> A jdk.VirtualPinnedEvent JFR event is recorded by Object::wait when a virtual > thread waits in Object.wait while pinned. The posting of the event in > ObjectMonitor::wait is done after waiting but it can block again in > enter/ReenterI before it re-acquires. If that happens then the event duration > won't be accurate, and for the off-list case, the enter may be contended and > a jdk.VirtualPinnedEvent event will be recorded for contended monitor enter. > The changes to fix this are small: move the post of the event for Object.wait > to end of the wait function, and only post an event for contended monitor > enter when not waiting. > > I've added a test to check the pinned event that is recored for several > contended monitor enter and Object.wait cases. It checks the event duration > and that only one event is recorded for each case.
Alan Bateman has updated the pull request incrementally with one additional commit since the last revision: testObjectWait2 test already owns lock ------------- Changes: - all: https://git.openjdk.org/jdk/pull/22718/files - new: https://git.openjdk.org/jdk/pull/22718/files/2dfee538..47643726 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=22718&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22718&range=00-01 Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/22718.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/22718/head:pull/22718 PR: https://git.openjdk.org/jdk/pull/22718
