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 #ifndef USDT2 34 HS_DTRACE_PROBE_DECL(hs_private, safepoint__begin); 35 HS_DTRACE_PROBE_DECL(hs_private, safepoint__end); 36 #endif /* !USDT2 */ 37 38 TimeStamp RuntimeService::_app_timer; 39 TimeStamp RuntimeService::_safepoint_timer; 40 PerfCounter* RuntimeService::_sync_time_ticks = NULL; 41 PerfCounter* RuntimeService::_total_safepoints = NULL; 42 PerfCounter* RuntimeService::_safepoint_time_ticks = NULL; 43 PerfCounter* RuntimeService::_application_time_ticks = NULL; 44 PerfCounter* RuntimeService::_thread_interrupt_signaled_count = NULL; 45 PerfCounter* RuntimeService::_interrupted_before_count = NULL; 46 PerfCounter* RuntimeService::_interrupted_during_count = NULL; 47 48 void RuntimeService::init() { 49 // Make sure the VM version is initialized 50 Abstract_VM_Version::initialize(); 51 52 if (UsePerfData) { 53 EXCEPTION_MARK; 54 55 _sync_time_ticks = 56 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime", 57 PerfData::U_Ticks, CHECK); 58 59 _total_safepoints = 60 PerfDataManager::create_counter(SUN_RT, "safepoints", 61 PerfData::U_Events, CHECK); 62 63 _safepoint_time_ticks = 64 PerfDataManager::create_counter(SUN_RT, "safepointTime", 65 PerfData::U_Ticks, CHECK); 66 67 _application_time_ticks = 68 PerfDataManager::create_counter(SUN_RT, "applicationTime", 69 PerfData::U_Ticks, CHECK); 70 71 72 // create performance counters for jvm_version and its capabilities 73 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None, 74 (jlong) Abstract_VM_Version::jvm_version(), CHECK); 75 76 // I/O interruption related counters 77 78 // thread signaling via os::interrupt() 79 80 _thread_interrupt_signaled_count = 81 PerfDataManager::create_counter(SUN_RT, 82 "threadInterruptSignaled", PerfData::U_Events, CHECK); 83 84 // OS_INTRPT via "check before" in _INTERRUPTIBLE 85 86 _interrupted_before_count = 87 PerfDataManager::create_counter(SUN_RT, "interruptedBeforeIO", 88 PerfData::U_Events, CHECK); 89 90 // OS_INTRPT via "check during" in _INTERRUPTIBLE 91 92 _interrupted_during_count = 93 PerfDataManager::create_counter(SUN_RT, "interruptedDuringIO", 94 PerfData::U_Events, CHECK); 95 96 // The capabilities counter is a binary representation of the VM capabilities in string. 97 // This string respresentation simplifies the implementation of the client side 98 // to parse the value. 99 char capabilities[65]; 100 size_t len = sizeof(capabilities); 101 memset((void*) capabilities, '0', len); 102 capabilities[len-1] = '\0'; 103 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0'; 104 #ifdef KERNEL 105 capabilities[1] = '1'; 106 #endif // KERNEL 107 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities", 108 capabilities, CHECK); 109 } 110 } 111 112 void RuntimeService::record_safepoint_begin() { 113 #ifndef USDT2 114 HS_DTRACE_PROBE(hs_private, safepoint__begin); 115 #else /* USDT2 */ 116 HS_PRIVATE_SAFEPOINT_BEGIN(); 117 #endif /* USDT2 */ 118 119 // Print the time interval in which the app was executing 120 if (PrintGCApplicationConcurrentTime) { 121 gclog_or_tty->print_cr("Application time: %3.7f seconds", 122 last_application_time_sec()); 123 } 124 125 // update the time stamp to begin recording safepoint time 126 _safepoint_timer.update(); 127 if (UsePerfData) { 128 _total_safepoints->inc(); 129 if (_app_timer.is_updated()) { 130 _application_time_ticks->inc(_app_timer.ticks_since_update()); 131 } 132 } 133 } 134 135 void RuntimeService::record_safepoint_synchronized() { 136 if (UsePerfData) { 137 _sync_time_ticks->inc(_safepoint_timer.ticks_since_update()); 138 } 139 } 140 141 void RuntimeService::record_safepoint_end() { 142 #ifndef USDT2 143 HS_DTRACE_PROBE(hs_private, safepoint__end); 144 #else /* USDT2 */ 145 HS_PRIVATE_SAFEPOINT_END(); 146 #endif /* USDT2 */ 147 148 // Print the time interval for which the app was stopped 149 // during the current safepoint operation. 150 if (PrintGCApplicationStoppedTime) { 151 gclog_or_tty->print_cr("Total time for which application threads " 152 "were stopped: %3.7f seconds", 153 last_safepoint_time_sec()); 154 } 155 156 // update the time stamp to begin recording app time 157 _app_timer.update(); 158 if (UsePerfData) { 159 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update()); 160 } 161 } 162 163 void RuntimeService::record_application_start() { 164 // update the time stamp to begin recording app time 165 _app_timer.update(); 166 } 167 168 // Don't need to record application end because we currently 169 // exit at a safepoint and record_safepoint_begin() handles updating 170 // the application time counter at VM exit. 171 172 jlong RuntimeService::safepoint_sync_time_ms() { 173 return UsePerfData ? 174 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1; 175 } 176 177 jlong RuntimeService::safepoint_count() { 178 return UsePerfData ? 179 _total_safepoints->get_value() : -1; 180 } 181 jlong RuntimeService::safepoint_time_ms() { 182 return UsePerfData ? 183 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1; 184 } 185 186 jlong RuntimeService::application_time_ms() { 187 return UsePerfData ? 188 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1; 189 } 190 191 void RuntimeService::record_interrupted_before_count() { 192 if (UsePerfData) { 193 _interrupted_before_count->inc(); 194 } 195 } 196 197 void RuntimeService::record_interrupted_during_count() { 198 if (UsePerfData) { 199 _interrupted_during_count->inc(); 200 } 201 } 202 203 void RuntimeService::record_thread_interrupt_signaled_count() { 204 if (UsePerfData) { 205 _thread_interrupt_signaled_count->inc(); 206 } 207 }