Greetings, JDK-8243962 has been a large effort to chase down intermittent timeouts for certain JVMTI tests when run on Windows debug builds in combination with JFR. The background is long, included in JDK-8243962.
In short, the combination of some JVMTI thread suspension tests when run together with JFR on saturated Windows 2016 debug builds can intermittently time out. There have been two major changes made to JFR derived from JDK-8243962 (linked therein) in an attempt to reduce the poor scalability observed. Unfortunately, the efforts have not fully resolved the situation entirely as there have still been intermittent sightings for the following tests: vmTestbase/nsk/jvmti/scenarios/sampling/SP04/sp04t002/TestDescription.java vmTestbase/nsk/jvmti/scenarios/sampling/SP04/sp04t001/TestDescription.java vmTestbase/nsk/jvmti/scenarios/sampling/SP03/sp03t001/TestDescription.java vmTestbase/nsk/jvmti/scenarios/sampling/SP03/sp03t002/TestDescription.java This change will add a requires expression to these tests to exclude the combination of running them with JFR on Windows debug builds. Thanks Markus ------------- Commit messages: - 8243962: Various JVM TI tests time out using JFR on Windows Changes: https://git.openjdk.java.net/jdk/pull/712/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=712&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8243962 Stats: 8 lines in 4 files changed: 8 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/712.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/712/head:pull/712 PR: https://git.openjdk.java.net/jdk/pull/712
