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Enhancement
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Resolution: Fixed
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P4
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17, 19
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b08
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-8320514 | 17.0.10 | Roman Kennke | P4 | Resolved | Fixed | b04 |
At the end of a Young-GC, we walk the whole young-gen to find promotion-failed objs.
```
void PSScavenge::clean_up_failed_promotion() {
...
RemoveForwardedPointerClosure remove_fwd_ptr_closure;
young_gen->object_iterate(&remove_fwd_ptr_closure);
...
}
```
This can be quite expensive, especially #promotion-failed objs is ususally small if any.
An alternative is to use `PreservedMarks` to record those promotion-failed objs. (`PreservedMarks` is originally used for objs whose markWord must be preserved, `markWord::must_be_preserved`.)
```
void PSScavenge::clean_up_failed_promotion() {
...
RemoveForwardedPointerClosure remove_fwd_ptr_closure;
young_gen->object_iterate(&remove_fwd_ptr_closure);
...
}
```
This can be quite expensive, especially #promotion-failed objs is ususally small if any.
An alternative is to use `PreservedMarks` to record those promotion-failed objs. (`PreservedMarks` is originally used for objs whose markWord must be preserved, `markWord::must_be_preserved`.)
- backported by
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JDK-8320514 Parallel: Use PreservedMarks to record promotion-failed objects
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- Resolved
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- relates to
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- Resolved
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- Resolved
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- links to
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Commit
openjdk/jdk17u-dev/40c29f7d
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Commit
openjdk/jdk/16ec47d5
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Review
openjdk/jdk17u-dev/1964
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Review
openjdk/jdk/7028
(2 links to)