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