3 ms·
> For SIMD workload performance increase of AVX512 over AVX2 is 2x It's less than 2x, because the core downclocking for AVX-512 on older CPUs is higher than fo
by adwn 5y ago
> For SIMD workload performance increase of AVX512 over AVX2 is 2x
It's less than 2x, because the core downclocking for AVX-512 on older CPUs is higher than for AVX2: 60% vs 85% on Skylake, so only a ~1.4x speedup. Newer CPU architectures do not downclock, though.
- zigzag312 5y agoTo be fair, multicore workload also causes CPU to operate at lower frequency than at single core workload. In the end, multi-threading and SIMD are both types of parallel processing and each has pros and cons.
- account42 5y ago> Newer CPU architectures do not downclock, though. Newer CPU architectures may not have enforced downclocks, but they will eventually respond to the higher thermal output.