RFR: 8325553: Parallel: Use per-marker cache for marking stats during Full GC

Fri Feb 9 12:11:10 UTC 2024

Add cache to avoid too much contentious writes to global marking stats.

Test: tier1-6; using the attached bm, ~30% reduction in pause-time is observed. Only marginal improvement (probably just noise) is observed in BigRamTester.

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Commit messages:
 - pgc-full-gc-cache

Changes: https://git.openjdk.org/jdk/pull/17788/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17788&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325553
  Stats: 104 lines in 5 files changed: 102 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17788.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17788/head:pull/17788

PR: https://git.openjdk.org/jdk/pull/17788