RFR: 8346875: Test jdk/jdk/jfr/event/os/TestCPULoad.java fails on macOS [v2]

[Matthias Baesken]

> The test fails on some new Mac instances (macOS 14.5 (macOS aarch64) , CPU Apple M2) with :
> java.lang.AssertionError: Expected at least one event
> at jdk.jfr.event.os.TestCPULoad.main(TestCPULoad.java:62)
> at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
> at java.base/java.lang.reflect.Method.invoke(Method.java:565)
> at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
> at java.base/java.lang.Thread.run(Thread.java:1447)
> 
> The current sleep value seems to be a bit too slow for those machines.  The issues occured (mostly) with fastdebug binaries.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  adjust the program, burn some cycles instead

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/23136/files
  - new: https://git.openjdk.org/jdk/pull/23136/files/ad334587..382a12f6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23136&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23136&range=00-01

  Stats: 22 lines in 1 file changed: 19 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/23136.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23136/head:pull/23136

PR: https://git.openjdk.org/jdk/pull/23136