JDK-6672698 : mangle_unused_area() should not remangle the entire heap at each collection.
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 7
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2008-03-07
  • Updated: 2010-05-09
  • Resolved: 2008-08-29
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JDK 6 JDK 7 Other
6u14Fixed 7Fixed hs14Fixed
Related Reports
Relates :  
mangle_unused() writes a pattern into the unused part of the heap in debug mode.
If the heap is large, this can cause excessively long GC's to the point
that tests timeout.

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/12eea04c8b06

EVALUATION managle_unused_area() only mangles from top to end in a space. Set some artificial limit on the amount that will be mangled at each collection.