RFR: 8304375: jdk/jfr/api/consumer/filestream/TestOrdered.java failed with "Expected at least some events to be out of order! Reuse = false"

[Erik Gahlin]

Could I have a review of a test fix.

Not sure why the test fails. The only way I can see is if several events get the exactly the same timestamp. Seems unlikely, but I added a loop to ensure the clock advances on every thread/core and logged the timestamp, so if it fails again, we have more information.

Testing: jdk/jfr/api/consumer/filestream/TestOrdered.java 

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/14128/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14128&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8304375
  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14128.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14128/head:pull/14128

PR: https://git.openjdk.org/jdk/pull/14128