26 #define SHARE_VM_GC_G1_G1STRINGDEDUPTHREAD_HPP
  27 
  28 #include "gc/g1/g1StringDedupStat.hpp"
  29 #include "gc/shared/concurrentGCThread.hpp"
  30 
  31 //
  32 // The deduplication thread is where the actual deduplication occurs. It waits for
  33 // deduplication candidates to appear on the deduplication queue, removes them from
  34 // the queue and tries to deduplicate them. It uses the deduplication hashtable to
  35 // find identical, already existing, character arrays on the heap. The thread runs
  36 // concurrently with the Java application but participates in safepoints to allow
  37 // the GC to adjust and unlink oops from the deduplication queue and table.
  38 //
  39 class G1StringDedupThread: public ConcurrentGCThread {
  40 private:
  41   static G1StringDedupThread* _thread;
  42 
  43   G1StringDedupThread();
  44   ~G1StringDedupThread();
  45 
  46   void print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat);
  47 
  48 public:
  49   static void create();
  50   static void stop();
  51 
  52   static G1StringDedupThread* thread();
  53 
  54   virtual void run();
  55 
  56   void deduplicate_shared_strings(G1StringDedupStat& stat);
  57 };
  58 
  59 #endif // SHARE_VM_GC_G1_G1STRINGDEDUPTHREAD_HPP

  26 #define SHARE_VM_GC_G1_G1STRINGDEDUPTHREAD_HPP
  27 
  28 #include "gc/g1/g1StringDedupStat.hpp"
  29 #include "gc/shared/concurrentGCThread.hpp"
  30 
  31 //
  32 // The deduplication thread is where the actual deduplication occurs. It waits for
  33 // deduplication candidates to appear on the deduplication queue, removes them from
  34 // the queue and tries to deduplicate them. It uses the deduplication hashtable to
  35 // find identical, already existing, character arrays on the heap. The thread runs
  36 // concurrently with the Java application but participates in safepoints to allow
  37 // the GC to adjust and unlink oops from the deduplication queue and table.
  38 //
  39 class G1StringDedupThread: public ConcurrentGCThread {
  40 private:
  41   static G1StringDedupThread* _thread;
  42 
  43   G1StringDedupThread();
  44   ~G1StringDedupThread();
  45 
  46   void print(const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat);
  47 
  48 public:
  49   static void create();
  50   static void stop();
  51 
  52   static G1StringDedupThread* thread();
  53 
  54   virtual void run();
  55 
  56   void deduplicate_shared_strings(G1StringDedupStat& stat);
  57 };
  58 
  59 #endif // SHARE_VM_GC_G1_G1STRINGDEDUPTHREAD_HPP