RFR: 8339573: Update CodeCacheSegmentSize and CodeEntryAlignment for ARM

[Boris Ulasevich]

On Tue, 10 Sep 2024 19:33:07 GMT, Peter B. Kessler <pbk at openjdk.org> wrote:

> Were performance runs made with CodeEntryAlignment set to other than 64 or 16? It seems like the other choices (32, 128, are there others that make sense?) should be tried.

Here are rough neoverse-v2 numbers:
JmhDotty (-XX:CodeEntryAlignment=16) 701.93 ± 5.00 ms/op
JmhDotty (-XX:CodeEntryAlignment=32) 703.56 ± 5.15 ms/op
JmhDotty (-XX:CodeEntryAlignment=64) 704.46 ± 5.18 ms/op
JmhDotty (-XX:CodeEntryAlignment=128) 703.71 ± 5.17 ms/op

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PR Comment: https://git.openjdk.org/jdk/pull/20864#issuecomment-2343886412