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A comment on Zen4's AVX512 Teardown. Parent comment

Re:Zen4's AVX512 Teardown by ComputerGuru on Monday October 03, 2022 @08:34PM (#33075419)
Because it's hard to say "conditionally enable AVX-512 only on platforms supporting it BUT not on platforms where it actually brings performance penalties."
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Re:Zen4's AVX512 Teardown by janwas on Tuesday October 04, 2022 @12:50AM (#33076794)
Can you give a real example of AVX-512 actually causing a net performance penalty on any CPU?

The only way I can see that happening is using AVX-512 in small, infrequently called functions such as strcmp, and the solution is: don't do that.

If proper SIMD code runs for say 1ms at a time, it's pretty much guaranteed to benefit from any implementation of AVX-512.

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