On Fri, 31 May 2024 13:18:33 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 incrementally with one additional > commit since the last revision: > > Reconcile changes
src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 2024: > 2022: } > 2023: if (pb == (pb = b)) // base > unchanged > 2024: Thread.onSpinWait(); @DougLea Doesn't this mean that we'll always onSpinWait at least once here (since pb is initialized to -1 and not written until this check) ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/19131#discussion_r1622475121
