Enable large object space for zygote.
We now enable the large object space before the zygote fork.
This reduces the size of the zygote and removes the need for
excessive explicit GCs during phone booting.
Changed the card set mod union table to support forgetting cards.
If a card has no non null references which are in another space
then it is removed from the set.
Added logging of the zygote size when you do a SIGQUIT.
Dalvik PSS is the same or slightly lower (1-3%).
Zygote space size:
Before: 15MB
After: 8MB (+ some large objects).
TODO: Combine remembered sets and mod union tables into a single
interface.
Bug: 16398684
Change-Id: Ie48cdf35004a0a37eedb1ccc1bf214b1fa9e0cca
diff --git a/runtime/gc/heap.h b/runtime/gc/heap.h
index d5b49d8..ed93ad9 100644
--- a/runtime/gc/heap.h
+++ b/runtime/gc/heap.h
@@ -79,6 +79,7 @@
namespace space {
class AllocSpace;
class BumpPointerSpace;
+ class ContinuousMemMapAllocSpace;
class DiscontinuousSpace;
class DlMallocSpace;
class ImageSpace;
@@ -87,7 +88,7 @@
class RosAllocSpace;
class Space;
class SpaceTest;
- class ContinuousMemMapAllocSpace;
+ class ZygoteSpace;
} // namespace space
class AgeCardVisitor {
@@ -599,6 +600,10 @@
return &reference_processor_;
}
+ bool HasZygoteSpace() const {
+ return zygote_space_ != nullptr;
+ }
+
private:
// Compact source space to target space.
void Compact(space::ContinuousMemMapAllocSpace* target_space,
@@ -849,8 +854,9 @@
// Lock which guards zygote space creation.
Mutex zygote_creation_lock_;
- // If we have a zygote space.
- bool have_zygote_space_;
+ // Non-null iff we have a zygote space. Doesn't contain the large objects allocated before
+ // zygote space creation.
+ space::ZygoteSpace* zygote_space_;
// Minimum allocation size of large object.
size_t large_object_threshold_;