On Mon, 24 Nov 2025 15:09:40 GMT, Doug Lea <[email protected]> wrote:
>> This set of updates reduces contention-based performance loss under heavy
>> over-subscription, while also improving perfomance more generally.
>
> Doug Lea has updated the pull request with a new target base due to a merge
> or a rebase. The incremental webrev excludes the unrelated changes brought in
> by the merge/rebase. The pull request contains 29 additional commits since
> the last revision:
>
> - Merge branch 'openjdk:master' into JDK-8360046
> - Signal on setParallelism
> - Drop added Contended region; simplify accordingly
> - Tweaks
> - Merge branch 'openjdk:master' into JDK-8360046
> - Seperate repolling policies
> - Faster quiescent termination
> - Fix push, refactor deactivate
> - Use absolute timed waits
> - Reduce deactivate/reactivate and cancelled timeout rates
> - ... and 19 more: https://git.openjdk.org/jdk/compare/34194ee8...383f9238
src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 3339:
> 3337: throw new UnsupportedOperationException("Cannot override
> System property");
> 3338: if ((prevSize = getAndSetParallelism(size)) < size)
> 3339: signalWork(null, 0);
Suggestion:
signalWork(null, 0); // trigger worker activation
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/26479#discussion_r2556901461
