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diff src/share/vm/gc_implementation/g1/g1RemSet.cpp @ 638:2a5da27ccae9

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6816154: G1: introduce flags to enable/disable RSet updating and scanning Summary: Introduces two flags, -XX:-/+G1EnableParallelRSetUpdating and -XX:-/+G1EnableParallelRSetScanning, to turn on/off the "band aid" fix that serializes RSet updating / scanning during GCs. Reviewed-by: iveresov
author tonyp
date Mon, 16 Mar 2009 10:52:44 -0400
parents 25e146966e7c
children ba50942c8138
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/g1/g1RemSet.cpp	Mon Mar 16 08:01:32 2009 -0700
+++ b/src/share/vm/gc_implementation/g1/g1RemSet.cpp	Mon Mar 16 10:52:44 2009 -0400
@@ -502,14 +502,17 @@
   }
 
   if (ParallelGCThreads > 0) {
-    // This is a temporary change to serialize the update and scanning
-    // of remembered sets. There are some race conditions when this is
-    // done in parallel and they are causing failures. When we resolve
-    // said race conditions, we'll revert back to parallel remembered
-    // set updating and scanning. See CRs 6677707 and 6677708.
-    if (worker_i == 0) {
+    // The two flags below were introduced temporarily to serialize
+    // the updating and scanning of remembered sets. There are some
+    // race conditions when these two operations are done in parallel
+    // and they are causing failures. When we resolve said race
+    // conditions, we'll revert back to parallel remembered set
+    // updating and scanning. See CRs 6677707 and 6677708.
+    if (G1EnableParallelRSetUpdating || (worker_i == 0)) {
       updateRS(worker_i);
       scanNewRefsRS(oc, worker_i);
+    }
+    if (G1EnableParallelRSetScanning || (worker_i == 0)) {
       scanRS(oc, worker_i);
     }
   } else {