Surprise, surprise! Hardlocked scaling limits would have been so obvious even 20 years ago. The only non-linear scaling I noticed was on the hardware side of things. And benchmarks tell me exactly that.
The problem we are having are the applications that don’t scale…I even remember a video from Wendell having to start multiple instances to hit the amount of threads provided by CPU and Linux.
AMD and Intel invest a whole lot into kernel development…they don’t want bad numbers or bottlenecks for their new flagships.
P.S.: Nice 56-core machine. 8x64GB RDIMMs? 