For the better part of two years we've seen Intel open-source software engineers working on preparing the Linux kernel for FRED, the Flexible Return and Event Delivery for defining new transitions for changing privilege levels. Intel's been working hard on the FRED kernel plumbing for better performance, lower response times, and improved robustness and it's looking like FRED could be set to land come Linux 6.9...
While we are beginning to see AMD Zen 4C cores in client systems, these smaller cores have already proven themselves very interesting and capable with the AMD EPYC Bergamo high core count server processors and the extremely power efficient EPYC 8004 "Siena" processors. For showing how far Zen has come in power efficiency, I thought it would be fun to show how the original flagship EPYC 7601 "Zen 1" processor with 32-cores / 64-threads compared to Zen 4C with the EPYC 8324P(N) 32-core processors. But as that isn't even the top-end Siena part, I also tossed in the 64-core EPYC 8534PN too for a top of stack look for the current EPYC 8004 line-up.