1 /*
2 * Copyright (c) 2016, 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 _humongous_length = g1_heap->humongous_regions_count();
37 _metaspace_used_bytes = MetaspaceAux::used_bytes();
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 _humongous_used;
47
48 size_t _eden_region_count;
49 size_t _survivor_region_count;
50 size_t _old_region_count;
51 size_t _humongous_region_count;
52
53 DetailedUsage() :
54 _eden_used(0), _survivor_used(0), _old_used(0), _humongous_used(0),
55 _eden_region_count(0), _survivor_region_count(0), _old_region_count(0), _humongous_region_count(0) {}
56 };
57
58 class DetailedUsageClosure: public HeapRegionClosure {
59 public:
60 DetailedUsage _usage;
61 bool doHeapRegion(HeapRegion* r) {
62 if (r->is_old()) {
63 _usage._old_used += r->used();
64 _usage._old_region_count++;
65 } else if (r->is_survivor()) {
66 _usage._survivor_used += r->used();
67 _usage._survivor_region_count++;
68 } else if (r->is_eden()) {
69 _usage._eden_used += r->used();
70 _usage._eden_region_count++;
71 } else if (r->is_humongous()) {
72 _usage._humongous_used += r->used();
73 _usage._humongous_region_count++;
74 } else {
75 assert(r->used() == 0, "Expected used to be 0 but it was " SIZE_FORMAT, r->used());
76 }
77 return false;
78 }
79 };
80
81 void G1HeapTransition::print() {
82 Data after(_g1_heap);
83
84 size_t eden_capacity_length_after_gc = _g1_heap->g1_policy()->young_list_target_length() - after._survivor_length;
85 size_t survivor_capacity_length_after_gc = _g1_heap->g1_policy()->max_survivor_regions();
86
87 DetailedUsage usage;
88 if (log_is_enabled(Trace, gc, heap)) {
89 DetailedUsageClosure blk;
90 _g1_heap->heap_region_iterate(&blk);
91 usage = blk._usage;
92 assert(usage._eden_region_count == 0, "Expected no eden regions, but got " SIZE_FORMAT, usage._eden_region_count);
93 assert(usage._survivor_region_count == after._survivor_length, "Expected survivors to be " SIZE_FORMAT " but was " SIZE_FORMAT,
94 after._survivor_length, usage._survivor_region_count);
95 assert(usage._old_region_count == after._old_length, "Expected old to be " SIZE_FORMAT " but was " SIZE_FORMAT,
96 after._old_length, usage._old_region_count);
97 assert(usage._humongous_region_count == after._humongous_length, "Expected humongous to be " SIZE_FORMAT " but was " SIZE_FORMAT,
98 after._humongous_length, usage._humongous_region_count);
99 }
100
101 log_info(gc, heap)("Eden regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")",
102 _before._eden_length, after._eden_length, eden_capacity_length_after_gc);
103 log_trace(gc, heap)(" Used: 0K, Waste: 0K");
104
105 log_info(gc, heap)("Survivor regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")",
106 _before._survivor_length, after._survivor_length, survivor_capacity_length_after_gc);
107 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
108 usage._survivor_used / K, ((after._survivor_length * HeapRegion::GrainBytes) - usage._survivor_used) / K);
109
110 log_info(gc, heap)("Old regions: " SIZE_FORMAT "->" SIZE_FORMAT,
111 _before._old_length, after._old_length);
112 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
113 usage._old_used / K, ((after._old_length * HeapRegion::GrainBytes) - usage._old_used) / K);
114
115 log_info(gc, heap)("Humongous regions: " SIZE_FORMAT "->" SIZE_FORMAT,
116 _before._humongous_length, after._humongous_length);
117 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K",
118 usage._humongous_used / K, ((after._humongous_length * HeapRegion::GrainBytes) - usage._humongous_used) / K);
119
120 MetaspaceAux::print_metaspace_change(_before._metaspace_used_bytes);
121 }