From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com [IPv6:2a00:1450:4864:20::631]) (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 63DB83CB52 for ; Tue, 6 Jul 2021 18:40:26 -0400 (EDT) Received: by mail-ej1-x631.google.com with SMTP id gn32so137825ejc.2 for ; Tue, 06 Jul 2021 15:40:26 -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 :cc; bh=ahsXLmpXxlKWPFAQOhFC39ooh/npK4o4Nj3fwJl58xs=; b=jY85gwc2sBmoDFCeQxH9dHrpVp0sV0+MXg3MZqbeMXh41wdREkfmy/cELPsgdoHLsX bqsJpYC7ZDDM4OchIDAc5rmKNNfm5UAaeqOO5a9L9TJ06EOCkazBn2FM29urUdU3IwlG EyV14sE5EjNXMSn11RFfFGXpelv9Zoe/p+KA8/+Y5AOxz1dSmS0l+Y5uX6ATS6npxwVG BwIWN6BjRRw0I4GYiZ56tDJlMrPailZEEGUto3asZVgKpDPAR8QgTy5/wq0dAoy7ruQl Wq5LzJVyLI58Ja6bt4GOn5f8Y/QH7Namr3P4cFY/VqzqMSteg9DsWZhQfkvN/zRmwIQk ZMcg== 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:cc; bh=ahsXLmpXxlKWPFAQOhFC39ooh/npK4o4Nj3fwJl58xs=; b=PDVmDbhd+O84racJeJ8TpPVM3vluCmoBGHr2+5WhKjaPu5aUCDgQdqfG1vRuvQZv/z o4uDKcbA6YbQ9+R9i9gPmZ96K0LUNHnStiK5gc969ynUOwWZbfkCqS3E/v5wHwzzb2+7 ZajJZ4lAnWneUJW2Bdk6ExipZQKtiJEKmfItZIGQg0Bxh7F2qpPOyN5JrLp3HKV44I72 ejMR3M+U4qHEH5LOsXQwOpVgQCgCxoG5mzyjiAU8AF74viLvSLFt3UFM6QbRLiCRMxDO CfpKJknWFe/5Rf67hMBpdt3CKeiUeHK+s7ugnIgGJHL2uzIzbmp8Et5bZGCX87Xa+xfT hCEA== X-Gm-Message-State: AOAM533ED6qvTjhVu+uf0toEbq4uCs7NCf8MikMem5NraQ0lgYPn6qNb vi4WbmLzLrJO0Z/7t6QZDPA719kV3W8qEzKZkJk= X-Google-Smtp-Source: ABdhPJxT2T/MbIFiGDecJ60dWoNSuSJO4K0a5zKvvMx4Hn+sTVZEEPfLXTTTfFTRqXcliLwtaB7YSSj+z1SAXlRUPYw= X-Received: by 2002:a17:907:9687:: with SMTP id hd7mr20514424ejc.339.1625611225379; Tue, 06 Jul 2021 15:40:25 -0700 (PDT) MIME-Version: 1.0 References: <20210621210048.628befdb@hermes.local> <38CC4C4D-AE42-4629-8472-16BCC0DEAFEA@gmx.de> <383273DA-3700-469D-9FE2-524C9D21C4DA@cable.comcast.com> In-Reply-To: From: Aaron Wood Date: Tue, 6 Jul 2021 15:40:14 -0700 Message-ID: To: "Wheelock, Ian" Cc: "Livingood, Jason" , "bloat@lists.bufferbloat.net" Content-Type: multipart/alternative; boundary="000000000000a1b86405c67c1b1c" Subject: Re: [Bloat] Really getting 1G out of ISP? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Jul 2021 22:40:26 -0000 --000000000000a1b86405c67c1b1c Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I'm sure it's present, as a capability. I just think it's not being used (based on what I see for upstream bloat, which is >100ms without running cake in the router). On Tue, Jul 6, 2021 at 3:28 PM Wheelock, Ian wrote: > The support for AQM (PIE) is mandatory in D3.1 modems regardless of the U= S > mode in use (ie sc-qam (3.0) or ofdma (3.1) upstream), so it should be > enabled. > > Get Outlook for Android > > ------------------------------ > *From:* Bloat on behalf of Aaron > Wood > *Sent:* Tuesday, July 6, 2021 11:13:59 PM > *To:* Livingood, Jason > *Cc:* bloat@lists.bufferbloat.net > *Subject:* Re: [Bloat] Really getting 1G out of ISP? > > Are these in-flux changes to where the upstream split is why some modems > report DOCSIS 3.1 downstream, but only 3.0 upstream? (and therefore aren= 't > enabling AQM on the upstream?) > > -Aaron > > On Tue, Jun 22, 2021 at 4:04 PM Livingood, Jason via Bloat < > bloat@lists.bufferbloat.net> wrote: > > > For DOCSIS the issue seems to be an unfortunate frequency split between > up and downstream and use of lower efficiency coding schemes. > > Performance really takes a big step forward once a person has a D3.1 mode= m > in their home, bringing OFDM and OFDMA as key advancements. Also in flux = at > the moment is where the upstream split is in cable networks, which are > moving to mid-split or high-split designs that bring more upstream > bandwidth. As well, over the past 18+ months, most cable networks have > added substantially more upstream channels as well as performed quite a > number of fiber node splits. And that is just below the physical layer > stuff - there's also a lot of work at the software layer for modems and > CMTSes that is quite interesting. > > JL > > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat > > > --000000000000a1b86405c67c1b1c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I'm sure it's present, as a capability.=C2=A0 I ju= st think it's not being used (based on what I see for upstream bloat, w= hich is >100ms without running cake in the router).

On Tue, Jul 6, 2021 = at 3:28 PM Wheelock, Ian <= ian.wheelock@commscope.com> wrote:
The support for AQM (PIE) is mandatory in D3.1 modems regardless of the US = mode in use (ie sc-qam (3.0) or ofdma (3.1) upstream), so it should be enabl= ed.


Fro= m: Bloat <bloat-bounces@lists.bufferbloat.net> on behalf of Aar= on Wood <woody77@= gmail.com>
Sent: Tuesday, July 6, 2021 11:13:59 PM
To: Livingood, Jason <Jason_Livingood@comcast.com>
Cc: bloat@lists.bufferbloat.net <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] Really getting 1G out of ISP?
=C2=A0
Are these in-flux changes=C2=A0to where the upstream split= is why some modems report DOCSIS 3.1 downstream, but only 3.0 upstream? = =C2=A0(and therefore aren't enabling AQM on the upstream?)

-Aaron

On Tue, Jun 22, 2021 at 4:04 PM Livingood, Jason via Bloat= <bloat= @lists.bufferbloat.net> wrote:
> For DOCSIS the issue seems to be an unfortunate frequency split betwee= n up and downstream and use of lower efficiency coding schemes.

Performance really takes a big step forward once a person has a D3.1 modem = in their home, bringing OFDM and OFDMA as key advancements. Also in flux at= the moment is where the upstream split is in cable networks, which are mov= ing to mid-split or high-split designs that bring more upstream bandwidth. As well, over the past 18+ months, mos= t cable networks have added substantially more upstream channels as well as= performed quite a number of fiber node splits. And that is just below the = physical layer stuff - there's also a lot of work at the software layer for modems and CMTSes that is quite in= teresting.

JL

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