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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 15
Affects Version/s: 8-shenandoah, 11-shenandoah, 13, 14, 15
Component/s: hotspot
Labels:

Subcomponent:
gc
Resolved In Build:
b15
CPU:

generic
OS:

generic

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8243599	14.0.2	Roman Kennke	P4	Resolved	Fixed	b04

Currently, we set the safe-iteration-limit at start of update-refs-phase. This is subsequently used as limit for the linear scan in update-refs phase. However, with the strong invariant we can do better: we can set this limit at evac-start, because it is guaranteed that any reference that is written to the new fields is to-space and does not require updating.

An exception is new allocations for evacuated objects: those still require updates and thus require special handling.

backported by

JDK-8243599 Shenandoah: Avoid updating new regions from start of evacuation

Resolved

relates to

JDK-8240873 Shenandoah: Short-cut arraycopy barriers

Resolved

JDK-8241534 Shenandoah: region status should include update watermark

Resolved

JDK-8243291 Shenandoah: no need to retire TLABs at Init Update Refs

Resolved

JDK-8247860 Shenandoah: add update watermark line in rich assert failure message

Resolved

Assignee:: Roman Kennke

Reporter:: Roman Kennke

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Created:: 2020-03-11 05:02

Updated:: 2022-02-24 12:45

Resolved:: 2020-03-12 09:47

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