RFR: 8342818: Implement CPU Time Profiling for JFR [v38]

Fri Mar 7 15:24:26 UTC 2025

> This is the code for the [JEP draft: CPU Time based profiling for JFR].

Johannes Bechberger has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 179 commits:

 - Only renew buffer if needed
 - Tiny improvements
 - Fix unlocking
 - Fix deadlock
 - Increase queue size
 - Improve lock placement
 - Don't bitpack for now
 - Bit packing
 - Fix compile
 - Fix for non-linux build
 - ... and 169 more: https://git.openjdk.org/jdk/compare/efc597bf...53a2560d

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Changes: https://git.openjdk.org/jdk/pull/20752/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20752&range=37
  Stats: 2943 lines in 63 files changed: 2674 ins; 198 del; 71 mod
  Patch: https://git.openjdk.org/jdk/pull/20752.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20752/head:pull/20752

PR: https://git.openjdk.org/jdk/pull/20752