RFR: 8378806: Genshen: Add scope of collection to end of cycle message in JMX notification

Fri Feb 27 01:25:14 UTC 2026

Right now, the action field in ShenandoahCycles bean's GC notification is just "end of GC cycle". It would be better if the generational mode's event indicated whether it was a young, old or global cycle.

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Commit messages:
 - Missed test on initial commit
 - Include generation name in end of cycle message

Changes: https://git.openjdk.org/jdk/pull/29950/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29950&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8378806
  Stats: 99 lines in 3 files changed: 98 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/29950.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29950/head:pull/29950

PR: https://git.openjdk.org/jdk/pull/29950