| 8016bdee7ca1a066221a5d2fe5e60890de950a5b |
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16-Jun-2016 |
Mathieu Chartier <mathieuc@google.com> |
Use collector specific helper classes
Changed to use inner classes. Also changed some visitors to lambdas.
Bug: 29413717
Bug: 19534862
(cherry picked from commit a07f55913824ab4215a9a4f827fa9c043c0d44d9)
Change-Id: I631c8bfe5f795eda4623c5bb4f357f2dd12358e2
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| 18fd5a09fa727edf2eaf3f3e44b8465c270f2c32 |
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04-Mar-2016 |
Mathieu Chartier <mathieuc@google.com> |
Use MarkIfNotInToSpace for SemiSpace::MarkObject
SemiSpace::MarkObject is called from ModUnionScanImageRootVisitor
which. These roots may be visited multiple times by the GC. One
example is the allocation stack traces and a class visiting the same
ArtMethod twice.
Bug: 27435111
(cherry picked from commit 9a9aee662ebde18bed2a8e263c921df4f529b27b)
Change-Id: I2387a6efaed79d37f2ee47725637af29e78e3548
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| 9a9aee662ebde18bed2a8e263c921df4f529b27b |
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04-Mar-2016 |
Mathieu Chartier <mathieuc@google.com> |
Use MarkIfNotInToSpace for SemiSpace::MarkObject
SemiSpace::MarkObject is called from ModUnionScanImageRootVisitor
which. These roots may be visited multiple times by the GC. One
example is the allocation stack traces and a class visiting the same
ArtMethod twice.
Bug: 27435111
Change-Id: I721b8bcf7fe43f4c351d902c2f3422d3bb585295
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| 763a31ed7a2bfad22a9cb07f5301a71c0f97ca49 |
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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
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| c62110668b7ceac450c3abcf279476139bf4e566 |
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25-Jul-2015 |
Mathieu Chartier <mathieuc@google.com> |
Fix gcstress tests
We may visit the native roots multiple times (e.g. temp classes).
This used to not be handled by the SS GC but is now handle by
MarkObjectIfNotInToSpace.
Change-Id: I18226e20b36ace41c155ba4c3f54eac2244f524c
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| 14d90579f013b374638b599361970557ed4b3f09 |
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16-Jul-2015 |
Roland Levillain <rpl@google.com> |
Use (D)CHECK_ALIGNED more.
Change-Id: I9d740f6a88d01e028d4ddc3e4e62b0a73ea050af
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| 60f63f53c01cb38ca18a815603282e802a6cf918 |
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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
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| b76cac637691c29daa9c44e493b5bc26346ed116 |
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23-Jul-2014 |
Mathieu Chartier <mathieuc@google.com> |
Revert "Revert "Disable adding main and non moving spaces to immune region in GSS""
This reverts commit f85c2fb317399ab540854cd7551ac47690366543.
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| f85c2fb317399ab540854cd7551ac47690366543 |
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22-Jul-2014 |
Mathieu Chartier <mathieuc@google.com> |
Revert "Disable adding main and non moving spaces to immune region in GSS"
Bug: 16399257
This reverts commit be0562fb14e6754ee932b8d9c97e2a6df3a91119.
Change-Id: I29e07a8fa1e972990e5bf1ddf8c9a3538ea5f9cf
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| be0562fb14e6754ee932b8d9c97e2a6df3a91119 |
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14-Jul-2014 |
Mathieu Chartier <mathieuc@google.com> |
Disable adding main and non moving spaces to immune region in GSS
Disabled adding the main and non moving space to the immune region.
This will enable us to recycle bump pointer spaces for malloc space
-> malloc space compaction as well as collector transitions.
Also added logic for falling back to the non moving space, we may
copy objects there.
Refactored mod union table logic into MarkReachableObjects.
No measurable performance benefit or regression.
Bug: 14059466
Bug: 16291259
(cherry picked from commit 4c13a3ff475f206c4d0a86ee2595c45392fd942f)
Change-Id: I858b4fbddca888e164052ad247565a0bdbea68b5
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| 4c13a3ff475f206c4d0a86ee2595c45392fd942f |
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14-Jul-2014 |
Mathieu Chartier <mathieuc@google.com> |
Disable adding main and non moving spaces to immune region in GSS
Disabled adding the main and non moving space to the immune region.
This will enable us to recycle bump pointer spaces for malloc space
-> malloc space compaction as well as collector transitions.
Also added logic for falling back to the non moving space, we may
copy objects there.
Refactored mod union table logic into MarkReachableObjects.
No measurable performance benefit or regression.
Bug: 14059466
Bug: 16291259
Change-Id: If663d9fdbde943b988173b7f6ac844e5f78a0327
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| eb8167a4f4d27fce0530f6724ab8032610cd146b |
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08-May-2014 |
Mathieu Chartier <mathieuc@google.com> |
Add Handle/HandleScope and delete SirtRef.
Delete SirtRef and replaced it with Handle. Handles are value types
which wrap around StackReference*.
Renamed StackIndirectReferenceTable to HandleScope.
Added a scoped handle wrapper which wraps around an Object** and
restores it in its destructor.
Renamed Handle::get -> Get.
Bug: 8473721
Change-Id: Idbfebd4f35af629f0f43931b7c5184b334822c7a
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| bbd695c71e0bf518f582e84524e1cdeb3de3896c |
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16-Apr-2014 |
Mathieu Chartier <mathieuc@google.com> |
Replace ObjectSet with LargeObjectBitmap.
Speeds up large object marking since large objects no longer required
a lock. Changed the GCs to use the heap bitmap for marking objects
which aren't in the fast path. This eliminates the need for a
MarkLargeObject function.
Maps before (10 GC iterations):
Mean partial time: 180ms
Mean sticky time: 151ms
Maps after:
Mean partial time: 161ms
Mean sticky time: 101ms
Note: the GC durations are long due to recent ergonomic changes and
because the fast bulk free hasn't yet been enabled. Over 50% of the
GC time is spent in RosAllocSpace::FreeList.
Bug: 13571028
Change-Id: Id8f94718aeaa13052672ccbae1e8edf77d653f62
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| 4d7f61d44a732cfbc8573e5d93364983fd746888 |
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17-Apr-2014 |
Mathieu Chartier <mathieuc@google.com> |
Use non volatile lock words in semispace collector.
GSS FormulaEvaluationActions.EvaluateAndApplyChanges:
Before GC time: 9.1s
After GC time: 7.98s
Fixed timing logger errors.
Change-Id: I4193c6ccbbbe7a7220dfaabbf3472a5dcebae616
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| a8e8f9c0a8e259a807d7b99a148d14104c24209d |
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09-Apr-2014 |
Mathieu Chartier <mathieuc@google.com> |
Refactor space bitmap to support different alignments.
Required for:
Using space bitmaps instead of std::set in mod union table +
remembered set.
Using a bitmap instead of set for large object marking.
Bug: 13571028
Change-Id: Id024e9563d4ca4278f79607cdb2f81895121b113
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| 624468cd401cc1ac0dd70c746301e0788a597759 |
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01-Apr-2014 |
Hiroshi Yamauchi <yamauchi@google.com> |
Make the support code for read barriers a bit more general.
Add an option for Baker in addition to Brooks.
Bug: 12687968
Change-Id: I8a31db817ff6686c72951b6534f588228e270b11
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| 3b05e9ba874449dbff65b01b8781001f7d93eea6 |
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25-Mar-2014 |
Mathieu Chartier <mathieuc@google.com> |
Add missing debugger root visiting.
Bug: 13634574
Change-Id: I2a76f6c43f1d0ad1922f06deb40a71ff651129fd
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| 590fee9e8972f872301c2d16a575d579ee564bee |
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13-Sep-2013 |
Mathieu Chartier <mathieuc@google.com> |
Compacting collector.
The compacting collector is currently similar to semispace. It works by
copying objects back and forth between two bump pointer spaces. There
are types of objects which are "non-movable" due to current runtime
limitations. These are Classes, Methods, and Fields.
Bump pointer spaces are a new type of continuous alloc space which have
no lock in the allocation code path. When you allocate from these it uses
atomic operations to increase an index. Traversing the objects in the bump
pointer space relies on Object::SizeOf matching the allocated size exactly.
Runtime changes:
JNI::GetArrayElements returns copies objects if you attempt to get the
backing data of a movable array. For GetArrayElementsCritical, we return
direct backing storage for any types of arrays, but temporarily disable
the GC until the critical region is completed.
Added a new runtime call called VisitObjects, this is used in place of
the old pattern which was flushing the allocation stack and walking
the bitmaps.
Changed image writer to be compaction safe and use object monitor word
for forwarding addresses.
Added a bunch of added SIRTs to ClassLinker, MethodLinker, etc..
TODO: Enable switching allocators, compacting on background, etc..
Bug: 8981901
Change-Id: I3c886fd322a6eef2b99388d19a765042ec26ab99
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