On Wed, 22 May 2024 15:32:42 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 36 additional commits since > the last revision: > > - 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 > - Merge branch 'openjdk:master' into JDK-8322732 > - Next version > - Merge branch 'openjdk:master' into JDK-8322732 > - Reduce unneeded signals > - Merge branch 'openjdk:master' into JDK-8322732 > - ... and 26 more: https://git.openjdk.org/jdk/compare/bdb1c0d3...f1fc4f3e
src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 2053: > 2051: WorkQueue[] qs; > 2052: int spins = ((short)(qc >>> TC_SHIFT) << 1) + > SPIN_WAITS + 1; > 2053: while (((p = w.phase) & IDLE) != 0 && --spins > 0) Nice catch on the spins :) ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/19131#discussion_r1610252517
