[jdk21u-dev] RFR: 8180450: secondary_super_cache does not scale well

[Andrew Haley]

On Mon, 10 Feb 2025 12:23:43 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>> See [8180450](https://github.com/openjdk/jdk/pull/18309) for a full description of how this works.
>> This is a pretty clean backport, but a few files had to be fiddled manually because things had been added nearby.
>> 
>> This PR also includes a fix for [[8337958](https://bugs.openjdk.org/browse/JDK-8337958)](https://bugs.openjdk.org/browse/JDK-8337958), which was a minor bug in the original commit.
>> 
>> For a justification of why this PR should be backported to JDK 21u, see 
>> [Franz's email](https://mail.openjdk.org/pipermail/jdk-updates-dev/2024-October/038649.html).
>
> test/micro/org/openjdk/bench/vm/lang/SecondarySupersLookup.java line 1:
> 
>> 1: /*
> 
> Could you comment on why only this one test is being back-ported?

The other tests don't really apply to this PR, but to later PRs. They were checked in at the time due to some confusion as to their applicability.

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PR Review Comment: https://git.openjdk.org/jdk21u-dev/pull/1090#discussion_r1950447219