23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/shared/genCollectedHeap.hpp"
  27 #include "gc/shared/threadLocalAllocBuffer.inline.hpp"
  28 #include "memory/resourceArea.hpp"
  29 #include "memory/universe.inline.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/thread.inline.hpp"
  32 #include "utilities/copy.hpp"
  33 
  34 // Thread-Local Edens support
  35 
  36 // static member initialization
  37 size_t           ThreadLocalAllocBuffer::_max_size       = 0;
  38 unsigned         ThreadLocalAllocBuffer::_target_refills = 0;
  39 GlobalTLABStats* ThreadLocalAllocBuffer::_global_stats   = NULL;
  40 
  41 void ThreadLocalAllocBuffer::clear_before_allocation() {
  42   _slow_refill_waste += (unsigned)remaining();



  43   make_parsable(true);   // also retire the TLAB
  44 }
  45 
  46 void ThreadLocalAllocBuffer::accumulate_statistics_before_gc() {
  47   global_stats()->initialize();
  48 
  49   for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) {
  50     thread->tlab().accumulate_statistics();
  51     thread->tlab().initialize_statistics();
  52   }
  53 
  54   // Publish new stats if some allocation occurred.
  55   if (global_stats()->allocation() != 0) {
  56     global_stats()->publish();
  57     if (PrintTLAB) {
  58       global_stats()->print();
  59     }
  60   }
  61 }
  62 

  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/shared/genCollectedHeap.hpp"
  27 #include "gc/shared/threadLocalAllocBuffer.inline.hpp"
  28 #include "memory/resourceArea.hpp"
  29 #include "memory/universe.inline.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/thread.inline.hpp"
  32 #include "utilities/copy.hpp"
  33 
  34 // Thread-Local Edens support
  35 
  36 // static member initialization
  37 size_t           ThreadLocalAllocBuffer::_max_size       = 0;
  38 unsigned         ThreadLocalAllocBuffer::_target_refills = 0;
  39 GlobalTLABStats* ThreadLocalAllocBuffer::_global_stats   = NULL;
  40 
  41 void ThreadLocalAllocBuffer::clear_before_allocation() {
  42   _slow_refill_waste += (unsigned)remaining();
  43   // In debug mode we expect the storage above top to be uninitialized
  44   // or filled with a padding object.
  45   assert(!ZapUnusedHeapArea || VM_Version::reserve_for_allocation_prefetch() > 0 || top() == NULL || *(intptr_t*)top() != 0, "overzeroing detected");
  46   make_parsable(true);   // also retire the TLAB
  47 }
  48 
  49 void ThreadLocalAllocBuffer::accumulate_statistics_before_gc() {
  50   global_stats()->initialize();
  51 
  52   for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) {
  53     thread->tlab().accumulate_statistics();
  54     thread->tlab().initialize_statistics();
  55   }
  56 
  57   // Publish new stats if some allocation occurred.
  58   if (global_stats()->allocation() != 0) {
  59     global_stats()->publish();
  60     if (PrintTLAB) {
  61       global_stats()->print();
  62     }
  63   }
  64 }
  65