1 /* 2 * Copyright (c) 2020, Amazon.com, Inc. 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 #ifndef SHARE_VM_GC_G1_G1OLDGENALLOCATIONTRACKER_HPP 26 #define SHARE_VM_GC_G1_G1OLDGENALLOCATIONTRACKER_HPP 27 28 #include "gc/g1/heapRegion.hpp" 29 #include "memory/allocation.hpp" 30 31 class G1AdaptiveIHOPControl; 32 33 // Track allocation details in the old generation. 34 class G1OldGenAllocationTracker : public CHeapObj<mtGC> { 35 // Total number of bytes allocated in the old generaton during 36 // last mutator period. 37 size_t _last_period_old_gen_bytes; 38 // Total growth of the old geneneration for last mutator period, 39 // taking eager reclaim into consideration. 40 size_t _last_period_old_gen_growth; 41 42 // Total size of humongous objects for last gc. 43 size_t _humongous_bytes_after_last_gc; 44 45 // Non-humongous old generation allocations during last mutator period. 46 size_t _allocated_bytes_since_last_gc; 47 // Humongous allocations during last mutator period. 48 size_t _allocated_humongous_bytes_since_last_gc; 49 50 public: 51 G1OldGenAllocationTracker(); 52 53 void add_allocated_bytes_since_last_gc(size_t bytes) { _allocated_bytes_since_last_gc += bytes; } 54 void add_allocated_humongous_bytes_since_last_gc(size_t bytes) { _allocated_humongous_bytes_since_last_gc += bytes; } 55 56 // Record a humongous allocation in a collection pause. This allocation 57 // is accounted to the previous mutator period. 58 void record_collection_pause_humongous_allocation(size_t bytes) { 59 _humongous_bytes_after_last_gc += bytes; 60 } 61 62 size_t last_period_old_gen_bytes() const { return _last_period_old_gen_bytes; } 63 size_t last_period_old_gen_growth() const { return _last_period_old_gen_growth; }; 64 65 // Calculates and resets stats after a collection. 66 void reset_after_gc(size_t humongous_bytes_after_gc); 67 }; 68 69 #endif // SHARE_VM_GC_G1_G1OLDGENALLOCATIONTRACKER_HPP