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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 18
Affects Version/s: 13
Component/s: hotspot
Labels:
- gc-g1
- gc-pending-review

Subcomponent:
gc
Resolved In Build:
b12

G1SharedDirtyCardQueue is lock-based, using Shared_DirtyCardQ_lock, which needs to have access-related rank. It could be made lock-free.

Making it lock-free involves some additional complexity. There is a tradeoff between that complexity vs having an access-related rank lock. The situation where the shared queue is needed is extremely rare, so contention for the lock isn't an issue.

blocks

JDK-8272480 Remove Mutex::access rank

Resolved

relates to

JDK-8139652 Mutator refinement processing should take the oldest dirty card buffer

Resolved

JDK-8214997 Crash holding 'access' lock can deadlock in JVMCI compiler thread

Closed

JDK-8279957 Main refinement thread tries to wake up itself when re-enqueuing causing assertion failure

Closed

JDK-8220240 Refactor shared dirty card queue

Resolved

links to

Commit openjdk/jdk/0597cde8

Review openjdk/jdk/5118

(2 links to)

Assignee:: Kim Barrett

Reporter:: Kim Barrett

Votes:: 0 Vote for this issue

Watchers:: 3 Start watching this issue

Created:: 2019-03-23 00:56

Updated:: 2022-02-09 22:42

Resolved:: 2021-08-24 06:19

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