src/hotspot/share/runtime/threadHeapSampler.hpp

rev 52084 : 8211980: Remove ThreadHeapSampler enable/disable/enabled methods
Summary:
Reviewed-by:

*** 28,51 ****
  
  #include "memory/allocation.hpp"
  
  class ThreadHeapSampler {
   private:
    size_t _bytes_until_sample;
    // Cheap random number generator
    static uint64_t _rnd;
  
    void pick_next_geometric_sample();
    void pick_next_sample(size_t overflowed_bytes = 0);
-   static int _enabled;
-   static int _sampling_interval;
  
    // Used for assertion mode to determine if there is a path to a TLAB slow path
    // without a collector present.
    size_t _collectors_present;
  
!   static void init_log_table();
  
   public:
    ThreadHeapSampler() : _bytes_until_sample(0) {
      _rnd = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(this));
      if (_rnd == 0) {
--- 28,59 ----
  
  #include "memory/allocation.hpp"
  
  class ThreadHeapSampler {
   private:
+   // Statics for the fast log
+   static const int FastLogNumBits = 10;
+   static const int FastLogMask = (1 << FastLogNumBits) - 1;
+ 
    size_t _bytes_until_sample;
    // Cheap random number generator
    static uint64_t _rnd;
+   static bool _log_table_initialized;
+ 
+   static double _log_table[1<<FastLogNumBits];  // Constant
+   static int _sampling_interval;
  
    void pick_next_geometric_sample();
    void pick_next_sample(size_t overflowed_bytes = 0);
  
    // Used for assertion mode to determine if there is a path to a TLAB slow path
    // without a collector present.
    size_t _collectors_present;
  
!   static double fast_log2(const double& d);
!   static bool init_log_table();
!   uint64_t next_random(uint64_t rnd);
  
   public:
    ThreadHeapSampler() : _bytes_until_sample(0) {
      _rnd = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(this));
      if (_rnd == 0) {
*** 58,71 ****
    size_t bytes_until_sample()                    { return _bytes_until_sample;   }
    void set_bytes_until_sample(size_t bytes)      { _bytes_until_sample = bytes;  }
  
    void check_for_sampling(oop obj, size_t size_in_bytes, size_t bytes_allocated_before);
  
-   static int enabled();
-   static void enable();
-   static void disable();
- 
    static void set_sampling_interval(int sampling_interval);
    static int get_sampling_interval();
  };
  
  #endif // SHARE_RUNTIME_THREADHEAPSAMPLER_HPP
--- 66,75 ----