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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 14
Affects Version/s: 11
Component/s: hotspot
Labels:
- gc-parallel
- refactoring

Subcomponent:
gc

All collectors but parallel gc use WorkGang to implement parallelism.

This again and again causes us to add an additional abstraction layer above any code that tries to use parallel threads for all collectors (evacuation failure, dynamic thread sizing, reference processing, ...).

Further the parallel gc task queue mechanism has disadvantages:
- the work (tasks) must be known beforehand
- getting work from the task queue incurs taking a global lock which is actually known for being inefficient in literature already

Investigate to replace the parallel gc task queue mechanism with a work gang.

proposed solution:
~~JDK-8224659~~
~~JDK-8224660~~
~~JDK-8224661~~
~~JDK-8224662~~
~~JDK-8224663~~
~~JDK-8224664~~
~~JDK-8224665~~
~~JDK-8224666~~

blocks

JDK-8210100 ParallelGC should use parallel WeakProcessor

Resolved

relates to

JDK-8224660 Parallel GC: Use WorkGang (2: MarksFromRootsTask)

Resolved

JDK-8224661 Parallel GC: Use WorkGang (3: UpdateDensePrefixAndCompactionTask)

Resolved

JDK-8224662 Parallel GC: Use WorkGang (4: SharedRestorePreservedMarksTaskExecutor)

Resolved

JDK-8224663 Parallel GC: Use WorkGang (5: ScavengeRootsTask)

Resolved

JDK-8224664 Parallel GC: Use WorkGang (6: PSRefProcTaskProxy)

Resolved

JDK-8224665 Parallel GC: Use WorkGang (7: remove task manager)

Resolved

JDK-8224666 Parallel GC: Use WorkGang (8: obsolete and remove flags)

Resolved

JDK-8231670 Remove TaskExecutor abstraction used in preserved marks processing

Resolved

JDK-8231672 Simplify the reference processing parallelization framework

Resolved

JDK-4996670 RFE: ParallelScavenge needs NoResourceMarkVerifier guards

Closed

JDK-8231669 Remove WorkerManager abstraction to support multiple work gang implementations

Closed

JDK-8267214 assert(cm->region_stack()->is_empty()) failed: Region stack 0 is not empty

Closed

JDK-8204686 Dynamic parallel reference processing support for Parallel GC

Resolved

JDK-8224659 Parallel GC: Use WorkGang (1: PCRefProcTask)

Resolved

(10 relates to)

Assignee:: Leo Korinth

Reporter:: Thomas Schatzl

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Created:: 2018-06-13 03:20

Updated:: 2021-05-17 03:15

Resolved:: 2019-08-30 01:29

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