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
diff --git a/runtime/gc/space/dlmalloc_space.cc b/runtime/gc/space/dlmalloc_space.cc
index 60f566c..be88b33 100644
--- a/runtime/gc/space/dlmalloc_space.cc
+++ b/runtime/gc/space/dlmalloc_space.cc
@@ -36,15 +36,19 @@
template class ValgrindMallocSpace<DlMallocSpace, void*>;
DlMallocSpace::DlMallocSpace(const std::string& name, MemMap* mem_map, void* mspace, byte* begin,
- byte* end, byte* limit, size_t growth_limit)
- : MallocSpace(name, mem_map, begin, end, limit, growth_limit),
- mspace_(mspace), mspace_for_alloc_(mspace) {
+ byte* end, byte* limit, size_t growth_limit,
+ bool can_move_objects, size_t starting_size,
+ size_t initial_size)
+ : MallocSpace(name, mem_map, begin, end, limit, growth_limit, true, can_move_objects,
+ starting_size, initial_size),
+ mspace_(mspace) {
CHECK(mspace != NULL);
}
DlMallocSpace* DlMallocSpace::CreateFromMemMap(MemMap* mem_map, const std::string& name,
size_t starting_size, size_t initial_size,
- size_t growth_limit, size_t capacity) {
+ size_t growth_limit, size_t capacity,
+ bool can_move_objects) {
DCHECK(mem_map != nullptr);
void* mspace = CreateMspace(mem_map->Begin(), starting_size, initial_size);
if (mspace == nullptr) {
@@ -62,14 +66,17 @@
byte* begin = mem_map->Begin();
if (Runtime::Current()->RunningOnValgrind()) {
return new ValgrindMallocSpace<DlMallocSpace, void*>(
- name, mem_map, mspace, begin, end, begin + capacity, growth_limit, initial_size);
+ name, mem_map, mspace, begin, end, begin + capacity, growth_limit, initial_size,
+ can_move_objects, starting_size);
} else {
- return new DlMallocSpace(name, mem_map, mspace, begin, end, begin + capacity, growth_limit);
+ return new DlMallocSpace(name, mem_map, mspace, begin, end, begin + capacity, growth_limit,
+ can_move_objects, starting_size, initial_size);
}
}
-DlMallocSpace* DlMallocSpace::Create(const std::string& name, size_t initial_size, size_t growth_limit,
- size_t capacity, byte* requested_begin) {
+DlMallocSpace* DlMallocSpace::Create(const std::string& name, size_t initial_size,
+ size_t growth_limit, size_t capacity, byte* requested_begin,
+ bool can_move_objects) {
uint64_t start_time = 0;
if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) {
start_time = NanoTime();
@@ -93,7 +100,7 @@
return nullptr;
}
DlMallocSpace* space = CreateFromMemMap(mem_map, name, starting_size, initial_size,
- growth_limit, capacity);
+ growth_limit, capacity, can_move_objects);
// We start out with only the initial size possibly containing objects.
if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) {
LOG(INFO) << "DlMallocSpace::Create exiting (" << PrettyDuration(NanoTime() - start_time)
@@ -143,8 +150,10 @@
MallocSpace* DlMallocSpace::CreateInstance(const std::string& name, MemMap* mem_map,
void* allocator, byte* begin, byte* end,
- byte* limit, size_t growth_limit) {
- return new DlMallocSpace(name, mem_map, allocator, begin, end, limit, growth_limit);
+ byte* limit, size_t growth_limit,
+ bool can_move_objects) {
+ return new DlMallocSpace(name, mem_map, allocator, begin, end, limit, growth_limit,
+ can_move_objects, starting_size_, initial_size_);
}
size_t DlMallocSpace::Free(Thread* self, mirror::Object* ptr) {
@@ -280,13 +289,13 @@
}
void DlMallocSpace::Clear() {
+ size_t footprint_limit = GetFootprintLimit();
madvise(GetMemMap()->Begin(), GetMemMap()->Size(), MADV_DONTNEED);
- GetLiveBitmap()->Clear();
- GetMarkBitmap()->Clear();
-}
-
-void DlMallocSpace::Reset() {
- // TODO: Delete and create new mspace here.
+ live_bitmap_->Clear();
+ mark_bitmap_->Clear();
+ end_ = Begin() + starting_size_;
+ mspace_ = CreateMspace(mem_map_->Begin(), starting_size_, initial_size_);
+ SetFootprintLimit(footprint_limit);
}
#ifndef NDEBUG