1 /*
   2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4 *
   5 * This code is free software; you can redistribute it and/or modify it
   6 * under the terms of the GNU General Public License version 2 only, as
   7 * published by the Free Software Foundation.
   8 *
   9 * This code is distributed in the hope that it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 * version 2 for more details (a copy is included in the LICENSE file that
  13 * accompanied this code).
  14 *
  15 * You should have received a copy of the GNU General Public License version
  16 * 2 along with this work; if not, write to the Free Software Foundation,
  17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18 *
  19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20 * or visit www.oracle.com if you need additional information or have any
  21 * questions.
  22 *
  23 */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/g1/g1HeterogeneousHeapPolicy.hpp"
  27 #include "gc/g1/g1CollectedHeap.hpp"
  28 #include "gc/g1/g1Policy.hpp"
  29 #include "gc/g1/heterogeneousHeapRegionManager.hpp"
  30 
  31 G1HeterogeneousHeapPolicy::G1HeterogeneousHeapPolicy(STWGCTimer* gc_timer) : G1Policy(gc_timer), _g1h(NULL) {}
  32 
  33 // We call the super class init(), after which we provision young_list_target_length() regions in dram.
  34 void G1HeterogeneousHeapPolicy::init(G1CollectedHeap* g1h, G1CollectionSet* collection_set) {
  35   G1Policy::init(g1h, collection_set);
  36   _g1h = g1h;
  37   static_cast<HeterogeneousHeapRegionManager*>(g1h->hrm())->adjust_dram_regions((uint)young_list_target_length(), _g1h->workers());
  38 }
  39 
  40 // After a collection pause, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
  41 void G1HeterogeneousHeapPolicy::record_collection_pause_end(double pause_time_ms, size_t cards_scanned, size_t heap_used_bytes_before_gc) {
  42   G1Policy::record_collection_pause_end(pause_time_ms, cards_scanned, heap_used_bytes_before_gc);
  43   static_cast<HeterogeneousHeapRegionManager*>(_g1h->hrm())->adjust_dram_regions((uint)young_list_target_length(), _g1h->workers());
  44 }
  45 
  46 // After a full collection, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
  47 void G1HeterogeneousHeapPolicy::record_full_collection_end() {
  48   G1Policy::record_full_collection_end();
  49   static_cast<HeterogeneousHeapRegionManager*>(_g1h->hrm())->adjust_dram_regions((uint)young_list_target_length(), _g1h->workers());
  50 }
  51 
  52 bool G1HeterogeneousHeapPolicy::need_to_perform_full_collection_after_partial() {
  53   if (static_cast<HeterogeneousHeapRegionManager*>(_g1h->hrm())->has_borrowed_regions()) {
  54     return true;
  55   }
  56   return false;
  57 }