JDK-8242114 : Shenandoah: remove ShenandoahHeapRegion::reset_alloc_metadata_to_shared
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 8-shenandoah,11-shenandoah,14,15
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2020-04-03
  • Updated: 2022-02-24
  • Resolved: 2020-04-06
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JDK 14 JDK 15
14.0.2Fixed 15 b18Fixed
Related Reports
Blocks :  
JDK-8242082 - Shenandoah: Purge Traversal mode
Blocks :  
JDK-8241841 - Shenandoah: ditch one of allocation type counters in ShenandoahHeapRegion
Description
This is a follow-up after removal of shared-alloc-counter (JDK-8241841) and removal of Traversal (JDK-	8242082). ShenandoahHeapRegion::reset_alloc_metadata_to_shared is now the same as ShenandoahHeapRegion::reset_alloc_metadata. Humongous allocation path also does not need resets, because the alloc metadata is already clean there.
Comments
Fix Request (14u) This improves Shenandoah performance and provides ground for future backports. Patch applies cleanly to 14u, passes hotspot_gc_shenandoah, tier{1,2,3} with Shenandoah enabled. The patch is fully contained in Shenandoah code.
01-05-2020
URL: https://hg.openjdk.java.net/jdk/jdk/rev/4d759a99c277 User: shade Date: 2020-04-06 08:32:08 +0000
06-04-2020