For those having issues with their new AMD Ryzen CPU’s SMT functionality in Linux, the latest kernel version 4.10.3 rectifies the issue which was present in kernel version 4.9 and below.
Older versions of the Linux kernel bundles both the threadID and the APIC ID together when SMT is enabled. This causes the OS to assign a unique CPU Core ID to each thread instead of the same CPU ID to a pair of threads.
The Linux kernel development page describes the error as the following:
our SMT scheduling topology for Fam17h systems is broken, because the ThreadId is included in the ApicId when SMT is enabled. So, without further decoding cpu_core_id is unique [...]
Not even a month has passed since AMD launched their Zen based Ryzen desktop CPUs and AMD is already preparing their assault against Intel’s Xeon server dominance with their upcoming Zen based Naples CPUs.
The new server CPUs, which AMD refers to as SoCs will feature 32-cores/64-threads, eight memory channels, up to 2TB of DDR4 memory, and 64 PCIe 3.0 lanes. This is spec for spec far more powerful than its chief competition, the Intel Xeon E5-2599A v4 processor which features a paltry 22 cores, four memory channels, up to 1.54TB of DDR4, and 40 PCIe 3.0 lanes. AMD claims that the Naples SoC is able to offer 60% better performance and 122% more memory [...]
At the International Solid State Circuits Conference (ISSCC), AMD recently presented some additional in-depth information about the upcoming Zen micro-architecture used in their highly anticipated Ryzen CPUs.
The AMD Zen micro-architecture is a complete redesign from the ground up and is the first AMD processor to utilize GlobalFoundries 14 FinFET process. It’s a 4 core design which is bumped up to 8 threads with AMD’s new SMT technology which allows a single core to process up to two threads simultaneously. It’ll also feature 32KB L1 cache per core, 512KB L2 cache per core and 8MB shared L3 cache. Interestingly enough, [...]
More rumors flowing out of the rumor-mill today as pricing as well as specifications for the full AMD Ryzen lineup have been leaked. This leak itself isn’t verified, but it’s purported to come from an internal product listing of a Chinese retailer for the entire AMD Ryzen product line.
Before we dive in, we’ll be using the prices converted directly from Chinese Yuan (CNY) to USD. If historical trends are to continue, expect actual street prices to be lower due to the Chinese market being roughly 20% more expensive than the US market due to import taxes. For example the Intel Core i7 7700K is priced at 2799 CNY which comes to $406 USD, which is far [...]
Fresh news out of the ISCCC (International Solid-State Circuits Conference) as AMD has recently shared some new specifications on their Zen architecture powering the highly anticipated Ryzen processors expected to ship in the coming weeks.
In an article published by EEtimes, AMD released a paper which shows that their 14nm Zen cores utilize 10% less die area (44mm² vs 49mm²) and has double the L2 cache compared to Intel’s current generation 14nm Skylake cores. Both analysts and Intel engineers believe Zen cores are competitive however, a determination on whether the small die sizes will translate into lower manufacturing costs is still unknown at this [...]
Some keen observers recently discovered an interesting piece of information about AMD’s upcoming Ryzen CPUs on GDC (Game Developer Conference) presentation schedule. According to the schedule, AMD will be delivering a talk on “Optimizing for AMD Ryzen CPU” and in the description, it says “Join AMD Game Engineering team members for an introduction to the recently-launched AMD Ryzen CPU…”
AMD has been confident on the Q1 release date for Ryzen and this piece of news just serves as another confirmation. GDC is scheduled for February 27th to March 3rd at the Moscone Center in San Francisco.
AMD has since revised the GDC [...]
Remember a couple days ago when Canard PC leaked the first AMD Ryzen review? Well, it appears that not all the information was presented in French. Some keen eyed Reddit users recently discovered that Canard PC also embedded a hidden message written in binary code for readers to find. The code is as follows:
Using a binary to ASCII converter, the code can be translated into “[email protected]=5G“.
While no accompanying information such as voltage required, what type of air cooler was used, what type of thermal paste was used, how stable the overclock is, [...]
Several weeks ago, AMD made waves with their announcement and subsequent demonstration of Ryzen, the official name of AMD’s highly anticipated Zen architecture based processor. During the demonstration, Ryzen was shown to either match or beat the Core i7-6900K which is a high end $1,100 processor from AMD’s primary competitor, Intel. However, at the time only a few benchmarks were demonstrated and given that it’s AMD doing the demonstrating, there was a good chance the benchmarks were cherrypicked in favor of AMD’s upcoming chip.
While AMD isn’t expected to release Ryzen until early next year, French based print magazine, [...]
AMD has finally lifted the wraps on its upcoming Zen architecture based CPU which will formally be named Ryzen. Ryzen, codename Summit Ridge, will be built on the 14nm FinFET process, feature up to 8 cores (16 threads using SMT technology), have a base frequency of 3.4GHz+, 20MB of L2+L3 cache, and a TDP of 95W.
Alongside Ryzen is the new AMD AM4 platform. AMD touts that AM4 will give users a versatile upgrade path, utilizing a single socket for everything from the mid-range to enthusiast. One of the most interesting features of AM4 is its split I/O operation. Certain I/O features are baked into the socket which help to reduce the access to the chipset for [...]
Most companies wait until CES to make their biggest announcements, but with the massive scale of CES these days, it’s easy for your message to get lost in the noise. As such, it appears that AMD may be holding one of their most important product launches in over a decade this month on December 15.
According to the event page, the event is titled “New Horizon” and AMD will be offering a “sneak preview” of their new “Zen” CPU. AMD will be strongly pushing their upcoming platform to gamers as they’ve invited video game journalist Geoff Keighley to present the show along with professional eSports gamer PPD to put [...]