JDK-6733980 : par compact - TraceGen1Time always shows 0.0000 seconds
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 5.0u6
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2008-08-05
  • Updated: 2013-04-30
  • Resolved: 2013-03-15
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JDK 8 Other
8Fixed hs25Fixed
Description
java -XX:+UseParallelOldGC -XX:+TraceGen1Time ...

always shows this output, even if the many full GCs occurred:

[Accumulated GC generation 1 time 0.0000000 secs]

Comments
EVALUATION The time is measured, but not printed out. ParallelScavengeHeap::print_tracing_info() does not test whether parallel compaction is in use.
05-08-2008