jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp@86e6d691f2e1 (annotated)

src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp@86e6d691f2e1 (annotated)

src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp

Sat, 23 Nov 2013 12:25:13 +0100

author: mgronlun
date: Sat, 23 Nov 2013 12:25:13 +0100
changeset 6131: 86e6d691f2e1
parent 5166: 7c5a1b62f53d
child 6198: 55fb97c4c58d
permissions: -rw-r--r--

8028128: Add a type safe alternative for working with counter based data
Reviewed-by: dholmes, egahlin

 /*
  * Copyright (c) 2001, 2010, 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_MEMORY_ADAPTIVEFREELIST_HPP
 #define SHARE_VM_MEMORY_ADAPTIVEFREELIST_HPP
 #include "memory/freeList.hpp"
 #include "gc_implementation/shared/allocationStats.hpp"
 class CompactibleFreeListSpace;
 // A class for maintaining a free list of Chunk's.  The FreeList
 // maintains a the structure of the list (head, tail, etc.) plus
 // statistics for allocations from the list.  The links between items
 // are not part of FreeList.  The statistics are
 // used to make decisions about coalescing Chunk's when they
 // are swept during collection.
 //
 // See the corresponding .cpp file for a description of the specifics
 // for that implementation.
 class Mutex;
 template <class Chunk>
 class AdaptiveFreeList : public FreeList<Chunk> {
   friend class CompactibleFreeListSpace;
   friend class VMStructs;
   // friend class PrintTreeCensusClosure<Chunk, FreeList_t>;
   size_t        _hint;          // next larger size list with a positive surplus
   AllocationStats _allocation_stats; // allocation-related statistics
  public:
   AdaptiveFreeList();
   using FreeList<Chunk>::assert_proper_lock_protection;
 #ifdef ASSERT
   using FreeList<Chunk>::protecting_lock;
 #endif
   using FreeList<Chunk>::count;
   using FreeList<Chunk>::size;
   using FreeList<Chunk>::verify_chunk_in_free_list;
   using FreeList<Chunk>::getFirstNChunksFromList;
   using FreeList<Chunk>::print_on;
   void return_chunk_at_head(Chunk* fc, bool record_return);
   void return_chunk_at_head(Chunk* fc);
   void return_chunk_at_tail(Chunk* fc, bool record_return);
   void return_chunk_at_tail(Chunk* fc);
   using FreeList<Chunk>::return_chunk_at_tail;
   using FreeList<Chunk>::remove_chunk;
   using FreeList<Chunk>::prepend;
   using FreeList<Chunk>::print_labels_on;
   using FreeList<Chunk>::get_chunk_at_head;
   // Initialize.
   void initialize();
   // Reset the head, tail, hint, and count of a free list.
   void reset(size_t hint);
   void assert_proper_lock_protection_work() const PRODUCT_RETURN;
   void print_on(outputStream* st, const char* c = NULL) const;
   size_t hint() const {
     return _hint;
   }
   void set_hint(size_t v) {
     assert_proper_lock_protection();
     assert(v == 0 || size() < v, "Bad hint");
     _hint = v;
   }
   size_t get_better_size();
   // Accessors for statistics
   void init_statistics(bool split_birth = false);
   AllocationStats* allocation_stats() {
     assert_proper_lock_protection();
     return &_allocation_stats;
   }
   ssize_t desired() const {
     return _allocation_stats.desired();
   }
   void set_desired(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_desired(v);
   }
   void compute_desired(float inter_sweep_current,
                        float inter_sweep_estimate,
                        float intra_sweep_estimate) {
     assert_proper_lock_protection();
     _allocation_stats.compute_desired(count(),
                                       inter_sweep_current,
                                       inter_sweep_estimate,
                                       intra_sweep_estimate);
   }
   ssize_t coal_desired() const {
     return _allocation_stats.coal_desired();
   }
   void set_coal_desired(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_coal_desired(v);
   }
   ssize_t surplus() const {
     return _allocation_stats.surplus();
   }
   void set_surplus(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_surplus(v);
   }
   void increment_surplus() {
     assert_proper_lock_protection();
     _allocation_stats.increment_surplus();
   }
   void decrement_surplus() {
     assert_proper_lock_protection();
     _allocation_stats.decrement_surplus();
   }
   ssize_t bfr_surp() const {
     return _allocation_stats.bfr_surp();
   }
   void set_bfr_surp(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_bfr_surp(v);
   }
   ssize_t prev_sweep() const {
     return _allocation_stats.prev_sweep();
   }
   void set_prev_sweep(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_prev_sweep(v);
   }
   ssize_t before_sweep() const {
     return _allocation_stats.before_sweep();
   }
   void set_before_sweep(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_before_sweep(v);
   }
   ssize_t coal_births() const {
     return _allocation_stats.coal_births();
   }
   void set_coal_births(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_coal_births(v);
   }
   void increment_coal_births() {
     assert_proper_lock_protection();
     _allocation_stats.increment_coal_births();
   }
   ssize_t coal_deaths() const {
     return _allocation_stats.coal_deaths();
   }
   void set_coal_deaths(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_coal_deaths(v);
   }
   void increment_coal_deaths() {
     assert_proper_lock_protection();
     _allocation_stats.increment_coal_deaths();
   }
   ssize_t split_births() const {
     return _allocation_stats.split_births();
   }
   void set_split_births(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_split_births(v);
   }
   void increment_split_births() {
     assert_proper_lock_protection();
     _allocation_stats.increment_split_births();
   }
   ssize_t split_deaths() const {
     return _allocation_stats.split_deaths();
   }
   void set_split_deaths(ssize_t v) {
     assert_proper_lock_protection();
     _allocation_stats.set_split_deaths(v);
   }
   void increment_split_deaths() {
     assert_proper_lock_protection();
     _allocation_stats.increment_split_deaths();
   }
 #ifndef PRODUCT
   // For debugging.  The "_returned_bytes" in all the lists are summed
   // and compared with the total number of bytes swept during a
   // collection.
   size_t returned_bytes() const { return _allocation_stats.returned_bytes(); }
   void set_returned_bytes(size_t v) { _allocation_stats.set_returned_bytes(v); }
   void increment_returned_bytes_by(size_t v) {
     _allocation_stats.set_returned_bytes(_allocation_stats.returned_bytes() + v);
   }
   // Stats verification
   void verify_stats() const;
 #endif  // NOT PRODUCT
 };
 #endif // SHARE_VM_MEMORY_ADAPTIVEFREELIST_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp@86e6d691f2e1 (annotated)

src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp