On Fri, 21 Jul 2023 16:42:25 GMT, Doug Lea <d...@openjdk.org> wrote: >> This update addresses performance issues across both LinkedTransferQueue and >> SynchronousQueue by creating a common basis for implementation across them >> (mainly in LinkedTransferQueue). Pasting from internal doc summary of >> changes: >> * * Class DualNode replaces Qnode, with fields and methods >> * that apply to any match-based dual data structure, and now >> * usable in other j.u.c classes. in particular, SynchronousQueue. >> * * Blocking control (in class DualNode) accommodates >> * VirtualThreads and (perhaps virtualized) uniprocessors. >> * * All fields of this class (LinkedTransferQueue) are >> * default-initializable (to null), allowing further extension >> * (in particular, SynchronousQueue.Transferer) >> * * Head and tail fields are lazily initialized rather than set >> * to a dummy node, while also reducing retries under heavy >> * contention and misorderings, and relaxing some accesses, >> * requiring accommodation in many places (as well as >> * adjustments in WhiteBox tests). > > 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 13 additional commits since > the last revision: > > - Merge branch 'openjdk:master' into JDK-8301341 > - Address more review comments > - Address review comments > - nitpicks > - Merge branch 'openjdk:master' into JDK-8301341 > - Accommodate white-box tests; use consistent constructions; minor > improvements > - Merge branch 'openjdk:master' into JDK-8301341 > - Simplify contention handling; fix test > - Fix inverted test assert; improve internal documentation; simplify code > - Merge branch 'openjdk:master' into JDK-8301341 > - ... and 3 more: https://git.openjdk.org/jdk/compare/37ac993c...f53cee67
Like Doug notes, the JDK backports are managed as a separate project. Details are available here https://openjdk.org/projects/jdk-updates/. For JDK 17 the corresponding project is https://wiki.openjdk.org/display/JDKUpdates/JDK+17u which has the necessary details about the process as well as the mailing list details where you can bring up the backporting question. ------------- PR Comment: https://git.openjdk.org/jdk/pull/14317#issuecomment-2204851286
