How macOS controls CPU P core cluster frequency according to the cluster total active residency, in synthetic in-core tests, compression and when running virtual machines.
M3
In-core performance compared across P and E cores in M1, M3 and M4 chips shows substantial performance improvements, particularly in vector and matrix computation.
Explains the three different settings, including Permissive Security, why you might need to reduce security, and how to do so using Startup Security Utility.
If you don’t know your M2 from an M3, here’s a short summary of the timeline of their release, and their major differences, before we all get our heads around the coming M4 Macs.
Secure Boot and its 5 stages, the SSV, support for external bootable disks, the SEP, Recovery, and lightweight virtualisation.
Memory, from L1 instruction cache to main memory, and how it came to be Unified. Why the internal SSD isn’t like others, and why it’s so essential.
How the NEON vector processor, neural engine, matrix co-processor, and GPU all deliver high performance with low power and energy use.
What do you do when your Mac refuses to log you in because it thinks your password is incorrect? Don’t rush or panic, but follow these steps.
Running threads at different frequencies on the same core type can’t save energy and extend battery endurance. That’s where 2 core types come in handy.
How power efficiency is just as important to desktop Macs as it is to notebooks, and the story of the Mac mini in power from 2005-2023.
The Eclectic Light Company 