src/share/vm/runtime/synchronizer.hpp

rev 13206 : 8180932: Parallelize safepoint cleanup
Summary: Provide infrastructure to do safepoint cleanup tasks using parallel worker threads
Reviewed-by: dholmes, rehn, dcubed, thartmann

*** 30,39 ****
--- 30,45 ----
  #include "runtime/handles.hpp"
  #include "runtime/perfData.hpp"
  
  class ObjectMonitor;
  
+ struct DeflateMonitorCounters {
+   int nInuse;          // currently associated with objects
+   int nInCirculation;  // extant
+   int nScavenged;      // reclaimed
+ };
+ 
  class ObjectSynchronizer : AllStatic {
    friend class VMStructs;
   public:
    typedef enum {
      owner_self,
*** 125,135 ****
    static void monitors_iterate(MonitorClosure* m);
  
    // GC: we current use aggressive monitor deflation policy
    // Basically we deflate all monitors that are not busy.
    // An adaptive profile-based deflation policy could be used if needed
!   static void deflate_idle_monitors();
    // For a given monitor list: global or per-thread, deflate idle monitors
    static int deflate_monitor_list(ObjectMonitor** listheadp,
                                    ObjectMonitor** freeHeadp,
                                    ObjectMonitor** freeTailp);
    static bool deflate_monitor(ObjectMonitor* mid, oop obj,
--- 131,145 ----
    static void monitors_iterate(MonitorClosure* m);
  
    // GC: we current use aggressive monitor deflation policy
    // Basically we deflate all monitors that are not busy.
    // An adaptive profile-based deflation policy could be used if needed
!   static void deflate_idle_monitors(DeflateMonitorCounters* counters);
!   static void deflate_thread_local_monitors(Thread* thread, DeflateMonitorCounters* counters);
!   static void prepare_deflate_idle_monitors(DeflateMonitorCounters* counters);
!   static void finish_deflate_idle_monitors(DeflateMonitorCounters* counters);
! 
    // For a given monitor list: global or per-thread, deflate idle monitors
    static int deflate_monitor_list(ObjectMonitor** listheadp,
                                    ObjectMonitor** freeHeadp,
                                    ObjectMonitor** freeTailp);
    static bool deflate_monitor(ObjectMonitor* mid, oop obj,