src/hotspot/share/gc/shared/taskqueue.hpp

rev 53303 : 8248214: Add paddings for TaskQueueSuper to reduce false-sharing cache contention
Summary: Add paddings for TaskQueueSuper to reduce false-sharing cache contention
Reviewed-by: robm

@@ -147,10 +147,12 @@
       size_t _data;
       fields _fields;
     };
   };
 
+  // Add paddings to reduce false-sharing cache contention between _bottom and _age
+  DEFINE_PAD_MINUS_SIZE(0, DEFAULT_CACHE_LINE_SIZE, sizeof(_bottom));
   volatile Age _age;
 
   // These both operate mod N.
   static uint increment_index(uint ind) {
     return (ind + 1) & MOD_N_MASK;