JDK-7005808 : G1: re-enable ReduceInitialCardMarks for G1
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 7
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2010-12-09
  • Updated: 2013-09-18
  • Resolved: 2012-01-23
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JDK 7 JDK 8 Other
7u4Fixed 8Fixed hs23Fixed
Related Reports
Relates :  
Relates :  
ReduceInitialCardMarks created instability issues in G1 (6920109: G1: lingering instabilities with ReduceInitialCardMarks) because of a defect in G1 that allowed TLABs to be allocated into the old generation (see 6974966: G1: unnecessary direct-to-old allocations). The fix for 6974966 totally eliminated direct-to-old allocations (TLAB or non-TLAB allocations) so we should re-enable ReduceInitialCardMarks for G1 as the main issue that caused the instabilities should be been eliminated.


EVALUATION http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/246daf2c601d

EVALUATION See Description.