A matrix multiplication test appears to be run on the AMX matrix co-processor, and behaves differently from in-core tests. And what Power modes really do.
M4
Power use in two in-core performance tests, by number of threads run, leading to estimates of total energy used by P and E cores running the same code, at high frequencies. How efficient are the CPU cores in the M4?
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.
Less glamorous than the P cores, E cores are used to run background threads. Details of their architecture, how threads are managed on them and their efficiency.
A bug, most probably in the early part of kernel boot in guest macOS, prevents M4 Macs virtualising macOS prior to 13.4.
macOS virtual machines are preferentially run on P cores. Details on their performance, core allocation, frequencies and power use/
Details of their frequency, ISA, power use, and how macOS allocates threads to P cores and relocates them. Supported by data from an M4 Pro.
Set up from unboxing in under 2 hours, its CPU cores perform better than those in the M3, differences that are magnified.
Is an M4 next week a better risk than the promise of a better model next year? Understand how to select the M4 chip suited to your needs, and specify your new Mac.
Comparing CPU core counts and maximum core frequencies across the four families in the M series, plus expected performance of Thunderbolt 5. Which M4 Mac should you buy?
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