On Mon, 12 May 2025 23:19:58 GMT, Serguei Spitsyn <sspit...@openjdk.org> wrote:
> The tests `SuspendResume1`, `SuspendResume2` and `SuspendResumeAll` are > intermittently failed with a timeout (deadlock). The tests run with > `-Djdk.virtualThreadScheduler.maxPoolSize=1` so there is only one carrier. > The short sleep in `TestedThread.run` isn't sufficient to make progress. This > will happen if tasks pushed by the delayed scheduler are executing before the > tasks for the newly started virtual thread. FJP won't search other submission > queues until the queue it keeps going back to is empty or there is > contention. These deadlocks can be made better reproducible if the sleep in > `TestedThread.run` is made minimal (1 millisecond). > The fix is to increase the sleep to 50 milliseconds and also to decrease the > busy part of the busy loop. > > Testing: > - Mach5 test runs of the fixed tests This pull request has now been integrated. Changeset: 265bc5f4 Author: Serguei Spitsyn <sspit...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/265bc5f47d4c0b973fd09d3c2d7576f5f786399f Stats: 12 lines in 3 files changed: 0 ins; 0 del; 12 mod 8353496: SuspendResume1.java and SuspendResume2.java timeout after JDK-8319447 Reviewed-by: cjplummer, alanb ------------- PR: https://git.openjdk.org/jdk/pull/25194
