[jdk17u-dev] RFR: 8279856: Parallel: Use PreservedMarks to record promotion-failed objects

Roman Kennke rkennke at openjdk.org
Fri Nov 17 16:19:01 UTC 2023


This backports (JDK-8279856)[https://bugs.openjdk.org/browse/JDK-8279856] to jdk17u. The change fixes a considerable performance problem in Parallel GC. The original change has baked in mainline since JDK19 and has not accrued any bug-tail, yet.

Testing:
 - [x] hotspot_gc
 - [x] tier1 (+UseParallelGC)
 - [x] tier2 (+UseParallelGC)
 - [x] tier3 (+UseParallelGC)
 - [ ] tier4 (+UseParallelGC)

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

Commit messages:
 - Backport 16ec47d5e5bf129fc0910358464ab62bf6ce7ed8

Changes: https://git.openjdk.org/jdk17u-dev/pull/1964/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1964&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8279856
  Stats: 24 lines in 5 files changed: 12 ins; 8 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1964.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1964/head:pull/1964

PR: https://git.openjdk.org/jdk17u-dev/pull/1964


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