src/hotspot/share/runtime/thread.hpp

rev 48920 : [backport] Use PLAB for evacuations instead of TLAB

*** 89,98 ****
--- 89,102 ----
  
  DEBUG_ONLY(class ResourceMark;)
  
  class WorkerThread;
  
+ #ifdef INCLUDE_ALL_GCS
+ class PLAB;
+ #endif
+ 
  // Class hierarchy
  // - Thread
  //   - NamedThread
  //     - VMThread
  //     - ConcurrentGCThread
*** 319,334 ****
    friend class GCLocker;
  
    volatile void* _polling_page;                 // Thread local polling page
  
    ThreadLocalAllocBuffer _tlab;                 // Thread-local eden
!   ThreadLocalAllocBuffer _gclab;                // Thread-local allocation buffer for GC (e.g. evacuation)
    jlong _allocated_bytes;                       // Cumulative number of bytes allocated on
                                                  // the Java heap
-   jlong _allocated_bytes_gclab;                 // Cumulative number of bytes allocated on
-                                                 // the Java heap, in GCLABs
- 
    mutable TRACE_DATA _trace_data;               // Thread-local data for tracing
  
    ThreadExt _ext;
  
    int   _vm_operation_started_count;            // VM_Operation support
--- 323,335 ----
    friend class GCLocker;
  
    volatile void* _polling_page;                 // Thread local polling page
  
    ThreadLocalAllocBuffer _tlab;                 // Thread-local eden
!   PLAB*                  _gclab;                // Thread-local allocation buffer for GC (e.g. evacuation)
    jlong _allocated_bytes;                       // Cumulative number of bytes allocated on
                                                  // the Java heap
    mutable TRACE_DATA _trace_data;               // Thread-local data for tracing
  
    ThreadExt _ext;
  
    int   _vm_operation_started_count;            // VM_Operation support
*** 506,532 ****
  
    // Thread-Local Allocation Buffer (TLAB) support
    ThreadLocalAllocBuffer& tlab()                 { return _tlab; }
    void initialize_tlab() {
      if (UseTLAB) {
!       tlab().initialize(false);
!       gclab().initialize(true);
      }
    }
  
    // Thread-Local GC Allocation Buffer (GCLAB) support
!   ThreadLocalAllocBuffer& gclab()                { return _gclab; }
! 
    jlong allocated_bytes()               { return _allocated_bytes; }
    void set_allocated_bytes(jlong value) { _allocated_bytes = value; }
    void incr_allocated_bytes(jlong size) { _allocated_bytes += size; }
    inline jlong cooked_allocated_bytes();
  
-   jlong allocated_bytes_gclab()                { return _allocated_bytes_gclab; }
-   void set_allocated_bytes_gclab(jlong value)  { _allocated_bytes_gclab = value; }
-   void incr_allocated_bytes_gclab(jlong size)  { _allocated_bytes_gclab += size; }
- 
    TRACE_DEFINE_THREAD_TRACE_DATA_OFFSET;
    TRACE_DATA* trace_data() const        { return &_trace_data; }
    bool is_trace_suspend()               { return (_suspend_flags & _trace_flag) != 0; }
  
    const ThreadExt& ext() const          { return _ext; }
--- 507,528 ----
  
    // Thread-Local Allocation Buffer (TLAB) support
    ThreadLocalAllocBuffer& tlab()                 { return _tlab; }
    void initialize_tlab() {
      if (UseTLAB) {
!       tlab().initialize();
      }
    }
  
    // Thread-Local GC Allocation Buffer (GCLAB) support
!   PLAB* gclab()                                  { return _gclab; }
!   void set_gclab(PLAB* gclab)                    { _gclab = gclab; }
    jlong allocated_bytes()               { return _allocated_bytes; }
    void set_allocated_bytes(jlong value) { _allocated_bytes = value; }
    void incr_allocated_bytes(jlong size) { _allocated_bytes += size; }
    inline jlong cooked_allocated_bytes();
  
    TRACE_DEFINE_THREAD_TRACE_DATA_OFFSET;
    TRACE_DATA* trace_data() const        { return &_trace_data; }
    bool is_trace_suspend()               { return (_suspend_flags & _trace_flag) != 0; }
  
    const ThreadExt& ext() const          { return _ext; }
*** 708,721 ****
    TLAB_FIELD_OFFSET(fast_refill_waste)
    TLAB_FIELD_OFFSET(slow_allocations)
  
  #undef TLAB_FIELD_OFFSET
  
-   static ByteSize gclab_start_offset()         { return byte_offset_of(Thread, _gclab) + ThreadLocalAllocBuffer::start_offset(); }
-   static ByteSize gclab_top_offset()           { return byte_offset_of(Thread, _gclab) + ThreadLocalAllocBuffer::top_offset(); }
-   static ByteSize gclab_end_offset()           { return byte_offset_of(Thread, _gclab) + ThreadLocalAllocBuffer::end_offset(); }
- 
    static ByteSize allocated_bytes_offset()       { return byte_offset_of(Thread, _allocated_bytes); }
  
   public:
    volatile intptr_t _Stalled;
    volatile int _TypeTag;
--- 704,713 ----