AMD and Intel are updating their processor interrupts, according to Linus Torvalds.
Quietly, both AMD and Intel have decided it’s time to finally clean up some truly ancient and funky CPU design choices, which date all the way back to the early 1980s’ 80286 architecture. They’re going separate ways, and Linus Torvalds, Linux’s founder, recently shared his thoughts on their CPU design choices. AMD was the first to come out with its proposed changes in February 2021: AMD Supervisor Entry Extensions. Intel followed in March with its flexible return and event delivery (FRED) design. What sparked Torvald’s interest was when someone on the Real World Technologies deep technology conversation forum introduced the topic with the note: “x86 – why unite when you can fragment?”
These changes should improve the consistency and performance of interrupts; VisualSim can model these processor details.
Web Reference: https://www.zdnet.com/article/linus-torvalds-on-how-amd-and-intel-are-changing-how-processor-interrupts-are-handled/