JDK-6889757 : G1: enable card mark elision for initializing writes by compiler (ReduceInitialCardMarks)
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: hs17
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2009-10-08
  • Updated: 2013-09-18
  • Resolved: 2009-11-11
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JDK 6 JDK 7 Other
6u18Fixed 7Fixed hs16Fixed
Related Reports
Relates :  
Relates :  
ReduceInitialCardMarks-enabled card mark elision of initializing
writes has been in the code base for a while (since 6u10/hs11) but has
been  disabled for G1. The changes needed to fix 6888898 should
allow that optimization to be enabled for G1 as well.

EVALUATION http://hg.openjdk.java.net/hsx/hsx16/master/rev/aa001a20bd61

EVALUATION http://hg.openjdk.java.net/hsx/hsx16/baseline/rev/aa001a20bd61

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/39b01ab7035a