RFR: 8292265: Add old gen used field at G1HeapSummary JFR event. [v3]

[Sangheon Kim]

> Hi all,
> 
> Can I have reviews for this change which adds 'old gen used' field at existing G1HeapSummary event?
> 
> Testing: tier1 ~ tier3
> 
> Thanks,
> Sangheon

Sangheon Kim has updated the pull request incrementally with one additional commit since the last revision:

  Albert review

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/11303/files
  - new: https://git.openjdk.org/jdk/pull/11303/files/85a4ac3a..d538cbef

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11303&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11303&range=01-02

  Stats: 8 lines in 4 files changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/11303.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11303/head:pull/11303

PR: https://git.openjdk.org/jdk/pull/11303