Yes, there is one per core cluster. The title is a bit misleading, because it suggests that going to two or three cores will scale linearly, though it won't be

Yes, there is one per core cluster. The title is a bit misleading, because it suggests that going to two or three cores will scale linearly, though it won't be much faster. See here for sgemm benchmarks for everything from the M1 to M1 Ultra and 1 to 16 threads: https://github.com/danieldk/gemm-benchmark#1-to-16-threads https://github.com/danieldk/gemm-benchmark#1-to-16-threads