Mercurial > hg > truffle

diff src/share/vm/opto/runtime.cpp @ 1166:7b0e9cba0307

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6896647: card marks can be deferred too long Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future. Reviewed-by: never, johnc
author ysr
date Wed, 13 Jan 2010 15:26:39 -0800
parents 4ce7240d622c
children 87684f1a88b5 6deeaebad47a
line wrap: on
line diff
--- a/src/share/vm/opto/runtime.cpp	Tue Jan 12 14:56:46 2010 -0800
+++ b/src/share/vm/opto/runtime.cpp	Wed Jan 13 15:26:39 2010 -0800
@@ -143,7 +143,7 @@
 // We failed the fast-path allocation.  Now we need to do a scavenge or GC
 // and try allocation again.
 
-void OptoRuntime::maybe_defer_card_mark(JavaThread* thread) {
+void OptoRuntime::new_store_pre_barrier(JavaThread* thread) {
   // After any safepoint, just before going back to compiled code,
   // we inform the GC that we will be doing initializing writes to
   // this object in the future without emitting card-marks, so
@@ -156,7 +156,7 @@
   assert(Universe::heap()->can_elide_tlab_store_barriers(),
          "compiler must check this first");
   // GC may decide to give back a safer copy of new_obj.
-  new_obj = Universe::heap()->defer_store_barrier(thread, new_obj);
+  new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
   thread->set_vm_result(new_obj);
 }
 
@@ -200,7 +200,7 @@
 
   if (GraphKit::use_ReduceInitialCardMarks()) {
     // inform GC that we won't do card marks for initializing writes.
-    maybe_defer_card_mark(thread);
+    new_store_pre_barrier(thread);
   }
 JRT_END
 
@@ -239,7 +239,7 @@
 
   if (GraphKit::use_ReduceInitialCardMarks()) {
     // inform GC that we won't do card marks for initializing writes.
-    maybe_defer_card_mark(thread);
+    new_store_pre_barrier(thread);
   }
 JRT_END