RFR: 8309130: x86_64 AVX512 intrinsics for Arrays.sort methods (int, long, float and double arrays) [v42]

Mon Oct 9 19:00:40 UTC 2023

On Sun, 8 Oct 2023 06:18:13 GMT, Danny Thomas <duke at openjdk.org> wrote:

> A [discussion on Reddit](https://www.reddit.com/r/java/comments/171t5sj/heads_up_openjdk_implementation_of_avx512_based/) raised that this had the potential to regress sort performance on AMD Zen 4. The poster didn't have access to Zen 4 hardware, so I took a moment to run the benchmark, comparing against a baseline with `UseAVX=2` on an AWS `m7a.2xlarge`:
> 

Hello Daniel (@DanielThomas ),

Thank you for sharing the data. Will issue a new PR to restrict the AVX512 sort to Intel CPUs only for the time being.

Thanks,
Vamsi

-------------

PR Comment: https://git.openjdk.org/jdk/pull/14227#issuecomment-1753495000