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

[Severin Gehwolf]

On Thu, 6 Feb 2025 18:41:57 GMT, Andrew Haley <aph 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).
>
> For avoidance of doubt:
> 
> A later bug, https://bugs.openjdk.org/browse/JDK-8344355, does not apply to this PR. The bug 8344355 fixed was caused by 8331341: secondary_super_cache does not scale well: C1 and interpreter. 8331341 is not included here, and I have no intention of ever backporting it.

@theRealAph This is ready to integrate. Please do so.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/1090#issuecomment-2700746374