JDK-8231734 : G1DirtyCardQueueSet assumed to use 0 start for G1FreeIdSet
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 14
  • Priority: P4
  • Status: Closed
  • Resolution: Not an Issue
  • Submitted: 2019-10-01
  • Updated: 2025-09-23
  • Resolved: 2025-09-23
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Other
tbdResolved
Related Reports
Relates :  
JDK-8340827 - JEP 522: G1 GC: Improve Throughput by Reducing Synchronization
Relates :  
JDK-8342382 - Implement JEP 522: G1 GC: Improve Throughput by Reducing Synchronization
Description
There are various places that (unchecked) assume the start index for the free id set in DCQS is 0.  (Look in the vicinity of uses of DCQS::num_par_ids().)  Such assumptions should be eliminated or checked.
Comments
JDK-8342382 removed the DCQS, so not applicable any more.
23-09-2025