jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/markSweep.inline.hpp@aaf61e68b255 (annotated)

src/share/vm/gc_implementation/shared/markSweep.inline.hpp@aaf61e68b255 (annotated)

src/share/vm/gc_implementation/shared/markSweep.inline.hpp

Mon, 06 Aug 2012 12:20:14 -0700

author: johnc
date: Mon, 06 Aug 2012 12:20:14 -0700
changeset 3982: aaf61e68b255
parent 3298: 7913e93dca52
child 4037: da91efe96a93
permissions: -rw-r--r--

6818524: G1: use ergonomic resizing of PLABs
Summary: Employ PLABStats instances to record information about survivor and old PLABs, and use the recorded stats to adjust the sizes of survivor and old PLABS.
Reviewed-by: johnc, ysr
Contributed-by: Brandon Mitchell <brandon@twitter.com>

 /*
  * Copyright (c) 2000, 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
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  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
 #include "gc_implementation/shared/markSweep.hpp"
 #include "gc_interface/collectedHeap.hpp"
 #include "utilities/stack.inline.hpp"
 #ifndef SERIALGC
 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
 #endif
 inline void MarkSweep::mark_object(oop obj) {
   // some marks may contain information we need to preserve so we store them away
   // and overwrite the mark.  We'll restore it at the end of markSweep.
   markOop mark = obj->mark();
   obj->set_mark(markOopDesc::prototype()->set_marked());
   if (mark->must_be_preserved(obj)) {
     preserve_mark(obj, mark);
   }
 }
 template <class T> inline void MarkSweep::follow_root(T* p) {
   assert(!Universe::heap()->is_in_reserved(p),
          "roots shouldn't be things within the heap");
 #ifdef VALIDATE_MARK_SWEEP
   if (ValidateMarkSweep) {
     guarantee(!_root_refs_stack->contains(p), "should only be in here once");
     _root_refs_stack->push(p);
   }
 #endif
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     if (!obj->mark()->is_marked()) {
       mark_object(obj);
       obj->follow_contents();
     }
   }
   follow_stack();
 }
 template <class T> inline void MarkSweep::mark_and_push(T* p) {
 //  assert(Universe::heap()->is_in_reserved(p), "should be in object space");
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
     if (!obj->mark()->is_marked()) {
       mark_object(obj);
       _marking_stack.push(obj);
     }
   }
 }
 void MarkSweep::push_objarray(oop obj, size_t index) {
   ObjArrayTask task(obj, index);
   assert(task.is_valid(), "bad ObjArrayTask");
   _objarray_stack.push(task);
 }
 template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) {
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop)) {
     oop obj     = oopDesc::decode_heap_oop_not_null(heap_oop);
     oop new_obj = oop(obj->mark()->decode_pointer());
     assert(new_obj != NULL ||                         // is forwarding ptr?
            obj->mark() == markOopDesc::prototype() || // not gc marked?
            (UseBiasedLocking && obj->mark()->has_bias_pattern()) ||
                                                       // not gc marked?
            obj->is_shared(),                          // never forwarded?
            "should be forwarded");
     if (new_obj != NULL) {
       assert(Universe::heap()->is_in_reserved(new_obj),
              "should be in object space");
       oopDesc::encode_store_heap_oop_not_null(p, new_obj);
     }
   }
   VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot));
 }
 template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) {
 #ifdef VALIDATE_MARK_SWEEP
   if (ValidateMarkSweep) {
     if (!Universe::heap()->is_in_reserved(p)) {
       _root_refs_stack->push(p);
     } else {
       _other_refs_stack->push(p);
     }
   }
 #endif
   mark_and_push(p);
 }
 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/shared/markSweep.inline.hpp@aaf61e68b255 (annotated)

src/share/vm/gc_implementation/shared/markSweep.inline.hpp