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This is the case in Intel 12th gen: P cores support AVX512, E cores do not. Instead of allowing OS-level support, you could gain back AVX512 by disabling E core
by lights0123 3y ago
This is the case in Intel 12th gen: P cores support AVX512, E cores do not. Instead of allowing OS-level support, you could gain back AVX512 by disabling E cores. Intel ended up disabling that feature in hardware later though.
- MobiusHorizons 3y agoThis was honestly a pretty surprising mistake for a big player like Intel. Quite a big oversight in my opinion. The fact that the OS will migrate processes from big cores to little cores should not be a surprise, given that it is basically necessary for the power savings to be realized. That effectively necessitates having the same ISA on both the big and little cores. It's not like desktop class operating systems haven't been running on these types of cores for over a decade.