runtimeService.cpp revision 1879:f95d63e2154a 
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.
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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
33HS_DTRACE_PROBE_DECL(hs_private, safepoint__begin);
34HS_DTRACE_PROBE_DECL(hs_private, safepoint__end);
35
36TimeStamp RuntimeService::_app_timer;
37TimeStamp RuntimeService::_safepoint_timer;
38PerfCounter*  RuntimeService::_sync_time_ticks = NULL;
39PerfCounter*  RuntimeService::_total_safepoints = NULL;
40PerfCounter*  RuntimeService::_safepoint_time_ticks = NULL;
41PerfCounter*  RuntimeService::_application_time_ticks = NULL;
42PerfCounter*  RuntimeService::_thread_interrupt_signaled_count = NULL;
43PerfCounter*  RuntimeService::_interrupted_before_count = NULL;
44PerfCounter*  RuntimeService::_interrupted_during_count = NULL;
45
46void 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
110void 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
129void RuntimeService::record_safepoint_synchronized() {
130  if (UsePerfData) {
131    _sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
132  }
133}
134
135void 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
153void 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
162jlong RuntimeService::safepoint_sync_time_ms() {
163  return UsePerfData ?
164    Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1;
165}
166
167jlong RuntimeService::safepoint_count() {
168  return UsePerfData ?
169    _total_safepoints->get_value() : -1;
170}
171jlong RuntimeService::safepoint_time_ms() {
172  return UsePerfData ?
173    Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1;
174}
175
176jlong RuntimeService::application_time_ms() {
177  return UsePerfData ?
178    Management::ticks_to_ms(_application_time_ticks->get_value()) : -1;
179}
180
181void RuntimeService::record_interrupted_before_count() {
182  if (UsePerfData) {
183    _interrupted_before_count->inc();
184  }
185}
186
187void RuntimeService::record_interrupted_during_count() {
188  if (UsePerfData) {
189    _interrupted_during_count->inc();
190  }
191}
192
193void RuntimeService::record_thread_interrupt_signaled_count() {
194  if (UsePerfData) {
195    _thread_interrupt_signaled_count->inc();
196  }
197}
198