JDK-7143490 : G1: Remove HeapRegion::_top_at_conc_mark_count
- Type: Enhancement
- Component: hotspot
- Sub-Component: gc
- Affected Version: 8-pool
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2012-02-07
- Updated: 2013-09-18
- Resolved: 2012-05-04
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| JDK 7 | JDK 8 | Other |
|---|---|---|
7u40Fixed  |
8Fixed |
hs24Fixed |
Description
The combination of the changes for 6494965, 6888336, and 7127706 the field _top_at_conc_count should no longer be needed. With 6888336 and 7127706, the value of NTAMS (for each region) should not change as a result of performing GCs during the marking cycle. As a result the value that we currently record in _top_at_conc_count should not change between remark and cleanup. Therefore the field can be removed. At the same time, the code that adds [_top_at_conc_count, ntams) to the liveness counting (during cleanup) should now be a nop and can also be removed.
Comments
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