| 654dd48e2230e16bfaa225decce72b52642e2f78 |
|
09-Jul-2014 |
Hiroshi Yamauchi <yamauchi@google.com> |
Improve the OOME fragmentation message.
Change-Id: I390d3622f8d572ec7e34ea6dff9e1e0936e81ac1
|
| 31f441464c0c8f840aba37e236ad133f30308d70 |
|
08-Apr-2014 |
Mathieu Chartier <mathieuc@google.com> |
Clean-up heap spaces.
We now use the CMS collector instead of the semispace collector when
the phone is booting. We still perform compaction during the zygote
space creation. This reduces time spent in GC by ~2s during boot
and doesn't affect zygote space size.
Changed the space creation logic to create the temp space when a
background transition occurs.
Added a flag to each space which is true if you are allowed to
move objects that are within this space.
Removed SwapSemiSpaces call from the semi space collector, it is now
the job of the caller to do this with threads suspended. This
simplifies the logic in the zygote compaction / heap transition code
since these do not copy from one semispace to another.
Added Space::Clear to RosAllocSpace and DlMallocSpace. This greatly
simplifies the code used for collector transitions.
Time spent in GC creating zygote space:
Before: 3.4s, After: 1.28s
No change in zygote space size.
Bug: 13878055
Change-Id: I700348ab7d5bf3aa537c0cd70c0fed09aa4b0623
|
| 26d69ffc0ebc98fbc5f316d8cd3ee6ba5b2001ac |
|
27-Feb-2014 |
Hiroshi Yamauchi <yamauchi@google.com> |
Decrease lock uses in RosAlloc::BulkFree().
Read rosalloc page map entries without a lock.
Disabled for now.
This change speeds up Ritz MemAllocTest by ~25% on host and reduces
the GC sweep time, but somehow slows it down by ~5% on N4, which is
why it's disabled for now. TODO: look into the slowdown on N4 more.
Bug: 8262791
Bug: 11790317
Change-Id: I936bbee9cfbd389e70d6343503bf0923865d2a2c
|
| 15d3402bbf8265eb1165694da2e4117eb128f3bc |
|
27-Feb-2014 |
Mathieu Chartier <mathieuc@google.com> |
Add custom SIGSEGV handler to help find heap corruption.
The new signal handler prints heap diagnostics when you get a SIGSEGV.
Added a fault message member in runtime which is modifiable by
Runtime::SetFaultMessage. When you get a SIGSEGV it will print out
whatever is stored in this string as well as the normal information.
This is useful for debugging heap corruption since it lets you see
which threads were in which methods when the last GC occured.
Added some smarter object dumping logic when the faulting address is
in the heap.
Bug: 12934910
Change-Id: Ia72be2c39f70ad711cbd746d66fad2b617d5d29f
|
| 6fac447555dc94a935b78198479cce645c837b89 |
|
26-Feb-2014 |
Ian Rogers <irogers@google.com> |
Make allocations report usable size.
Work-in-progress to allow arrays to fill usable size. Bug: 13028925.
Use C++11's override keyword on GCC >= 2.7 to ensure that we override GC and
allocator methods.
Move initial mirror::Class set up into a Functor so that all allocated objects
have non-zero sizes. Use this property to assert that all objects are never
larger than their usable size.
Other bits of GC related clean-up, missing initialization, missing use of
const, hot methods in .cc files, "unimplemented" functions that fail at
runtime in header files, reducing header file includes, move valgrind's space
into its own files, reduce number of array allocation routines.
Change-Id: Id5760041a2d7f94dcaf17ec760f6095ec75dadaa
|
| ef7d42fca18c16fbaf103822ad16f23246e2905d |
|
06-Jan-2014 |
Ian Rogers <irogers@google.com> |
Object model changes to support 64bit.
Modify mirror objects so that references between them use an ObjectReference
value type rather than an Object* so that functionality to compress larger
references can be captured in the ObjectRefererence implementation.
ObjectReferences are 32bit and all other aspects of object layout remain as
they are currently.
Expand fields in objects holding pointers so they can hold 64bit pointers. Its
expected the size of these will come down by improving where we hold compiler
meta-data.
Stub out x86_64 architecture specific runtime implementation.
Modify OutputStream so that reads and writes are of unsigned quantities.
Make the use of portable or quick code more explicit.
Templatize AtomicInteger to support more than just int32_t as a type.
Add missing, and fix issues relating to, missing annotalysis information on the
mutator lock.
Refactor and share implementations for array copy between System and uses
elsewhere in the runtime.
Fix numerous 64bit build issues.
Change-Id: I1a5694c251a42c9eff71084dfdd4b51fff716822
|
| a1602f28c0e3127ad511712d4b08db89737ae901 |
|
14-Jan-2014 |
Mathieu Chartier <mathieuc@google.com> |
Add zygote space as its own space type.
Helps prevent errors caused from doing invalid operations on the
old alloc space.
Removed some duplicated code in mark_sweep.cc and semi_space.cc.
Change-Id: I67a772cab30d698744c918aad581053f282a4a99
|
| e6da9af8dfe0a3e3fbc2be700554f6478380e7b9 |
|
16-Dec-2013 |
Mathieu Chartier <mathieuc@google.com> |
Background compaction support.
When the process state changes to a state which does not perceives
jank, we copy from the main free-list backed allocation space to
the bump pointer space and enable the semispace allocator.
When we transition back to foreground, we copy back to a free-list
backed space.
Create a seperate non-moving space which only holds non-movable
objects. This enables us to quickly wipe the current alloc space
(DlMalloc / RosAlloc) when we transition to background.
Added multiple alloc space support to the sticky mark sweep GC.
Added a -XX:BackgroundGC option which lets you specify
which GC to use for background apps. Passing in
-XX:BackgroundGC=SS makes the heap compact the heap for apps which
do not perceive jank.
Results:
Simple background foreground test:
0. Reboot phone, unlock.
1. Open browser, click on home.
2. Open calculator, click on home.
3. Open calendar, click on home.
4. Open camera, click on home.
5. Open clock, click on home.
6. adb shell dumpsys meminfo
PSS Normal ART:
Sample 1:
88468 kB: Dalvik
3188 kB: Dalvik Other
Sample 2:
81125 kB: Dalvik
3080 kB: Dalvik Other
PSS Dalvik:
Total PSS by category:
Sample 1:
81033 kB: Dalvik
27787 kB: Dalvik Other
Sample 2:
81901 kB: Dalvik
28869 kB: Dalvik Other
PSS ART + Background Compaction:
Sample 1:
71014 kB: Dalvik
1412 kB: Dalvik Other
Sample 2:
73859 kB: Dalvik
1400 kB: Dalvik Other
Dalvik other reduction can be explained by less deep allocation
stacks / less live bitmaps / less dirty cards.
TODO improvements: Recycle mem-maps which are unused in the current
state. Not hardcode 64 MB capacity of non movable space (avoid
returning linear alloc nightmares). Figure out ways to deal with low
virtual address memory problems.
Bug: 8981901
Change-Id: Ib235d03f45548ffc08a06b8ae57bf5bada49d6f3
|
| e48780b8278240dec2d3164512f7d3317a5495c1 |
|
18-Dec-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
Remove some unnecessary code from dlmalloc_space/rosalloc_space.
Removed GetTotalBytesAllocated(), GetTotalObjectsAllocated(), and
InternalAllocationSize().
No performance improvement observed.
Change-Id: Ie20433a0fd328fc7f61d4afd54d18fbdc4aa4a17
|
| 573f7d2d68e1838a0485e6b40d90c967526e00c2 |
|
17-Dec-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
Fix an array copy benchmark regression.
Add different page release modes to rosalloc.
Bug: 12064551
Change-Id: Ib837bbd1a2757741a4e2743e0a1272bf46a30252
|
| 4ce1f00cc74867188347e463f4a5ecb9fe55cde5 |
|
18-Nov-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
Fix a per-process dumpsys meminfo crash.
In the InvalidateAllocator() function, DlMallocSpace and RosAllocSpace
both null out the underlying allocator pointer at the zygote fork time
so that new allocations won't accidentally happen in the zygote space
after a zygote fork. However, nulling out the only allocator pointer
would cause crashes in non-allocation uses such as GetFootprint() in
this particular crash. Fix this by creating a second pointer just for
the allocation purpose that gets nulled upon a InvalidateAllocator()
call while the original pointer keeps pointing to the allocator.
Change-Id: Ie751d9380db39baace9e25712a3824eec9a9969a
|
| e5eedcb4a634246d1f912992853441f715d705cc |
|
18-Nov-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
Fix cpplint errors.
Change-Id: I21f7423ebe69a77d456b0d318de73448489d2df4
|
| cf58d4adf461eb9b8e84baa8019054c88cd8acc6 |
|
26-Sep-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
A custom 'runs-of-slots' memory allocator.
Bug: 9986565
Change-Id: I0eb73b9458752113f519483616536d219d5f798b
|
| 590fee9e8972f872301c2d16a575d579ee564bee |
|
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
|
| be031fff278799984166ec866c2dd202447e0f23 |
|
09-Oct-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
Remove four counter increments out of the allocation path.
- This change removes the four allocation counters (the number of
bytes allocated, the number of objects allocated, the number of bytes
allocated ever, the number of objects allocated ever) from the
dlmalloc space allocation path. Now those counter values are computed
on the fly based on a combination of the two new counters that are
incremented by the GC side (the number of bytes freed ever and the
number of objects freed ever) and mspace_inspect_all() calls.
- This results in a 1-2% speedup (though with some noise) in Ritz
MemAllocTest on Nexus 4.
Bug: 9986565
Change-Id: Id9a8e05a745ac1e5ea7a2b5fd9319814a9d4af13
|
| 0f72e4136aecaf6976fdb55916bbd7b6d5c9c77b |
|
07-Sep-2013 |
Mathieu Chartier <mathieuc@google.com> |
Improve heap verification.
Re-enabled checking the allocation stack for heap verification.
Added tracking of recent frees in DlMallocSpace if debug spaces is
enabled. This is useful when you have heap corruption caused by a
live object referencing a recently freed object.
Added various other sanity checks in the GC.
Bug: 10626133
Change-Id: I5ada11966336ae9a06615b16f4b933f05b5d0c32
|
| eb5710eba75bf338da56386ca29039df9d5134cb |
|
26-Jul-2013 |
Mathieu Chartier <mathieuc@google.com> |
New free list large object space.
More memory efficient, uses a std::set instead of multiset. Each
large object allocation has sizeof(size_t) * 2 bytes of overhead
without taking into account the std::set overhead. If debug is
enabled, then objects are mprotected as they are freed.
Added a large object test to space test.
Change-Id: I3e714e1afbed49208a4a7e60f9ef7d701a56801b
|
| 50b2928501fe489c108472e7648ec98cdca62e10 |
|
30-Jul-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
Improve the allocation speed.
- Improves the Ritz MemAllocTest benchmark result by ~500 ms (or ~5%) on Nexus 4.
- Move the memset() call that zeroes the allocated memory out of the lock region.
- De-virtualize/Inline the allocation call chains into Heap::AllocObject().
- Turn Heap::measure_allocation_time_ into a static const variable.
- Surround the VerifyObject() call with kIsDebugBuild.
Bug: 9986565
Change-Id: Ib70b6d051a80ec329788b30256565561f031da2a
|
| 834b394ee759ed31c5371d8093d7cd8cd90014a8 |
|
31-Jul-2013 |
Brian Carlstrom <bdc@google.com> |
Merge remote-tracking branch 'goog/dalvik-dev' into merge-art-to-dalvik-dev
Change-Id: I323e9e8c29c3e39d50d9aba93121b26266c52a46
|
| 09b07a96094086e205948717666025909a75163b |
|
15-Jul-2013 |
Hiroshi Yamauchi <yamauchi@google.com> |
Show size/alloc/free per Dalvik heap space in dumpsys
Add the heap size/alloc/free stats to the Dalvik heap space breakdown section in dumpsys meminfo.
Also, now the zygote heap has a distict ashmem region name.
Bug: 9532137
Bug: 8266259
Change-Id: Ieeb02f5f5ebf7ffe35d4b55ad81d46989af2827b
|
| fc0e3219edc9a5bf81b166e82fd5db2796eb6a0d |
|
17-Jul-2013 |
Brian Carlstrom <bdc@google.com> |
Fix multiple inclusion guards to match new pathnames
Change-Id: Id7735be1d75bc315733b1773fba45c1deb8ace43
|
| 7940e44f4517de5e2634a7e07d58d0fb26160513 |
|
12-Jul-2013 |
Brian Carlstrom <bdc@google.com> |
Create separate Android.mk for main build targets
The runtime, compiler, dex2oat, and oatdump now are in seperate trees
to prevent dependency creep. They can now be individually built
without rebuilding the rest of the art projects. dalvikvm and jdwpspy
were already this way. Builds in the art directory should behave as
before, building everything including tests.
Change-Id: Ic6b1151e5ed0f823c3dd301afd2b13eb2d8feb81
|