> The `com/sun/management/ThreadMXBean/ThreadCpuTimeArray.java` can transiently > fail when run with `-Xcomp`. This happens when the compilation of methods on > the worker threads interleaves with the 2 calls on the main thread to > `mbean.getThreadCpuTime` to get the CPU time for all worker threads. > > The way the test is currently written, the worker threads are all usually > waiting on a shared monitor when the 2 timings are taken. That is, in a > successful run, the delta between the timings is always 0. When `-Xcomp` > compilations kick in at the "wrong" time or take sufficiently long, the > expected delta of 100 nanoseconds is easily exceeded. > > It does not make sense to run a timing test with such a small expected delta > with `-Xcomp` so this PR simply ignores the test when `-Xcomp` is present.
Doug Simon has updated the pull request incrementally with one additional commit since the last revision: fix date in header ------------- Changes: - all: https://git.openjdk.org/jdk/pull/17675/files - new: https://git.openjdk.org/jdk/pull/17675/files/4ff2f7cd..a3bc2653 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=17675&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17675&range=00-01 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/17675.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/17675/head:pull/17675 PR: https://git.openjdk.org/jdk/pull/17675
