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1 /* |
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2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 #include "com_sun_management_internal_OperatingSystemImpl.h" |
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27 |
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28 #include <sys/time.h> |
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29 #include <mach/mach.h> |
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30 #include <mach/task_info.h> |
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31 |
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32 #include "jvm.h" |
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33 |
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34 JNIEXPORT jdouble JNICALL |
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35 Java_com_sun_management_internal_OperatingSystemImpl_getSystemCpuLoad0 |
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36 (JNIEnv *env, jobject dummy) |
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37 { |
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38 // This code is influenced by the darwin top source |
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39 |
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40 kern_return_t kr; |
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41 mach_msg_type_number_t count; |
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42 host_cpu_load_info_data_t load; |
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43 |
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44 static jlong last_used = 0; |
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45 static jlong last_total = 0; |
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46 |
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47 count = HOST_CPU_LOAD_INFO_COUNT; |
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48 kr = host_statistics(mach_host_self(), HOST_CPU_LOAD_INFO, (host_info_t)&load, &count); |
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49 if (kr != KERN_SUCCESS) { |
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50 return -1; |
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51 } |
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52 |
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53 jlong used = load.cpu_ticks[CPU_STATE_USER] + load.cpu_ticks[CPU_STATE_NICE] + load.cpu_ticks[CPU_STATE_SYSTEM]; |
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54 jlong total = used + load.cpu_ticks[CPU_STATE_IDLE]; |
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55 |
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56 if (last_used == 0 || last_total == 0) { |
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57 // First call, just set the last values |
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58 last_used = used; |
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59 last_total = total; |
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60 // return 0 since we have no data, not -1 which indicates error |
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61 return 0; |
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62 } |
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63 |
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64 jlong used_delta = used - last_used; |
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65 jlong total_delta = total - last_total; |
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66 |
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67 jdouble cpu = (jdouble) used_delta / total_delta; |
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68 |
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69 last_used = used; |
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70 last_total = total; |
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71 |
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72 return cpu; |
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73 } |
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74 |
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75 |
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76 #define TIME_VALUE_TO_TIMEVAL(a, r) do { \ |
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77 (r)->tv_sec = (a)->seconds; \ |
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78 (r)->tv_usec = (a)->microseconds; \ |
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79 } while (0) |
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80 |
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81 |
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82 #define TIME_VALUE_TO_MICROSECONDS(TV) \ |
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83 ((TV).tv_sec * 1000 * 1000 + (TV).tv_usec) |
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84 |
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85 |
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86 JNIEXPORT jdouble JNICALL |
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87 Java_com_sun_management_internal_OperatingSystemImpl_getProcessCpuLoad0 |
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88 (JNIEnv *env, jobject dummy) |
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89 { |
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90 // This code is influenced by the darwin top source |
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91 |
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92 struct task_basic_info_64 task_info_data; |
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93 struct task_thread_times_info thread_info_data; |
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94 struct timeval user_timeval, system_timeval, task_timeval; |
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95 struct timeval now; |
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96 mach_port_t task = mach_task_self(); |
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97 kern_return_t kr; |
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98 |
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99 static jlong last_task_time = 0; |
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100 static jlong last_time = 0; |
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101 |
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102 mach_msg_type_number_t thread_info_count = TASK_THREAD_TIMES_INFO_COUNT; |
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103 kr = task_info(task, |
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104 TASK_THREAD_TIMES_INFO, |
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105 (task_info_t)&thread_info_data, |
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106 &thread_info_count); |
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107 if (kr != KERN_SUCCESS) { |
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108 // Most likely cause: |task| is a zombie. |
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109 return -1; |
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110 } |
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111 |
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112 mach_msg_type_number_t count = TASK_BASIC_INFO_64_COUNT; |
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113 kr = task_info(task, |
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114 TASK_BASIC_INFO_64, |
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115 (task_info_t)&task_info_data, |
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116 &count); |
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117 if (kr != KERN_SUCCESS) { |
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118 // Most likely cause: |task| is a zombie. |
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119 return -1; |
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120 } |
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121 |
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122 /* Set total_time. */ |
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123 // thread info contains live time... |
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124 TIME_VALUE_TO_TIMEVAL(&thread_info_data.user_time, &user_timeval); |
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125 TIME_VALUE_TO_TIMEVAL(&thread_info_data.system_time, &system_timeval); |
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126 timeradd(&user_timeval, &system_timeval, &task_timeval); |
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127 |
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128 // ... task info contains terminated time. |
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129 TIME_VALUE_TO_TIMEVAL(&task_info_data.user_time, &user_timeval); |
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130 TIME_VALUE_TO_TIMEVAL(&task_info_data.system_time, &system_timeval); |
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131 timeradd(&user_timeval, &task_timeval, &task_timeval); |
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132 timeradd(&system_timeval, &task_timeval, &task_timeval); |
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133 |
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134 if (gettimeofday(&now, NULL) < 0) { |
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135 return -1; |
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136 } |
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137 jint ncpus = JVM_ActiveProcessorCount(); |
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138 jlong time = TIME_VALUE_TO_MICROSECONDS(now) * ncpus; |
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139 jlong task_time = TIME_VALUE_TO_MICROSECONDS(task_timeval); |
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140 |
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141 if ((last_task_time == 0) || (last_time == 0)) { |
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142 // First call, just set the last values. |
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143 last_task_time = task_time; |
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144 last_time = time; |
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145 // return 0 since we have no data, not -1 which indicates error |
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146 return 0; |
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147 } |
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148 |
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149 jlong task_time_delta = task_time - last_task_time; |
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150 jlong time_delta = time - last_time; |
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151 if (time_delta == 0) { |
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152 return -1; |
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153 } |
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154 |
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155 jdouble cpu = (jdouble) task_time_delta / time_delta; |
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156 |
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157 last_task_time = task_time; |
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158 last_time = time; |
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159 |
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160 return cpu; |
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161 } |