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Inside M4 chips: P cores
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.
Apple is expected to release an Ultra variant in 2025, consisting of two M4 Max chips connected and working in tandem, providing a total of 24 P and 8 E cores. The following charts show 4 threads of intensive in-core floating point arithmetic running on the P cores of an M4 Pro. Posted in Macs, Technology and tagged Activity Monitor, Apple silicon, ARM, M4, performance, power.
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