RFR: 8331117: [PPC64] secondary_super_cache does not scale well

[Martin Doerr]

On Mon, 27 May 2024 16:53:13 GMT, Andrew Haley <aph at openjdk.org> wrote:

> 12ns is very slow. I don't understand that.

Right, it's surprisingly slow regardless if the patch is applied or not. My x86 machine is about 8x faster. The PPC64 machine isn't optimized for single thread performance. It's configured to use SMT8 (8 threads per core). I guess s390 will achieve better single thread performance.

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PR Comment: https://git.openjdk.org/jdk/pull/19368#issuecomment-2133931855