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 #include "precompiled.hpp" 26 #include "gc/g1/g1OldGenAllocationTracker.hpp" 27 #include "logging/log.hpp" 28 29 G1OldGenAllocationTracker::G1OldGenAllocationTracker() : 30 _last_period_old_gen_bytes(0), 31 _last_period_old_gen_growth(0), 32 _humongous_bytes_after_last_gc(0), 33 _allocated_bytes_since_last_gc(0), 34 _allocated_humongous_bytes_since_last_gc(0) { 35 } 36 37 void G1OldGenAllocationTracker::reset_after_gc(size_t humongous_bytes_after_gc) { 38 // Calculate actual increase in old, taking eager reclaim into consideration. 39 size_t last_period_humongous_increase = 0; 40 if (humongous_bytes_after_gc > _humongous_bytes_after_last_gc) { 41 last_period_humongous_increase = humongous_bytes_after_gc - _humongous_bytes_after_last_gc; 42 assert(last_period_humongous_increase <= _allocated_humongous_bytes_since_last_gc, 43 "Increase larger than allocated " SIZE_FORMAT " <= " SIZE_FORMAT, 44 last_period_humongous_increase, _allocated_humongous_bytes_since_last_gc); 45 } 46 _last_period_old_gen_growth = _allocated_bytes_since_last_gc + last_period_humongous_increase; 47 48 // Calculate and record needed values. 49 _last_period_old_gen_bytes = _allocated_bytes_since_last_gc + _allocated_humongous_bytes_since_last_gc; 50 _humongous_bytes_after_last_gc = humongous_bytes_after_gc; 51 52 log_debug(gc, alloc, stats)("Old generation allocation in the last mutator period, " 53 "old gen allocated: " SIZE_FORMAT "B, humongous allocated: " SIZE_FORMAT "B," 54 "old gen growth: " SIZE_FORMAT "B.", 55 _allocated_bytes_since_last_gc, 56 _allocated_humongous_bytes_since_last_gc, 57 _last_period_old_gen_growth); 58 59 // Reset for next mutator period. 60 _allocated_bytes_since_last_gc = 0; 61 _allocated_humongous_bytes_since_last_gc = 0; 62 }