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/g1Arguments.hpp"
27#include "gc/g1/g1HeterogeneousHeapYoungGenSizer.hpp"
28#include "gc/g1/heapRegion.hpp"
29
30G1HeterogeneousHeapYoungGenSizer::G1HeterogeneousHeapYoungGenSizer() : G1YoungGenSizer() {
31 // will be used later when min and max young size is calculated.
32 _max_young_length = (uint)(G1Arguments::reasonable_max_memory_for_young() / HeapRegion::GrainBytes);
33}
34
35// Since heap is sized potentially to larger value accounting for dram + nvdimm, we need to limit
36// max young gen size to the available dram.
37// Call parent class method first and then adjust sizes based on available dram
38void G1HeterogeneousHeapYoungGenSizer::adjust_max_new_size(uint number_of_heap_regions) {
39 G1YoungGenSizer::adjust_max_new_size(number_of_heap_regions);
40 adjust_lengths_based_on_dram_memory();
41}
42
43void G1HeterogeneousHeapYoungGenSizer::heap_size_changed(uint new_number_of_heap_regions) {
44 G1YoungGenSizer::heap_size_changed(new_number_of_heap_regions);
45 adjust_lengths_based_on_dram_memory();
46}
47
48void G1HeterogeneousHeapYoungGenSizer::adjust_lengths_based_on_dram_memory() {
49 _min_desired_young_length = MIN2(_min_desired_young_length, _max_young_length);
50 _max_desired_young_length = MIN2(_max_desired_young_length, _max_young_length);
51}
52