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 _retained_length = g1_heap->survivor()->retained_length();
36 _old_length = g1_heap->old_regions_count();
37 _archive_length = g1_heap->archive_regions_count();
38 _humongous_length = g1_heap->humongous_regions_count();
39 _metaspace_used_bytes = MetaspaceUtils::used_bytes();
40 }
41
42 G1HeapTransition::G1HeapTransition(G1CollectedHeap* g1_heap) : _g1_heap(g1_heap), _before(g1_heap) { }
43
44 struct DetailedUsage : public StackObj {
45 size_t _eden_used;
46 size_t _survivor_used;
47 size_t _old_used;
48 size_t _archive_used;
49 size_t _humongous_used;
50
51 size_t _eden_region_count;
52 size_t _survivor_region_count;
53 size_t _old_region_count;
54 size_t _archive_region_count;
55 size_t _humongous_region_count;
56
57 DetailedUsage() :
58 _eden_used(0), _survivor_used(0), _old_used(0), _archive_used(0), _humongous_used(0),
59 _eden_region_count(0), _survivor_region_count(0), _old_region_count(0),
60 _archive_region_count(0), _humongous_region_count(0) {}
61 };
62
63 class DetailedUsageClosure: public HeapRegionClosure {
64 public:
65 DetailedUsage _usage;
66 bool do_heap_region(HeapRegion* r) {
67 if (r->is_old()) {
68 _usage._old_used += r->used();
69 _usage._old_region_count++;
70 } else if (r->is_archive()) {
71 _usage._archive_used += r->used();
72 _usage._archive_region_count++;
73 } else if (r->is_survivor()) {
74 _usage._survivor_used += r->used();
75 _usage._survivor_region_count++;
76 } else if (r->is_eden()) {
77 _usage._eden_used += r->used();
78 _usage._eden_region_count++;
79 } else if (r->is_humongous()) {
80 _usage._humongous_used += r->used();
81 _usage._humongous_region_count++;
82 } else {
83 assert(r->used() == 0, "Expected used to be 0 but it was " SIZE_FORMAT, r->used());
84 }
85 return false;
86 }
87 };
88
89 void G1HeapTransition::print() {
90 Data after(_g1_heap);
91
92 size_t eden_capacity_length_after_gc = _g1_heap->policy()->young_list_target_length() - after._survivor_length;
93 size_t survivor_capacity_length_before_gc = _g1_heap->policy()->max_survivor_regions();
94
95 DetailedUsage usage;
96 if (log_is_enabled(Trace, gc, heap)) {
97 DetailedUsageClosure blk;
98 _g1_heap->heap_region_iterate(&blk);
99 usage = blk._usage;
100 assert(usage._eden_region_count == after._retained_length, "Expected eden " SIZE_FORMAT " to be same as retained region " SIZE_FORMAT,
101 usage._eden_region_count, after._retained_length);
102 assert((usage._survivor_region_count == after._survivor_length - after._retained_length),
103 "Expected survivors to be " SIZE_FORMAT " but was " SIZE_FORMAT,
104 after._survivor_length - after._retained_length, usage._survivor_region_count);
105 assert(usage._eden_region_count + usage._survivor_region_count == after._survivor_length, "Sum (" SIZE_FORMAT ") of eden ("
106 SIZE_FORMAT ") and survivors (" SIZE_FORMAT ") should be same as expected survivor count (" SIZE_FORMAT ")",
107 usage._eden_region_count + usage._survivor_region_count,
108 usage._eden_region_count, usage._survivor_region_count, after._survivor_length);
109 assert(usage._old_region_count == after._old_length, "Expected old to be " SIZE_FORMAT " but was " SIZE_FORMAT,
110 after._old_length, usage._old_region_count);
111 assert(usage._archive_region_count == after._archive_length, "Expected archive to be " SIZE_FORMAT " but was " SIZE_FORMAT,
112 after._archive_length, usage._archive_region_count);
113 assert(usage._humongous_region_count == after._humongous_length, "Expected humongous to be " SIZE_FORMAT " but was " SIZE_FORMAT,
114 after._humongous_length, usage._humongous_region_count);
115 }
116
117 log_info(gc, heap)("Eden regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")",
118 _before._eden_length, after._eden_length, eden_capacity_length_after_gc);
119 log_trace(gc, heap)(" Used: 0K, Waste: 0K");
120
121 log_info(gc, heap)("Survivor regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")",
122 _before._survivor_length, after._survivor_length, survivor_capacity_length_before_gc);
123 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
124 usage._survivor_used / K, ((after._survivor_length * HeapRegion::GrainBytes) - usage._survivor_used) / K);
125
126 log_info(gc, heap)("Old regions: " SIZE_FORMAT "->" SIZE_FORMAT,
127 _before._old_length, after._old_length);
128 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
129 usage._old_used / K, ((after._old_length * HeapRegion::GrainBytes) - usage._old_used) / K);
130
131 log_info(gc, heap)("Archive regions: " SIZE_FORMAT "->" SIZE_FORMAT,
132 _before._archive_length, after._archive_length);
133 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
134 usage._archive_used / K, ((after._archive_length * HeapRegion::GrainBytes) - usage._archive_used) / K);
135
136 log_info(gc, heap)("Humongous regions: " SIZE_FORMAT "->" SIZE_FORMAT,
137 _before._humongous_length, after._humongous_length);
138 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
139 usage._humongous_used / K, ((after._humongous_length * HeapRegion::GrainBytes) - usage._humongous_used) / K);
140
141 MetaspaceUtils::print_metaspace_change(_before._metaspace_used_bytes);
142 }