1 /*
2 * Copyright (c) 2003, 2013, 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 #include "utilities/macros.hpp"
33
34 #ifndef USDT2
35 HS_DTRACE_PROBE_DECL(hs_private, safepoint__begin);
36 HS_DTRACE_PROBE_DECL(hs_private, safepoint__end);
37 #endif /* !USDT2 */
38
39 #if INCLUDE_MANAGEMENT
40 TimeStamp RuntimeService::_app_timer;
41 TimeStamp RuntimeService::_safepoint_timer;
42 PerfCounter* RuntimeService::_sync_time_ticks = NULL;
43 PerfCounter* RuntimeService::_total_safepoints = NULL;
44 PerfCounter* RuntimeService::_safepoint_time_ticks = NULL;
45 PerfCounter* RuntimeService::_application_time_ticks = NULL;
46 PerfCounter* RuntimeService::_thread_interrupt_signaled_count = NULL;
47 PerfCounter* RuntimeService::_interrupted_before_count = NULL;
48 PerfCounter* RuntimeService::_interrupted_during_count = NULL;
49
50 void RuntimeService::init() {
51 // Make sure the VM version is initialized
52 Abstract_VM_Version::initialize();
53
54 if (UsePerfData) {
55 EXCEPTION_MARK;
56
57 _sync_time_ticks =
58 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
59 PerfData::U_Ticks, CHECK);
60
61 _total_safepoints =
62 PerfDataManager::create_counter(SUN_RT, "safepoints",
63 PerfData::U_Events, CHECK);
64
65 _safepoint_time_ticks =
66 PerfDataManager::create_counter(SUN_RT, "safepointTime",
67 PerfData::U_Ticks, CHECK);
68
69 _application_time_ticks =
70 PerfDataManager::create_counter(SUN_RT, "applicationTime",
71 PerfData::U_Ticks, CHECK);
72
73
74 // create performance counters for jvm_version and its capabilities
75 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
76 (jlong) Abstract_VM_Version::jvm_version(), CHECK);
77
78 // I/O interruption related counters
79
80 // thread signaling via os::interrupt()
81
82 _thread_interrupt_signaled_count =
83 PerfDataManager::create_counter(SUN_RT,
84 "threadInterruptSignaled", PerfData::U_Events, CHECK);
85
86 // OS_INTRPT via "check before" in _INTERRUPTIBLE
87
88 _interrupted_before_count =
89 PerfDataManager::create_counter(SUN_RT, "interruptedBeforeIO",
90 PerfData::U_Events, CHECK);
91
92 // OS_INTRPT via "check during" in _INTERRUPTIBLE
93
94 _interrupted_during_count =
95 PerfDataManager::create_counter(SUN_RT, "interruptedDuringIO",
96 PerfData::U_Events, CHECK);
97
98 // The capabilities counter is a binary representation of the VM capabilities in string.
99 // This string respresentation simplifies the implementation of the client side
100 // to parse the value.
101 char capabilities[65];
102 size_t len = sizeof(capabilities);
103 memset((void*) capabilities, '0', len);
104 capabilities[len-1] = '\0';
105 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
106 #if INCLUDE_SERVICES
107 capabilities[1] = '1';
108 #endif // INCLUDE_SERVICES
109 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
110 capabilities, CHECK);
111 }
112 }
113
114 void RuntimeService::record_safepoint_begin() {
115 #ifndef USDT2
116 HS_DTRACE_PROBE(hs_private, safepoint__begin);
117 #else /* USDT2 */
118 HS_PRIVATE_SAFEPOINT_BEGIN();
119 #endif /* USDT2 */
120
121 // Print the time interval in which the app was executing
122 if (PrintGCApplicationConcurrentTime && _app_timer.is_updated()) {
123 gclog_or_tty->date_stamp(PrintGCDateStamps);
124 gclog_or_tty->stamp(PrintGCTimeStamps);
125 gclog_or_tty->print_cr("Application time: %3.7f seconds",
126 last_application_time_sec());
127 }
128
129 // update the time stamp to begin recording safepoint time
130 _safepoint_timer.update();
131 if (UsePerfData) {
132 _total_safepoints->inc();
133 if (_app_timer.is_updated()) {
134 _application_time_ticks->inc(_app_timer.ticks_since_update());
135 }
136 }
137 }
138
139 void RuntimeService::record_safepoint_synchronized() {
140 if (UsePerfData) {
141 _sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
142 }
143 }
144
145 void RuntimeService::record_safepoint_end() {
146 #ifndef USDT2
147 HS_DTRACE_PROBE(hs_private, safepoint__end);
148 #else /* USDT2 */
149 HS_PRIVATE_SAFEPOINT_END();
150 #endif /* USDT2 */
151
152 // Print the time interval for which the app was stopped
153 // during the current safepoint operation.
154 if (PrintGCApplicationStoppedTime) {
155 gclog_or_tty->date_stamp(PrintGCDateStamps);
156 gclog_or_tty->stamp(PrintGCTimeStamps);
157 gclog_or_tty->print_cr("Total time for which application threads "
158 "were stopped: %3.7f seconds",
159 last_safepoint_time_sec());
160 }
161
162 // update the time stamp to begin recording app time
163 _app_timer.update();
164 if (UsePerfData) {
165 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
166 }
167 }
168
169 void RuntimeService::record_application_start() {
170 // update the time stamp to begin recording app time
171 _app_timer.update();
172 }
173
174 // Don't need to record application end because we currently
175 // exit at a safepoint and record_safepoint_begin() handles updating
176 // the application time counter at VM exit.
177
178 jlong RuntimeService::safepoint_sync_time_ms() {
179 return UsePerfData ?
180 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
181 }
182
183 jlong RuntimeService::safepoint_count() {
184 return UsePerfData ?
185 _total_safepoints->get_value() : -1;
186 }
187 jlong RuntimeService::safepoint_time_ms() {
188 return UsePerfData ?
189 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
190 }
191
192 jlong RuntimeService::application_time_ms() {
193 return UsePerfData ?
194 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
195 }
196
197 void RuntimeService::record_interrupted_before_count() {
198 if (UsePerfData) {
199 _interrupted_before_count->inc();
200 }
201 }
202
203 void RuntimeService::record_interrupted_during_count() {
204 if (UsePerfData) {
205 _interrupted_during_count->inc();
206 }
207 }
208
209 void RuntimeService::record_thread_interrupt_signaled_count() {
210 if (UsePerfData) {
211 _thread_interrupt_signaled_count->inc();
212 }
213 }
214
215 #endif // INCLUDE_MANAGEMENT