JDK-8202017 : Merge Reference Enqueuing phase with phase 3 of Reference processing
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 11
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2018-04-19
  • Updated: 2018-06-21
  • Resolved: 2018-05-08
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JDK 11
11 b13Fixed
Related Reports
Blocks :  
JDK-8202021 - Improve variable naming in ReferenceProcessor
Blocks :  
JDK-8202018 - Move card table clear before enqueuing pending references
Relates :  
JDK-8173211 - G1: Enqueuing dirty cards during reference enqueuing in phase 3 does not scale
Relates :  
JDK-8202780 - Remove EnqueueTask related code from ReferenceProcessor after JDK-8202017
Description
After Reference Processing there is an extra Reference Enqueue phase that iterates over all pending references.

An extra phase is not required, and can be merged with phase 3 of reference processing.

This would remove this sometimes costly iteration over all pending references another time completely, potentially saving  hundreds of ms.