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 // Make sure the VM version is initialized
46 Abstract_VM_Version::initialize();
47
48 if (UsePerfData) {
49 EXCEPTION_MARK;
50
51 _sync_time_ticks =
52 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
53 PerfData::U_Ticks, CHECK);
54
55 _total_safepoints =
56 PerfDataManager::create_counter(SUN_RT, "safepoints",
57 PerfData::U_Events, CHECK);
58
59 _safepoint_time_ticks =
60 PerfDataManager::create_counter(SUN_RT, "safepointTime",
61 PerfData::U_Ticks, CHECK);
62
63 _application_time_ticks =
64 PerfDataManager::create_counter(SUN_RT, "applicationTime",
65 PerfData::U_Ticks, CHECK);
66
67
68 // create performance counters for jvm_version and its capabilities
69 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
70 (jlong) Abstract_VM_Version::jvm_version(), CHECK);
71
72 // The capabilities counter is a binary representation of the VM capabilities in string.
73 // This string respresentation simplifies the implementation of the client side
74 // to parse the value.
75 char capabilities[65];
76 size_t len = sizeof(capabilities);
77 memset((void*) capabilities, '0', len);
78 capabilities[len-1] = '\0';
79 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
80 #if INCLUDE_SERVICES
81 capabilities[1] = '1';
82 #endif // INCLUDE_SERVICES
83 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
84 capabilities, CHECK);
85 }
86 }
87
88 void RuntimeService::record_safepoint_begin() {
89 HS_PRIVATE_SAFEPOINT_BEGIN();
90
91 // Print the time interval in which the app was executing
92 if (PrintGCApplicationConcurrentTime && _app_timer.is_updated()) {
93 gclog_or_tty->date_stamp(PrintGCDateStamps);
94 gclog_or_tty->stamp(PrintGCTimeStamps);
95 gclog_or_tty->print_cr("Application time: %3.7f seconds",
96 last_application_time_sec());
97 }
98
99 // update the time stamp to begin recording safepoint time
100 _safepoint_timer.update();
101 _last_safepoint_sync_time_sec = 0.0;
102 if (UsePerfData) {
103 _total_safepoints->inc();
104 if (_app_timer.is_updated()) {
105 _application_time_ticks->inc(_app_timer.ticks_since_update());
106 }
107 }
108 }
109
110 void RuntimeService::record_safepoint_synchronized() {
111 if (UsePerfData) {
112 _sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
113 }
114 if (PrintGCApplicationStoppedTime) {
115 _last_safepoint_sync_time_sec = last_safepoint_time_sec();
116 }
117 }
118
119 void RuntimeService::record_safepoint_end() {
120 HS_PRIVATE_SAFEPOINT_END();
121
122 // Print the time interval for which the app was stopped
123 // during the current safepoint operation.
124 if (PrintGCApplicationStoppedTime) {
125 gclog_or_tty->date_stamp(PrintGCDateStamps);
126 gclog_or_tty->stamp(PrintGCTimeStamps);
127 gclog_or_tty->print_cr("Total time for which application threads "
128 "were stopped: %3.7f seconds, "
129 "Stopping threads took: %3.7f seconds",
130 last_safepoint_time_sec(),
131 _last_safepoint_sync_time_sec);
132 }
133
134 // update the time stamp to begin recording app time
135 _app_timer.update();
136 if (UsePerfData) {
137 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
138 }
139 }
140
141 void RuntimeService::record_application_start() {
142 // update the time stamp to begin recording app time
143 _app_timer.update();
144 }
145
146 // Don't need to record application end because we currently
147 // exit at a safepoint and record_safepoint_begin() handles updating
148 // the application time counter at VM exit.
149
150 jlong RuntimeService::safepoint_sync_time_ms() {
151 return UsePerfData ?
152 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
153 }
154
155 jlong RuntimeService::safepoint_count() {
156 return UsePerfData ?
157 _total_safepoints->get_value() : -1;
158 }
159 jlong RuntimeService::safepoint_time_ms() {
160 return UsePerfData ?
161 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
162 }
163
164 jlong RuntimeService::application_time_ms() {
165 return UsePerfData ?
166 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
167 }
168
169 #endif // INCLUDE_MANAGEMENT