RFR: 8366240: Improve memory ordering in new CPU Time Profiler [v2]

[Johannes Bechberger]

> Remove acq-rel semantics where it isn't needed.

Johannes Bechberger has updated the pull request incrementally with one additional commit since the last revision:

  Extend comment

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26960/files
  - new: https://git.openjdk.org/jdk/pull/26960/files/f8dfe276..fbb21255

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26960&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26960&range=00-01

  Stats: 7 lines in 1 file changed: 7 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26960.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26960/head:pull/26960

PR: https://git.openjdk.org/jdk/pull/26960