hotspot/src/share/vm/gc_implementation/g1/dirtyCardQueue.cpp
author johnc
Tue, 24 Nov 2009 15:19:30 -0800
changeset 4460 8ffd47b73f43
parent 3585 6974128ccb13
child 4481 de92ec484f5e
permissions -rw-r--r--
6899058: G1: Internal error in ptrQueue.cpp:201 in nightly tests Summary: Fixes a race on the dirty card queue completed buffer list between worker thread(s) performing a flush of a deferred store barrier (enqueueing a newly completed buffer) and worker thread(s) in the RSet updating code claiming completed buffers. Removed the routine that removes elements from the completed update buffer queue using a CAS. Reviewed-by: ysr, tonyp
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     1
/*
3261
c7d5aae8d3f7 6862919: Update copyright year
xdono
parents: 2882
diff changeset
     2
 * Copyright 2001-2009 Sun Microsystems, Inc.  All Rights Reserved.
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     4
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     7
 * published by the Free Software Foundation.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     8
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    13
 * accompanied this code).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    14
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    18
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    19
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    20
 * CA 95054 USA or visit www.sun.com if you need additional information or
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    21
 * have any questions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    22
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    23
 */
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    24
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    25
# include "incls/_precompiled.incl"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    26
# include "incls/_dirtyCardQueue.cpp.incl"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    27
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    28
bool DirtyCardQueue::apply_closure(CardTableEntryClosure* cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    29
                                   bool consume,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    30
                                   size_t worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    31
  bool res = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    32
  if (_buf != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    33
    res = apply_closure_to_buffer(cl, _buf, _index, _sz,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    34
                                  consume,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    35
                                  (int) worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    36
    if (res && consume) _index = _sz;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    37
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    38
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    39
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    40
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    41
bool DirtyCardQueue::apply_closure_to_buffer(CardTableEntryClosure* cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    42
                                             void** buf,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    43
                                             size_t index, size_t sz,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    44
                                             bool consume,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    45
                                             int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    46
  if (cl == NULL) return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    47
  for (size_t i = index; i < sz; i += oopSize) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    48
    int ind = byte_index_to_index((int)i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    49
    jbyte* card_ptr = (jbyte*)buf[ind];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    50
    if (card_ptr != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    51
      // Set the entry to null, so we don't do it again (via the test
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    52
      // above) if we reconsider this buffer.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    53
      if (consume) buf[ind] = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    54
      if (!cl->do_card_ptr(card_ptr, worker_i)) return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    55
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    56
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    57
  return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    58
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    59
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    60
#ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    61
#pragma warning( disable:4355 ) // 'this' : used in base member initializer list
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    62
#endif // _MSC_VER
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    63
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    64
DirtyCardQueueSet::DirtyCardQueueSet() :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    65
  PtrQueueSet(true /*notify_when_complete*/),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    66
  _closure(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    67
  _shared_dirty_card_queue(this, true /*perm*/),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    68
  _free_ids(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    69
  _processed_buffers_mut(0), _processed_buffers_rs_thread(0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    70
{
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    71
  _all_active = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    72
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    73
2882
d508a8bac491 6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents: 2881
diff changeset
    74
// Determines how many mutator threads can process the buffers in parallel.
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    75
size_t DirtyCardQueueSet::num_par_ids() {
2882
d508a8bac491 6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents: 2881
diff changeset
    76
  return os::processor_count();
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    77
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    78
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    79
void DirtyCardQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    80
                                   int max_completed_queue,
2142
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 1623
diff changeset
    81
                                   Mutex* lock, PtrQueueSet* fl_owner) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 1623
diff changeset
    82
  PtrQueueSet::initialize(cbl_mon, fl_lock, max_completed_queue, fl_owner);
3583
805584e16d0f 6864886: G1: rename -XX parameters related to update buffers
tonyp
parents: 2882
diff changeset
    83
  set_buffer_size(G1UpdateBufferSize);
805584e16d0f 6864886: G1: rename -XX parameters related to update buffers
tonyp
parents: 2882
diff changeset
    84
  set_process_completed_threshold(G1UpdateBufferQueueProcessingThreshold);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    85
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    86
  _shared_dirty_card_queue.set_lock(lock);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    87
  _free_ids = new FreeIdSet((int) num_par_ids(), _cbl_mon);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    88
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    89
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    90
void DirtyCardQueueSet::handle_zero_index_for_thread(JavaThread* t) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    91
  t->dirty_card_queue().handle_zero_index();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    92
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    93
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    94
void DirtyCardQueueSet::set_closure(CardTableEntryClosure* closure) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    95
  _closure = closure;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    96
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    97
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    98
void DirtyCardQueueSet::iterate_closure_all_threads(bool consume,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    99
                                                    size_t worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   100
  assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   101
  for(JavaThread* t = Threads::first(); t; t = t->next()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   102
    bool b = t->dirty_card_queue().apply_closure(_closure, consume);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   103
    guarantee(b, "Should not be interrupted.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   104
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   105
  bool b = shared_dirty_card_queue()->apply_closure(_closure,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   106
                                                    consume,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   107
                                                    worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   108
  guarantee(b, "Should not be interrupted.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   109
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   110
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   111
bool DirtyCardQueueSet::mut_process_buffer(void** buf) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   112
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   113
  // Used to determine if we had already claimed a par_id
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   114
  // before entering this method.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   115
  bool already_claimed = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   116
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   117
  // We grab the current JavaThread.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   118
  JavaThread* thread = JavaThread::current();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   119
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   120
  // We get the the number of any par_id that this thread
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   121
  // might have already claimed.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   122
  int worker_i = thread->get_claimed_par_id();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   123
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   124
  // If worker_i is not -1 then the thread has already claimed
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   125
  // a par_id. We make note of it using the already_claimed value
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   126
  if (worker_i != -1) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   127
    already_claimed = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   128
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   129
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   130
    // Otherwise we need to claim a par id
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   131
    worker_i = _free_ids->claim_par_id();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   132
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   133
    // And store the par_id value in the thread
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   134
    thread->set_claimed_par_id(worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   135
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   136
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   137
  bool b = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   138
  if (worker_i != -1) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   139
    b = DirtyCardQueue::apply_closure_to_buffer(_closure, buf, 0,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   140
                                                _sz, true, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   141
    if (b) Atomic::inc(&_processed_buffers_mut);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   142
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   143
    // If we had not claimed an id before entering the method
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   144
    // then we must release the id.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   145
    if (!already_claimed) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   146
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   147
      // we release the id
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   148
      _free_ids->release_par_id(worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   149
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   150
      // and set the claimed_id in the thread to -1
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   151
      thread->set_claimed_par_id(-1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   152
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   153
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   154
  return b;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   155
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   156
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   157
DirtyCardQueueSet::CompletedBufferNode*
4460
8ffd47b73f43 6899058: G1: Internal error in ptrQueue.cpp:201 in nightly tests
johnc
parents: 3585
diff changeset
   158
DirtyCardQueueSet::get_completed_buffer(int stop_at) {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   159
  CompletedBufferNode* nd = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   160
  MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   161
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   162
  if ((int)_n_completed_buffers <= stop_at) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   163
    _process_completed = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   164
    return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   165
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   166
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   167
  if (_completed_buffers_head != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   168
    nd = _completed_buffers_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   169
    _completed_buffers_head = nd->next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   170
    if (_completed_buffers_head == NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   171
      _completed_buffers_tail = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   172
    _n_completed_buffers--;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   173
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   174
  debug_only(assert_completed_buffer_list_len_correct_locked());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   175
  return nd;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   176
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   177
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   178
bool DirtyCardQueueSet::
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   179
apply_closure_to_completed_buffer_helper(int worker_i,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   180
                                         CompletedBufferNode* nd) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   181
  if (nd != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   182
    bool b =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   183
      DirtyCardQueue::apply_closure_to_buffer(_closure, nd->buf,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   184
                                              nd->index, _sz,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   185
                                              true, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   186
    void** buf = nd->buf;
1396
b8deeac307ca 6742641: G1: NullPointerException during GCOld
tonyp
parents: 1374
diff changeset
   187
    size_t index = nd->index;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   188
    delete nd;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   189
    if (b) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   190
      deallocate_buffer(buf);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   191
      return true;  // In normal case, go on to next buffer.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   192
    } else {
1396
b8deeac307ca 6742641: G1: NullPointerException during GCOld
tonyp
parents: 1374
diff changeset
   193
      enqueue_complete_buffer(buf, index, true);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   194
      return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   195
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   196
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   197
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   198
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   199
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   200
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   201
bool DirtyCardQueueSet::apply_closure_to_completed_buffer(int worker_i,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   202
                                                          int stop_at,
4460
8ffd47b73f43 6899058: G1: Internal error in ptrQueue.cpp:201 in nightly tests
johnc
parents: 3585
diff changeset
   203
                                                          bool during_pause)
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   204
{
4460
8ffd47b73f43 6899058: G1: Internal error in ptrQueue.cpp:201 in nightly tests
johnc
parents: 3585
diff changeset
   205
  assert(!during_pause || stop_at == 0, "Should not leave any completed buffers during a pause");
8ffd47b73f43 6899058: G1: Internal error in ptrQueue.cpp:201 in nightly tests
johnc
parents: 3585
diff changeset
   206
  CompletedBufferNode* nd = get_completed_buffer(stop_at);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   207
  bool res = apply_closure_to_completed_buffer_helper(worker_i, nd);
2881
74a1337e4acc 6484957: G1: parallel concurrent refinement
iveresov
parents: 2142
diff changeset
   208
  if (res) Atomic::inc(&_processed_buffers_rs_thread);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   209
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   210
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   211
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   212
void DirtyCardQueueSet::apply_closure_to_all_completed_buffers() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   213
  CompletedBufferNode* nd = _completed_buffers_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   214
  while (nd != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   215
    bool b =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   216
      DirtyCardQueue::apply_closure_to_buffer(_closure, nd->buf, 0, _sz,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   217
                                              false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   218
    guarantee(b, "Should not stop early.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   219
    nd = nd->next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   220
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   221
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   222
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   223
void DirtyCardQueueSet::abandon_logs() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   224
  assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   225
  CompletedBufferNode* buffers_to_delete = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   226
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   227
    MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   228
    while (_completed_buffers_head != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   229
      CompletedBufferNode* nd = _completed_buffers_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   230
      _completed_buffers_head = nd->next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   231
      nd->next = buffers_to_delete;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   232
      buffers_to_delete = nd;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   233
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   234
    _n_completed_buffers = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   235
    _completed_buffers_tail = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   236
    debug_only(assert_completed_buffer_list_len_correct_locked());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   237
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   238
  while (buffers_to_delete != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   239
    CompletedBufferNode* nd = buffers_to_delete;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   240
    buffers_to_delete = nd->next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   241
    deallocate_buffer(nd->buf);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   242
    delete nd;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   243
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   244
  // Since abandon is done only at safepoints, we can safely manipulate
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   245
  // these queues.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   246
  for (JavaThread* t = Threads::first(); t; t = t->next()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   247
    t->dirty_card_queue().reset();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   248
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   249
  shared_dirty_card_queue()->reset();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   250
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   251
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   252
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   253
void DirtyCardQueueSet::concatenate_logs() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   254
  // Iterate over all the threads, if we find a partial log add it to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   255
  // the global list of logs.  Temporarily turn off the limit on the number
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   256
  // of outstanding buffers.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   257
  int save_max_completed_queue = _max_completed_queue;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   258
  _max_completed_queue = max_jint;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   259
  assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   260
  for (JavaThread* t = Threads::first(); t; t = t->next()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   261
    DirtyCardQueue& dcq = t->dirty_card_queue();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   262
    if (dcq.size() != 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   263
      void **buf = t->dirty_card_queue().get_buf();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   264
      // We must NULL out the unused entries, then enqueue.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   265
      for (size_t i = 0; i < t->dirty_card_queue().get_index(); i += oopSize) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   266
        buf[PtrQueue::byte_index_to_index((int)i)] = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   267
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   268
      enqueue_complete_buffer(dcq.get_buf(), dcq.get_index());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   269
      dcq.reinitialize();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   270
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   271
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   272
  if (_shared_dirty_card_queue.size() != 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   273
    enqueue_complete_buffer(_shared_dirty_card_queue.get_buf(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   274
                            _shared_dirty_card_queue.get_index());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   275
    _shared_dirty_card_queue.reinitialize();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   276
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   277
  // Restore the completed buffer queue limit.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   278
  _max_completed_queue = save_max_completed_queue;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   279
}