src/hotspot/share/runtime/safepoint.hpp
author coleenp
Fri, 23 Feb 2018 14:13:06 -0500
changeset 49061 a6b6a428c915
parent 47881 0ce0ac68ace7
child 49169 af8578e25d17
permissions -rw-r--r--
8198635: Remove unused safepoint message functions and ShowSafepointMsgs Reviewed-by: eosterlund, gtriantafill
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
49061
a6b6a428c915 8198635: Remove unused safepoint message functions and ShowSafepointMsgs
coleenp
parents: 47881
diff changeset
     2
 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     4
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load
duke
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load
duke
parents:
diff changeset
     7
 * published by the Free Software Foundation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     8
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
489c9b5090e2 Initial load
duke
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load
duke
parents:
diff changeset
    13
 * accompanied this code).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    14
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load
duke
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    18
 *
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5042
diff changeset
    19
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5042
diff changeset
    20
 * or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5042
diff changeset
    21
 * questions.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    22
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    23
 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
    24
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    25
#ifndef SHARE_VM_RUNTIME_SAFEPOINT_HPP
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    26
#define SHARE_VM_RUNTIME_SAFEPOINT_HPP
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    27
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    28
#include "asm/assembler.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    29
#include "code/nmethod.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    30
#include "memory/allocation.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    31
#include "runtime/extendedPC.hpp"
11631
33813f69207b 7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
never
parents: 7397
diff changeset
    32
#include "runtime/mutexLocker.hpp"
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    33
#include "runtime/os.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    34
#include "utilities/ostream.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
    35
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    36
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    37
// Safepoint synchronization
489c9b5090e2 Initial load
duke
parents:
diff changeset
    38
////
489c9b5090e2 Initial load
duke
parents:
diff changeset
    39
// The VMThread or CMS_thread uses the SafepointSynchronize::begin/end
489c9b5090e2 Initial load
duke
parents:
diff changeset
    40
// methods to enter/exit a safepoint region. The begin method will roll
489c9b5090e2 Initial load
duke
parents:
diff changeset
    41
// all JavaThreads forward to a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    42
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    43
// JavaThreads must use the ThreadSafepointState abstraction (defined in
489c9b5090e2 Initial load
duke
parents:
diff changeset
    44
// thread.hpp) to indicate that that they are at a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    45
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    46
// The Mutex/Condition variable and ObjectLocker classes calls the enter/
489c9b5090e2 Initial load
duke
parents:
diff changeset
    47
// exit safepoint methods, when a thread is blocked/restarted. Hence, all mutex exter/
489c9b5090e2 Initial load
duke
parents:
diff changeset
    48
// exit points *must* be at a safepoint.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    49
489c9b5090e2 Initial load
duke
parents:
diff changeset
    50
489c9b5090e2 Initial load
duke
parents:
diff changeset
    51
class ThreadSafepointState;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    52
class SnippetCache;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    53
class nmethod;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    54
489c9b5090e2 Initial load
duke
parents:
diff changeset
    55
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    56
// Implements roll-forward to safepoint (safepoint synchronization)
489c9b5090e2 Initial load
duke
parents:
diff changeset
    57
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
    58
class SafepointSynchronize : AllStatic {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    59
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
    60
  enum SynchronizeState {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    61
      _not_synchronized = 0,                   // Threads not synchronized at a safepoint
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 13195
diff changeset
    62
                                               // Keep this value 0. See the comment in do_call_back()
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    63
      _synchronizing    = 1,                   // Synchronizing in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
    64
      _synchronized     = 2                    // All Java threads are stopped at a safepoint. Only VM thread is running
489c9b5090e2 Initial load
duke
parents:
diff changeset
    65
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
    66
489c9b5090e2 Initial load
duke
parents:
diff changeset
    67
  enum SafepointingThread {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    68
      _null_thread  = 0,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    69
      _vm_thread    = 1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    70
      _other_thread = 2
489c9b5090e2 Initial load
duke
parents:
diff changeset
    71
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
    72
489c9b5090e2 Initial load
duke
parents:
diff changeset
    73
  enum SafepointTimeoutReason {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    74
    _spinning_timeout = 0,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    75
    _blocking_timeout = 1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    76
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
    77
46702
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    78
  // The enums are listed in the order of the tasks when done serially.
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    79
  enum SafepointCleanupTasks {
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    80
    SAFEPOINT_CLEANUP_DEFLATE_MONITORS,
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    81
    SAFEPOINT_CLEANUP_UPDATE_INLINE_CACHES,
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    82
    SAFEPOINT_CLEANUP_COMPILATION_POLICY,
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    83
    SAFEPOINT_CLEANUP_SYMBOL_TABLE_REHASH,
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    84
    SAFEPOINT_CLEANUP_STRING_TABLE_REHASH,
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    85
    SAFEPOINT_CLEANUP_CLD_PURGE,
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47216
diff changeset
    86
    SAFEPOINT_CLEANUP_SYSTEM_DICTIONARY_RESIZE,
46702
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    87
    // Leave this one last.
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    88
    SAFEPOINT_CLEANUP_NUM_TASKS
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    89
  };
13ae789b982e 8180932: Parallelize safepoint cleanup
rkennke
parents: 37176
diff changeset
    90
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    91
  typedef struct {
5042
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
    92
    float  _time_stamp;                        // record when the current safepoint occurs in seconds
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    93
    int    _vmop_type;                         // type of VM operation triggers the safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
    94
    int    _nof_total_threads;                 // total number of Java threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
    95
    int    _nof_initial_running_threads;       // total number of initially seen running threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
    96
    int    _nof_threads_wait_to_block;         // total number of threads waiting for to block
489c9b5090e2 Initial load
duke
parents:
diff changeset
    97
    bool   _page_armed;                        // true if polling page is armed, false otherwise
489c9b5090e2 Initial load
duke
parents:
diff changeset
    98
    int    _nof_threads_hit_page_trap;         // total number of threads hitting the page trap
489c9b5090e2 Initial load
duke
parents:
diff changeset
    99
    jlong  _time_to_spin;                      // total time in millis spent in spinning
489c9b5090e2 Initial load
duke
parents:
diff changeset
   100
    jlong  _time_to_wait_to_block;             // total time in millis spent in waiting for to block
5042
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   101
    jlong  _time_to_do_cleanups;               // total time in millis spent in performing cleanups
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   102
    jlong  _time_to_sync;                      // total time in millis spent in getting to _synchronized
489c9b5090e2 Initial load
duke
parents:
diff changeset
   103
    jlong  _time_to_exec_vmop;                 // total time in millis spent in vm operation itself
489c9b5090e2 Initial load
duke
parents:
diff changeset
   104
  } SafepointStats;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   105
489c9b5090e2 Initial load
duke
parents:
diff changeset
   106
 private:
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 13195
diff changeset
   107
  static volatile SynchronizeState _state;     // Threads might read this flag directly, without acquiring the Threads_lock
5042
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   108
  static volatile int _waiting_to_block;       // number of threads we are waiting for to block
11631
33813f69207b 7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
never
parents: 7397
diff changeset
   109
  static int _current_jni_active_count;        // Counts the number of active critical natives during the safepoint
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   110
489c9b5090e2 Initial load
duke
parents:
diff changeset
   111
  // This counter is used for fast versions of jni_Get<Primitive>Field.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   112
  // An even value means there is no ongoing safepoint operations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   113
  // The counter is incremented ONLY at the beginning and end of each
489c9b5090e2 Initial load
duke
parents:
diff changeset
   114
  // safepoint. The fact that Threads_lock is held throughout each pair of
489c9b5090e2 Initial load
duke
parents:
diff changeset
   115
  // increments (at the beginning and end of each safepoint) guarantees
489c9b5090e2 Initial load
duke
parents:
diff changeset
   116
  // race freedom.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   117
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   118
  static volatile int _safepoint_counter;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   119
private:
5042
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   120
  static long       _end_of_last_safepoint;     // Time of last safepoint in milliseconds
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   121
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 13195
diff changeset
   122
  // Statistics
5042
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   123
  static jlong            _safepoint_begin_time;     // time when safepoint begins
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   124
  static SafepointStats*  _safepoint_stats;          // array of SafepointStats struct
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   125
  static int              _cur_stat_index;           // current index to the above array
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   126
  static julong           _safepoint_reasons[];      // safepoint count for each VM op
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   127
  static julong           _coalesced_vmop_count;     // coalesced vmop count
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   128
  static jlong            _max_sync_time;            // maximum sync time in nanos
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   129
  static jlong            _max_vmop_time;            // maximum vm operation time in nanos
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   130
  static float            _ts_of_current_safepoint;  // time stamp of current safepoint in seconds
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   131
489c9b5090e2 Initial load
duke
parents:
diff changeset
   132
  static void begin_statistics(int nof_threads, int nof_running);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   133
  static void update_statistics_on_spin_end();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   134
  static void update_statistics_on_sync_end(jlong end_time);
5042
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   135
  static void update_statistics_on_cleanup_end(jlong end_time);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   136
  static void end_statistics(jlong end_time);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   137
  static void print_statistics();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   138
  inline static void inc_page_trap_count() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   139
    Atomic::inc(&_safepoint_stats[_cur_stat_index]._nof_threads_hit_page_trap);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   140
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   141
489c9b5090e2 Initial load
duke
parents:
diff changeset
   142
  // For debug long safepoint
489c9b5090e2 Initial load
duke
parents:
diff changeset
   143
  static void print_safepoint_timeout(SafepointTimeoutReason timeout_reason);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   144
489c9b5090e2 Initial load
duke
parents:
diff changeset
   145
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   146
489c9b5090e2 Initial load
duke
parents:
diff changeset
   147
  // Main entry points
489c9b5090e2 Initial load
duke
parents:
diff changeset
   148
489c9b5090e2 Initial load
duke
parents:
diff changeset
   149
  // Roll all threads forward to safepoint. Must be called by the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   150
  // VMThread or CMS_thread.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   151
  static void begin();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   152
  static void end();                    // Start all suspended threads again...
489c9b5090e2 Initial load
duke
parents:
diff changeset
   153
489c9b5090e2 Initial load
duke
parents:
diff changeset
   154
  static bool safepoint_safe(JavaThread *thread, JavaThreadState state);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   155
11637
030466036615 7013347: allow crypto functions to be called inline to enhance performance
never
parents: 11631
diff changeset
   156
  static void check_for_lazy_critical_native(JavaThread *thread, JavaThreadState state);
030466036615 7013347: allow crypto functions to be called inline to enhance performance
never
parents: 11631
diff changeset
   157
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   158
  // Query
489c9b5090e2 Initial load
duke
parents:
diff changeset
   159
  inline static bool is_at_safepoint()   { return _state == _synchronized;  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   160
  inline static bool is_synchronizing()  { return _state == _synchronizing;  }
37176
663bdc7d0b86 8149023: Event based tracing should cover safepoint begin and end
dsimms
parents: 24424
diff changeset
   161
  inline static int safepoint_counter()  { return _safepoint_counter; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   162
11631
33813f69207b 7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
never
parents: 7397
diff changeset
   163
  inline static void increment_jni_active_count() {
33813f69207b 7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
never
parents: 7397
diff changeset
   164
    assert_locked_or_safepoint(Safepoint_lock);
33813f69207b 7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
never
parents: 7397
diff changeset
   165
    _current_jni_active_count++;
33813f69207b 7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
never
parents: 7397
diff changeset
   166
  }
33813f69207b 7129164: JNI Get/ReleasePrimitiveArrayCritical doesn't scale
never
parents: 7397
diff changeset
   167
47881
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   168
private:
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   169
  inline static bool do_call_back() {
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   170
    return (_state != _not_synchronized);
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   171
  }
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   172
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 13195
diff changeset
   173
  // Called when a thread voluntarily blocks
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   174
  static void   block(JavaThread *thread);
47881
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   175
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   176
  friend class SafepointMechanism;
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   177
0ce0ac68ace7 8189941: Implementation JEP 312: Thread-local handshake
rehn
parents: 47774
diff changeset
   178
public:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   179
  static void   signal_thread_at_safepoint()              { _waiting_to_block--; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   180
489c9b5090e2 Initial load
duke
parents:
diff changeset
   181
  // Exception handling for page polling
489c9b5090e2 Initial load
duke
parents:
diff changeset
   182
  static void handle_polling_page_exception(JavaThread *thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   183
489c9b5090e2 Initial load
duke
parents:
diff changeset
   184
  // VM Thread interface for determining safepoint rate
5042
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   185
  static long last_non_safepoint_interval() {
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   186
    return os::javaTimeMillis() - _end_of_last_safepoint;
f86707fd195a 6933402: RFE: Improve PrintSafepointStatistics output to track cleanup time
xlu
parents: 1
diff changeset
   187
  }
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6269
diff changeset
   188
  static long end_of_last_safepoint() {
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6269
diff changeset
   189
    return _end_of_last_safepoint;
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6269
diff changeset
   190
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   191
  static bool is_cleanup_needed();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   192
  static void do_cleanup_tasks();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   193
489c9b5090e2 Initial load
duke
parents:
diff changeset
   194
  static void deferred_initialize_stat();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   195
  static void print_stat_on_exit();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   196
  inline static void inc_vmop_coalesced_count() { _coalesced_vmop_count++; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   197
489c9b5090e2 Initial load
duke
parents:
diff changeset
   198
  static void set_is_at_safepoint()                        { _state = _synchronized; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   199
  static void set_is_not_at_safepoint()                    { _state = _not_synchronized; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   200
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 13195
diff changeset
   201
  // Assembly support
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   202
  static address address_of_state()                        { return (address)&_state; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   203
489c9b5090e2 Initial load
duke
parents:
diff changeset
   204
  static address safepoint_counter_addr()                  { return (address)&_safepoint_counter; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   205
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   206
489c9b5090e2 Initial load
duke
parents:
diff changeset
   207
// State class for a thread suspended at a safepoint
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 11637
diff changeset
   208
class ThreadSafepointState: public CHeapObj<mtInternal> {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   209
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   210
  // These states are maintained by VM thread while threads are being brought
489c9b5090e2 Initial load
duke
parents:
diff changeset
   211
  // to a safepoint.  After SafepointSynchronize::end(), they are reset to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   212
  // _running.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   213
  enum suspend_type {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   214
    _running                =  0, // Thread state not yet determined (i.e., not at a safepoint yet)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   215
    _at_safepoint           =  1, // Thread at a safepoint (f.ex., when blocked on a lock)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   216
    _call_back              =  2  // Keep executing and wait for callback (if thread is in interpreted or vm)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   217
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   218
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   219
  volatile bool _at_poll_safepoint;  // At polling page safepoint (NOT a poll return safepoint)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   220
  // Thread has called back the safepoint code (for debugging)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   221
  bool                           _has_called_back;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   222
489c9b5090e2 Initial load
duke
parents:
diff changeset
   223
  JavaThread *                   _thread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   224
  volatile suspend_type          _type;
6269
10e06287c0b0 6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents: 5547
diff changeset
   225
  JavaThreadState                _orig_thread_state;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   226
489c9b5090e2 Initial load
duke
parents:
diff changeset
   227
489c9b5090e2 Initial load
duke
parents:
diff changeset
   228
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   229
  ThreadSafepointState(JavaThread *thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   230
489c9b5090e2 Initial load
duke
parents:
diff changeset
   231
  // examine/roll-forward/restart
489c9b5090e2 Initial load
duke
parents:
diff changeset
   232
  void examine_state_of_thread();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   233
  void roll_forward(suspend_type type);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   234
  void restart();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   235
489c9b5090e2 Initial load
duke
parents:
diff changeset
   236
  // Query
489c9b5090e2 Initial load
duke
parents:
diff changeset
   237
  JavaThread*  thread() const         { return _thread; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   238
  suspend_type type() const           { return _type; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   239
  bool         is_running() const     { return (_type==_running); }
6269
10e06287c0b0 6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents: 5547
diff changeset
   240
  JavaThreadState orig_thread_state() const { return _orig_thread_state; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   241
489c9b5090e2 Initial load
duke
parents:
diff changeset
   242
  // Support for safepoint timeout (debugging)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   243
  bool has_called_back() const                   { return _has_called_back; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   244
  void set_has_called_back(bool val)             { _has_called_back = val; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   245
  bool              is_at_poll_safepoint() { return _at_poll_safepoint; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   246
  void              set_at_poll_safepoint(bool val) { _at_poll_safepoint = val; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   247
489c9b5090e2 Initial load
duke
parents:
diff changeset
   248
  void handle_polling_page_exception();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   249
489c9b5090e2 Initial load
duke
parents:
diff changeset
   250
  // debugging
489c9b5090e2 Initial load
duke
parents:
diff changeset
   251
  void print_on(outputStream* st) const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   252
  void print() const                        { print_on(tty); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   253
489c9b5090e2 Initial load
duke
parents:
diff changeset
   254
  // Initialize
489c9b5090e2 Initial load
duke
parents:
diff changeset
   255
  static void create(JavaThread *thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   256
  static void destroy(JavaThread *thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   257
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   258
6453
970dc585ab63 6953144: Tiered compilation
iveresov
parents: 6269
diff changeset
   259
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
   260
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6453
diff changeset
   261
#endif // SHARE_VM_RUNTIME_SAFEPOINT_HPP