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[83.245.238.149]) by smtp.gmail.com with ESMTPSA id a16-v6sm1191733ljj.28.2018.07.28.09.11.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 28 Jul 2018 09:11:06 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Jonathan Morton In-Reply-To: Date: Sat, 28 Jul 2018 19:11:05 +0300 Cc: Dan Siemon , Cake List Content-Transfer-Encoding: quoted-printable Message-Id: <33C09185-34D2-4D96-9DE3-345D51D4D5C9@gmail.com> References: <1357421162.31089.1531812291583@webmail.strato.de> <1c323544b3076c0ab31b887d6113f25f572e41ae.camel@coverfire.com> <3ab0c2e8d33a71ca58a404a6a8b293a95fe1e9d3.camel@coverfire.com> To: Dave Taht X-Mailer: Apple Mail (2.3445.9.1) Subject: Re: [Cake] =?utf-8?q?Using_cake_to_shape_1000=E2=80=99s_of_users=2E?= X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Jul 2018 16:11:08 -0000 > On 28 Jul, 2018, at 6:51 pm, Dave Taht wrote: >=20 > That's also pretty low end. On the high end nowadays there's stuff = like this: >=20 > = https://www.amazon.com/Intel-Xeon-E5-2698-Hexadeca-core-Processor/dp/B00PD= D1QES Intel is no longer high-end for x86 CPUs. Not all of the market has = realised that yet, but it's true. Look at Threadripper 2 which scales up to 32 cores, 64 threads in a = single socket at HEDT prices, and EPYC which just goes bonkers in terms = of I/O capabilities and still costs less than its nearest Intel = competitor. None of which has any serious concerns with the recent = series of Meltdown/Spectre speculation bugs, unlike Intel. AMD is moving to a 7nm silicon process which apparently works pretty = well already, and is theoretically on par with Intel's 10nm process = which they still haven't got working reliably after how many years of = delays now? And they're already beating Intel over the head with a 14nm = process which is theoretically *inferior* to Intel's 14nm process, which = they'll be stuck with in practice for *at least* the next year even by = their own wildly optimistic latest estimates. The only place Intel temporarily holds a real advantage is in maximum = single-threaded turbo clock speed. This is relevant to a shrinking = minority of users these days. AMD's next CPUs are supposed to make that = wholly irrelevant with a significant further jump in IPC - because they = were designed to compete with 10nm Intel CPUs that Intel now looks very = unlikely to be capable of manufacturing. And is this relevant to "Super Mega Turbo Cake Edition XLRi"? Well, one = of the nice things about having lots of users is that you can = statistically multiplex them across multiple hardware queues more = easily. Each subscriber's traffic can sanely end up on the same queue = each time, and each queue can have a separate "Super Cake" instance = allocated an even division of the total backhaul bandwidth, and in = theory each of *those* can run on its own CPU core. Instant throughput = boost. - Jonathan Morton