RFR: 8358621: Reduce busy waiting in worse case at the synchronization point returning from native in CPU Time Profiler [v2]

[Johannes Bechberger]

> Simple optimization to reduce busy waiting in safepoint handlers.

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

  Use SpinYield

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26314/files
  - new: https://git.openjdk.org/jdk/pull/26314/files/7fe92854..ad67f51c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26314&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26314&range=00-01

  Stats: 7 lines in 1 file changed: 1 ins; 4 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26314.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26314/head:pull/26314

PR: https://git.openjdk.org/jdk/pull/26314