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[GR-44787] Parallelize full garbage collections. #6909

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[GR-44787] Parallelize full garbage collections. #6909

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@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
petermz and others added 28 commits April 28, 2023 18:16
@petermz
Merge branch 'master' of github.com:oracle/graal into parallel-gc
c87e357
@christianhaeubl
Merge with master.
5a820e0
@christianhaeubl
Cleanups.
91eec09
@christianhaeubl
Fix counter initialization.
cc7b107
@christianhaeubl
Fix an overflow.
c4957c6
@christianhaeubl
Fix a race that could result in an incorrect remembered set.
ad940e9
@christianhaeubl
Support unattached threads in VMError.shouldNotReachHere().
b338cb3
@christianhaeubl
Various cleanups and fixes for the parallel GC.
c698f80
@christianhaeubl
Throw an error if the parallel GC is used on other platforms than Lin…
2e11172 
…ux and macOS.
@christianhaeubl
Style fix.
24051eb
@christianhaeubl
Verify that SpawnIsolates is enabled if the ParallelGC is used.
6ea15c5
@christianhaeubl
Fix parallel GC teardown.
101726a
@christianhaeubl
Fix identity hashcode computation.
393bb27 
Cleanups.
@christianhaeubl
Fix validation of UseParallelGC option.
657f774
@christianhaeubl
Avoid that unattached threads are interpreted as the error handling t…
91e3177 
…hread.
@christianhaeubl
Skip the parallel GC phase if there isn't any work.
35013d3
@christianhaeubl
Cleanups.
31bb51d
@petermz
Fixed race in reference processing
0c55642
@petermz
Fixed racy assertion in GreyToBlackObjRefVisitor
383484a
@petermz
Merge branch 'master' of github.com:oracle/graal into parallel-gc
c5190e1
@petermz
Fixed assertion that broke SerialGC
1e02a09
@christianhaeubl
Merge with master.
e520318
@christianhaeubl
Added some documentation.
c38406c
@petermz
Fixed some races
59c56b0
@christianhaeubl
Merge with master.
73f0b54
@christianhaeubl
Fix an issue where the parallel GC could destroy the array length.
e43b3e9
@christianhaeubl
Fix the object size used in retractAllocation().
80f27d4
@christianhaeubl
Support the parallel GC on Windows.
2047127
@oracle-contributor-agreement oracle-contributor-agreement bot added the OCA Verified All contributors have signed the Oracle Contributor Agreement. label Jun 29, 2023
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3 participants
@graalvmbot @christianhaeubl @petermz