New specifications bring Ampere Computing's Cloud Native processors to the world of open computing.
Ampere’s calls its CPUs “Cloud Native processors,” which the company believes are better suited to today’s data center needs. Specifically, Ampere CPUs are single-threaded devices. The company’s designs emphasize large numbers of single-threaded cores with large on-chip caches for each core. These simpler processors draw less power. The alternative, symmetric multithreading appeared on mainframes in the 1960s, when computers had only one CPU.
With the advent of multi- and many-core CPU designs, Ampere believes that SMT has run its course. The company cites two major reasons for this position: Depending on how it’s written, one thread running in a multi-threaded processor can hog all of the processor’s resources, causing the other thread to starve intermittently.
Having multiple threads run on one processor core with shared resources including execution pipelines and caches is inherently less secure than isolating each software thread to its own processor. Finally, Ampere has joined the OCP Foundation’s modular DC-MHS development effort along with multiple other vendors including AMD, Dell, Intel, Google, HP, Meta, and Microsoft. The foundation’s DC-MHS effort is designed to allow easy component reuse in servers, encourage a circular supply chain, and help system vendors bring new and improved server designs to market faster. The industry is already adopting DC-MHS for the design of edge, enterprise, and cloud servers.
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