1 /*
2 * Copyright (c) 2016, 2019, 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/g1CollectedHeap.hpp"
27 #include "gc/g1/g1HeapTransition.hpp"
28 #include "gc/g1/g1Policy.hpp"
29 #include "logging/log.hpp"
30 #include "memory/metaspace.hpp"
31
32 G1HeapTransition::Data::Data(G1CollectedHeap* g1_heap) {
33 _eden_length = g1_heap->eden_regions_count();
34 _survivor_length = g1_heap->survivor_regions_count();
35 _old_length = g1_heap->old_regions_count();
36 _archive_length = g1_heap->archive_regions_count();
37 _humongous_length = g1_heap->humongous_regions_count();
38 }
39
40 G1HeapTransition::G1HeapTransition(G1CollectedHeap* g1_heap) : _g1_heap(g1_heap), _before(g1_heap) { }
41
42 struct DetailedUsage : public StackObj {
43 size_t _eden_used;
44 size_t _survivor_used;
45 size_t _old_used;
46 size_t _archive_used;
47 size_t _humongous_used;
48
49 size_t _eden_region_count;
50 size_t _survivor_region_count;
51 size_t _old_region_count;
52 size_t _archive_region_count;
53 size_t _humongous_region_count;
54
55 DetailedUsage() :
56 _eden_used(0), _survivor_used(0), _old_used(0), _archive_used(0), _humongous_used(0),
57 _eden_region_count(0), _survivor_region_count(0), _old_region_count(0),
58 _archive_region_count(0), _humongous_region_count(0) {}
59 };
60
61 class DetailedUsageClosure: public HeapRegionClosure {
62 public:
63 DetailedUsage _usage;
64 bool do_heap_region(HeapRegion* r) {
65 if (r->is_old()) {
66 _usage._old_used += r->used();
67 _usage._old_region_count++;
68 } else if (r->is_archive()) {
69 _usage._archive_used += r->used();
70 _usage._archive_region_count++;
71 } else if (r->is_survivor()) {
72 _usage._survivor_used += r->used();
73 _usage._survivor_region_count++;
74 } else if (r->is_eden()) {
75 _usage._eden_used += r->used();
76 _usage._eden_region_count++;
77 } else if (r->is_humongous()) {
78 _usage._humongous_used += r->used();
79 _usage._humongous_region_count++;
80 } else {
81 assert(r->used() == 0, "Expected used to be 0 but it was " SIZE_FORMAT, r->used());
82 }
83 return false;
84 }
85 };
86
87 void G1HeapTransition::print() {
88 Data after(_g1_heap);
89
90 size_t eden_capacity_length_after_gc = _g1_heap->policy()->young_list_target_length() - after._survivor_length;
91 size_t survivor_capacity_length_before_gc = _g1_heap->policy()->max_survivor_regions();
92
93 DetailedUsage usage;
94 if (log_is_enabled(Trace, gc, heap)) {
95 DetailedUsageClosure blk;
96 _g1_heap->heap_region_iterate(&blk);
97 usage = blk._usage;
98 assert(usage._eden_region_count == 0, "Expected no eden regions, but got " SIZE_FORMAT, usage._eden_region_count);
99 assert(usage._survivor_region_count == after._survivor_length, "Expected survivors to be " SIZE_FORMAT " but was " SIZE_FORMAT,
100 after._survivor_length, usage._survivor_region_count);
101 assert(usage._old_region_count == after._old_length, "Expected old to be " SIZE_FORMAT " but was " SIZE_FORMAT,
102 after._old_length, usage._old_region_count);
103 assert(usage._archive_region_count == after._archive_length, "Expected archive to be " SIZE_FORMAT " but was " SIZE_FORMAT,
104 after._archive_length, usage._archive_region_count);
105 assert(usage._humongous_region_count == after._humongous_length, "Expected humongous to be " SIZE_FORMAT " but was " SIZE_FORMAT,
106 after._humongous_length, usage._humongous_region_count);
107 }
108
109 log_info(gc, heap)("Eden regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")",
110 _before._eden_length, after._eden_length, eden_capacity_length_after_gc);
111 log_trace(gc, heap)(" Used: 0K, Waste: 0K");
112
113 log_info(gc, heap)("Survivor regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")",
114 _before._survivor_length, after._survivor_length, survivor_capacity_length_before_gc);
115 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
116 usage._survivor_used / K, ((after._survivor_length * HeapRegion::GrainBytes) - usage._survivor_used) / K);
117
118 log_info(gc, heap)("Old regions: " SIZE_FORMAT "->" SIZE_FORMAT,
119 _before._old_length, after._old_length);
120 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
121 usage._old_used / K, ((after._old_length * HeapRegion::GrainBytes) - usage._old_used) / K);
122
123 log_info(gc, heap)("Archive regions: " SIZE_FORMAT "->" SIZE_FORMAT,
124 _before._archive_length, after._archive_length);
125 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
126 usage._archive_used / K, ((after._archive_length * HeapRegion::GrainBytes) - usage._archive_used) / K);
127
128 log_info(gc, heap)("Humongous regions: " SIZE_FORMAT "->" SIZE_FORMAT,
129 _before._humongous_length, after._humongous_length);
130 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
131 usage._humongous_used / K, ((after._humongous_length * HeapRegion::GrainBytes) - usage._humongous_used) / K);
132
133 MetaspaceUtils::print_metaspace_change(_before._meta_sizes);
134 }