Monday, March 8, 2021 [Tweets] [Favorites]

Apple M1 Microarchitecture Research

Dougall Johnson (via Hacker News):

This is an early attempt at microarchitecture documentation for the CPU in the Apple M1, inspired by and building on the amazing work of Andreas Abel, Andrei Frumusanu, @Veedrac, Travis Downs, Henry Wong and Agner Fog. This documentation is my best effort, but it is based on black-box reverse engineering, and there are definitely mistakes.

[…]

These numbers mostly come from the M1 buffer size measuring tool. The M1 seems to use something along the lines of a validation buffer, rather than a conventional reorder buffer, which complicates measurements a bit. So these may or may not be accurate.

Previously:

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