RFR: 8319447: Improve performance of delayed task handling [v12]

[Doug Lea]

On Tue, 25 Mar 2025 15:40:08 GMT, Viktor Klang <vklang at openjdk.org> wrote:

>> 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 47 additional commits since the last revision:
>> 
>>  - Merge branch 'openjdk:master' into JDK-8319447
>>  - Match indent of naster changes
>>  - Use TC_MASK in accord with https://bugs.openjdk.org/browse/JDK-8330017 (Unnecessarily for now.)
>>  - Reword javadoc
>>  - Use SharedSecrets for ThreadLocalRandomProbe; other tweaks
>>  - Disambiguate caller-runs vs Interruptible
>>  - Merge branch 'openjdk:master' into JDK-8319447
>>  - Associate probes with carriers if Virtual (no doc updates yet)
>>  - Reduce volatile reads
>>  - Address review comments; reactivation tweak
>>  - ... and 37 more: https://git.openjdk.org/jdk/compare/70380108...b552c225
>
> test/jdk/java/util/concurrent/CompletableFuture/CompletableFutureOrTimeoutExceptionallyTest.java line 51:
> 
>> 49:         var future = new CompletableFuture<>().orTimeout(12, TimeUnit.HOURS);
>> 50:         future.completeExceptionally(new RuntimeException("This is fine"));
>> 51:         while (delayer.getDelayedTaskCount() != 0) {
> 
> Should this not check `> 0`?  🤔

Thanks, done.

> test/jdk/java/util/concurrent/CompletableFuture/CompletableFutureOrTimeoutExceptionallyTest.java line 65:
> 
>> 63:         var future = new CompletableFuture<>().completeOnTimeout(null, 12, TimeUnit.HOURS);
>> 64:         future.completeExceptionally(new RuntimeException("This is fine"));
>> 65:         while (delayer.getDelayedTaskCount() != 0) {
> 
> Should this not check > 0? 🤔

Done.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/23702#discussion_r2012750415
PR Review Comment: https://git.openjdk.org/jdk/pull/23702#discussion_r2012750966