RFR: 8373118: Test java/lang/Thread/virtual/Starvation.java timed out [v27]

[Viktor Klang]

On Sun, 18 Jan 2026 21:07:48 GMT, Doug Lea <dl at openjdk.org> wrote:

>> Changes signal filtering to avoid possible starvation
>
> Doug Lea has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Simplify scan mode control by moving and reworking topLevelExec and throwing on trim

src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 2059:

> 2057:             if (idle != 0 && (runState & STOP) == 0L) {
> 2058:                 int noise = (phase ^ (phase >>> 16)) & (SPIN_WAITS - 1);
> 2059:                 int spins = (SPIN_WAITS << 1) | noise;

@DougLea Haha, it's a funny coincidence, because just last night I was thinking we should try a randomized backoff, and now I saw this. :)

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PR Review Comment: https://git.openjdk.org/jdk/pull/28797#discussion_r2702938962