with ESMTP id 3a5219amwr-6 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO); Mon, 02 Aug 2021 16:02:03 -0700
Received: from rn-mailsvcp-mmp-lapp04.rno.apple.com (rn-mailsvcp-mmp-lapp04.rno.apple.com [17.179.253.17]) by rn-mailsvcp-mta-lapp01.rno.apple.com (Oracle Communications Messaging Server 8.1.0.9.20210415 64bit (built Apr 15 2021)) with ESMTPS id <0QX800AHWINEU140@rn-mailsvcp-mta-lapp01.rno.apple.com>; Mon, 02 Aug 2021 16:02:03 -0700 (PDT)
Received: from process_milters-daemon.rn-mailsvcp-mmp-lapp04.rno.apple.com by rn-mailsvcp-mmp-lapp04.rno.apple.com (Oracle Communications Messaging Server 8.1.0.9.20210415 64bit (built Apr 15 2021)) id <0QX800K00IKYIU00@rn-mailsvcp-mmp-lapp04.rno.apple.com>; Mon, 02 Aug 2021 16:02:02 -0700 (PDT)
X-Va-A:
X-Va-T-CD: 2d682d06d4452f7f842383a701a46700
X-Va-E-CD: 8ad83cf34a8c3732cb73dea81270d36d
X-Va-R-CD: 2eec4d4b333905bf2498bde820845c7b
X-Va-CD: 0
X-Va-ID: fd43eb25-8f38-4483-a16a-99c126eb7c1c
X-V-A:
X-V-T-CD: 2d682d06d4452f7f842383a701a46700
X-V-E-CD: 8ad83cf34a8c3732cb73dea81270d36d
X-V-R-CD: 2eec4d4b333905bf2498bde820845c7b
X-V-CD: 0
X-V-ID: 275add98-7917-4267-bcbc-495e339528c2
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-08-02_07:2021-08-02, 2021-08-02 signatures=0
Received: from smtpclient.apple (unknown [17.234.77.243]) by rn-mailsvcp-mmp-lapp04.rno.apple.com (Oracle Communications Messaging Server 8.1.0.9.20210415 64bit (built Apr 15 2021)) with ESMTPSA id <0QX800KK2IND3200@rn-mailsvcp-mmp-lapp04.rno.apple.com>; Mon, 02 Aug 2021 16:02:02 -0700 (PDT)
From: Vidhi Goel <vidhi_goel@apple.com>
Message-id: <76891287-22E6-4071-87C4-8F3A1FD3C2D1@apple.com>
Content-type: multipart/alternative; boundary="Apple-Mail=_12BC5114-13BC-4AB3-B6AD-5F203F28E8B6"
MIME-version: 1.0 (Mac OS X Mail 14.0 \(3654.100.0.2.11\))
Date: Mon, 02 Aug 2021 16:02:01 -0700
In-reply-to: <CADVnQynWSCpEBeEtHL0JHCBYwyymX0vku_VbfeDQ_snUoCX=ZA@mail.gmail.com>
Cc: Yuchung Cheng <ycheng@google.com>, Mark Allman <mallman@icir.org>, Extensions <tcpm@ietf.org>
To: Neal Cardwell <ncardwell@google.com>
References: <78EF3761-7CAF-459E-A4C0-57CDEAFEA8EE@apple.com> <CADVnQynkBxTdapXN0rWOuWO3KXQ2qb6x=xhB35XrMU38JkX2DQ@mail.gmail.com> <601D9D4F-A82C-475A-98CC-383C1F876C44@apple.com> <54699CC9-C8F5-4CA3-8815-F7A21AE10429@icsi.berkeley.edu> <DF5EF1C7-0940-478A-9518-62185A79A288@apple.com> <E150D881-4AB3-4AEA-BE0C-1D4B47B2C531@icir.org> <CADVnQynjE+D-OSvdOVROjT3y1cnHHWqdNQSmphLAJ+HsBTUAJQ@mail.gmail.com> <A1B50403-2405-4348-9626-025D255DEAE7@icir.org> <CADVnQykM8p-bVz_oPrje1yNh9_7_isAUL+wnQWDoY9Gs18sLPQ@mail.gmail.com> <11FE4818-87E7-4FD8-8F45-E19CD9A3366A@apple.com> <CAK6E8=fFWAE_NSr45i2mdh6NmYDusUFW3GYGtuo-FcL07sox9A@mail.gmail.com> <D6B865F7-9865-4B6F-986B-F44ABE5F12B0@apple.com> <756432D9-4331-454D-82EB-346CF54A355E@icir.org> <CAK6E8=c+KeQxWJq0e98hY9XsQ2vhdr3SiKkypC7kwdZbBRgdXA@mail.gmail.com> <A39F73BE-4BF1-479D-911F-0CAC6D91D924@icir.org> <CAK6E8=eEnVtMNBpu0noFAud4BTWdupCH+QY1beFjTtD9ADkK5g@mail.gmail.com> <CADVnQynWSCpEBeEtHL0JHCBYwyymX0vku_VbfeDQ_snUoCX=ZA@mail.gmail.com>
X-Mailer: Apple Mail (2.3654.100.0.2.11)
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-08-02_07:2021-08-02, 2021-08-02 signatures=0
Archived-At: <https://mailarchive.ietf.org/arch/msg/tcpm/GQ4fQ0vU3ljT13P9jHcnG1xDEI8>
Subject: Re: [tcpm] Linux doesn’t implement RFC3465
X-BeenThere: tcpm@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: TCP Maintenance and Minor Extensions Working Group <tcpm.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tcpm>, <mailto:tcpm-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tcpm/>
List-Post: <mailto:tcpm@ietf.org>
List-Help: <mailto:tcpm-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tcpm>, <mailto:tcpm-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 02 Aug 2021 23:02:13 -0000

> On Mon, Aug 2, 2021 at 3:37 PM Mark Allman <mallman@icir.org <mailto:mallman@icir.org>> wrote:
> 
> > The fact is that Linux CC has long moved to infinite L since 2031,
> 
> So, if our experience is with L=\infinity and it is demonstrably OK
> why don't we say *THAT* instead of "make L=5 or L=10"?  I would
> submit that it makes more sense to leverage experience than it does 
> to make things up.
> +1
> 
> Yes, I agree that would be a great approach to take.

So, we are saying it is fine to ignore L completely and simply increase cwnd by bytes_acked during slow start? And if this causes large bursts to be sent out (when an implementation doesn’t do pacing), that is fine? 

-
Vidhi

> On Aug 2, 2021, at 3:56 PM, Neal Cardwell <ncardwell@google.com> wrote:
> 
> 
> 
> On Mon, Aug 2, 2021 at 6:46 PM Yuchung Cheng <ycheng@google.com <mailto:ycheng@google.com>> wrote:
> 
> 
> On Mon, Aug 2, 2021 at 3:37 PM Mark Allman <mallman@icir.org <mailto:mallman@icir.org>> wrote:
> 
> > The fact is that Linux CC has long moved to infinite L since 2031,
> 
> So, if our experience is with L=\infinity and it is demonstrably OK
> why don't we say *THAT* instead of "make L=5 or L=10"?  I would
> submit that it makes more sense to leverage experience than it does 
> to make things up.
> +1
> 
> Yes, I agree that would be a great approach to take.
> 
> neal
> 
>

v2.23.0 | Report a Bug | By Email