Sys.CPU_THREADS doesn't appear to get all my threads on Mac

Specific Domains Julia at Scale
4

So the M2 ultra has 16 big cores and 8 small cores. Julia is only telling you about the big cores because generally putting work on the little cores slows things down a bunch. See also jl_cpu_threads: exclude big.LITTLE efficency cores by staticfloat · Pull Request #42099 · JuliaLang/julia · GitHub

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