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[GR-44787] Parallelize full garbage collections. #6551

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[GR-44787] Parallelize full garbage collections. #6551

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petermz added 30 commits August 11, 2022 15:22
@petermz
Noop thread using volatile flags and busy wait
1533d7b
@petermz
Noop thread with safepoints and synchronization
6195b82
@petermz
OldGeneration.scanGreyObjects() runs on worker thread (but logging cr…
3dfd353 
…ashes)
@petermz
Worker thread synchronizing via a queue, never put on safepoint
ce6b153
@petermz
Two parallel workers synchronizing via queue
674df60
@petermz
releaseSpaces stage working on 2 background threads
ae4f77f
@petermz
Added a custom Timer to HeapImpl
7db5c49
@petermz
Parallel dirtyCardIfNecessary
aef1e38
@petermz
Parallel objRef update
54683ec
@petermz
Passing original object safely via Pointer
2bfc96e
@petermz
installFwPtr works but not on workers
7d69248
@petermz
installForwardingPointer works on parallel threads
f036854
@petermz
enableRememberedSetForObject works in parallel
b8dd7c8
@petermz
Protect against promoting an object twice.
ac78015 
Crashes frequently in FOT (:183,:256), so use `-H:-UseRememberedSet`
@petermz
Uninlined several methods
d8b11d0
@petermz
Parallel memory allocation in to-space.
0820d8d 
Simple test works on 4 threads, HyperAlloc on 1 thread
@petermz
Better sync strategy in HeapChunk.walkObjectsFromInline
980155b
@petermz
Simplified parallel invocation, assuming complete gc, innerOffset=0, …
66aa7fc 
…and aligned chunk
@petermz
Restored call to Space.promoteAlignedObject()
d526393
@petermz
Restored call to GCImpl.promoteObject()
3bf93c0
@petermz
Restored call to GreyToBlackObjRefVisitor.visitObjectReferenceInline()
1b15e01
@petermz
Extended TaskQueue to 1024 task items
043da38
@petermz
Put objects on the queue rather than refs
0d936b0
@petermz
Don't put G2BObjectVisitor instances on TaskQueue
d47b6d2
@petermz
Added max queue size statistic
239c849
@petermz
Made TaskQueue private in ParallelGCImpl
e04d49a
@petermz
Queue grey objects instead of scanning chunks
6b692e2
@petermz
Queue unaligned objects for parallel scan
69bbd0d
@petermz
TaskQueue fixes: drain and idleCount
23b19ac
@petermz
Made TaskQueue reference-free
57e8275
@oracle-contributor-agreement oracle-contributor-agreement bot added the OCA Verified All contributors have signed the Oracle Contributor Agreement. label May 4, 2023
@christianhaeubl christianhaeubl mentioned this pull request May 4, 2023
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@graalvmbot graalvmbot force-pushed the chaeubl/GR-44787-v3 branch from 8c7522a to c698f80 Compare May 5, 2023 08:21
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Closing this PR because it is outdated. #5362 is the PR that will be integrated eventually.

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@graalvmbot @christianhaeubl @zakkak @petermz