RFR: 8305895: Implement JEP 450: Compact Object Headers (Experimental) [v21]

[Thomas Stuefe]

On Thu, 24 Oct 2024 09:12:34 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> But then, what exactly is the error? If it's just the test assuming that cache line size is log 6, then the test should be fixed for ppc, not hotspot.

that is the problem, test assumes log2 of 6 for chacheline size

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PR Review Comment: https://git.openjdk.org/jdk/pull/20677#discussion_r1814617136