> 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/3e585ff1...f53cee67 ------------- Changes: - all: https://git.openjdk.org/jdk/pull/14317/files - new: https://git.openjdk.org/jdk/pull/14317/files/7c64a933..f53cee67 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=14317&range=09 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14317&range=08-09 Stats: 5915 lines in 182 files changed: 4676 ins; 702 del; 537 mod Patch: https://git.openjdk.org/jdk/pull/14317.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14317/head:pull/14317 PR: https://git.openjdk.org/jdk/pull/14317
