src/share/vm/gc/shared/cardTableRS.cpp

@@ -100,13 +100,14 @@
     set_cur_youngergen_card_val(youngergen_card);
   }
 }
 
 void CardTableRS::younger_refs_iterate(Generation* g,
-                                       OopsInGenClosure* blk) {
+                                       OopsInGenClosure* blk,
+                                       uint n_threads) {
   _last_cur_val_in_gen[g->level()+1] = cur_youngergen_card_val();
-  g->younger_refs_iterate(blk);
+  g->younger_refs_iterate(blk, n_threads);
 }
 
 inline bool ClearNoncleanCardWrapper::clear_card(jbyte* entry) {
   if (_is_par) {
     return clear_card_parallel(entry);

@@ -162,19 +163,12 @@
   *entry = CardTableRS::clean_card_val();
   return true;
 }
 
 ClearNoncleanCardWrapper::ClearNoncleanCardWrapper(
-  DirtyCardToOopClosure* dirty_card_closure, CardTableRS* ct) :
-    _dirty_card_closure(dirty_card_closure), _ct(ct) {
-    // Cannot yet substitute active_workers for n_par_threads
-    // in the case where parallelism is being turned off by
-    // setting n_par_threads to 0.
-    _is_par = (GenCollectedHeap::heap()->n_par_threads() > 0);
-    assert(!_is_par ||
-           (GenCollectedHeap::heap()->n_par_threads() ==
-            GenCollectedHeap::heap()->workers()->active_workers()), "Mismatch");
+  DirtyCardToOopClosure* dirty_card_closure, CardTableRS* ct, bool is_par) :
+    _dirty_card_closure(dirty_card_closure), _ct(ct), _is_par(is_par) {
 }
 
 bool ClearNoncleanCardWrapper::is_word_aligned(jbyte* entry) {
   return (((intptr_t)entry) & (BytesPerWord-1)) == 0;
 }

@@ -270,11 +264,12 @@
     }
   } while (true);
 }
 
 void CardTableRS::younger_refs_in_space_iterate(Space* sp,
-                                                OopsInGenClosure* cl) {
+                                                OopsInGenClosure* cl,
+                                                uint n_threads) {
   const MemRegion urasm = sp->used_region_at_save_marks();
 #ifdef ASSERT
   // Convert the assertion check to a warning if we are running
   // CMS+ParNew until related bug is fixed.
   MemRegion ur    = sp->used_region();

@@ -299,11 +294,11 @@
       warning("CMS+ParNew: Flickering used_region_at_save_marks()!!");
     }
     ShouldNotReachHere();
   }
 #endif
-  _ct_bs->non_clean_card_iterate_possibly_parallel(sp, urasm, cl, this);
+  _ct_bs->non_clean_card_iterate_possibly_parallel(sp, urasm, cl, this, n_threads);
 }
 
 void CardTableRS::clear_into_younger(Generation* old_gen) {
   assert(old_gen->level() == 1, "Should only be called for the old generation");
   // The card tables for the youngest gen need never be cleared.