Add thread unsafe allocation methods to spaces.
Used by SS/GSS collectors since these run with mutators suspended and
only allocate from a single thread. Added AllocThreadUnsafe to
BumpPointerSpace and RosAllocSpace. Added AllocThreadUnsafe which uses
current runs as thread local runs for a thread unsafe allocation.
Added code to revoke current runs which are the same idx as thread
local runs.
Changed:
The number of thread local runs in each thread is now the the number
of thread local runs in RosAlloc instead of the number of size
brackets.
Total GC time / time on EvaluateAndApplyChanges.
TLAB SS:
Before: 36.7s / 7254
After: 16.1s / 4837
TLAB GSS:
Before: 6.9s / 3973
After: 5.7s / 3778
Bug: 8981901
Change-Id: Id1d264ade3799f431bf7ebbdcca6146aefbeb632
diff --git a/runtime/gc/space/bump_pointer_space.h b/runtime/gc/space/bump_pointer_space.h
index e52a9a3..9e61f30 100644
--- a/runtime/gc/space/bump_pointer_space.h
+++ b/runtime/gc/space/bump_pointer_space.h
@@ -48,6 +48,11 @@
// Allocate num_bytes, returns nullptr if the space is full.
mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size) OVERRIDE;
+ // Thread-unsafe allocation for when mutators are suspended, used by the semispace collector.
+ mirror::Object* AllocThreadUnsafe(Thread* self, size_t num_bytes, size_t* bytes_allocated,
+ size_t* usable_size)
+ OVERRIDE EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_);
+
mirror::Object* AllocNonvirtual(size_t num_bytes);
mirror::Object* AllocNonvirtualWithoutAccounting(size_t num_bytes);