1 /* 2 * Copyright (c) 2003, 2014, 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 #include "utilities/macros.hpp" 33 34 #if INCLUDE_MANAGEMENT 35 TimeStamp RuntimeService::_app_timer; 36 TimeStamp RuntimeService::_safepoint_timer; 37 PerfCounter* RuntimeService::_sync_time_ticks = NULL; 38 PerfCounter* RuntimeService::_total_safepoints = NULL; 39 PerfCounter* RuntimeService::_safepoint_time_ticks = NULL; 40 PerfCounter* RuntimeService::_application_time_ticks = NULL; 41 double RuntimeService::_last_safepoint_sync_time_sec = 0.0; 42 43 void RuntimeService::init() { 44 // Make sure the VM version is initialized 45 Abstract_VM_Version::initialize(); 46 47 if (UsePerfData) { 48 EXCEPTION_MARK; 49 50 _sync_time_ticks = 51 PerfDataManager::create_counter(SUN_RT, "safepointSyncTime", 52 PerfData::U_Ticks, CHECK); 53 54 _total_safepoints = 55 PerfDataManager::create_counter(SUN_RT, "safepoints", 56 PerfData::U_Events, CHECK); 57 58 _safepoint_time_ticks = 59 PerfDataManager::create_counter(SUN_RT, "safepointTime", 60 PerfData::U_Ticks, CHECK); 61 62 _application_time_ticks = 63 PerfDataManager::create_counter(SUN_RT, "applicationTime", 64 PerfData::U_Ticks, CHECK); 65 66 67 // create performance counters for jvm_version and its capabilities 68 PerfDataManager::create_constant(SUN_RT, "jvmVersion", PerfData::U_None, 69 (jlong) Abstract_VM_Version::jvm_version(), CHECK); 70 71 // The capabilities counter is a binary representation of the VM capabilities in string. 72 // This string respresentation simplifies the implementation of the client side 73 // to parse the value. 74 char capabilities[65]; 75 size_t len = sizeof(capabilities); 76 memset((void*) capabilities, '0', len); 77 capabilities[len-1] = '\0'; 78 capabilities[0] = AttachListener::is_attach_supported() ? '1' : '0'; 79 #if INCLUDE_SERVICES 80 capabilities[1] = '1'; 81 #endif // INCLUDE_SERVICES 82 PerfDataManager::create_string_constant(SUN_RT, "jvmCapabilities", 83 capabilities, CHECK); 84 } 85 } 86 87 void RuntimeService::record_safepoint_begin() { 88 HS_PRIVATE_SAFEPOINT_BEGIN(); 89 90 // Print the time interval in which the app was executing 91 if (PrintGCApplicationConcurrentTime && _app_timer.is_updated()) { 92 gclog_or_tty->date_stamp(PrintGCDateStamps); 93 gclog_or_tty->stamp(PrintGCTimeStamps); 94 gclog_or_tty->print_cr("Application time: %3.7f seconds", 95 last_application_time_sec()); 96 } 97 98 // update the time stamp to begin recording safepoint time 99 _safepoint_timer.update(); 100 _last_safepoint_sync_time_sec = 0.0; 101 if (UsePerfData) { 102 _total_safepoints->inc(); 103 if (_app_timer.is_updated()) { 104 _application_time_ticks->inc(_app_timer.ticks_since_update()); 105 } 106 } 107 } 108 109 void RuntimeService::record_safepoint_synchronized() { 110 if (UsePerfData) { 111 _sync_time_ticks->inc(_safepoint_timer.ticks_since_update()); 112 } 113 if (PrintGCApplicationStoppedTime) { 114 _last_safepoint_sync_time_sec = last_safepoint_time_sec(); 115 } 116 } 117 118 void RuntimeService::record_safepoint_end() { 119 HS_PRIVATE_SAFEPOINT_END(); 120 121 // Print the time interval for which the app was stopped 122 // during the current safepoint operation. 123 if (PrintGCApplicationStoppedTime) { 124 gclog_or_tty->date_stamp(PrintGCDateStamps); 125 gclog_or_tty->stamp(PrintGCTimeStamps); 126 gclog_or_tty->print_cr("Total time for which application threads " 127 "were stopped: %3.7f seconds, " 128 "Stopping threads took: %3.7f seconds", 129 last_safepoint_time_sec(), 130 _last_safepoint_sync_time_sec); 131 } 132 133 // update the time stamp to begin recording app time 134 _app_timer.update(); 135 if (UsePerfData) { 136 _safepoint_time_ticks->inc(_safepoint_timer.ticks_since_update()); 137 } 138 } 139 140 void RuntimeService::record_application_start() { 141 // update the time stamp to begin recording app time 142 _app_timer.update(); 143 } 144 145 // Don't need to record application end because we currently 146 // exit at a safepoint and record_safepoint_begin() handles updating 147 // the application time counter at VM exit. 148 149 jlong RuntimeService::safepoint_sync_time_ms() { 150 return UsePerfData ? 151 Management::ticks_to_ms(_sync_time_ticks->get_value()) : -1; 152 } 153 154 jlong RuntimeService::safepoint_count() { 155 return UsePerfData ? 156 _total_safepoints->get_value() : -1; 157 } 158 jlong RuntimeService::safepoint_time_ms() { 159 return UsePerfData ? 160 Management::ticks_to_ms(_safepoint_time_ticks->get_value()) : -1; 161 } 162 163 jlong RuntimeService::application_time_ms() { 164 return UsePerfData ? 165 Management::ticks_to_ms(_application_time_ticks->get_value()) : -1; 166 } 167 168 #endif // INCLUDE_MANAGEMENT