RFR: 8339573: Update CodeCacheSegmentSize and CodeEntryAlignment for ARM [v3]

[Evgeny Astigeevich]

On Mon, 7 Oct 2024 14:10:58 GMT, Boris Ulasevich <bulasevich at openjdk.org> wrote:

> There are reasons against the change for N1/N2
> 
>     * Vladimir saw a regression when testing -XX:CodeEntryAlignment=16 on Ampere (Neoverse N1)

The regression is for 16 not 32. Maybe 32 won't cause regressions. 

> 
>     * with native codes experiment I found that code entry 64B is preferable on G2 (Neoverse N1)

Could you share more data?

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PR Review Comment: https://git.openjdk.org/jdk/pull/20864#discussion_r1792067353