view src/share/vm/services/nmtCommon.hpp @ 9038:4b8584c24ff4

8215934: G1 Old Gen MemoryPool CollectionUsage.used values don't reflect mixed GC results Summary: Memory pools can now be optional collection participants, e.g., G1 Old Gen in an incremental collection. Reviewed-by: tschatzl, jcbeyler, andrew
author phh
date Mon, 28 Jan 2019 17:51:10 +0000
parents 833b0f92429a
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 * published by the Free Software Foundation.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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#include "memory/allocation.hpp"
#include "utilities/globalDefinitions.hpp"

#define CALC_OBJ_SIZE_IN_TYPE(obj, type) (align_size_up_(sizeof(obj), sizeof(type))/sizeof(type))

// Data type for memory counters
#ifdef _LP64
  typedef jlong    MemoryCounterType;
  typedef jint     MemoryCounterType;

// Native memory tracking level
enum NMT_TrackingLevel {
  NMT_unknown = 0xFF,
  NMT_off     = 0x00,
  NMT_minimal = 0x01,
  NMT_summary = 0x02,
  NMT_detail  = 0x03

// Number of stack frames to capture. This is a
// build time decision.
const int NMT_TrackingStackDepth = 4;

// A few common utilities for native memory tracking
class NMTUtil : AllStatic {
  // Map memory type to index
  static inline int flag_to_index(MEMFLAGS flag) {
    return (flag & 0xff);

  // Map memory type to human readable name
  static const char* flag_to_name(MEMFLAGS flag) {
    return _memory_type_names[flag_to_index(flag)];

  // Map an index to memory type
  static MEMFLAGS index_to_flag(int index) {
    return (MEMFLAGS)index;

  // Memory size scale
  static const char* scale_name(size_t scale);
  static size_t scale_from_name(const char* scale);

  // Translate memory size in specified scale
  static size_t amount_in_scale(size_t amount, size_t scale) {
    return (amount + scale / 2) / scale;
  static const char* _memory_type_names[mt_number_of_types];