On Mon, 12 Aug 2024 17:07:42 GMT, Doug Lea <d...@openjdk.org> wrote: > The Exchanger class uses spin-waits that are hostile to some uses of > VirtualThreads. Improving this requires a means of estimating whether there > are many VirtualThreads with few carriers, which can be supported by adding a > method in class ForkJoinWorkerThread. This enables a reworking of the > exchange method, and can also be used to deal with similar issues in > LinkedTransferQueue and possibly elsewhere. We leave for now open whether > this method (hasKnownQueuedWork) should be public, which would allow users to > use it in similar contexts, at the possible expense of revealing too much > about current VT implementation
This pull request has now been integrated. Changeset: ab8071d2 Author: Doug Lea <d...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/ab8071d28027ecbf5e8984c30b35fa1c2d934de7 Stats: 423 lines in 3 files changed: 94 ins; 172 del; 157 mod 8338146: Improve Exchanger performance with VirtualThreads Reviewed-by: alanb ------------- PR: https://git.openjdk.org/jdk/pull/20554
