JDK-8129558 : Coalesce dead objects during removal of self-forwarded pointers
- Type: Enhancement
- Component: hotspot
- Sub-Component: gc
- Affected Version: 9
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- Submitted: 2015-06-23
- Updated: 2015-09-10
- Resolved: 2015-07-07
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| JDK 9 |
|---|
9 b74Fixed  |
Related Reports
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Relates :
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Description
During fixing up self-forwarded pointers created by evacuation failure we walk the heap object by object, fixing up BOT, mark bitmap object by object, both for dead and live objects. It would be a lot faster to coalesce dead objects into single filler objects and do the BOT update/mark bitmap work on that scale. This significantly reduces the number of updates, increasing performance.