Set unswept free bytes for concurent sweeper.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index bdd4785e3e729368ab1c6bf297e48457f9b5c6b4..f767727a812bca2e305dc63abe5565151991c8cd 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -522,6 +522,8 @@ void MarkCompactCollector::WaitUntilSweepingCompleted() {
     StealMemoryFromSweeperThreads(heap()->paged_space(OLD_DATA_SPACE));
     StealMemoryFromSweeperThreads(heap()->paged_space(OLD_POINTER_SPACE));
     heap()->FreeQueuedChunks();
+    heap()->paged_space(OLD_DATA_SPACE)->ResetUnsweptFreeBytes();
+    heap()->paged_space(OLD_POINTER_SPACE)->ResetUnsweptFreeBytes();

[Michael Starzinger, 2013/02/28 13:09:52]

This requires rebasing, but I agree that WaitUntilSweepingCompleted() is the
right place for the reset.

[Hannes Payer (out of office), 2013/02/28 14:42:34]

Done.

   }
 }
 
@@ -3779,6 +3781,7 @@ void MarkCompactCollector::SweepSpace(PagedSpace* space, SweeperType sweeper) {
                  reinterpret_cast<intptr_t>(p));
         }
         p->set_parallel_sweeping(1);
+        space->IncreaseUnsweptFreeBytes(p);
         break;
       }
       case PRECISE: {