From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) (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 ADA333B29E for ; Wed, 23 Jun 2021 11:56:21 -0400 (EDT) Received: by mail-pf1-x432.google.com with SMTP id g192so2651481pfb.6 for ; Wed, 23 Jun 2021 08:56:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=UIyiHndfTNVJ0RMcfxfMXrNt90kOqB1nnhwBSTrEEak=; b=x5Jm1BucRG2O7rFvczJgYifUdOGSqSZFA6A1ulYXq1Rb6WPh7mOXTtlwvuQzQVfdB/ DFssIdzcL3E445qCNr3S4HbTQU0v1cnixOI3hQFndCNoxI70LoeclMqtOFyFUsYKWxL+ ET2VPfRteMtQNVsty1hpyfQo08smh6WOtGgBK/AqzLuiTVEKrSU2s5xm/SEZGl9UIq4l aLMF2Sk5NDQpGkCHqJKnXfuCaFfrjzKwrGdiioGkiRVHlmLoC3Epmo19IckER1f9ZZBy rB51yM+SiAjRwpMAOorrJ+f/6G5uU29OwN9Nk/eev0eOs56wuRBhz/+LHl8Q2yKKi7n7 n4pA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=UIyiHndfTNVJ0RMcfxfMXrNt90kOqB1nnhwBSTrEEak=; b=XSgbVUouF1ksjXrVyYyfo1Y8YHNtyq/5V3PsdybiSopSDw5UHhNc6gHHT8CHznzU8p m0Z22a+iCzbpZGxznZRZMkmRcFmQ4gACK7pkPaSulAWY1AqTewfZGAfyF8s8sc90i3kS /TonuS3mAZEbH5PFsVCM3sBTKn4tFxCBLggsLUkyxjjT8gQoYqveDBNcE3mcnEN82RL4 xIvtRL7I7pbLQDfp83BafuIx9t4eVpd0Bz3eM43ZhcRsm9xjBdXLM6cfdgWtHndyAMJ4 I24kPvc6qL1mH78Wnfw727O8qfz2rSnQxqni6W1zrmMs3FvymCa0DAkJTyAMvcnZHtC3 coow== X-Gm-Message-State: AOAM533n6uFRXiJVCfmaJ50pQkJIMcsaRqh69UWGO7tK0F8P7z0XQx0B aUss559i7VUpGJCAE2Kd7dpdqQ== X-Google-Smtp-Source: ABdhPJxxoWMgp6Os/CV6XXvzTLAls6idPdY2/8gF//vg9n3E75BzcU77PROLPQwDJBapRQw0p/HqoA== X-Received: by 2002:a63:5414:: with SMTP id i20mr163557pgb.5.1624463780706; Wed, 23 Jun 2021 08:56:20 -0700 (PDT) Received: from hermes.local (76-14-218-44.or.wavecable.com. [76.14.218.44]) by smtp.gmail.com with ESMTPSA id s7sm127420pjr.11.2021.06.23.08.56.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Jun 2021 08:56:20 -0700 (PDT) Date: Wed, 23 Jun 2021 08:56:12 -0700 From: Stephen Hemminger To: "Livingood, Jason" Cc: Sebastian Moeller , "bloat@lists.bufferbloat.net" Message-ID: <20210623085612.46659e22@hermes.local> In-Reply-To: <383273DA-3700-469D-9FE2-524C9D21C4DA@cable.comcast.com> References: <20210621210048.628befdb@hermes.local> <38CC4C4D-AE42-4629-8472-16BCC0DEAFEA@gmx.de> <383273DA-3700-469D-9FE2-524C9D21C4DA@cable.comcast.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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: Wed, 23 Jun 2021 15:56:21 -0000 On Tue, 22 Jun 2021 23:04:18 +0000 "Livingood, Jason" 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 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 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 > Also discovered that the cable modem I am using is one of the ones with the broken Intel Puma chipset (even a lawsuit about that). Will be changing it today.