commit c11d9b8870de5f860b13c84003ade7b3f3125a52
author Mathieu Chartier <mathieuc@google.com> Thu Sep 19 10:01:59 2013 -0700
committer Mathieu Chartier <mathieuc@google.com> Fri Sep 20 10:36:49 2013 -0700
tree 89b0250d35a950774f98fa1abfa9cc296c9d85db
parent 261d3cda32b28782d894be0244e617f78182ee3b

Re-enable concurrent system weak sweeping.

Enabled by disallowing new system weaks during the pause and
re-allowing it after the system weaks have been swept. Reduces
GC pause by ~1ms.

Fixes pause regression caused by fix for
Bug: 10626133

Change-Id: If49d33e7ef19cb728ed3cef5187acfa53b9b05d8

runtime/intern_table.h

diff --git a/runtime/intern_table.h b/runtime/intern_table.h
index 07615dc..e68af90 100644
--- a/runtime/intern_table.h
+++ b/runtime/intern_table.h
@@ -66,6 +66,9 @@
 
   void DumpForSigQuit(std::ostream& os) const;
 
+  void DisallowNewInterns() EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_);
+  void AllowNewInterns() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
  private:
   typedef std::multimap<int32_t, mirror::String*> Table;
 
@@ -79,6 +82,8 @@
 
   mutable Mutex intern_table_lock_;
   bool is_dirty_ GUARDED_BY(intern_table_lock_);
+  bool allow_new_interns_ GUARDED_BY(intern_table_lock_);
+  ConditionVariable new_intern_condition_ GUARDED_BY(intern_table_lock_);
   Table strong_interns_ GUARDED_BY(intern_table_lock_);
   Table weak_interns_ GUARDED_BY(intern_table_lock_);
 };