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I wonder if AVX-512 CPU throttling is a big problem for sorting algorithms based on those instructions.
by Conscat 3y ago
I wonder if AVX-512 CPU throttling is a big problem for sorting algorithms based on those instructions.
- janwas 3y agoWe looked into this [1] and conclude: - throttling is a non-issue on Xeon Gold/Platinum; - AVX-512 startup overhead can hurt on Skylake, but AVX-512 is still a net win for data sizes >= 100 KiB. - Startup overhead is a non-issue on Icelake and AMD Zen4. 1: https://github.com/google/highway/blob/master/hwy/contrib/sort/README.md#study-of-avx-512-downclocking https://github.com/google/highway/blob/master/hwy/contrib/so...
- Conscat 3y agoWow, that's an awesome writeup!