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

[Andrew Haley]

On Thu, 23 May 2024 14:11:36 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> PPC64 implementation of [JDK-8180450](https://bugs.openjdk.org/browse/JDK-8180450). Please review! I noticed that `r_array_length` is sometimes 0 and I don't see code for that on x86. Any idea? How can we verify it? By comparing the performance using the micro benchmarks?

Run all of tier1 with `-XX:+VerifySecondarySupers`

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PR Comment: https://git.openjdk.org/jdk/pull/19368#issuecomment-2133847120