> 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 incrementally with one additional commit since the last revision: Address review comments ------------- Changes: - all: https://git.openjdk.org/jdk/pull/14317/files - new: https://git.openjdk.org/jdk/pull/14317/files/b5e7e8b8..7c64a933 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=14317&range=08 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14317&range=07-08 Stats: 13 lines in 1 file changed: 7 ins; 0 del; 6 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
