jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.cpp@a9becfeecd1b (annotated)

src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.cpp@a9becfeecd1b (annotated)

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

Wed, 22 Jan 2014 17:42:23 -0800

author: kvn
date: Wed, 22 Jan 2014 17:42:23 -0800
changeset 6503: a9becfeecd1b
parent 6461: bdd155477289
parent 6198: 55fb97c4c58d
child 6680: 78bbf4d43a14
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 2012, 2013, 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.
  *
  */
 #include "precompiled.hpp"
 #include "gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp"
 #include "gc_implementation/concurrentMarkSweep/freeChunk.hpp"
 #include "memory/freeBlockDictionary.hpp"
 #include "memory/sharedHeap.hpp"
 #include "runtime/globals.hpp"
 #include "runtime/mutex.hpp"
 #include "runtime/vmThread.hpp"
 template <>
 void AdaptiveFreeList<FreeChunk>::print_on(outputStream* st, const char* c) const {
   if (c != NULL) {
     st->print("%16s", c);
   } else {
     st->print(SIZE_FORMAT_W(16), size());
   }
   st->print("\t"
            SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\t"
            SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\t" SSIZE_FORMAT_W(14) "\n",
            bfr_surp(),             surplus(),             desired(),             prev_sweep(),           before_sweep(),
            count(),               coal_births(),          coal_deaths(),          split_births(),         split_deaths());
 }
 template <class Chunk>
 AdaptiveFreeList<Chunk>::AdaptiveFreeList() : FreeList<Chunk>(), _hint(0) {
   init_statistics();
 }
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::initialize() {
   FreeList<Chunk>::initialize();
   set_hint(0);
   init_statistics(true /* split_birth */);
 }
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::reset(size_t hint) {
   FreeList<Chunk>::reset();
   set_hint(hint);
 }
 #ifndef PRODUCT
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::assert_proper_lock_protection_work() const {
   assert(protecting_lock() != NULL, "Don't call this directly");
   assert(ParallelGCThreads > 0, "Don't call this directly");
   Thread* thr = Thread::current();
   if (thr->is_VM_thread() || thr->is_ConcurrentGC_thread()) {
     // assert that we are holding the freelist lock
   } else if (thr->is_GC_task_thread()) {
     assert(protecting_lock()->owned_by_self(), "FreeList RACE DETECTED");
   } else if (thr->is_Java_thread()) {
     assert(!SafepointSynchronize::is_at_safepoint(), "Should not be executing");
   } else {
     ShouldNotReachHere();  // unaccounted thread type?
   }
 }
 #endif
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::init_statistics(bool split_birth) {
   _allocation_stats.initialize(split_birth);
 }
 template <class Chunk>
 size_t AdaptiveFreeList<Chunk>::get_better_size() {
   // A candidate chunk has been found.  If it is already under
   // populated and there is a hinT, REturn the hint().  Else
   // return the size of this chunk.
   if (surplus() <= 0) {
     if (hint() != 0) {
       return hint();
     } else {
       return size();
     }
   } else {
     // This list has a surplus so use it.
     return size();
   }
 }
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::return_chunk_at_head(Chunk* chunk) {
   assert_proper_lock_protection();
   return_chunk_at_head(chunk, true);
 }
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::return_chunk_at_head(Chunk* chunk, bool record_return) {
   FreeList<Chunk>::return_chunk_at_head(chunk, record_return);
 #ifdef ASSERT
   if (record_return) {
     increment_returned_bytes_by(size()*HeapWordSize);
   }
 #endif
 }
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::return_chunk_at_tail(Chunk* chunk) {
   AdaptiveFreeList<Chunk>::return_chunk_at_tail(chunk, true);
 }
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::return_chunk_at_tail(Chunk* chunk, bool record_return) {
   FreeList<Chunk>::return_chunk_at_tail(chunk, record_return);
 #ifdef ASSERT
   if (record_return) {
     increment_returned_bytes_by(size()*HeapWordSize);
   }
 #endif
 }
 #ifndef PRODUCT
 template <class Chunk>
 void AdaptiveFreeList<Chunk>::verify_stats() const {
   // The +1 of the LH comparand is to allow some "looseness" in
   // checking: we usually call this interface when adding a block
   // and we'll subsequently update the stats; we cannot update the
   // stats beforehand because in the case of the large-block BT
   // dictionary for example, this might be the first block and
   // in that case there would be no place that we could record
   // the stats (which are kept in the block itself).
   assert((_allocation_stats.prev_sweep() + _allocation_stats.split_births()
           + _allocation_stats.coal_births() + 1)   // Total Production Stock + 1
          >= (_allocation_stats.split_deaths() + _allocation_stats.coal_deaths()
              + (ssize_t)count()),                // Total Current Stock + depletion
          err_msg("FreeList " PTR_FORMAT " of size " SIZE_FORMAT
                  " violates Conservation Principle: "
                  "prev_sweep(" SIZE_FORMAT ")"
                  " + split_births(" SIZE_FORMAT ")"
                  " + coal_births(" SIZE_FORMAT ") + 1 >= "
                  " split_deaths(" SIZE_FORMAT ")"
                  " coal_deaths(" SIZE_FORMAT ")"
                  " + count(" SSIZE_FORMAT ")",
                  this, size(), _allocation_stats.prev_sweep(), _allocation_stats.split_births(),
                  _allocation_stats.split_births(), _allocation_stats.split_deaths(),
                  _allocation_stats.coal_deaths(), count()));
 }
 #endif
 // Needs to be after the definitions have been seen.
 template class AdaptiveFreeList<FreeChunk>;

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.cpp@a9becfeecd1b (annotated)

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