1 /*
2 * Copyright (c) 2017, 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 #include "precompiled.hpp"
25 #include "gc/shared/generationCounters.hpp"
26 #include "gc/shared/hSpaceCounters.hpp"
27 #include "gc/z/zCollectedHeap.hpp"
28 #include "gc/z/zHeap.inline.hpp"
29 #include "gc/z/zServiceability.hpp"
30 #include "memory/metaspaceCounters.hpp"
31 #include "runtime/perfData.hpp"
32
33 class ZOldGenerationCounters : public GenerationCounters {
34 public:
35 ZOldGenerationCounters(const char* name, size_t min_capacity, size_t max_capacity) :
36 // The "1, 1" parameters are for the n-th generation (=1) with 1 space.
37 GenerationCounters(name,
38 1 /* ordinal */,
39 1 /* spaces */,
40 min_capacity /* min_capacity */,
41 max_capacity /* max_capacity */,
42 min_capacity /* curr_capacity */) {}
43
44 virtual void update_all() {
45 size_t committed = ZHeap::heap()->capacity();
46 _current_size->set_value(committed);
47 }
48 };
49
50 // Class to expose perf counters used by jstat.
51 class ZServiceabilityCounters : public CHeapObj<mtGC> {
52 private:
53 ZOldGenerationCounters _old_collection_counters;
54 HSpaceCounters _old_space_counters;
55
56 public:
57 ZServiceabilityCounters(size_t min_capacity, size_t max_capacity);
58
59 void update_sizes();
60 };
61
62 ZServiceabilityCounters::ZServiceabilityCounters(size_t min_capacity, size_t max_capacity) :
63 // generation.1
64 _old_collection_counters("old",
65 min_capacity,
66 max_capacity),
67 // generation.1.space.0
68 _old_space_counters(_old_collection_counters.name_space(),
69 "space",
70 0 /* ordinal */,
71 max_capacity /* max_capacity */,
72 min_capacity /* init_capacity */) {}
73
74 void ZServiceabilityCounters::update_sizes() {
75 if (UsePerfData) {
76 size_t capacity = ZHeap::heap()->capacity();
77 size_t used = MIN2(ZHeap::heap()->used(), capacity);
78
79 _old_space_counters.update_capacity(capacity);
80 _old_space_counters.update_used(used);
81
82 _old_collection_counters.update_all();
83
84 MetaspaceCounters::update_performance_counters();
85 CompressedClassSpaceCounters::update_performance_counters();
86 }
87 }
88
89 ZServiceabilityMemoryPool::ZServiceabilityMemoryPool(size_t min_capacity, size_t max_capacity) :
90 CollectedMemoryPool("ZHeap",
91 min_capacity,
92 max_capacity,
93 true /* support_usage_threshold */) {}
94
95 size_t ZServiceabilityMemoryPool::used_in_bytes() {
96 return ZHeap::heap()->used();
97 }
98
99 MemoryUsage ZServiceabilityMemoryPool::get_memory_usage() {
100 const size_t committed = ZHeap::heap()->capacity();
101 const size_t used = MIN2(ZHeap::heap()->used(), committed);
102
103 return MemoryUsage(initial_size(), used, committed, max_size());
104 }
105
106 ZServiceabilityMemoryManager::ZServiceabilityMemoryManager(ZServiceabilityMemoryPool* pool)
107 : GCMemoryManager("ZGC", "end of major GC") {
108 add_pool(pool);
109 }
110
111 ZServiceability::ZServiceability(size_t min_capacity, size_t max_capacity) :
112 _min_capacity(min_capacity),
113 _max_capacity(max_capacity),
114 _memory_pool(_min_capacity, _max_capacity),
115 _memory_manager(&_memory_pool),
116 _counters(NULL) {}
117
118 void ZServiceability::initialize() {
119 _counters = new ZServiceabilityCounters(_min_capacity, _max_capacity);
120 }
121
122 MemoryPool* ZServiceability::memory_pool() {
123 return &_memory_pool;
124 }
125
126 GCMemoryManager* ZServiceability::memory_manager() {
127 return &_memory_manager;
128 }
129
130 ZServiceabilityCounters* ZServiceability::counters() {
131 return _counters;
132 }
133
134 ZServiceabilityMemoryUsageTracker::~ZServiceabilityMemoryUsageTracker() {
135 MemoryService::track_memory_usage();
136 }
137
138 ZServiceabilityManagerStatsTracer::ZServiceabilityManagerStatsTracer(bool is_gc_begin, bool is_gc_end) :
139 _stats(ZHeap::heap()->serviceability_memory_manager(),
140 ZCollectedHeap::heap()->gc_cause() /* cause */,
141 is_gc_begin /* recordGCBeginTime */,
142 is_gc_begin /* recordPreGCUsage */,
143 true /* recordPeakUsage */,
144 is_gc_end /* recordPostGCusage */,
145 true /* recordAccumulatedGCTime */,
146 is_gc_end /* recordGCEndTime */,
147 is_gc_end /* countCollection */) {}
148
149 ZServiceabilityCountersTracer::ZServiceabilityCountersTracer() {
150 // Nothing to trace with TraceCollectorStats, since ZGC has
151 // neither a young collector or a full collector.
152 }
153
154 ZServiceabilityCountersTracer::~ZServiceabilityCountersTracer() {
155 ZHeap::heap()->serviceability_counters()->update_sizes();
156 }