| 5496f69c0a4c2cc357a065f57b7f4ff5d9ad2fa9 |
|
17-Feb-2016 |
Hiroshi Yamauchi <yamauchi@google.com> |
Disable read barriers in GC VisitReferences calls.
It's safe to disable read barriers in the CC collector's
VisitReferences calls. It speeds up the collector by some amount,
eg. Ritzperf EAAC GC time on N5 decreases by ~4.2%.
This is based on Mathieu Chartier's idea.
Bug: 12687968
Change-Id: I884dee7018f92761fad54269f4cd01db4fa82f2a
|
| e362740479483d4eecfe11cb9ac642401c411cc3 |
|
02-Feb-2016 |
Richard Uhler <ruhler@google.com> |
Fix DCHECK compilation error.
Change-Id: I4df32cd13ad1b355302bddce1cb0fc6ff2486abe
|
| 4a26f17b055cadc949c3e9fdfa637fe5656339d9 |
|
26-Jan-2016 |
Mathieu Chartier <mathieuc@google.com> |
Remove GetImageRoots read barrier for image relocation
Fixes CC assertion that failed if an app image was loaded when the GC
was running.
Bug: 26786304
Change-Id: I47bea7b4b947332b57be2e2db604c2c25d92b7e2
|
| a9d82fe8bc6960b565245b920e99107a824ca515 |
|
26-Jan-2016 |
Mathieu Chartier <mathieuc@google.com> |
Use mutator lock to guard adding and removing heap spaces
Too hard to add a new lock since dlmalloc ArtMoreCore requires
looping through the spaces while holding the allocator lock.
Bug: 22858531
Change-Id: Ieac2136da02c766b6795cd604a58798bee37ef2a
|
| ed70b4a439acea537d55266bb9b1f309de8cbec9 |
|
18-Nov-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Relax CAS in some uses of Object::AtomicSetReadBarrierPointer.
Aside from the call to change the object from gray to black, the CAS in
AtomicSetReadBarrierPointer doesn't need to be a release CAS.
CC collector Ritz EAAC GC time: 28.4 -> 26.5s (-6.7%) on N5.
Bug: 12687968
Change-Id: Ic162717981b98e7f1e762fd6b27bd0c146187ca4
|
| 763a31ed7a2bfad22a9cb07f5301a71c0f97ca49 |
|
17-Nov-2015 |
Mathieu Chartier <mathieuc@google.com> |
Add immune spaces abstraction
ImmuneSpaces is a set of spaces which are not reclaimable by the GC in
the current collection. This set of spaces does not have requirements
about space adjacency like the old ImmuneRegion. ImmuneSpaces generates
the largest immune region for the GC. Since there is no requirement on
adjacency, it is possible to have multiple non-adjacent applicaton
image files.
For image spaces, we also look at the oat code which is normally after
the application image. In this case, we add the code as part of the
immune region. This is required to have both the boot image and the
zygote space be in the same immune region (for performance reasons).
Bug: 22858531
Change-Id: I5103b31c0e39ad63c594f5557fc848a3b288b43e
|
| 073b16c8429d302d5413e8ffc488b03b8f770780 |
|
10-Nov-2015 |
Mathieu Chartier <mathieuc@google.com> |
Image space cleanup for app images
Removed Heap::GetImageSpace, added Heap::GetBootImageSpace.
Generalized some logic in the class linker for image spaces.
Bug: 22858531
Change-Id: Ib3e12bb061a247e232d3dc93b0d6b35eb3a34d25
|
| 723e6cee35671d2dd9aeb884dd11f6994307c01f |
|
29-Oct-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Minor improvements for the CC collector.
- Split Mark() and inline its first part.
- Make sure some other routines are inlined.
- Add some UNLIKELY's.
- Use VisitConcurrentRoots().
Ritz EAAC GC time decreased from 28.9 -> 27.6s (-4.5%) on N5.
Bug: 12687968
Change-Id: I7bd13f162e7daa2a5853000fb22c5fefc318994f
|
| 10d2508b105427ef1bcaf0c222873bae7acc66d3 |
|
29-Oct-2015 |
Mathieu Chartier <mathieuc@google.com> |
Change Checkpoint API to return total number of checkpoints
Fixes a race condition with SetStateUnsafe that caused some
warnings in the Barrier::~Barrier.
The race was:
RunCheckpoint sees suspended thread, runs the checkpoint. Inside the
checkpoint, the thread state had changed to runnable by
SetStateUnsafe. This occasionally caused more Barrier::Pass than
expected.
The fix is to return the total number of checkpoints instead of just
the runnable ones.
Bug: 24191051
Change-Id: If15a933ed4c8efa66a5f27cd5feaa2e5957ae804
|
| 19eab409b3efab3889885b71db708fbe56594088 |
|
24-Oct-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Make the mark stack expandable for the CC collector.
Bug: 12687968
Change-Id: I5d05df5524f54c6adb964901e5a963eb042cb2e1
|
| fed3e2fd4919b58f8e4f8cbc317ee101f3b9af49 |
|
20-Oct-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Relax some CASes for the CC collector.
That is, removing some unnecessary memory fences.
We can use the relaxed CAS for the mark bitmap and reference field/GC
root updates because only the atomicity of the updated word matters
there.
We can use the release CAS for the read barrier bits in the lock word
because it needs to make sure the reference field updates are visible
when the object changes black from gray (the field update stores won't
be reordered after the CAS.)
The CC collector's Ritz EAAC GC time decreases from 34.7s to
29.1s (-16%) on N5.
Bug: 12687968
Change-Id: If082d5911a25fac695df66263a8f55ce8149b199
|
| a6b1ead81603513fd40b77fd72f06d8cb1f35276 |
|
06-Oct-2015 |
Mathieu Chartier <mathieuc@google.com> |
Mark breakpoint roots
Used to prevent class unloading on methods that have breakpoints.
Bug: 22720414
Change-Id: I9aee8bcbfdf253607e89dfc55a50ba3f11d99206
|
| fa75518907c2b997770ced9adb34df7c3c4665c4 |
|
01-Oct-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Improvements for table lookup read barriers.
- Implement fast paths for the GC root read barrier routines.
- Avoid unnecessary CAS operations.
Bug: 12687968
Change-Id: Iceef44e253062af5bf2295a521a9c64403deafe1
|
| 951ec2c93c79c5539cbcc669566f0808d4460338 |
|
22-Sep-2015 |
Mathieu Chartier <mathieuc@google.com> |
Revert "Revert "Add one LinearAlloc per ClassLoader""
Issue was fixed by:
https://android-review.googlesource.com/#/c/171945/
Bug: 22720414
This reverts commit 7de5dfe37f3cf24e1166412b589f6f67dcd1f1c0.
|
| 7de5dfe37f3cf24e1166412b589f6f67dcd1f1c0 |
|
22-Sep-2015 |
Nicolas Geoffray <ngeoffray@google.com> |
Revert "Add one LinearAlloc per ClassLoader"
Times out on 32bit target/host for 132-daemon-locks-shutdown test.
Bug: 22720414
This reverts commit 356412e2b7ba3fde164bc08a44fee0ddc19c54e1.
Change-Id: I5ab3a09e88a5ad8c306a27d2606ecbecc80b9326
|
| 356412e2b7ba3fde164bc08a44fee0ddc19c54e1 |
|
21-Sep-2015 |
Mathieu Chartier <mathieuc@google.com> |
Add one LinearAlloc per ClassLoader
Also added freeing linear alloc and class table when the
corresponding class loader is no longer reachable.
Bug: 22720414
Change-Id: Icb32c3a4c865f240e147bc87ed080a6b1d8a5795
|
| 1147b9bd68323c753ed1a0b6106b205fd640c820 |
|
15-Sep-2015 |
Mathieu Chartier <mathieuc@google.com> |
Use image pointer size for profile info
May fix some random crashes in dex2oat due to cross compilation.
Change-Id: I633652500e8c7dfec38044dffd07eb467973d82a
|
| 70c08d3c913ce2150cd620ea87b919f8eb5bd953 |
|
11-Sep-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Fix the DequeuePendingReference crash.
In DequeuePendingReference, acknowledge a black/white Reference object
in the queue if its referent was marked right after it's enqueued.
Bug: 12687968
Bug: 23896462
Change-Id: I33c802e04e1688a54a70ad3935628e3853c46e44
|
| fdbd13c7af91a042eda753e436eeebf0e1937250 |
|
03-Sep-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Some fixes for the CC collector.
- Remove a DCHECK in DisableMarkingCheckpoint, which caused
occasional (false) failures.
- Check the thread-local GetWeakRefAccessEnabled in boxed lambdas weak
access.
- Add missing BroadcastForNewAllocationRecords and
BroadcastForNewWeakBoxedLambdas. The lack of the former caused
occasional deadlocks in the ddmc test.
- Remove the 'ensure system weaks disallowed' calls, which weren't
useful and dead.
Bug: 12687968
Change-Id: I33850c8d12e6e1a3aed1c2bb18eba263cbab76e8
|
| 76f55b030d2517d434f227bee2363c3fb760e5c6 |
|
22-Aug-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Synchronize JNI critical calls with the CC collector thread flip.
JNI critical calls (like GetArrayElementsCritical) would need to block
for the whole GC run to finish if the CC collector GC is ongoing. This
CL changes it so that they don't need to block for the GC run, but
only for the duration of the thread flip operation, which is much
shorter. This is valid due to the to-space invariant.
Bug: 12687968
Bug: 19235243
Change-Id: I1b6b4ae4fa539ddc0ec50b10ae8c8709f2a12fe8
|
| 00370827646cc21cb370c3e7e93f9c0cff4c30c2 |
|
18-Aug-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Use thread-local is_gc_marking flags for the CC collector.
The currently global is_marking flag is used to check if the read
barrier slow path needs to be taken for GC roots access. Changing it
to a thread-local flag simplifies the fast path check and makes it
easier to do it in assembly code. It also solves the issue that we
need to avoid accessing the global flag during startup before the heap
or the collector object isn't allocated and initialized.
Bug: 12687968
Change-Id: Ibf0dca12f400bf3490188b12dfe96c7de30583e0
|
| 059ef3ddb2088f926ac452889e0953fdcd646a5e |
|
18-Aug-2015 |
Mathieu Chartier <mathieuc@google.com> |
Always visit object class from VisitReferences
We don't want to unload classes which have instances.
Slight increase in CMS GC time from ~6.5s to ~7.3s on
EvaluateAndApplyChanges.
Bug: 22720414
Change-Id: I467ff9c9d55163d2a90b999aef3bdd7b3f648bac
|
| 3887c468d731420e929e6ad3acf190d5431e94fc |
|
12-Aug-2015 |
Roland Levillain <rpl@google.com> |
Remove unnecessary `explicit` qualifiers on constructors.
Change-Id: Id12e392ad50f66a6e2251a68662b7959315dc567
|
| a4f6af9b1e6380b31674d7ac645b1732c846ac06 |
|
12-Aug-2015 |
Mathieu Chartier <mathieuc@google.com> |
Some heap cleanup
Bug: 19534862
Change-Id: Ia63f489d26ec8813a263ce877bdbbc8c4e8fe5f4
|
| da7c650022a974be10e2f00fa07d5109e3d8826f |
|
24-Jul-2015 |
Mathieu Chartier <mathieuc@google.com> |
Visit class native roots from VisitReferences
Visit class roots when we call Class::VisitReferences instead of in
the class linker. This makes it easier to implement class unloading
since unmarked classes won't have their roots visited by the class
linker.
Bug: 22181835
Change-Id: I63f31e5ebef7b2a0b764b3ba3cb038b3f561b379
|
| 90443477f9a0061581c420775ce3b7eeae7468bc |
|
17-Jul-2015 |
Mathieu Chartier <mathieuc@google.com> |
Move to newer clang annotations
Also enable -Wthread-safety-negative.
Changes:
Switch to capabilities and negative capabilities.
Future work:
Use capabilities to implement uninterruptible annotations to work
with AssertNoThreadSuspension.
Bug: 20072211
Change-Id: I42fcbe0300d98a831c89d1eff3ecd5a7e99ebf33
|
| 14d90579f013b374638b599361970557ed4b3f09 |
|
16-Jul-2015 |
Roland Levillain <rpl@google.com> |
Use (D)CHECK_ALIGNED more.
Change-Id: I9d740f6a88d01e028d4ddc3e4e62b0a73ea050af
|
| 8118781ebc9659f806716c451bdb3fe9b77ae32b |
|
15-Jul-2015 |
Mathieu Chartier <mathieuc@google.com> |
Address some GC comments
Follow-up from:
https://android-review.googlesource.com/#/c/159650/
Change-Id: Id14f29b4ce5b70b63fcb3e74f8503ae60a3ae444
|
| b19ccb1d88f0bff7371c9b72f265148677c18e95 |
|
15-Jul-2015 |
Mathieu Chartier <mathieuc@google.com> |
Use SuspendAllInternal for FlipThreadRoots
Fix FlipThreadRoots to wait until all the threads are suspended by
using SuspendAllInternal. Since running threads no longer hold the
mutator lock as shared held, doing an exclusive lock will not block
if the threads are not suspended. Also implemented MarkHeapReference
which is used to preserve soft references.
Fixes CC tests.
Change-Id: I4b059238f4249cf297e21ae918becd029fe26527
|
| 97509954404d031594b2ecbda607314d169d512e |
|
13-Jul-2015 |
Mathieu Chartier <mathieuc@google.com> |
Clean up GC callbacks to be virtual methods
Change-Id: Ia08034a4e5931c4fcb329c3bd3c4b1f301135735
|
| 0b71357fb52be9bb06d35396a3042b4381b01041 |
|
17-Jun-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Thread-local mark stacks for the CC collector.
Thread-local mark stacks are assigned to mutators where they push
references in read barriers to reduce the (CAS) synchronization cost
in a global mark stack/queue.
We step through three mark stack modes (thread-local, shared,
GC-exclusive) and use per-thread flags to disable/enable system weak
accesses (only for the CC collector) instead of the existing global
one to safely perform the marking phase. The reasons are 1)
thread-local mark stacks for mutators need to be revoked using a
checkpoint to avoid races (incorrectly leaving a reference on mark
stacks) when terminating marking, and 2) we can’t use a checkpoint
while system weak accesses are disabled (or a deadlock would
happen). More details are described in the code comments.
Performance improvements in Ritzperf EAAC: a ~2.8% improvement
(13290->12918) in run time and a ~23% improvement (51.6s->39.8s) in
the total GC time on N5.
Bug: 12687968
Change-Id: I5d234d7e48bf115cd773d38bdb62ad24ce9116c7
|
| 3cf225386e8129dcbe32b289279ecb87ec255318 |
|
10-Jul-2015 |
Mathieu Chartier <mathieuc@google.com> |
Clean up some includes
Change-Id: Ia03a3b54b235df38d5cfe096fef1aebe2b80eb29
|
| 41656de4b6440bcd1bea5fb785f0710153b2bc68 |
|
07-Jul-2015 |
Man Cao <manc@google.com> |
Fix potential bugs in allocation tracker
Add a missing visit allocation records call in concurrent copying collecter.
Handle null class objects if we support class unloading, and issues
with disallow and allow new allocation records.
Bug: 20037135
Change-Id: I59b7321c281e0d79a620501b2f43e36d2a576203
|
| 46ec520fc2d08e4bb602472406be8fd1ef7ca73c |
|
20-Jun-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Run an empty checkpoint before marking ends in the CC collector.
To avoid a race condition between the end of marking and a mutator
still in the middle of a read barrier.
Bug: 12687968
Bug: 21564728
Change-Id: I4962d895b4df89d2bcde97cbabdb98a14a19dd6b
|
| 3f64f25151780fdea3511be62b4fe50775f86541 |
|
13-Jun-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Print more diagnosis info on to-space invariant violation.
Pass the method/field (in GcRootSource) to the read barrier to print
more info when a to-space invariant violation is detected on a
method/field GC root access.
Refactor ConcurrentCopying::AssertToSpaceInvariant().
Bug: 12687968
Bug: 21564728
Change-Id: I3a5fde1f41969349b0fee6cd9217b948d5241a7c
|
| 3d21bdf8894e780d349c481e5c9e29fe1556051c |
|
22-Apr-2015 |
Mathieu Chartier <mathieuc@google.com> |
Move mirror::ArtMethod to native
Optimizing + quick tests are passing, devices boot.
TODO: Test and fix bugs in mips64.
Saves 16 bytes per most ArtMethod, 7.5MB reduction in system PSS.
Some of the savings are from removal of virtual methods and direct
methods object arrays.
Bug: 19264997
(cherry picked from commit e401d146407d61eeb99f8d6176b2ac13c4df1e33)
Change-Id: I622469a0cfa0e7082a2119f3d6a9491eb61e3f3d
Fix some ArtMethod related bugs
Added root visiting for runtime methods, not currently required
since the GcRoots in these methods are null.
Added missing GetInterfaceMethodIfProxy in GetMethodLine, fixes
--trace run-tests 005, 044.
Fixed optimizing compiler bug where we used a normal stack location
instead of double on ARM64, this fixes the debuggable tests.
TODO: Fix JDWP tests.
Bug: 19264997
Change-Id: I7c55f69c61d1b45351fd0dc7185ffe5efad82bd3
ART: Fix casts for 64-bit pointers on 32-bit compiler.
Bug: 19264997
Change-Id: Ief45cdd4bae5a43fc8bfdfa7cf744e2c57529457
Fix JDWP tests after ArtMethod change
Fixes Throwable::GetStackDepth for exception event detection after
internal stack trace representation change.
Adds missing ArtMethod::GetInterfaceMethodIfProxy call in case of
proxy method.
Bug: 19264997
Change-Id: I363e293796848c3ec491c963813f62d868da44d2
Fix accidental IMT and root marking regression
Was always using the conflict trampoline. Also included fix for
regression in GC time caused by extra roots. Most of the regression
was IMT.
Fixed bug in DumpGcPerformanceInfo where we would get SIGABRT due to
detached thread.
EvaluateAndApplyChanges:
From ~2500 -> ~1980
GC time: 8.2s -> 7.2s due to 1s less of MarkConcurrentRoots
Bug: 19264997
Change-Id: I4333e80a8268c2ed1284f87f25b9f113d4f2c7e0
Fix bogus image test assert
Previously we were comparing the size of the non moving space to
size of the image file.
Now we properly compare the size of the image space against the size
of the image file.
Bug: 19264997
Change-Id: I7359f1f73ae3df60c5147245935a24431c04808a
[MIPS64] Fix art_quick_invoke_stub argument offsets.
ArtMethod reference's size got bigger, so we need to move other args
and leave enough space for ArtMethod* and 'this' pointer.
This fixes mips64 boot.
Bug: 19264997
Change-Id: I47198d5f39a4caab30b3b77479d5eedaad5006ab
|
| e401d146407d61eeb99f8d6176b2ac13c4df1e33 |
|
22-Apr-2015 |
Mathieu Chartier <mathieuc@google.com> |
Move mirror::ArtMethod to native
Optimizing + quick tests are passing, devices boot.
TODO: Test and fix bugs in mips64.
Saves 16 bytes per most ArtMethod, 7.5MB reduction in system PSS.
Some of the savings are from removal of virtual methods and direct
methods object arrays.
Bug: 19264997
Change-Id: I622469a0cfa0e7082a2119f3d6a9491eb61e3f3d
|
| 60f63f53c01cb38ca18a815603282e802a6cf918 |
|
24-Apr-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Use the lock word bits for Baker-style read barrier.
This enables the standard object header to be used with the
Baker-style read barrier.
Bug: 19355854
Bug: 12687968
Change-Id: Ie552b6e1dfe30e96cb1d0895bd0dff25f9d7d015
|
| c785344b87221f5e4e6473e5b762e4e61fe65dcf |
|
27-Mar-2015 |
Mathieu Chartier <mathieuc@google.com> |
Move ArtField to native
Add linear alloc. Moved ArtField to be native object. Changed image
writer to put ArtFields after the mirror section.
Savings:
2MB on low ram devices
4MB on normal devices
Total PSS measurements before (normal N5, 95s after shell start):
Image size: 7729152 bytes
23112 kB: .NonMoving
23212 kB: .NonMoving
22868 kB: .NonMoving
23072 kB: .NonMoving
22836 kB: .NonMoving
19618 kB: .Zygote
19850 kB: .Zygote
19623 kB: .Zygote
19924 kB: .Zygote
19612 kB: .Zygote
Avg: 42745.4 kB
After:
Image size: 7462912 bytes
17440 kB: .NonMoving
16776 kB: .NonMoving
16804 kB: .NonMoving
17812 kB: .NonMoving
16820 kB: .NonMoving
18788 kB: .Zygote
18856 kB: .Zygote
19064 kB: .Zygote
18841 kB: .Zygote
18629 kB: .Zygote
3499 kB: .LinearAlloc
3408 kB: .LinearAlloc
3424 kB: .LinearAlloc
3600 kB: .LinearAlloc
3436 kB: .LinearAlloc
Avg: 39439.4 kB
No reflection performance changes.
Bug: 19264997
Bug: 17643507
Change-Id: I10c73a37913332080aeb978c7c94713bdfe4fe1c
|
| 4809d0a8a5fca85a67dd0588ead5dfbd0f1acf96 |
|
07-Apr-2015 |
Mathieu Chartier <mathieuc@google.com> |
Fix CC root visiting bug
Also some cleanup.
Change-Id: Ia3de8f2d409770be3619ec116e8b06ecd82338fe
|
| 720e71af6c5f92fbcddd0cff5b94d02366b74f89 |
|
07-Apr-2015 |
Mathieu Chartier <mathieuc@google.com> |
Add more logging for debugging possible deadlock
Change-Id: I4b2db54504d3ed8c2c33a110191488cab1fcb2d9
|
| 65b798ea10dd716c1bb3dda029f9bf255435af72 |
|
06-Apr-2015 |
Andreas Gampe <agampe@google.com> |
ART: Enable more Clang warnings
Change-Id: Ie6aba02f4223b1de02530e1515c63505f37e184c
|
| bb87e0f1a52de656bc77cb01cb887e51a0e5198b |
|
03-Apr-2015 |
Mathieu Chartier <mathieuc@google.com> |
Refactor and improve GC root handling
Changed GcRoot to use compressed references. Changed root visiting to
use virtual functions instead of function pointers. Changed root visting
interface to be an array of roots instead of a single root at a time.
Added buffered root marking helper to avoid dispatch overhead.
Root marking seems a bit faster on EvaluateAndApplyChanges due to batch
marking. Pause times unaffected.
Mips64 is untested but might work, maybe.
Before:
MarkConcurrentRoots: Sum: 67.678ms 99% C.I. 2us-664.999us Avg: 161.138us Max: 671us
After:
MarkConcurrentRoots: Sum: 54.806ms 99% C.I. 2us-499.986us Avg: 136.333us Max: 602us
Bug: 19264997
Change-Id: I0a71ebb5928f205b9b3f7945b25db6489d5657ca
|
| 4460a84be92b5a94ecfb5c650aef4945ab849c93 |
|
09-Mar-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Rosalloc thread local allocation path without a cas.
Speedup on N4:
MemAllocTest 3044 -> 2396 (~21% reduction)
BinaryTrees 4101 -> 2929 (~26% reduction)
Bug: 9986565
Change-Id: Ia1d1a37b9e001f903c3c056e8ec68fc8c623a78b
|
| 184c9dc3bfc500134fdb2fbea0a7fab290c0abb0 |
|
05-Mar-2015 |
Mathieu Chartier <mathieuc@google.com> |
Fix some incorrect IsCompiler instead of IsAotCompiler
Fixes jdwp related issues (DDMS) when JIT is enabled.
Bug: 19623297
Change-Id: I36139c70a97b529135febcf01b227e7ab9affacc
|
| e15ea086439b41a805d164d2beb07b4ba96aaa97 |
|
10-Feb-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Reserve bits in the lock word for read barriers.
This prepares for the CC collector to use the standard object header
model by storing the read barrier state in the lock word.
Bug: 19355854
Bug: 12687968
Change-Id: Ia7585662dd2cebf0479a3e74f734afe5059fb70f
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| dd9943d4466b052ef6c5ee5b32187adb48cbce74 |
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02-Feb-2015 |
Lei Li <lei.l.li@intel.com> |
ART: checkpoint mechanism optimization
GC thread and trim thread are both using checkpoint mechanism. GC thread
will request java threads to mark their thread roots by themselves. Trim
thread will request java threads to trim their jni local reference
tables by themselves.
The checkpint mechanism semantics is that the runnable java threads will
run checkpoint function itself at safepoint, and finally the java
threads and gc thread or trim thread is synchronized via barrier. If the
java threads are not runnable, gc thread or trim thread will suspend
them and then run their checkpoint functions one by one on behalf of
them. If all the java threads are not runnable, then gc thread or trim
thread will do all the work itself. In this case, there is no need
synchronization. This will save unnecessary synchronization and thread
state transitions.
Change-Id: If55940946cb3f8b1af42c7237c334f09c8ec7a9f
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| d25f84250700c35f006d5a1d295231af174c3734 |
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31-Jan-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
Clean up enums in RegionSpace.
Split enum RegionState into two enums, RegionState and
RegionType. Merge the latter with SubSpaceType.
Use RefToRegionUnlocked in RegionSpace::AddLiveBytes.
Turn some CHECKs into DCHECKs.
Improve the Ritz EAAC run time and the GC time by ~20%.
Bug: 12687968
Change-Id: Icdb8ab3e9ec2a1eefc8c9a2e4bb19befcf2562a6
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| cb535da36915f9d10bec3880b46f1de1f7a69f22 |
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23-Jan-2015 |
Mathieu Chartier <mathieuc@google.com> |
Change AtomicStack to use StackReference
Previously used Object*, using StackReference saves memory on 64 bit
devices.
Bug: 12935052
Bug: 17643507
Change-Id: I035878690054eeeb24d655a900b8f26c837703ff
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| 2cd334ae2d4287216523882f0d298cf3901b7ab1 |
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09-Jan-2015 |
Hiroshi Yamauchi <yamauchi@google.com> |
More of the concurrent copying collector.
Bug: 12687968
Change-Id: I62f70274d47df6d6cab714df95c518b750ce3105
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| d5307ec41c8344be0c32273ec4f574064036187d |
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28-Mar-2014 |
Hiroshi Yamauchi <yamauchi@google.com> |
An empty collector skeleton for a read barrier-based collector.
Bug: 12687968
Change-Id: Ic2a3a7b9943ca64e7f60f4d6ed552a316ea4a6f3
|