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 | _metaspace_used_bytes = MetaspaceUtils::used_bytes(); |
39 | } |
40 | |
41 | G1HeapTransition::G1HeapTransition(G1CollectedHeap* g1_heap) : _g1_heap(g1_heap), _before(g1_heap) { } |
42 | |
43 | struct DetailedUsage : public StackObj { |
44 | size_t _eden_used; |
45 | size_t _survivor_used; |
46 | size_t _old_used; |
47 | size_t _archive_used; |
48 | size_t _humongous_used; |
49 | |
50 | size_t _eden_region_count; |
51 | size_t _survivor_region_count; |
52 | size_t _old_region_count; |
53 | size_t _archive_region_count; |
54 | size_t _humongous_region_count; |
55 | |
56 | DetailedUsage() : |
57 | _eden_used(0), _survivor_used(0), _old_used(0), _archive_used(0), _humongous_used(0), |
58 | _eden_region_count(0), _survivor_region_count(0), _old_region_count(0), |
59 | _archive_region_count(0), _humongous_region_count(0) {} |
60 | }; |
61 | |
62 | class DetailedUsageClosure: public HeapRegionClosure { |
63 | public: |
64 | DetailedUsage _usage; |
65 | bool do_heap_region(HeapRegion* r) { |
66 | if (r->is_old()) { |
67 | _usage._old_used += r->used(); |
68 | _usage._old_region_count++; |
69 | } else if (r->is_archive()) { |
70 | _usage._archive_used += r->used(); |
71 | _usage._archive_region_count++; |
72 | } else if (r->is_survivor()) { |
73 | _usage._survivor_used += r->used(); |
74 | _usage._survivor_region_count++; |
75 | } else if (r->is_eden()) { |
76 | _usage._eden_used += r->used(); |
77 | _usage._eden_region_count++; |
78 | } else if (r->is_humongous()) { |
79 | _usage._humongous_used += r->used(); |
80 | _usage._humongous_region_count++; |
81 | } else { |
82 | assert(r->used() == 0, "Expected used to be 0 but it was " SIZE_FORMAT, r->used()); |
83 | } |
84 | return false; |
85 | } |
86 | }; |
87 | |
88 | void G1HeapTransition::print() { |
89 | Data after(_g1_heap); |
90 | |
91 | size_t eden_capacity_length_after_gc = _g1_heap->policy()->young_list_target_length() - after._survivor_length; |
92 | size_t survivor_capacity_length_before_gc = _g1_heap->policy()->max_survivor_regions(); |
93 | |
94 | DetailedUsage usage; |
95 | if (log_is_enabled(Trace, gc, heap)) { |
96 | DetailedUsageClosure blk; |
97 | _g1_heap->heap_region_iterate(&blk); |
98 | usage = blk._usage; |
99 | assert(usage._eden_region_count == 0, "Expected no eden regions, but got " SIZE_FORMAT, usage._eden_region_count); |
100 | assert(usage._survivor_region_count == after._survivor_length, "Expected survivors to be " SIZE_FORMAT " but was " SIZE_FORMAT, |
101 | after._survivor_length, usage._survivor_region_count); |
102 | assert(usage._old_region_count == after._old_length, "Expected old to be " SIZE_FORMAT " but was " SIZE_FORMAT, |
103 | after._old_length, usage._old_region_count); |
104 | assert(usage._archive_region_count == after._archive_length, "Expected archive to be " SIZE_FORMAT " but was " SIZE_FORMAT, |
105 | after._archive_length, usage._archive_region_count); |
106 | assert(usage._humongous_region_count == after._humongous_length, "Expected humongous to be " SIZE_FORMAT " but was " SIZE_FORMAT, |
107 | after._humongous_length, usage._humongous_region_count); |
108 | } |
109 | |
110 | log_info(gc, heap)("Eden regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")" , |
111 | _before._eden_length, after._eden_length, eden_capacity_length_after_gc); |
112 | log_trace(gc, heap)(" Used: 0K, Waste: 0K" ); |
113 | |
114 | log_info(gc, heap)("Survivor regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")" , |
115 | _before._survivor_length, after._survivor_length, survivor_capacity_length_before_gc); |
116 | log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K" , |
117 | usage._survivor_used / K, ((after._survivor_length * HeapRegion::GrainBytes) - usage._survivor_used) / K); |
118 | |
119 | log_info(gc, heap)("Old regions: " SIZE_FORMAT "->" SIZE_FORMAT, |
120 | _before._old_length, after._old_length); |
121 | log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K" , |
122 | usage._old_used / K, ((after._old_length * HeapRegion::GrainBytes) - usage._old_used) / K); |
123 | |
124 | log_info(gc, heap)("Archive regions: " SIZE_FORMAT "->" SIZE_FORMAT, |
125 | _before._archive_length, after._archive_length); |
126 | log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K" , |
127 | usage._archive_used / K, ((after._archive_length * HeapRegion::GrainBytes) - usage._archive_used) / K); |
128 | |
129 | log_info(gc, heap)("Humongous regions: " SIZE_FORMAT "->" SIZE_FORMAT, |
130 | _before._humongous_length, after._humongous_length); |
131 | log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K" , |
132 | usage._humongous_used / K, ((after._humongous_length * HeapRegion::GrainBytes) - usage._humongous_used) / K); |
133 | |
134 | MetaspaceUtils::print_metaspace_change(_before._metaspace_used_bytes); |
135 | } |
136 | |