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 // Track allocation details in the old generation. 32 class G1OldGenAllocationTracker : public CHeapObj<mtGC> { 33 // New bytes allocated in old gen between the end of the last GC and 34 // the end of the GC before that. 35 size_t _last_cycle_old_bytes; 36 // The number of seconds between the end of the last GC and 37 // the end of the GC before that. 38 double _last_cycle_duration; 39 40 size_t _allocated_bytes_since_last_gc; 41 42 void reset_cycle_after_gc() { 43 _last_cycle_old_bytes = _allocated_bytes_since_last_gc; 44 _allocated_bytes_since_last_gc = 0; 45 } 46 47 public: 48 G1OldGenAllocationTracker(); 49 // Add the given number of bytes to the total number of allocated bytes in the old gen. 50 void add_allocated_bytes_since_last_gc(size_t bytes) { _allocated_bytes_since_last_gc += bytes; } 51 52 size_t last_cycle_old_bytes() { return _last_cycle_old_bytes; } 53 54 double last_cycle_duration() { return _last_cycle_duration; } 55 56 // Reset stats after a collection. 57 void reset_after_full_gc(); 58 void reset_after_young_gc(double allocation_duration_s); 59 }; 60 61 #endif // SHARE_VM_GC_G1_G1OLDGENALLOCATIONTRACKER_HPP