RFR: 8267894: Skip work for empty regions in G1 Full GC [v2]

[Ivan Walulya]

> Hi all,
> 
> Please review this change to skip doing work on regions that were empty at the beginning of the Full GC in phases that execute on a per-region basis.
> 
> Testing: Tier 1-3.

Ivan Walulya has updated the pull request incrementally with one additional commit since the last revision:

  changes proposeed by kstefanj review

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5143/files
  - new: https://git.openjdk.java.net/jdk/pull/5143/files/ea9582fb..f196ea48

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5143&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5143&range=00-01

  Stats: 19 lines in 6 files changed: 2 ins; 1 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5143.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5143/head:pull/5143

PR: https://git.openjdk.java.net/jdk/pull/5143