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diff src/share/vm/gc_implementation/g1/g1_globals.hpp @ 890:6cb8e9df7174

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6819077: G1: first GC thread coming late into the GC. Summary: The first worker thread is delayed when entering the GC because it clears the card count table that is used in identifying hot cards. Replace the card count table with a dynamically sized evicting hash table that includes an epoch based counter. Reviewed-by: iveresov, tonyp
author johnc
date Tue, 04 Aug 2009 16:00:17 -0700
parents 83b687ce3090
children e1fdf4fd34dc
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/g1/g1_globals.hpp	Mon Aug 03 12:59:30 2009 -0700
+++ b/src/share/vm/gc_implementation/g1/g1_globals.hpp	Tue Aug 04 16:00:17 2009 -0700
@@ -187,10 +187,6 @@
   develop(intx, G1ConcRSLogCacheSize, 10,                                   \
           "Log base 2 of the length of conc RS hot-card cache.")            \
                                                                             \
-  develop(bool, G1ConcRSCountTraversals, false,                             \
-          "If true, gather data about the number of times CR traverses "    \
-          "cards ")                                                         \
-                                                                            \
   develop(intx, G1ConcRSHotCardLimit, 4,                                    \
           "The threshold that defines (>=) a hot card.")                    \
                                                                             \
@@ -264,6 +260,10 @@
                                                                             \
   product(uintx, G1ParallelRSetThreads, 0,                                  \
           "If non-0 is the number of parallel rem set update threads, "     \
-          "otherwise the value is determined ergonomically.")
+          "otherwise the value is determined ergonomically.")               \
+                                                                            \
+  develop(intx, G1CardCountCacheExpandThreshold, 16,                        \
+          "Expand the card count cache if the number of collisions for "    \
+          "a particular entry exceeds this value.")
 
 G1_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG)