jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/concurrentMark.inline.hpp@23d434c6290d (annotated)

src/share/vm/gc_implementation/g1/concurrentMark.inline.hpp@23d434c6290d (annotated)

src/share/vm/gc_implementation/g1/concurrentMark.inline.hpp

Mon, 20 Jun 2011 22:03:13 -0400

author: tonyp
date: Mon, 20 Jun 2011 22:03:13 -0400
changeset 2973: 23d434c6290d
parent 2968: 842b840e67db
child 3416: 2ace1c4ee8da
permissions: -rw-r--r--

7055073: G1: code cleanup in the concurrentMark.* files
Summary: Only cosmetic changes to make the concurrentMark.* more consistent, code-style-wise, with the rest of the codebase.
Reviewed-by: johnc, ysr

 /*
  * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * 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).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP
 #include "gc_implementation/g1/concurrentMark.hpp"
 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
 inline void CMTask::push(oop obj) {
   HeapWord* objAddr = (HeapWord*) obj;
   assert(_g1h->is_in_g1_reserved(objAddr), "invariant");
   assert(!_g1h->is_on_master_free_list(
               _g1h->heap_region_containing((HeapWord*) objAddr)), "invariant");
   assert(!_g1h->is_obj_ill(obj), "invariant");
   assert(_nextMarkBitMap->isMarked(objAddr), "invariant");
   if (_cm->verbose_high()) {
     gclog_or_tty->print_cr("[%d] pushing "PTR_FORMAT, _task_id, (void*) obj);
   }
   if (!_task_queue->push(obj)) {
     // The local task queue looks full. We need to push some entries
     // to the global stack.
     if (_cm->verbose_medium()) {
       gclog_or_tty->print_cr("[%d] task queue overflow, "
                              "moving entries to the global stack",
                              _task_id);
     }
     move_entries_to_global_stack();
     // this should succeed since, even if we overflow the global
     // stack, we should have definitely removed some entries from the
     // local queue. So, there must be space on it.
     bool success = _task_queue->push(obj);
     assert(success, "invariant");
   }
   statsOnly( int tmp_size = _task_queue->size();
              if (tmp_size > _local_max_size) {
                _local_max_size = tmp_size;
              }
              ++_local_pushes );
 }
 // This determines whether the method below will check both the local
 // and global fingers when determining whether to push on the stack a
 // gray object (value 1) or whether it will only check the global one
 // (value 0). The tradeoffs are that the former will be a bit more
 // accurate and possibly push less on the stack, but it might also be
 // a little bit slower.
 #define _CHECK_BOTH_FINGERS_      1
 inline void CMTask::deal_with_reference(oop obj) {
   if (_cm->verbose_high()) {
     gclog_or_tty->print_cr("[%d] we're dealing with reference = "PTR_FORMAT,
                            _task_id, (void*) obj);
   }
   ++_refs_reached;
   HeapWord* objAddr = (HeapWord*) obj;
   assert(obj->is_oop_or_null(true /* ignore mark word */), "Error");
  if (_g1h->is_in_g1_reserved(objAddr)) {
     assert(obj != NULL, "null check is implicit");
     if (!_nextMarkBitMap->isMarked(objAddr)) {
       // Only get the containing region if the object is not marked on the
       // bitmap (otherwise, it's a waste of time since we won't do
       // anything with it).
       HeapRegion* hr = _g1h->heap_region_containing_raw(obj);
       if (!hr->obj_allocated_since_next_marking(obj)) {
         if (_cm->verbose_high()) {
           gclog_or_tty->print_cr("[%d] "PTR_FORMAT" is not considered marked",
                                  _task_id, (void*) obj);
         }
         // we need to mark it first
         if (_nextMarkBitMap->parMark(objAddr)) {
           // No OrderAccess:store_load() is needed. It is implicit in the
           // CAS done in parMark(objAddr) above
           HeapWord* global_finger = _cm->finger();
 #if _CHECK_BOTH_FINGERS_
           // we will check both the local and global fingers
           if (_finger != NULL && objAddr < _finger) {
             if (_cm->verbose_high()) {
               gclog_or_tty->print_cr("[%d] below the local finger ("PTR_FORMAT"), "
                                      "pushing it", _task_id, _finger);
             }
             push(obj);
           } else if (_curr_region != NULL && objAddr < _region_limit) {
             // do nothing
           } else if (objAddr < global_finger) {
             // Notice that the global finger might be moving forward
             // concurrently. This is not a problem. In the worst case, we
             // mark the object while it is above the global finger and, by
             // the time we read the global finger, it has moved forward
             // passed this object. In this case, the object will probably
             // be visited when a task is scanning the region and will also
             // be pushed on the stack. So, some duplicate work, but no
             // correctness problems.
             if (_cm->verbose_high()) {
               gclog_or_tty->print_cr("[%d] below the global finger "
                                      "("PTR_FORMAT"), pushing it",
                                      _task_id, global_finger);
             }
             push(obj);
           } else {
             // do nothing
           }
 #else // _CHECK_BOTH_FINGERS_
           // we will only check the global finger
           if (objAddr < global_finger) {
             // see long comment above
             if (_cm->verbose_high()) {
               gclog_or_tty->print_cr("[%d] below the global finger "
                                      "("PTR_FORMAT"), pushing it",
                                      _task_id, global_finger);
             }
             push(obj);
           }
 #endif // _CHECK_BOTH_FINGERS_
         }
       }
     }
   }
 }
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/concurrentMark.inline.hpp@23d434c6290d (annotated)

src/share/vm/gc_implementation/g1/concurrentMark.inline.hpp