> The implementation of Thread.yield for virtual threads is currently a "lazy > submit". This means the task for the virtual thread is queued to the > carrier/worker local queue without signalling other threads. This behavior > can be surprising/unfair when there are tasks in the submission queues, say > when a platform thread has started or unparked a virtual thread. > > Ron, Doug Lea, Viktor Klang and I have discussed this topic and propose to > change Thread.yield to use "external submit" when the local task queue is > empty, and to push to the local queue when not empty. The change improves the > fairness but will of course increase the chances that repeated Thread.yield > will bounce between carriers.
Alan Bateman 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 five additional commits since the last revision: - Merge - Fix typo in test comment - Reduce instanceof checks - Update - Initial commit ------------- Changes: - all: https://git.openjdk.org/jdk/pull/11533/files - new: https://git.openjdk.org/jdk/pull/11533/files/2e707757..151cbd0d Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=11533&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11533&range=00-01 Stats: 12718 lines in 291 files changed: 8666 ins; 2982 del; 1070 mod Patch: https://git.openjdk.org/jdk/pull/11533.diff Fetch: git fetch https://git.openjdk.org/jdk pull/11533/head:pull/11533 PR: https://git.openjdk.org/jdk/pull/11533
