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They didn’t actually test AVX-512 on and off: > Unfortunately, @RPCS3 does not demonstrate emulation performance on the 12900K with the E cores enabled and AVX
by PragmaticPulp 5y ago
They didn’t actually test AVX-512 on and off:
> Unfortunately, @RPCS3 does not demonstrate emulation performance on the 12900K with the E cores enabled and AVX-512 disabled. This would be very interesting to know since it is the default Alder Lake configuration. It would also be interesting to see how much of a difference AVX-512 really makes to this PS3 emulator.
So we don’t know how much the AVX-512 instructions actually deliver gains, and they didn’t bother trying to find out. Feels like tech websites are just putting AVX-512 in headlines now because they know the controversy is good for easy clicks.
You have to specifically disable the efficiency cores to enable AVX-512, so the change would have a negative impact on a lot of multi-threaded workloads that aren’t AVX-512. It also worsens thermal performance and power efficiency because you’re disabling the efficient cores.