JDK-8213113 : Dead code related to UseAdaptiveSizePolicy in ParNewGeneration
- Type: Enhancement
- Component: hotspot
- Sub-Component: gc
- Affected Version: 12
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2018-10-30
- Updated: 2018-11-15
- Resolved: 2018-11-09
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| JDK 12 |
|---|
12 b20Fixed  |
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Description
Because CMS does not support UseAdaptiveSizePolicy, code blocks guarded by UseAdaptiveSizePolicy are dead code in ParNewGeneration. This includes: ParNewGeneration::_survivor_overflow and its accessor methods; calls to size_policy->minor_collection_begin(), size_policy->minor_collection_end(), size_policy->avg_survived()->sample(). We should remove most code except minor_collection_begin() and minor_collection_end(), which could be used by UseGCOverheadLimit if it works for CMS in the future.