commit 2d2621a1463d2f3f03fa73503fa42e43657cdcfc
author Mathieu Chartier <mathieuc@google.com> Thu Oct 23 16:48:06 2014 -0700
committer Mathieu Chartier <mathieuc@google.com> Mon Oct 27 16:49:43 2014 -0700
tree 1f7cf393693d72db5c186f99b04ac511958c6418
parent ac293277b69882105810fabd6c53f55de58823fe

Optimize method linking

Added more inlining, removed imt array allocation and replaced it
with a handle scope. Removed some un-necessary handle scopes.

Added logic to base interface method tables from the superclass so
that we dont need to reconstruct for every interface (large win).

Facebook launch Dalvik KK MR2:
TotalTime: 3165
TotalTime: 3652
TotalTime: 3143
TotalTime: 3298
TotalTime: 3212
TotalTime: 3211

Facebook launch TOT before:
WaitTime: 3702
WaitTime: 3616
WaitTime: 3616
WaitTime: 3687
WaitTime: 3742
WaitTime: 3767

After optimizations:
WaitTime: 2903
WaitTime: 2953
WaitTime: 2918
WaitTime: 2940
WaitTime: 2879
WaitTime: 2792

LinkInterfaceMethods no longer one of the hottest methods, new list:
4.73% art::ClassLinker::LinkVirtualMethods(art::Thread*, art::Handle<art::mirror::Class>)
3.07% art::DexFile::FindClassDef(char const*) const
2.94% art::mirror::Class::FindDeclaredStaticField(art::mirror::DexCache const*, unsigned int)
2.90% art::DexFile::FindStringId(char const*) const

Bug: 18054905
Bug: 16828525

(cherry picked from commit 1fb463e42cf1d67595cff66d19c0f99e3046f4c4)

Change-Id: I27cc70178fd3655fbe5a3178887fcba189d21321

runtime/gc/heap.h

diff --git a/runtime/gc/heap.h b/runtime/gc/heap.h
index ff1e38b..7b891a6 100644
--- a/runtime/gc/heap.h
+++ b/runtime/gc/heap.h
@@ -382,18 +382,18 @@
 
   // Must be called if a field of an Object in the heap changes, and before any GC safe-point.
   // The call is not needed if NULL is stored in the field.
-  void WriteBarrierField(const mirror::Object* dst, MemberOffset /*offset*/,
-                         const mirror::Object* /*new_value*/) {
+  ALWAYS_INLINE void WriteBarrierField(const mirror::Object* dst, MemberOffset /*offset*/,
+                                       const mirror::Object* /*new_value*/) {
     card_table_->MarkCard(dst);
   }
 
   // Write barrier for array operations that update many field positions
-  void WriteBarrierArray(const mirror::Object* dst, int /*start_offset*/,
-                         size_t /*length TODO: element_count or byte_count?*/) {
+  ALWAYS_INLINE void WriteBarrierArray(const mirror::Object* dst, int /*start_offset*/,
+                                       size_t /*length TODO: element_count or byte_count?*/) {
     card_table_->MarkCard(dst);
   }
 
-  void WriteBarrierEveryFieldOf(const mirror::Object* obj) {
+  ALWAYS_INLINE void WriteBarrierEveryFieldOf(const mirror::Object* obj) {
     card_table_->MarkCard(obj);
   }