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/rosalloc_space.h b/runtime/gc/space/rosalloc_space.h
index a156738..2934af8 100644
--- a/runtime/gc/space/rosalloc_space.h
+++ b/runtime/gc/space/rosalloc_space.h
@@ -52,6 +52,11 @@
size_t* usable_size) OVERRIDE {
return AllocNonvirtual(self, num_bytes, bytes_allocated, usable_size);
}
+ mirror::Object* AllocThreadUnsafe(Thread* self, size_t num_bytes, size_t* bytes_allocated,
+ size_t* usable_size)
+ OVERRIDE EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_) {
+ return AllocNonvirtualThreadUnsafe(self, num_bytes, bytes_allocated, usable_size);
+ }
size_t AllocationSize(mirror::Object* obj, size_t* usable_size) OVERRIDE {
return AllocationSizeNonvirtual(obj, usable_size);
}
@@ -65,6 +70,11 @@
// RosAlloc zeroes memory internally.
return AllocCommon(self, num_bytes, bytes_allocated, usable_size);
}
+ mirror::Object* AllocNonvirtualThreadUnsafe(Thread* self, size_t num_bytes,
+ size_t* bytes_allocated, size_t* usable_size) {
+ // RosAlloc zeroes memory internally. Pass in false for thread unsafe.
+ return AllocCommon<false>(self, num_bytes, bytes_allocated, usable_size);
+ }
// TODO: NO_THREAD_SAFETY_ANALYSIS because SizeOf() requires that mutator_lock is held.
size_t AllocationSizeNonvirtual(mirror::Object* obj, size_t* usable_size)
@@ -116,6 +126,7 @@
size_t starting_size, size_t initial_size, bool low_memory_mode);
private:
+ template<bool kThreadSafe = true>
mirror::Object* AllocCommon(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size);