From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-il1-x130.google.com (mail-il1-x130.google.com [IPv6:2607:f8b0:4864:20::130]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 52B683B2A4 for ; Sat, 16 May 2020 14:17:07 -0400 (EDT) Received: by mail-il1-x130.google.com with SMTP id l20so5831584ilj.10 for ; Sat, 16 May 2020 11:17:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :content-transfer-encoding; bh=N8oGbqQ7zIcEIiq4SrJslq8y4loxBQCGGXFOOeThbBs=; b=PTSbpA8YF+DSP0Gvfn27Om44khrTXJ743O/QPZ5Igi5Moa0Vkb7E3+Z/Ul84c1mUvK v53F2+H4JCeR7Q63ZG3DeObHfTDWJvdOAgq5ksZlCyvjgfk78zWKiKoVoJaJzOypU2pQ 3BARiZD6AHBYVh6HULW2u9hFnvPi6Sxb+XqgdIDylaklPZy9rPaDcjI7yYra4446g+j8 1K8EduwsvuPib2/nkKiB84EFZDV+DD3nt+M5C9zjUeBDsN2zNLCttAgdob3fA77LTorL Nf+yiuSrwf5r4+c6N19vDhiBHYJlVbnUiB08qmgdUVnOF+I5ryzD/rk94eTzvibIjdXJ XZag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-transfer-encoding; bh=N8oGbqQ7zIcEIiq4SrJslq8y4loxBQCGGXFOOeThbBs=; b=dtgmu/MksB09T8BBT7H1iG9N6ggopVByMVbKH0QykBD3fYfI383z2bU3xwXkm/7GkM cdxPpysRxk7/aM8lztYREkqDuM/lR4BtlpyjCVo++60Su8rgL4HjHCzCoKgNr8Rcfbbi pNPLCNrV1mwMk6Q5+n+Ata9T4mLpbK98LHcfvr3+0P3Lw8hIGPYTe2XmzEwfQkxzIn+W 6g7/lLO5bR1fmG8WluIyZfNQgk6CKtTH0laVq4N0cf50KVAT19SD/I/lgwUevo3Sa0zS IjJRekWagFfO1mmk+ObfPPEksuMrFnFPuESIFhBv8DEroqxAtJQscLYU8DWYpfyp3OLt 4H3w== X-Gm-Message-State: AOAM531/pmby5LeF62q8+WRWNUsSb7hpTEVB4tWUYi57LOXBfC2rGNk/ 9g4Rr7uWyj+696crtTmUdC1W2J+ATEzci+qzZQ2fE2F+ X-Google-Smtp-Source: ABdhPJxF1YRow/YPAFjsf7y1A5Qb8V7f2bsjCGNaPbHMdwGoNkW/YyB18Iq2qIK2N618SIpOXCKK6bQBnuAPuxD6fGE= X-Received: by 2002:a92:8d4d:: with SMTP id s74mr7851992ild.287.1589653026637; Sat, 16 May 2020 11:17:06 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Sat, 16 May 2020 11:16:54 -0700 Message-ID: To: ECN-Sane Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Ecn-sane] some l4s and sce gsoc work items planned for ns3 X-BeenThere: ecn-sane@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of explicit congestion notification's impact on the Internet List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 16 May 2020 18:17:07 -0000 forwarding this on behalf of tom who is having trouble with his mailer late= ly. ---------- Forwarded message --------- From: Tom Henderson Date: Fri, May 15, 2020 at 11:38 AM Subject: Resending: Re: tcp prague bug in ns3 also? To: Dave and all, I discovered a few minutes ago that my outbound email to Gmail.com addresses has started to experience some delivery issues this morning, so you may not have received the below, which I'm now resending. Dave, I see you just ask ecn-sane; I can try to follow up there as well. - Tom On 5/14/20 11:20 PM, Dave Taht wrote: do you know if tcp prague bug found (no response to loss in the ll queue) recently in the linux version... is in the ns3 version? and where's the current branch? Hi Dave, It should not be susceptible to that; it is a completely different implementation than the Linux Prague. Current version has been dormant for a few months and is here: https://gitlab.com/JoakimMisund/l4s-evaluation/tree/tcp-prague Current status is different from that of Linux. ns-3 version is DCTCP plus the 'paced chirping' startup that Joakim Misund added. ns-3 version does not have RTT independence, 3168 detection/fallback, or pacing alignments with Linux for congestion avoidance phase. We have a GSoC student (Deepak K, cc'ed in this response) who plans to align the ns-3 model with the Linux code, adding the missing features. That project is about to start. We also have another GSoC project that is currently planned to add SCE TCP extensions and SCE-based AQMs, although we are waiting to see what tsvwg decides (if anything) this month. If you or anyone else is interested in tracking these projects, here are the initial wiki pages: https://www.nsnam.org/wiki/GSOC2020Prague https://www.nsnam.org/wiki/GSOC2020AQM and we are setting up public chat threads for each project on this Zulip channel: https://ns-3.zulipchat.com - Tom --=20 "For a successful technology, reality must take precedence over public relations, for Mother Nature cannot be fooled" - Richard Feynman dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-0729