src/hotspot/share/memory/metaspace/metaspaceCommon.hpp

rev 50068 : [mq]: metaspace-split

*** 23,40 ****
   */
  
  #ifndef SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP_
  #define SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP_
  
  #include "utilities/globalDefinitions.hpp"
  
- 
  class outputStream;
  
  namespace metaspace {
  namespace internals {
  
  // Print a size, in words, scaled.
  void print_scaled_words(outputStream* st, size_t word_size, size_t scale = 0, int width = -1);
  
  // Convenience helper: prints a size value and a percentage.
  void print_scaled_words_and_percentage(outputStream* st, size_t word_size, size_t compare_word_size, size_t scale = 0, int width = -1);
--- 23,49 ----
   */
  
  #ifndef SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP_
  #define SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP_
  
+ #include "utilities/debug.hpp"
  #include "utilities/globalDefinitions.hpp"
  
  class outputStream;
  
  namespace metaspace {
  namespace internals {
  
+ enum ChunkSizes {    // in words.
+   ClassSpecializedChunk = 128,
+   SpecializedChunk = 128,
+   ClassSmallChunk = 256,
+   SmallChunk = 512,
+   ClassMediumChunk = 4 * K,
+   MediumChunk = 8 * K
+ };
+ 
  // Print a size, in words, scaled.
  void print_scaled_words(outputStream* st, size_t word_size, size_t scale = 0, int width = -1);
  
  // Convenience helper: prints a size value and a percentage.
  void print_scaled_words_and_percentage(outputStream* st, size_t word_size, size_t compare_word_size, size_t scale = 0, int width = -1);
*** 48,56 ****
--- 57,131 ----
  
  // Prints a percentage value. Values smaller than 1% but not 0 are displayed as "<1%", values
  // larger than 99% but not 100% are displayed as ">100%".
  void print_percentage(outputStream* st, size_t total, size_t part);
  
+ 
+ #define assert_is_aligned(value, alignment)                  \
+   assert(is_aligned((value), (alignment)),                   \
+          SIZE_FORMAT_HEX " is not aligned to "               \
+          SIZE_FORMAT, (size_t)(uintptr_t)value, (alignment))
+ 
+ // Internal statistics.
+ #ifdef ASSERT
+ struct  internal_statistics_t {
+   // Number of allocations.
+   uintx num_allocs;
+   // Number of times a ClassLoaderMetaspace was born...
+   uintx num_metaspace_births;
+   // ... and died.
+   uintx num_metaspace_deaths;
+   // Number of times VirtualSpaceListNodes were created...
+   uintx num_vsnodes_created;
+   // ... and purged.
+   uintx num_vsnodes_purged;
+   // Number of times we expanded the committed section of the space.
+   uintx num_committed_space_expanded;
+   // Number of deallocations
+   uintx num_deallocs;
+   // Number of deallocations triggered from outside ("real" deallocations).
+   uintx num_external_deallocs;
+   // Number of times an allocation was satisfied from deallocated blocks.
+   uintx num_allocs_from_deallocated_blocks;
+ };
+ extern internal_statistics_t g_internal_statistics;
+ #endif
+ 
+ // ChunkIndex defines the type of chunk.
+ // Chunk types differ by size: specialized < small < medium, chunks
+ // larger than medium are humongous chunks of varying size.
+ enum ChunkIndex {
+   ZeroIndex = 0,
+   SpecializedIndex = ZeroIndex,
+   SmallIndex = SpecializedIndex + 1,
+   MediumIndex = SmallIndex + 1,
+   HumongousIndex = MediumIndex + 1,
+   NumberOfFreeLists = 3,
+   NumberOfInUseLists = 4
+ };
+ 
+ // Utility functions.
+ size_t get_size_for_nonhumongous_chunktype(ChunkIndex chunk_type, bool is_class);
+ ChunkIndex get_chunk_type_by_size(size_t size, bool is_class);
+ 
+ ChunkIndex next_chunk_index(ChunkIndex i);
+ ChunkIndex prev_chunk_index(ChunkIndex i);
+ // Returns a descriptive name for a chunk type.
+ const char* chunk_size_name(ChunkIndex index);
+ 
+ // Verify chunk type.
+ inline bool is_valid_chunktype(ChunkIndex index) {
+   return index == SpecializedIndex || index == SmallIndex ||
+          index == MediumIndex || index == HumongousIndex;
+ }
+ 
+ inline bool is_valid_nonhumongous_chunktype(ChunkIndex index) {
+   return is_valid_chunktype(index) && index != HumongousIndex;
+ }
+ 
+ 
+ 
+ 
  } // namespace internals
  } // namespace metaspace
  
  #endif /* SHARE_MEMORY_METASPACE_METASPACESTATISTICS_HPP_ */