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 "logging/log.hpp"
28 #include "runtime/vm_version.hpp"
29 #include "services/attachListener.hpp"
30 #include "services/management.hpp"
31 #include "services/runtimeService.hpp"
32 #include "utilities/dtrace.hpp"
33 #include "utilities/exceptions.hpp"
34 #include "utilities/macros.hpp"
35
36 #if INCLUDE_MANAGEMENT
37 TimeStamp RuntimeService::_app_timer;
38 TimeStamp RuntimeService::_safepoint_timer;
39 PerfCounter* RuntimeService::_sync_time_ticks = NULL;
40 PerfCounter* RuntimeService::_total_safepoints = NULL;
41 PerfCounter* RuntimeService::_safepoint_time_ticks = NULL;
42 PerfCounter* RuntimeService::_application_time_ticks = NULL;
43 double RuntimeService::_last_safepoint_sync_time_sec = 0.0;
44
45 void RuntimeService::init() {
46 // Make sure the VM version is initialized
47 Abstract_VM_Version::initialize();
48
49 if (UsePerfData) {
50 EXCEPTION_MARK;
51
52 _sync_time_ticks =
53 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime",
54 PerfData::U_Ticks, CHECK);
55
56 _total_safepoints =
57 PerfDataManager::create_counter(SUN_RT, "safepoints",
58 PerfData::U_Events, CHECK);
59
60 _safepoint_time_ticks =
61 PerfDataManager::create_counter(SUN_RT, "safepointTime",
62 PerfData::U_Ticks, CHECK);
63
64 _application_time_ticks =
65 PerfDataManager::create_counter(SUN_RT, "applicationTime",
66 PerfData::U_Ticks, CHECK);
67
68
69 // create performance counters for jvm_version and its capabilities
70 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None,
71 (jlong) Abstract_VM_Version::jvm_version(), CHECK);
72
73 // The capabilities counter is a binary representation of the VM capabilities in string.
74 // This string respresentation simplifies the implementation of the client side
75 // to parse the value.
76 char capabilities[65];
77 size_t len = sizeof(capabilities);
78 memset((void*) capabilities, '0', len);
79 capabilities[len-1] = '\0';
80 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0';
81 #if INCLUDE_SERVICES
82 capabilities[1] = '1';
83 #endif // INCLUDE_SERVICES
84 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities",
85 capabilities, CHECK);
86 }
87 }
88
89 void RuntimeService::record_safepoint_begin() {
90 HS_PRIVATE_SAFEPOINT_BEGIN();
91
92 // Print the time interval in which the app was executing
93 if (_app_timer.is_updated()) {
94 log_info(safepoint)("Application time: %3.7f seconds", 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 (log_is_enabled(Info, safepoint)) {
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 log_info(safepoint)("Total time for which application threads were stopped: %3.7f seconds, Stopping threads took: %3.7f seconds",
123 last_safepoint_time_sec(), _last_safepoint_sync_time_sec);
124
125 // update the time stamp to begin recording app time
126 _app_timer.update();
127 if (UsePerfData) {
128 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update());
129 }
130 }
131
132 void RuntimeService::record_application_start() {
133 // update the time stamp to begin recording app time
134 _app_timer.update();
135 }
136
137 // Don't need to record application end because we currently
138 // exit at a safepoint and record_safepoint_begin() handles updating
139 // the application time counter at VM exit.
140
141 jlong RuntimeService::safepoint_sync_time_ms() {
142 return UsePerfData ?
143 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
144 }
145
146 jlong RuntimeService::safepoint_count() {
147 return UsePerfData ?
148 _total_safepoints->get_value() : -1;
149 }
150 jlong RuntimeService::safepoint_time_ms() {
151 return UsePerfData ?
152 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
153 }
154
155 jlong RuntimeService::application_time_ms() {
156 return UsePerfData ?
157 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
158 }
159
160 #endif // INCLUDE_MANAGEMENT