1 /* |
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2 * Copyright (c) 2003, 2011, 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 "jni.h" |
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27 #include "jni_util.h" |
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28 #include "jlong.h" |
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29 #include "jvm.h" |
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30 #include "management.h" |
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31 #include "com_sun_management_OperatingSystem.h" |
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32 |
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33 #include <psapi.h> |
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34 #include <errno.h> |
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35 #include <stdlib.h> |
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36 |
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37 #include <malloc.h> |
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38 #pragma warning (push,0) |
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39 #include <windows.h> |
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40 #pragma warning (pop) |
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41 #include <stdio.h> |
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42 #include <time.h> |
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43 #include <stdint.h> |
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44 #include <assert.h> |
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45 |
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46 /* Disable warnings due to broken header files from Microsoft... */ |
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47 #pragma warning(push, 3) |
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48 #include <pdh.h> |
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49 #include <pdhmsg.h> |
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50 #include <process.h> |
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51 #pragma warning(pop) |
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52 |
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53 typedef unsigned __int32 juint; |
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54 typedef unsigned __int64 julong; |
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55 |
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56 typedef enum boolean_values { false=0, true=1}; |
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57 |
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58 static void set_low(jlong* value, jint low) { |
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59 *value &= (jlong)0xffffffff << 32; |
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60 *value |= (jlong)(julong)(juint)low; |
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61 } |
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62 |
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63 static void set_high(jlong* value, jint high) { |
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64 *value &= (jlong)(julong)(juint)0xffffffff; |
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65 *value |= (jlong)high << 32; |
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66 } |
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67 |
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68 static jlong jlong_from(jint h, jint l) { |
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69 jlong result = 0; // initialization to avoid warning |
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70 set_high(&result, h); |
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71 set_low(&result, l); |
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72 return result; |
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73 } |
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74 |
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75 static HANDLE main_process; |
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76 |
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77 int perfiInit(void); |
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78 |
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79 JNIEXPORT void JNICALL |
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80 Java_com_sun_management_OperatingSystem_initialize |
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81 (JNIEnv *env, jclass cls) |
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82 { |
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83 main_process = GetCurrentProcess(); |
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84 perfiInit(); |
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85 } |
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86 |
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87 JNIEXPORT jlong JNICALL |
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88 Java_com_sun_management_OperatingSystem_getCommittedVirtualMemorySize0 |
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89 (JNIEnv *env, jobject mbean) |
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90 { |
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91 PROCESS_MEMORY_COUNTERS pmc; |
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92 if (GetProcessMemoryInfo(main_process, &pmc, sizeof(PROCESS_MEMORY_COUNTERS)) == 0) { |
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93 return (jlong)-1L; |
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94 } else { |
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95 return (jlong) pmc.PagefileUsage; |
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96 } |
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97 } |
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98 |
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99 JNIEXPORT jlong JNICALL |
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100 Java_com_sun_management_OperatingSystem_getTotalSwapSpaceSize |
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101 (JNIEnv *env, jobject mbean) |
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102 { |
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103 MEMORYSTATUSEX ms; |
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104 ms.dwLength = sizeof(ms); |
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105 GlobalMemoryStatusEx(&ms); |
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106 return (jlong) ms.ullTotalPageFile; |
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107 } |
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108 |
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109 JNIEXPORT jlong JNICALL |
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110 Java_com_sun_management_OperatingSystem_getFreeSwapSpaceSize |
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111 (JNIEnv *env, jobject mbean) |
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112 { |
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113 MEMORYSTATUSEX ms; |
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114 ms.dwLength = sizeof(ms); |
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115 GlobalMemoryStatusEx(&ms); |
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116 return (jlong) ms.ullAvailPageFile; |
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117 } |
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118 |
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119 JNIEXPORT jlong JNICALL |
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120 Java_com_sun_management_OperatingSystem_getProcessCpuTime |
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121 (JNIEnv *env, jobject mbean) |
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122 { |
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123 |
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124 FILETIME process_creation_time, process_exit_time, |
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125 process_user_time, process_kernel_time; |
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126 |
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127 // Using static variables declared above |
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128 // Units are 100-ns intervals. Convert to ns. |
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129 GetProcessTimes(main_process, &process_creation_time, |
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130 &process_exit_time, |
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131 &process_kernel_time, &process_user_time); |
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132 return (jlong_from(process_user_time.dwHighDateTime, |
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133 process_user_time.dwLowDateTime) + |
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134 jlong_from(process_kernel_time.dwHighDateTime, |
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135 process_kernel_time.dwLowDateTime)) * 100; |
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136 } |
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137 |
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138 JNIEXPORT jlong JNICALL |
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139 Java_com_sun_management_OperatingSystem_getFreePhysicalMemorySize |
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140 (JNIEnv *env, jobject mbean) |
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141 { |
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142 MEMORYSTATUSEX ms; |
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143 ms.dwLength = sizeof(ms); |
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144 GlobalMemoryStatusEx(&ms); |
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145 return (jlong) ms.ullAvailPhys; |
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146 } |
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147 |
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148 JNIEXPORT jlong JNICALL |
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149 Java_com_sun_management_OperatingSystem_getTotalPhysicalMemorySize |
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150 (JNIEnv *env, jobject mbean) |
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151 { |
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152 MEMORYSTATUSEX ms; |
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153 ms.dwLength = sizeof(ms); |
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154 GlobalMemoryStatusEx(&ms); |
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155 return (jlong) ms.ullTotalPhys; |
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156 } |
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157 |
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158 // Seems WinXP PDH returns PDH_MORE_DATA whenever we send in a NULL buffer. |
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159 // Let's just ignore it, since we make sure we have enough buffer anyway. |
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160 static int |
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161 pdh_fail(PDH_STATUS pdhStat) { |
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162 return pdhStat != ERROR_SUCCESS && pdhStat != PDH_MORE_DATA; |
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163 } |
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164 |
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165 // INFO: Using PDH APIs Correctly in a Localized Language (Q287159) |
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166 // http://support.microsoft.com/default.aspx?scid=kb;EN-US;q287159 |
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167 // The index value for the base system counters and objects like processor, |
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168 // process, thread, memory, and so forth are always the same irrespective |
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169 // of the localized version of the operating system or service pack installed. |
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170 #define PDH_PROCESSOR_IDX ((DWORD) 238) |
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171 #define PDH_PROCESSOR_TIME_IDX ((DWORD) 6) |
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172 #define PDH_PRIV_PROCESSOR_TIME_IDX ((DWORD) 144) |
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173 #define PDH_PROCESS_IDX ((DWORD) 230) |
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174 #define PDH_ID_PROCESS_IDX ((DWORD) 784) |
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175 #define PDH_CONTEXT_SWITCH_RATE_IDX ((DWORD) 146) |
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176 #define PDH_SYSTEM_IDX ((DWORD) 2) |
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177 #define PDH_VIRTUAL_BYTES_IDX ((DWORD) 174) |
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178 |
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179 typedef PDH_STATUS (WINAPI *PdhAddCounterFunc)( |
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180 HQUERY hQuery, |
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181 LPCSTR szFullCounterPath, |
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182 DWORD dwUserData, |
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183 HCOUNTER *phCounter |
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184 ); |
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185 typedef PDH_STATUS (WINAPI *PdhOpenQueryFunc)( |
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186 LPCWSTR szDataSource, |
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187 DWORD dwUserData, |
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188 HQUERY *phQuery |
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189 ); |
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190 typedef DWORD (WINAPI *PdhCloseQueryFunc)( |
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191 HQUERY hQuery |
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192 ); |
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193 typedef PDH_STATUS (WINAPI *PdhCollectQueryDataFunc)( |
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194 HQUERY hQuery |
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195 ); |
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196 typedef DWORD (WINAPI *PdhGetFormattedCounterValueFunc)( |
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197 HCOUNTER hCounter, |
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198 DWORD dwFormat, |
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199 LPDWORD lpdwType, |
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200 PPDH_FMT_COUNTERVALUE pValue |
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201 ); |
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202 typedef PDH_STATUS (WINAPI *PdhEnumObjectItemsFunc)( |
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203 LPCTSTR szDataSource, |
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204 LPCTSTR szMachineName, |
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205 LPCTSTR szObjectName, |
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206 LPTSTR mszCounterList, |
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207 LPDWORD pcchCounterListLength, |
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208 LPTSTR mszInstanceList, |
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209 LPDWORD pcchInstanceListLength, |
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210 DWORD dwDetailLevel, |
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211 DWORD dwFlags |
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212 ); |
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213 typedef PDH_STATUS (WINAPI *PdhRemoveCounterFunc)( |
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214 HCOUNTER hCounter |
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215 ); |
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216 typedef PDH_STATUS (WINAPI *PdhLookupPerfNameByIndexFunc)( |
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217 LPCSTR szMachineName, |
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218 DWORD dwNameIndex, |
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219 LPSTR szNameBuffer, |
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220 LPDWORD pcchNameBufferSize |
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221 ); |
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222 typedef PDH_STATUS (WINAPI *PdhMakeCounterPathFunc)( |
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223 PDH_COUNTER_PATH_ELEMENTS *pCounterPathElements, |
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224 LPTSTR szFullPathBuffer, |
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225 LPDWORD pcchBufferSize, |
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226 DWORD dwFlags |
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227 ); |
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228 |
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229 static PdhAddCounterFunc PdhAddCounter_i; |
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230 static PdhOpenQueryFunc PdhOpenQuery_i; |
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231 static PdhCloseQueryFunc PdhCloseQuery_i; |
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232 static PdhCollectQueryDataFunc PdhCollectQueryData_i; |
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233 static PdhGetFormattedCounterValueFunc PdhGetFormattedCounterValue_i; |
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234 static PdhEnumObjectItemsFunc PdhEnumObjectItems_i; |
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235 static PdhRemoveCounterFunc PdhRemoveCounter_i; |
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236 static PdhLookupPerfNameByIndexFunc PdhLookupPerfNameByIndex_i; |
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237 static PdhMakeCounterPathFunc PdhMakeCounterPath_i; |
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238 |
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239 static HANDLE thisProcess; |
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240 static double cpuFactor; |
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241 static DWORD num_cpus; |
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242 |
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243 #define FT2JLONG(X) ((((jlong)X.dwHighDateTime) << 32) | ((jlong)X.dwLowDateTime)) |
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244 #define COUNTER_BUF_SIZE 256 |
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245 // Min time between query updates. |
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246 #define MIN_UPDATE_INTERVAL 500 |
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247 #define CONFIG_SUCCESSFUL 0 |
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248 |
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249 /** |
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250 * Struct for PDH queries. |
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251 */ |
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252 typedef struct { |
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253 HQUERY query; |
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254 uint64_t lastUpdate; // Last time query was updated (current millis). |
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255 } UpdateQueryS, *UpdateQueryP; |
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256 |
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257 /** |
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258 * Struct for the processor load counters. |
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259 */ |
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260 typedef struct { |
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261 UpdateQueryS query; |
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262 HCOUNTER* counters; |
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263 int noOfCounters; |
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264 } MultipleCounterQueryS, *MultipleCounterQueryP; |
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265 |
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266 /** |
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267 * Struct for the jvm process load counter. |
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268 */ |
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269 typedef struct { |
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270 UpdateQueryS query; |
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271 HCOUNTER counter; |
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272 } SingleCounterQueryS, *SingleCounterQueryP; |
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273 |
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274 static char* getProcessPDHHeader(void); |
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275 |
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276 /** |
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277 * Currently available counters. |
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278 */ |
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279 static SingleCounterQueryS cntCtxtSwitchRate; |
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280 static SingleCounterQueryS cntVirtualSize; |
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281 static SingleCounterQueryS cntProcLoad; |
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282 static SingleCounterQueryS cntProcSystemLoad; |
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283 static MultipleCounterQueryS multiCounterCPULoad; |
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284 |
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285 static CRITICAL_SECTION processHeaderLock; |
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286 static CRITICAL_SECTION initializationLock; |
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287 |
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288 /** |
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289 * Initialize the perf module at startup. |
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290 */ |
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291 int |
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292 perfiInit(void) |
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293 { |
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294 InitializeCriticalSection(&processHeaderLock); |
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295 InitializeCriticalSection(&initializationLock); |
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296 return 0; |
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297 } |
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298 |
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299 /** |
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300 * Dynamically sets up function pointers to the PDH library. |
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301 * |
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302 * @return CONFIG_SUCCESSFUL on success, negative on failure. |
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303 */ |
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304 static int |
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305 get_functions(HMODULE h, char *ebuf, size_t elen) { |
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306 // The 'A' at the end means the ANSI (not the UNICODE) vesions of the methods |
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307 PdhAddCounter_i = (PdhAddCounterFunc)GetProcAddress(h, "PdhAddCounterA"); |
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308 PdhOpenQuery_i = (PdhOpenQueryFunc)GetProcAddress(h, "PdhOpenQueryA"); |
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309 PdhCloseQuery_i = (PdhCloseQueryFunc)GetProcAddress(h, "PdhCloseQuery"); |
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310 PdhCollectQueryData_i = (PdhCollectQueryDataFunc)GetProcAddress(h, "PdhCollectQueryData"); |
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311 PdhGetFormattedCounterValue_i = (PdhGetFormattedCounterValueFunc)GetProcAddress(h, "PdhGetFormattedCounterValue"); |
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312 PdhEnumObjectItems_i = (PdhEnumObjectItemsFunc)GetProcAddress(h, "PdhEnumObjectItemsA"); |
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313 PdhRemoveCounter_i = (PdhRemoveCounterFunc)GetProcAddress(h, "PdhRemoveCounter"); |
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314 PdhLookupPerfNameByIndex_i = (PdhLookupPerfNameByIndexFunc)GetProcAddress(h, "PdhLookupPerfNameByIndexA"); |
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315 PdhMakeCounterPath_i = (PdhMakeCounterPathFunc)GetProcAddress(h, "PdhMakeCounterPathA"); |
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316 |
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317 if (PdhAddCounter_i == NULL || PdhOpenQuery_i == NULL || |
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318 PdhCloseQuery_i == NULL || PdhCollectQueryData_i == NULL || |
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319 PdhGetFormattedCounterValue_i == NULL || PdhEnumObjectItems_i == NULL || |
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320 PdhRemoveCounter_i == NULL || PdhLookupPerfNameByIndex_i == NULL || PdhMakeCounterPath_i == NULL) |
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321 { |
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322 _snprintf(ebuf, elen, "Required method could not be found."); |
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323 return -1; |
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324 } |
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325 return CONFIG_SUCCESSFUL; |
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326 } |
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327 |
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328 /** |
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329 * Returns the counter value as a double for the specified query. |
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330 * Will collect the query data and update the counter values as necessary. |
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331 * |
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332 * @param query the query to update (if needed). |
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333 * @param c the counter to read. |
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334 * @param value where to store the formatted value. |
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335 * @param format the format to use (i.e. PDH_FMT_DOUBLE, PDH_FMT_LONG etc) |
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336 * @return CONFIG_SUCCESSFUL if no error |
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337 * -1 if PdhCollectQueryData fails |
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338 * -2 if PdhGetFormattedCounterValue fails |
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339 */ |
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340 static int |
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341 getPerformanceData(UpdateQueryP query, HCOUNTER c, PDH_FMT_COUNTERVALUE* value, DWORD format) { |
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342 clock_t now; |
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343 now = clock(); |
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344 |
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345 // Need to limit how often we update the query |
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346 // to mimise the heisenberg effect. |
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347 // (PDH behaves erratically if the counters are |
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348 // queried too often, especially counters that |
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349 // store and use values from two consecutive updates, |
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350 // like cpu load.) |
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351 if (now - query->lastUpdate > MIN_UPDATE_INTERVAL) { |
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352 if (PdhCollectQueryData_i(query->query) != ERROR_SUCCESS) { |
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353 return -1; |
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354 } |
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355 query->lastUpdate = now; |
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356 } |
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357 |
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358 if (PdhGetFormattedCounterValue_i(c, format, NULL, value) != ERROR_SUCCESS) { |
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359 return -2; |
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360 } |
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361 return CONFIG_SUCCESSFUL; |
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362 } |
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363 |
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364 /** |
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365 * Places the resolved counter name of the counter at the specified index in the |
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366 * supplied buffer. There must be enough space in the buffer to hold the counter name. |
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367 * |
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368 * @param index the counter index as specified in the registry. |
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369 * @param buf the buffer in which to place the counter name. |
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370 * @param size the size of the counter name buffer. |
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371 * @param ebuf the error message buffer. |
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372 * @param elen the length of the error buffer. |
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373 * @return CONFIG_SUCCESSFUL if successful, negative on failure. |
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374 */ |
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375 static int |
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376 find_name(DWORD index, char *buf, DWORD size) { |
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377 PDH_STATUS res; |
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378 |
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379 if ((res = PdhLookupPerfNameByIndex_i(NULL, index, buf, &size)) != ERROR_SUCCESS) { |
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380 |
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381 /* printf("Could not open counter %d: error=0x%08x", index, res); */ |
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382 /* if (res == PDH_CSTATUS_NO_MACHINE) { */ |
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383 /* printf("User probably does not have sufficient privileges to use"); */ |
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384 /* printf("performance counters. If you are running on Windows 2003"); */ |
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385 /* printf("or Windows Vista, make sure the user is in the"); */ |
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386 /* printf("Performance Logs user group."); */ |
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387 /* } */ |
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388 return -1; |
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389 } |
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390 |
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391 if (size == 0) { |
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392 /* printf("Failed to get counter name for %d: empty string", index); */ |
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393 return -1; |
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394 } |
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395 |
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396 // windows vista does not null-terminate the string (allthough the docs says it will) |
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397 buf[size - 1] = '\0'; |
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398 return CONFIG_SUCCESSFUL; |
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399 } |
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400 |
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401 /** |
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402 * Sets up the supplied SingleCounterQuery to listen for the specified counter. |
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403 * initPDH() must have been run prior to calling this function! |
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404 * |
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405 * @param counterQuery the counter query to set up. |
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406 * @param counterString the string specifying the path to the counter. |
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407 * @param ebuf the error buffer. |
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408 * @param elen the length of the error buffer. |
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409 * @returns CONFIG_SUCCESSFUL if successful, negative on failure. |
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410 */ |
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411 static int |
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412 initSingleCounterQuery(SingleCounterQueryP counterQuery, char *counterString) { |
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413 if (PdhOpenQuery_i(NULL, 0, &counterQuery->query.query) != ERROR_SUCCESS) { |
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414 /* printf("Could not open query for %s", counterString); */ |
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415 return -1; |
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416 } |
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417 if (PdhAddCounter_i(counterQuery->query.query, counterString, 0, &counterQuery->counter) != ERROR_SUCCESS) { |
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418 /* printf("Could not add counter %s for query", counterString); */ |
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419 if (counterQuery->counter != NULL) { |
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420 PdhRemoveCounter_i(counterQuery->counter); |
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421 } |
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422 if (counterQuery->query.query != NULL) { |
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423 PdhCloseQuery_i(counterQuery->query.query); |
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424 } |
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425 memset(counterQuery, 0, sizeof(SingleCounterQueryS)); |
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426 return -1; |
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427 } |
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428 return CONFIG_SUCCESSFUL; |
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429 } |
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430 |
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431 /** |
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432 * Sets up the supplied SingleCounterQuery to listen for the time spent |
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433 * by the HotSpot process. |
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434 * |
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435 * @param counterQuery the counter query to set up as a process counter. |
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436 * @param ebuf the error buffer. |
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437 * @param elen the length of the error buffer. |
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438 * @returns CONFIG_SUCCESSFUL if successful, negative on failure. |
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439 */ |
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440 static int |
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441 initProcLoadCounter(void) { |
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442 char time[COUNTER_BUF_SIZE]; |
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443 char counter[COUNTER_BUF_SIZE*2]; |
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444 |
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445 if (find_name(PDH_PROCESSOR_TIME_IDX, time, sizeof(time)-1) < 0) { |
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446 return -1; |
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447 } |
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448 _snprintf(counter, sizeof(counter)-1, "%s\\%s", getProcessPDHHeader(), time); |
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449 return initSingleCounterQuery(&cntProcLoad, counter); |
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450 } |
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451 |
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452 static int |
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453 initProcSystemLoadCounter(void) { |
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454 char time[COUNTER_BUF_SIZE]; |
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455 char counter[COUNTER_BUF_SIZE*2]; |
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456 |
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457 if (find_name(PDH_PRIV_PROCESSOR_TIME_IDX, time, sizeof(time)-1) < 0) { |
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458 return -1; |
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459 } |
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460 _snprintf(counter, sizeof(counter)-1, "%s\\%s", getProcessPDHHeader(), time); |
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461 return initSingleCounterQuery(&cntProcSystemLoad, counter); |
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462 } |
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463 |
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464 /** |
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465 * Sets up the supplied MultipleCounterQuery to check on the processors. |
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466 * (Comment: Refactor and prettify as with the the SingleCounter queries |
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467 * if more MultipleCounterQueries are discovered.) |
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468 * |
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469 * initPDH() must have been run prior to calling this function. |
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470 * |
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471 * @param multiQuery a pointer to a MultipleCounterQueryS, will be filled in with |
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472 * the necessary info to check the PDH processor counters. |
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473 * @return CONFIG_SUCCESSFUL if successful, negative on failure. |
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474 */ |
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475 static int |
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476 initProcessorCounters(void) { |
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477 char processor[COUNTER_BUF_SIZE]; //'Processor' == #238 |
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478 char time[COUNTER_BUF_SIZE]; //'Time' == 6 |
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479 DWORD c_size, i_size; |
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480 HQUERY tmpQuery; |
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481 DWORD i, p_count; |
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482 BOOL error; |
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483 char *instances, *tmp; |
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484 PDH_STATUS pdhStat; |
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485 |
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486 c_size = i_size = 0; |
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487 tmpQuery = NULL; |
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488 error = false; |
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489 |
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490 // This __try / __except stuff is there since Windows 2000 beta (or so) sometimes triggered |
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491 // an access violation when the user had insufficient privileges to use the performance |
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492 // counters. This was previously guarded by a very ugly piece of code which disabled the |
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493 // global trap handling in JRockit. Don't know if this really is needed anymore, but otoh, |
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494 // if we keep it we don't crash on Win2k beta. /Ihse, 2005-05-30 |
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495 __try { |
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496 if (find_name(PDH_PROCESSOR_IDX, processor, sizeof(processor)-1) < 0) { |
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497 return -1; |
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498 } |
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499 } __except (EXCEPTION_EXECUTE_HANDLER) { // We'll catch all exceptions here. |
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500 /* printf("User does not have sufficient privileges to use performance counters"); */ |
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501 return -1; |
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502 } |
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503 |
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504 if (find_name(PDH_PROCESSOR_TIME_IDX, time, sizeof(time)-1) < 0) { |
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505 return -1; |
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506 } |
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507 //ok, now we have enough to enumerate all processors. |
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508 pdhStat = PdhEnumObjectItems_i ( |
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509 NULL, // reserved |
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510 NULL, // local machine |
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511 processor, // object to enumerate |
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512 NULL, // pass in NULL buffers |
|
513 &c_size, // and 0 length to get |
|
514 NULL, // required size |
|
515 &i_size, // of the buffers in chars |
|
516 PERF_DETAIL_WIZARD, // counter detail level |
|
517 0); |
|
518 if (pdh_fail(pdhStat)) { |
|
519 /* printf("could not enumerate processors (1) error=%d", pdhStat); */ |
|
520 return -1; |
|
521 } |
|
522 |
|
523 // use calloc because windows vista does not null terminate the instance names (allthough the docs says it will) |
|
524 instances = calloc(i_size, 1); |
|
525 if (instances == NULL) { |
|
526 /* printf("could not allocate memory (1) %d bytes", i_size); */ |
|
527 error = true; |
|
528 goto end; |
|
529 } |
|
530 |
|
531 c_size = 0; |
|
532 pdhStat = PdhEnumObjectItems_i ( |
|
533 NULL, // reserved |
|
534 NULL, // local machine |
|
535 processor, // object to enumerate |
|
536 NULL, // pass in NULL buffers |
|
537 &c_size, // and 0 length to get |
|
538 instances, // required size |
|
539 &i_size, // of the buffers in chars |
|
540 PERF_DETAIL_WIZARD, // counter detail level |
|
541 0); |
|
542 |
|
543 if (pdh_fail(pdhStat)) { |
|
544 /* printf("could not enumerate processors (2) error=%d", pdhStat); */ |
|
545 error = true; |
|
546 goto end; |
|
547 } |
|
548 //count perf count instances. |
|
549 for (p_count = 0, tmp = instances; *tmp != 0; tmp = &tmp[lstrlen(tmp)+1], p_count++); |
|
550 |
|
551 //is this correct for HT? |
|
552 assert(p_count == num_cpus+1); |
|
553 |
|
554 //ok, have number of perf counters. |
|
555 multiCounterCPULoad.counters = calloc(p_count, sizeof(HCOUNTER)); |
|
556 if (multiCounterCPULoad.counters == NULL) { |
|
557 /* printf("could not allocate memory (2) count=%d", p_count); */ |
|
558 error = true; |
|
559 goto end; |
|
560 } |
|
561 |
|
562 multiCounterCPULoad.noOfCounters = p_count; |
|
563 |
|
564 if (PdhOpenQuery_i(NULL, 0, &multiCounterCPULoad.query.query) != ERROR_SUCCESS) { |
|
565 /* printf("could not create query"); */ |
|
566 error = true; |
|
567 goto end; |
|
568 } |
|
569 //now, fetch the counters. |
|
570 for (i = 0, tmp = instances; *tmp != '\0'; tmp = &tmp[lstrlen(tmp)+1], i++) { |
|
571 char counter[2*COUNTER_BUF_SIZE]; |
|
572 |
|
573 _snprintf(counter, sizeof(counter)-1, "\\%s(%s)\\%s", processor, tmp, time); |
|
574 |
|
575 if (PdhAddCounter_i(multiCounterCPULoad.query.query, counter, 0, &multiCounterCPULoad.counters[i]) != ERROR_SUCCESS) { |
|
576 /* printf("error adding processor counter %s", counter); */ |
|
577 error = true; |
|
578 goto end; |
|
579 } |
|
580 } |
|
581 |
|
582 free(instances); |
|
583 instances = NULL; |
|
584 |
|
585 // Query once to initialize the counters needing at least two queries |
|
586 // (like the % CPU usage) to calculate correctly. |
|
587 if (PdhCollectQueryData_i(multiCounterCPULoad.query.query) != ERROR_SUCCESS) |
|
588 error = true; |
|
589 |
|
590 end: |
|
591 if (instances != NULL) { |
|
592 free(instances); |
|
593 } |
|
594 if (tmpQuery != NULL) { |
|
595 PdhCloseQuery_i(tmpQuery); |
|
596 } |
|
597 if (error) { |
|
598 int i; |
|
599 |
|
600 if (multiCounterCPULoad.counters != NULL) { |
|
601 for (i = 0; i < multiCounterCPULoad.noOfCounters; i++) { |
|
602 if (multiCounterCPULoad.counters[i] != NULL) { |
|
603 PdhRemoveCounter_i(multiCounterCPULoad.counters[i]); |
|
604 } |
|
605 } |
|
606 free(multiCounterCPULoad.counters[i]); |
|
607 } |
|
608 if (multiCounterCPULoad.query.query != NULL) { |
|
609 PdhCloseQuery_i(multiCounterCPULoad.query.query); |
|
610 } |
|
611 memset(&multiCounterCPULoad, 0, sizeof(MultipleCounterQueryS)); |
|
612 return -1; |
|
613 } |
|
614 return CONFIG_SUCCESSFUL; |
|
615 } |
|
616 |
|
617 /** |
|
618 * Help function that initializes the PDH process header for the JRockit process. |
|
619 * (You should probably use getProcessPDHHeader() instead!) |
|
620 * |
|
621 * initPDH() must have been run prior to calling this function. |
|
622 * |
|
623 * @param ebuf the error buffer. |
|
624 * @param elen the length of the error buffer. |
|
625 * |
|
626 * @return the PDH instance description corresponding to the JVM process. |
|
627 */ |
|
628 static char* |
|
629 initProcessPDHHeader(void) { |
|
630 static char hotspotheader[2*COUNTER_BUF_SIZE]; |
|
631 |
|
632 char counter[2*COUNTER_BUF_SIZE]; |
|
633 char processes[COUNTER_BUF_SIZE]; //'Process' == #230 |
|
634 char pid[COUNTER_BUF_SIZE]; //'ID Process' == 784 |
|
635 char module_name[MAX_PATH]; |
|
636 PDH_STATUS pdhStat; |
|
637 DWORD c_size = 0, i_size = 0; |
|
638 HQUERY tmpQuery = NULL; |
|
639 int i, myPid = _getpid(); |
|
640 BOOL error = false; |
|
641 char *instances, *tmp, *instance_name, *dot_pos; |
|
642 |
|
643 tmpQuery = NULL; |
|
644 myPid = _getpid(); |
|
645 error = false; |
|
646 |
|
647 if (find_name(PDH_PROCESS_IDX, processes, sizeof(processes) - 1) < 0) { |
|
648 return NULL; |
|
649 } |
|
650 |
|
651 if (find_name(PDH_ID_PROCESS_IDX, pid, sizeof(pid) - 1) < 0) { |
|
652 return NULL; |
|
653 } |
|
654 //time is same. |
|
655 |
|
656 c_size = 0; |
|
657 i_size = 0; |
|
658 |
|
659 pdhStat = PdhEnumObjectItems_i ( |
|
660 NULL, // reserved |
|
661 NULL, // local machine |
|
662 processes, // object to enumerate |
|
663 NULL, // pass in NULL buffers |
|
664 &c_size, // and 0 length to get |
|
665 NULL, // required size |
|
666 &i_size, // of the buffers in chars |
|
667 PERF_DETAIL_WIZARD, // counter detail level |
|
668 0); |
|
669 |
|
670 //ok, now we have enough to enumerate all processes |
|
671 if (pdh_fail(pdhStat)) { |
|
672 /* printf("Could not enumerate processes (1) error=%d", pdhStat); */ |
|
673 return NULL; |
|
674 } |
|
675 |
|
676 // use calloc because windows vista does not null terminate the instance names (allthough the docs says it will) |
|
677 if ((instances = calloc(i_size, 1)) == NULL) { |
|
678 /* printf("Could not allocate memory %d bytes", i_size); */ |
|
679 error = true; |
|
680 goto end; |
|
681 } |
|
682 |
|
683 c_size = 0; |
|
684 |
|
685 pdhStat = PdhEnumObjectItems_i ( |
|
686 NULL, // reserved |
|
687 NULL, // local machine |
|
688 processes, // object to enumerate |
|
689 NULL, // pass in NULL buffers |
|
690 &c_size, // and 0 length to get |
|
691 instances, // required size |
|
692 &i_size, // of the buffers in chars |
|
693 PERF_DETAIL_WIZARD, // counter detail level |
|
694 0); |
|
695 |
|
696 // ok, now we have enough to enumerate all processes |
|
697 if (pdh_fail(pdhStat)) { |
|
698 /* printf("Could not enumerate processes (2) error=%d", pdhStat); */ |
|
699 error = true; |
|
700 goto end; |
|
701 } |
|
702 |
|
703 if (PdhOpenQuery_i(NULL, 0, &tmpQuery) != ERROR_SUCCESS) { |
|
704 /* printf("Could not create temporary query"); */ |
|
705 error = true; |
|
706 goto end; |
|
707 } |
|
708 |
|
709 // Find our module name and use it to extract the instance name used by PDH |
|
710 if (GetModuleFileName(NULL, module_name, MAX_PATH) >= MAX_PATH-1) { |
|
711 /* printf("Module name truncated"); */ |
|
712 error = true; |
|
713 goto end; |
|
714 } |
|
715 instance_name = strrchr(module_name, '\\'); //drop path |
|
716 instance_name++; //skip slash |
|
717 dot_pos = strchr(instance_name, '.'); //drop .exe |
|
718 dot_pos[0] = '\0'; |
|
719 |
|
720 //now, fetch the counters. |
|
721 for (tmp = instances; *tmp != 0 && !error; tmp = &tmp[lstrlen(tmp)+1]) { |
|
722 HCOUNTER hc = NULL; |
|
723 BOOL done = false; |
|
724 |
|
725 // Skip until we find our own process name |
|
726 if (strcmp(tmp, instance_name) != 0) { |
|
727 continue; |
|
728 } |
|
729 |
|
730 // iterate over all instance indexes and try to find our own pid |
|
731 for (i = 0; !done && !error; i++){ |
|
732 PDH_STATUS res; |
|
733 _snprintf(counter, sizeof(counter)-1, "\\%s(%s#%d)\\%s", processes, tmp, i, pid); |
|
734 |
|
735 if (PdhAddCounter_i(tmpQuery, counter, 0, &hc) != ERROR_SUCCESS) { |
|
736 /* printf("Failed to create process id query"); */ |
|
737 error = true; |
|
738 goto end; |
|
739 } |
|
740 |
|
741 res = PdhCollectQueryData_i(tmpQuery); |
|
742 |
|
743 if (res == PDH_INVALID_HANDLE) { |
|
744 /* printf("Failed to query process id"); */ |
|
745 res = -1; |
|
746 done = true; |
|
747 } else if (res == PDH_NO_DATA) { |
|
748 done = true; |
|
749 } else { |
|
750 PDH_FMT_COUNTERVALUE cv; |
|
751 |
|
752 PdhGetFormattedCounterValue_i(hc, PDH_FMT_LONG, NULL, &cv); |
|
753 /* |
|
754 * This check seems to be needed for Win2k SMP boxes, since |
|
755 * they for some reason don't return PDH_NO_DATA for non existing |
|
756 * counters. |
|
757 */ |
|
758 if (cv.CStatus != PDH_CSTATUS_VALID_DATA) { |
|
759 done = true; |
|
760 } else if (cv.longValue == myPid) { |
|
761 _snprintf(hotspotheader, sizeof(hotspotheader)-1, "\\%s(%s#%d)\0", processes, tmp, i); |
|
762 PdhRemoveCounter_i(hc); |
|
763 goto end; |
|
764 } |
|
765 } |
|
766 PdhRemoveCounter_i(hc); |
|
767 } |
|
768 } |
|
769 end: |
|
770 if (instances != NULL) { |
|
771 free(instances); |
|
772 } |
|
773 if (tmpQuery != NULL) { |
|
774 PdhCloseQuery_i(tmpQuery); |
|
775 } |
|
776 if (error) { |
|
777 return NULL; |
|
778 } |
|
779 return hotspotheader; |
|
780 } |
|
781 |
|
782 /** |
|
783 * Returns the PDH string prefix identifying the HotSpot process. Use this prefix when getting |
|
784 * counters from the PDH process object representing HotSpot. |
|
785 * |
|
786 * Note: this call may take some time to complete. |
|
787 * |
|
788 * @param ebuf error buffer. |
|
789 * @param elen error buffer length. |
|
790 * |
|
791 * @return the header to be used when retrieving PDH counters from the HotSpot process. |
|
792 * Will return NULL if the call failed. |
|
793 */ |
|
794 static char * |
|
795 getProcessPDHHeader(void) { |
|
796 static char *processHeader = NULL; |
|
797 |
|
798 EnterCriticalSection(&processHeaderLock); { |
|
799 if (processHeader == NULL) { |
|
800 processHeader = initProcessPDHHeader(); |
|
801 } |
|
802 } LeaveCriticalSection(&processHeaderLock); |
|
803 return processHeader; |
|
804 } |
|
805 |
|
806 int perfInit(void); |
|
807 |
|
808 double |
|
809 perfGetCPULoad(int which) |
|
810 { |
|
811 PDH_FMT_COUNTERVALUE cv; |
|
812 HCOUNTER c; |
|
813 |
|
814 if (perfInit() < 0) { |
|
815 // warn? |
|
816 return -1.0; |
|
817 } |
|
818 |
|
819 if (multiCounterCPULoad.query.query == NULL) { |
|
820 // warn? |
|
821 return -1.0; |
|
822 } |
|
823 |
|
824 if (which == -1) { |
|
825 c = multiCounterCPULoad.counters[multiCounterCPULoad.noOfCounters - 1]; |
|
826 } else { |
|
827 if (which < multiCounterCPULoad.noOfCounters) { |
|
828 c = multiCounterCPULoad.counters[which]; |
|
829 } else { |
|
830 return -1.0; |
|
831 } |
|
832 } |
|
833 if (getPerformanceData(&multiCounterCPULoad.query, c, &cv, PDH_FMT_DOUBLE ) == CONFIG_SUCCESSFUL) { |
|
834 return cv.doubleValue / 100; |
|
835 } |
|
836 return -1.0; |
|
837 } |
|
838 |
|
839 double |
|
840 perfGetProcessLoad(void) |
|
841 { |
|
842 PDH_FMT_COUNTERVALUE cv; |
|
843 |
|
844 if (perfInit() < 0) { |
|
845 // warn? |
|
846 return -1.0; |
|
847 } |
|
848 |
|
849 if (cntProcLoad.query.query == NULL) { |
|
850 // warn? |
|
851 return -1.0; |
|
852 } |
|
853 |
|
854 if (getPerformanceData(&cntProcLoad.query, cntProcLoad.counter, &cv, PDH_FMT_DOUBLE | PDH_FMT_NOCAP100) == CONFIG_SUCCESSFUL) { |
|
855 double d = cv.doubleValue / cpuFactor; |
|
856 d = min(1, d); |
|
857 d = max(0, d); |
|
858 return d; |
|
859 } |
|
860 return -1.0; |
|
861 } |
|
862 |
|
863 /** |
|
864 * Helper to initialize the PDH library. Loads the library and sets up the functions. |
|
865 * Note that once loaded, we will never unload the PDH library. |
|
866 * |
|
867 * @return CONFIG_SUCCESSFUL if successful, negative on failure. |
|
868 */ |
|
869 int |
|
870 perfInit(void) { |
|
871 static HMODULE h; |
|
872 static BOOL running, inited; |
|
873 |
|
874 int error; |
|
875 |
|
876 if (running) { |
|
877 return CONFIG_SUCCESSFUL; |
|
878 } |
|
879 |
|
880 error = CONFIG_SUCCESSFUL; |
|
881 |
|
882 // this is double checked locking again, but we try to bypass the worst by |
|
883 // implicit membar at end of lock. |
|
884 EnterCriticalSection(&initializationLock); { |
|
885 if (!inited) { |
|
886 char buf[64] = ""; |
|
887 SYSTEM_INFO si; |
|
888 |
|
889 // CMH. But windows will not care about our affinity when giving |
|
890 // us measurements. Need the real, raw num cpus. |
|
891 |
|
892 GetSystemInfo(&si); |
|
893 num_cpus = si.dwNumberOfProcessors; |
|
894 // Initialize the denominator for the jvm load calculations |
|
895 cpuFactor = num_cpus * 100; |
|
896 |
|
897 /** |
|
898 * Do this dynamically, so we don't fail to start on systems without pdh. |
|
899 */ |
|
900 if ((h = LoadLibrary("pdh.dll")) == NULL) { |
|
901 /* printf("Could not load pdh.dll (%d)", GetLastError()); */ |
|
902 error = -2; |
|
903 } else if (get_functions(h, buf, sizeof(buf)) < 0) { |
|
904 FreeLibrary(h); |
|
905 h = NULL; |
|
906 error = -2; |
|
907 /* printf("Failed to init pdh functions: %s.\n", buf); */ |
|
908 } else { |
|
909 if (initProcessorCounters() != 0) { |
|
910 /* printf("Failed to init system load counters.\n"); */ |
|
911 } else if (initProcLoadCounter() != 0) { |
|
912 /* printf("Failed to init process load counter.\n"); */ |
|
913 } else if (initProcSystemLoadCounter() != 0) { |
|
914 /* printf("Failed to init process system load counter.\n"); */ |
|
915 } else { |
|
916 inited = true; |
|
917 } |
|
918 } |
|
919 } |
|
920 } LeaveCriticalSection(&initializationLock); |
|
921 |
|
922 if (inited && error == CONFIG_SUCCESSFUL) { |
|
923 running = true; |
|
924 } |
|
925 |
|
926 return error; |
|
927 } |
|
928 |
|
929 JNIEXPORT jdouble JNICALL |
|
930 Java_com_sun_management_OperatingSystem_getSystemCpuLoad |
|
931 (JNIEnv *env, jobject dummy) |
|
932 { |
|
933 return perfGetCPULoad(-1); |
|
934 } |
|
935 |
|
936 JNIEXPORT jdouble JNICALL |
|
937 Java_com_sun_management_OperatingSystem_getProcessCpuLoad |
|
938 (JNIEnv *env, jobject dummy) |
|
939 { |
|
940 return perfGetProcessLoad(); |
|
941 } |
|