RFR: JDK-8319662 ForkJoinPool trims worker threads too slowly [v8]

[Viktor Klang]

On Sat, 13 Jan 2024 19:46:05 GMT, He-Pin(kerr) <duke at openjdk.org> wrote:

>> Cool, I just encounter this problem, when I migrate to Virtual threads and set  `jdk.virtualThreadScheduler.maxPoolSize` to 2500.
>> 
>> Will this change backport to j21u, thanks.
>
>> @He-Pin I tried to backport this patch for you just now [1]. But it can't be automatically backported because JDK-8288899 [2][3] also revised the file `src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java`. Do you want to backport these two patches? Or only this one?
>> 
>> [1] https://github.com/openjdk/jdk/commit/cc25d8b12bbab9dde9ade7762927dcb8d27e23c5#commitcomment-136982984
>> [2] https://bugs.openjdk.org/browse/JDK-8288899
>> [3] https://git.openjdk.org/jdk/pull/14301
> 
> I think the related issue should be backported too.

@He-Pin Hi He-Pin, I think @AlanBateman is right, first check if most recent 22-EA build addresses the issue you are seeing.

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PR Comment: https://git.openjdk.org/jdk/pull/16725#issuecomment-1891996543