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Type: Enhancement
Resolution: Fixed
Priority: P3
Fix Version/s: 19
Affects Version/s: 19
Component/s: hotspot
Labels:

Subcomponent:
gc
Resolved In Build:
b03

Currently the evacuation failure handling is recording the failed objects during evacuation in a set backed by G1SegmentedArray. Later when processing the objects the set needs to be sorted to allow for efficient zapping of the areas between the live objects. During this phase we also mark the live objects in the prev mark bitmap to allow for correct verification.

We can optimize away the sorting part mention above by directly mark failing objects in the mark bitmap and use the marks to know which objects needs processing.

relates to

JDK-8254739 G1: Optimize evacuation failure for regions with few failed objects

Resolved

JDK-7162317 G1: Explicitly mark self-forwarded objects during marking cycles

Closed

JDK-8276094 JEP 423: Region Pinning for G1

Closed

JDK-8283188 Build time regression caused by JDK-8278917

Resolved

JDK-8289598 Investigate use of bulk bit clearing during G1 Full GC

Open

JDK-8256265 G1: Improve parallelism in regions that failed evacuation

Resolved

links to

Commit openjdk/jdk/f4f2f32c

Review openjdk/jdk/6867

(1 relates to, 2 links to)

Assignee:: Stefan Johansson

Reporter:: Stefan Johansson

Votes:: 0 Vote for this issue

Watchers:: 5 Start watching this issue

Created:: 2021-12-16 08:00

Updated:: 2023-04-18 08:12

Resolved:: 2021-12-21 06:11

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