On Thu, 7 Aug 2025 14:03:40 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 incrementally with one additional
> commit since the last revision:
>
> Avoid underutilization on resize
src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 2003:
> 2001: continue rescan;
> 2002: if (b == (b = q.base) && a[bk] == null)
> {
> 2003: if (a[nk] == null && a[(b + 2) & m]
> == null) {
@DougLea Seems worth it to add a comment around why we're looking at b + 2 here.
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PR Review Comment: https://git.openjdk.org/jdk/pull/26479#discussion_r2272712916
