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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 14
Affects Version/s: 14
Component/s: hotspot
Labels:
- gc-g1
- gc-pending-review

Subcomponent:
gc
Resolved In Build:
b26

Currently a remembered set's occupancy is calculated from its components. This is problematic for a few reasons:

- slow on remembered sets with lots of components, which causes lots of additional code to avoid recalculation or mitigations
- may cause the total count going down temporarily when calculating during coarsening; attempting to account for this adds additional code

Particularly for updating predictions at mutator time such a temporary wrong value may cause unexpected prediction results.

blocks

JDK-8231579 G1's incremental calculation of region elapsed time always uses the same age group for prediction

Resolved

is blocked by

JDK-8233997 Some members of HeapRegion are not cleared in HeapRegion::hr_clear()

Resolved

JDK-8233998 New young regions registered too early in collection set

Resolved

relates to

JDK-8237500 Increase the G1 eager reclaim candidate selection threshold

Open

JDK-8267836 Separate eager reclaim remembered set threshold from G1RSetSparseRegionEntries

Resolved

JDK-8017163 G1: Refactor remembered sets

Resolved

(1 relates to)

Assignee:: Thomas Schatzl

Reporter:: Thomas Schatzl

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Created:: 2019-11-11 07:06

Updated:: 2021-05-27 01:23

Resolved:: 2019-12-02 05:26

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