On Wed, 29 May 2024 11:33:40 GMT, Doug Lea <[email protected]> wrote:
>> This set of changes address causes of poor utilization with small numbers of
>> cores due to overly aggressive contention avoidance. A number of further
>> adjustments were needed to still avoid most contention effects in
>> deployments with large numbers of cores
>
> 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 41 additional commits since
> the last revision:
>
> - Merge branch 'openjdk:master' into JDK-8322732
> - Add test for utilization with interdependent tasks
> - Un-misplace onSpinWait call
> - Adjust control flow
> - Reduce memory stalls
> - Merge branch 'openjdk:master' into JDK-8322732
> - More performance tradoffs
> - Address review comments
> - Merge branch 'openjdk:master' into JDK-8322732
> - Repack some fields; adjust control flow
> - ... and 31 more: https://git.openjdk.org/jdk/compare/2d55c424...cf5fe55c
src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 1452:
> 1450: * Runs the given task, as well as remaining local tasks.
> 1451: */
> 1452: final void topLevelExec(ForkJoinTask<?> task, int cfg) {
Looks real clean, nice work @DougLea
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PR Review Comment: https://git.openjdk.org/jdk/pull/19131#discussion_r1618948755
