RFR: 8322489 : 22-b27: Up to 7% regression in all Footprint3-*-G1/ZGC [v2]

[Markus Grönlund]

> Greetings,
> 
> A footprint regression was accidentally introduced with [JDK-8211238](https://bugs.openjdk.org/browse/JDK-8211238).
> 
> A small part of the JFR system had to be initialized early to support the functionality. We later decided that we only support this functionality iff the system is started with -XX:StartFlightRecording on the command-line.
> 
> This PR will adjust to only perform early initialization under this premise.
> 
> Testing: jdk_jfr
> 
> Thanks
> Markus

Markus Grönlund has updated the pull request incrementally with one additional commit since the last revision:

  adjustment

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/17179/files
  - new: https://git.openjdk.org/jdk/pull/17179/files/48b42591..ac6f6928

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17179&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17179&range=00-01

  Stats: 18 lines in 2 files changed: 8 ins; 9 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17179.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17179/head:pull/17179

PR: https://git.openjdk.org/jdk/pull/17179