On Wed, 29 May 2024 11:33:40 GMT, Doug Lea <d...@openjdk.org> 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/01d11057...cf5fe55c
src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 1969: > 1967: else if ((e & SHUTDOWN) == 0) > 1968: return 0; > 1969: else if (compareAndSetCtl(c, c) && casRunState(e, e | > STOP)) is the `compareAndSetCtl(c, c)` needed for the read+write fence if ctl == c? ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/19131#discussion_r1618963723
