RFR: 8351594: JFR: Rate-limited sampling of Java events [v8]

[Erik Gahlin]

> Could I have review of an enhancement that adds rate-limited sampling to Java events, including five events in the JDK (SocketRead, SocketWrite, FileRead, FileWrite, and JavaExceptionThrow).
> 
> Testing: test/jdk/jdk/jfr
> 
> Thanks
> Erik

Erik Gahlin has updated the pull request incrementally with two additional commits since the last revision:

 - Remove the mistakenly added file.
 - Fix whitespace

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25559/files
  - new: https://git.openjdk.org/jdk/pull/25559/files/7f26f172..8beb194a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25559&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25559&range=06-07

  Stats: 414 lines in 3 files changed: 0 ins; 410 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/25559.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25559/head:pull/25559

PR: https://git.openjdk.org/jdk/pull/25559