1 /*
2 * Copyright (c) 2003, 2015, 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 "runtime/vm_version.hpp"
28 #include "services/attachListener.hpp"
29 #include "services/management.hpp"
30 #include "services/runtimeService.hpp"
31 #include "utilities/dtrace.hpp"
32 #include "utilities/exceptions.hpp"
33 #include "utilities/macros.hpp"
34
35 #if INCLUDE_MANAGEMENT
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 double RuntimeService::_last_safepoint_sync_time_sec = 0.0;
43
44 void RuntimeService::init() {
45
46 if (UsePerfData) {
47 EXCEPTION_MARK;
48
49 _sync_time_ticks =
50 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
51 PerfData::U_Ticks, CHECK);
52
53 _total_safepoints =
54 PerfDataManager::create_counter(SUN_RT, "safepoints",
55 PerfData::U_Events, CHECK);
56
57 _safepoint_time_ticks =
58 PerfDataManager::create_counter(SUN_RT, "safepointTime",
59 PerfData::U_Ticks, CHECK);
60
61 _application_time_ticks =
62 PerfDataManager::create_counter(SUN_RT, "applicationTime",
63 PerfData::U_Ticks, CHECK);
64
65
66 // create performance counters for jvm_version and its capabilities
67 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
68 (jlong) Abstract_VM_Version::jvm_version(), CHECK);
69
70 // The capabilities counter is a binary representation of the VM capabilities in string.
71 // This string respresentation simplifies the implementation of the client side
72 // to parse the value.
73 char capabilities[65];
74 size_t len = sizeof(capabilities);
75 memset((void*) capabilities, '0', len);
76 capabilities[len-1] = '\0';
77 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
78 #if INCLUDE_SERVICES
79 capabilities[1] = '1';
80 #endif // INCLUDE_SERVICES
81 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
82 capabilities, CHECK);
83 }
84 }
85
86 void RuntimeService::record_safepoint_begin() {
87 HS_PRIVATE_SAFEPOINT_BEGIN();
88
89 // Print the time interval in which the app was executing
90 if (PrintGCApplicationConcurrentTime && _app_timer.is_updated()) {
91 gclog_or_tty->date_stamp(PrintGCDateStamps);
92 gclog_or_tty->stamp(PrintGCTimeStamps);
93 gclog_or_tty->print_cr("Application time: %3.7f seconds",
94 last_application_time_sec());
95 }
96
97 // update the time stamp to begin recording safepoint time
98 _safepoint_timer.update();
99 _last_safepoint_sync_time_sec = 0.0;
100 if (UsePerfData) {
101 _total_safepoints->inc();
102 if (_app_timer.is_updated()) {
103 _application_time_ticks->inc(_app_timer.ticks_since_update());
104 }
105 }
106 }
107
108 void RuntimeService::record_safepoint_synchronized() {
109 if (UsePerfData) {
110 _sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
111 }
112 if (PrintGCApplicationStoppedTime) {
113 _last_safepoint_sync_time_sec = last_safepoint_time_sec();
114 }
115 }
116
117 void RuntimeService::record_safepoint_end() {
118 HS_PRIVATE_SAFEPOINT_END();
119
120 // Print the time interval for which the app was stopped
121 // during the current safepoint operation.
122 if (PrintGCApplicationStoppedTime) {
123 gclog_or_tty->date_stamp(PrintGCDateStamps);
124 gclog_or_tty->stamp(PrintGCTimeStamps);
125 gclog_or_tty->print_cr("Total time for which application threads "
126 "were stopped: %3.7f seconds, "
127 "Stopping threads took: %3.7f seconds",
128 last_safepoint_time_sec(),
129 _last_safepoint_sync_time_sec);
130 }
131
132 // update the time stamp to begin recording app time
133 _app_timer.update();
134 if (UsePerfData) {
135 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
136 }
137 }
138
139 void RuntimeService::record_application_start() {
140 // update the time stamp to begin recording app time
141 _app_timer.update();
142 }
143
144 // Don't need to record application end because we currently
145 // exit at a safepoint and record_safepoint_begin() handles updating
146 // the application time counter at VM exit.
147
148 jlong RuntimeService::safepoint_sync_time_ms() {
149 return UsePerfData ?
150 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
151 }
152
153 jlong RuntimeService::safepoint_count() {
154 return UsePerfData ?
155 _total_safepoints->get_value() : -1;
156 }
157 jlong RuntimeService::safepoint_time_ms() {
158 return UsePerfData ?
159 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
160 }
161
162 jlong RuntimeService::application_time_ms() {
163 return UsePerfData ?
164 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
165 }
166
167 #endif // INCLUDE_MANAGEMENT