1 /*
2 * Copyright (c) 2003, 2012, 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 "classfile/classLoader.hpp"
27 #include "services/attachListener.hpp"
28 #include "services/management.hpp"
29 #include "services/runtimeService.hpp"
30 #include "utilities/dtrace.hpp"
31 #include "utilities/exceptions.hpp"
32
33 #ifndef USDT2
34 HS_DTRACE_PROBE_DECL(hs_private, safepoint__begin);
35 HS_DTRACE_PROBE_DECL(hs_private, safepoint__end);
36 #endif /* !USDT2 */
37
38 #if INCLUDE_MANAGEMENT
39 TimeStamp RuntimeService::_app_timer;
40 TimeStamp RuntimeService::_safepoint_timer;
41 PerfCounter* RuntimeService::_sync_time_ticks = NULL;
42 PerfCounter* RuntimeService::_total_safepoints = NULL;
43 PerfCounter* RuntimeService::_safepoint_time_ticks = NULL;
44 PerfCounter* RuntimeService::_application_time_ticks = NULL;
45 PerfCounter* RuntimeService::_thread_interrupt_signaled_count = NULL;
46 PerfCounter* RuntimeService::_interrupted_before_count = NULL;
47 PerfCounter* RuntimeService::_interrupted_during_count = NULL;
48
49 void RuntimeService::init() {
50 // Make sure the VM version is initialized
51 Abstract_VM_Version::initialize();
52
53 if (UsePerfData) {
54 EXCEPTION_MARK;
55
56 _sync_time_ticks =
57 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
58 PerfData::U_Ticks, CHECK);
59
60 _total_safepoints =
61 PerfDataManager::create_counter(SUN_RT, "safepoints",
62 PerfData::U_Events, CHECK);
63
64 _safepoint_time_ticks =
65 PerfDataManager::create_counter(SUN_RT, "safepointTime",
66 PerfData::U_Ticks, CHECK);
67
68 _application_time_ticks =
69 PerfDataManager::create_counter(SUN_RT, "applicationTime",
70 PerfData::U_Ticks, CHECK);
71
72
73 // create performance counters for jvm_version and its capabilities
74 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
75 (jlong) Abstract_VM_Version::jvm_version(), CHECK);
76
77 // I/O interruption related counters
78
79 // thread signaling via os::interrupt()
80
81 _thread_interrupt_signaled_count =
82 PerfDataManager::create_counter(SUN_RT,
83 "threadInterruptSignaled", PerfData::U_Events, CHECK);
84
85 // OS_INTRPT via "check before" in _INTERRUPTIBLE
86
87 _interrupted_before_count =
88 PerfDataManager::create_counter(SUN_RT, "interruptedBeforeIO",
89 PerfData::U_Events, CHECK);
90
91 // OS_INTRPT via "check during" in _INTERRUPTIBLE
92
93 _interrupted_during_count =
94 PerfDataManager::create_counter(SUN_RT, "interruptedDuringIO",
95 PerfData::U_Events, CHECK);
96
97 // The capabilities counter is a binary representation of the VM capabilities in string.
98 // This string respresentation simplifies the implementation of the client side
99 // to parse the value.
100 char capabilities[65];
101 size_t len = sizeof(capabilities);
102 memset((void*) capabilities, '0', len);
103 capabilities[len-1] = '\0';
104 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
105 #if INCLUDE_SERVICES
106 capabilities[1] = '1';
107 #endif // INCLUDE_SERVICES
108 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
109 capabilities, CHECK);
110 }
111 }
112
113 void RuntimeService::record_safepoint_begin() {
114 #ifndef USDT2
115 HS_DTRACE_PROBE(hs_private, safepoint__begin);
116 #else /* USDT2 */
117 HS_PRIVATE_SAFEPOINT_BEGIN();
118 #endif /* USDT2 */
119
120 // Print the time interval in which the app was executing
121 if (PrintGCApplicationConcurrentTime) {
122 gclog_or_tty->print_cr("Application time: %3.7f seconds",
123 last_application_time_sec());
124 }
125
126 // update the time stamp to begin recording safepoint time
127 _safepoint_timer.update();
128 if (UsePerfData) {
129 _total_safepoints->inc();
130 if (_app_timer.is_updated()) {
131 _application_time_ticks->inc(_app_timer.ticks_since_update());
132 }
133 }
134 }
135
136 void RuntimeService::record_safepoint_synchronized() {
137 if (UsePerfData) {
138 _sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
139 }
140 }
141
142 void RuntimeService::record_safepoint_end() {
143 #ifndef USDT2
144 HS_DTRACE_PROBE(hs_private, safepoint__end);
145 #else /* USDT2 */
146 HS_PRIVATE_SAFEPOINT_END();
147 #endif /* USDT2 */
148
149 // Print the time interval for which the app was stopped
150 // during the current safepoint operation.
151 if (PrintGCApplicationStoppedTime) {
152 gclog_or_tty->print_cr("Total time for which application threads "
153 "were stopped: %3.7f seconds",
154 last_safepoint_time_sec());
155 }
156
157 // update the time stamp to begin recording app time
158 _app_timer.update();
159 if (UsePerfData) {
160 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
161 }
162 }
163
164 void RuntimeService::record_application_start() {
165 // update the time stamp to begin recording app time
166 _app_timer.update();
167 }
168
169 // Don't need to record application end because we currently
170 // exit at a safepoint and record_safepoint_begin() handles updating
171 // the application time counter at VM exit.
172
173 jlong RuntimeService::safepoint_sync_time_ms() {
174 return UsePerfData ?
175 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
176 }
177
178 jlong RuntimeService::safepoint_count() {
179 return UsePerfData ?
180 _total_safepoints->get_value() : -1;
181 }
182 jlong RuntimeService::safepoint_time_ms() {
183 return UsePerfData ?
184 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
185 }
186
187 jlong RuntimeService::application_time_ms() {
188 return UsePerfData ?
189 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
190 }
191
192 void RuntimeService::record_interrupted_before_count() {
193 if (UsePerfData) {
194 _interrupted_before_count->inc();
195 }
196 }
197
198 void RuntimeService::record_interrupted_during_count() {
199 if (UsePerfData) {
200 _interrupted_during_count->inc();
201 }
202 }
203
204 void RuntimeService::record_thread_interrupt_signaled_count() {
205 if (UsePerfData) {
206 _thread_interrupt_signaled_count->inc();
207 }
208 }
209
210 #endif // INCLUDE_MANAGEMENT