How Linux Kernel 4.21 optimizes AMD 7nm Zen2 architecture

Today, I will talk to you about how Linux Kernel 4.21 optimizes the AMD 7nm Zen2 architecture, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.

The guided AMD 7nm Zen2 processor is expected to be launched in the first quarter of next year, using the next generation of 7nm EPYC. Linux Kernel 4.21 has been updated to optimize the AMD 7nm EPYC Rome (Rome) processor.

The AMD 7nm EPYC Rome (Rome) processor has made some bold innovations in design. For example, the CPU core and the Iamp O chip are separate. "the 14nm 7nm CPU O chip is the key to the design. The core chip connects eight small 7nm CPU chips together to create a massively scalable architecture."

However, after the kernel adjustment, a new QOS domain is added that enforces L3 cache limits, priority, and memory bandwidth enforcement. This will contribute to the new architecture of the broader software ecosystem and may avoid some of the potential of the new design.

In addition, this adjustment makes better use of AMD Zen2's new compiler "znver2", which supports things such as writeback and non-invalid caching (WBNOINVD), read processor ID (RDPID), and cached line writeback (CLWB), and so on.

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