JDK-8259231 : Epsilon: improve performance under contention during virtual space expansion
- Type: Enhancement
- Component: hotspot
- Sub-Component: gc
- Affected Version: 11,16,17
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2021-01-05
- Updated: 2021-03-09
- Resolved: 2021-01-06
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| JDK 11 | JDK 16 | JDK 17 |
|---|---|---|
| 11.0.11Fixed | 16.0.1Fixed | 17 b05Fixed  |
Description
This is on behalf of <lehuading@tencent.com> The `EpsilonHeap::allocate_work` method maybe can be fixed and improved by this: 1. it can prevent allocate failure by retry `_space->par_allocate` before expanding virtual space, when there not enough virtual space but another thread expanding succeeded just and has enough space. 2. it can reduce the lock time by move `res = _space->par_allocate(size);` out of lock scope.
Comments
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