1 /*
2 * Copyright (c) 2003, 2010, 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 TimeStamp RuntimeService::_app_timer;
39 TimeStamp RuntimeService::_safepoint_timer;
40 PerfCounter* RuntimeService::_sync_time_ticks = NULL;
41 PerfCounter* RuntimeService::_total_safepoints = NULL;
42 PerfCounter* RuntimeService::_safepoint_time_ticks = NULL;
43 PerfCounter* RuntimeService::_application_time_ticks = NULL;
44 PerfCounter* RuntimeService::_thread_interrupt_signaled_count = NULL;
45 PerfCounter* RuntimeService::_interrupted_before_count = NULL;
46 PerfCounter* RuntimeService::_interrupted_during_count = NULL;
47
48 void RuntimeService::init() {
49 // Make sure the VM version is initialized
50 Abstract_VM_Version::initialize();
51
52 if (UsePerfData) {
53 EXCEPTION_MARK;
54
55 _sync_time_ticks =
56 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
57 PerfData::U_Ticks, CHECK);
58
59 _total_safepoints =
60 PerfDataManager::create_counter(SUN_RT, "safepoints",
61 PerfData::U_Events, CHECK);
62
63 _safepoint_time_ticks =
64 PerfDataManager::create_counter(SUN_RT, "safepointTime",
65 PerfData::U_Ticks, CHECK);
66
67 _application_time_ticks =
68 PerfDataManager::create_counter(SUN_RT, "applicationTime",
69 PerfData::U_Ticks, CHECK);
70
71
72 // create performance counters for jvm_version and its capabilities
73 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
74 (jlong) Abstract_VM_Version::jvm_version(), CHECK);
75
76 // I/O interruption related counters
77
78 // thread signaling via os::interrupt()
79
80 _thread_interrupt_signaled_count =
81 PerfDataManager::create_counter(SUN_RT,
82 "threadInterruptSignaled", PerfData::U_Events, CHECK);
83
84 // OS_INTRPT via "check before" in _INTERRUPTIBLE
85
86 _interrupted_before_count =
87 PerfDataManager::create_counter(SUN_RT, "interruptedBeforeIO",
88 PerfData::U_Events, CHECK);
89
90 // OS_INTRPT via "check during" in _INTERRUPTIBLE
91
92 _interrupted_during_count =
93 PerfDataManager::create_counter(SUN_RT, "interruptedDuringIO",
94 PerfData::U_Events, CHECK);
95
96 // The capabilities counter is a binary representation of the VM capabilities in string.
97 // This string respresentation simplifies the implementation of the client side
98 // to parse the value.
99 char capabilities[65];
100 size_t len = sizeof(capabilities);
101 memset((void*) capabilities, '0', len);
102 capabilities[len-1] = '\0';
103 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
104 #ifdef KERNEL
105 capabilities[1] = '1';
106 #endif // KERNEL
107 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
108 capabilities, CHECK);
109 }
110 }
111
112 void RuntimeService::record_safepoint_begin() {
113 #ifndef USDT2
114 HS_DTRACE_PROBE(hs_private, safepoint__begin);
115 #else /* USDT2 */
116 HS_PRIVATE_SAFEPOINT_BEGIN();
117 #endif /* USDT2 */
118
119 // Print the time interval in which the app was executing
120 if (PrintGCApplicationConcurrentTime) {
121 gclog_or_tty->print_cr("Application time: %3.7f seconds",
122 last_application_time_sec());
123 }
124
125 // update the time stamp to begin recording safepoint time
126 _safepoint_timer.update();
127 if (UsePerfData) {
128 _total_safepoints->inc();
129 if (_app_timer.is_updated()) {
130 _application_time_ticks->inc(_app_timer.ticks_since_update());
131 }
132 }
133 }
134
135 void RuntimeService::record_safepoint_synchronized() {
136 if (UsePerfData) {
137 _sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
138 }
139 }
140
141 void RuntimeService::record_safepoint_end() {
142 #ifndef USDT2
143 HS_DTRACE_PROBE(hs_private, safepoint__end);
144 #else /* USDT2 */
145 HS_PRIVATE_SAFEPOINT_END();
146 #endif /* USDT2 */
147
148 // Print the time interval for which the app was stopped
149 // during the current safepoint operation.
150 if (PrintGCApplicationStoppedTime) {
151 gclog_or_tty->print_cr("Total time for which application threads "
152 "were stopped: %3.7f seconds",
153 last_safepoint_time_sec());
154 }
155
156 // update the time stamp to begin recording app time
157 _app_timer.update();
158 if (UsePerfData) {
159 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
160 }
161 }
162
163 void RuntimeService::record_application_start() {
164 // update the time stamp to begin recording app time
165 _app_timer.update();
166 }
167
168 // Don't need to record application end because we currently
169 // exit at a safepoint and record_safepoint_begin() handles updating
170 // the application time counter at VM exit.
171
172 jlong RuntimeService::safepoint_sync_time_ms() {
173 return UsePerfData ?
174 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
175 }
176
177 jlong RuntimeService::safepoint_count() {
178 return UsePerfData ?
179 _total_safepoints->get_value() : -1;
180 }
181 jlong RuntimeService::safepoint_time_ms() {
182 return UsePerfData ?
183 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
184 }
185
186 jlong RuntimeService::application_time_ms() {
187 return UsePerfData ?
188 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
189 }
190
191 void RuntimeService::record_interrupted_before_count() {
192 if (UsePerfData) {
193 _interrupted_before_count->inc();
194 }
195 }
196
197 void RuntimeService::record_interrupted_during_count() {
198 if (UsePerfData) {
199 _interrupted_during_count->inc();
200 }
201 }
202
203 void RuntimeService::record_thread_interrupt_signaled_count() {
204 if (UsePerfData) {
205 _thread_interrupt_signaled_count->inc();
206 }
207 }