1 | /* |
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2 | * CPU Usage Reporter |
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3 | * |
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4 | * COPYRIGHT (c) 1989-2010. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #ifdef HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <string.h> |
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19 | #include <stdlib.h> |
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20 | #include <stdio.h> |
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21 | #include <ctype.h> |
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22 | #include <inttypes.h> |
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23 | |
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24 | #include <rtems/cpuuse.h> |
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25 | |
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26 | #ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ |
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27 | static bool is_executing_on_a_core( |
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28 | Thread_Control *the_thread, |
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29 | Timestamp_Control *time_of_context_switch |
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30 | ) |
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31 | { |
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32 | #ifndef RTEMS_SMP |
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33 | if ( _Thread_Executing->Object.id == the_thread->Object.id ) { |
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34 | *time_of_context_switch = _Thread_Time_of_last_context_switch; |
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35 | return true; |
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36 | } |
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37 | #else |
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38 | int cpu; |
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39 | for ( cpu=0 ; cpu < rtems_smp_get_number_of_processors() ; cpu++ ) { |
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40 | Per_CPU_Control *p = &_Per_CPU_Information[cpu]; |
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41 | if ( p->executing->Object.id == the_thread->Object.id ) { |
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42 | *time_of_context_switch = p->time_of_last_context_switch; |
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43 | return true; |
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44 | } |
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45 | } |
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46 | #endif |
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47 | return false; |
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48 | } |
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49 | #endif |
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50 | |
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51 | /* |
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52 | * rtems_cpu_usage_report |
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53 | */ |
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54 | void rtems_cpu_usage_report_with_plugin( |
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55 | void *context, |
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56 | rtems_printk_plugin_t print |
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57 | ) |
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58 | { |
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59 | uint32_t i; |
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60 | uint32_t api_index; |
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61 | Thread_Control *the_thread; |
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62 | Objects_Information *information; |
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63 | char name[13]; |
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64 | uint32_t ival, fval; |
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65 | #ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ |
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66 | Timestamp_Control uptime, total, ran, uptime_at_last_reset; |
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67 | uint32_t seconds, nanoseconds; |
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68 | #else |
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69 | uint32_t total_units = 0; |
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70 | #endif |
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71 | |
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72 | if ( !print ) |
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73 | return; |
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74 | |
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75 | /* |
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76 | * When not using nanosecond CPU usage resolution, we have to count |
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77 | * the number of "ticks" we gave credit for to give the user a rough |
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78 | * guideline as to what each number means proportionally. |
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79 | */ |
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80 | #ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ |
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81 | _Timestamp_Set_to_zero( &total ); |
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82 | uptime_at_last_reset = CPU_usage_Uptime_at_last_reset; |
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83 | #else |
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84 | for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST ; api_index++ ) { |
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85 | #if !defined(RTEMS_POSIX_API) || defined(RTEMS_DEBUG) |
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86 | if ( !_Objects_Information_table[ api_index ] ) |
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87 | continue; |
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88 | #endif |
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89 | |
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90 | information = _Objects_Information_table[ api_index ][ 1 ]; |
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91 | if ( information ) { |
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92 | for ( i=1 ; i <= information->maximum ; i++ ) { |
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93 | the_thread = (Thread_Control *)information->local_table[ i ]; |
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94 | |
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95 | if ( the_thread ) |
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96 | total_units += the_thread->cpu_time_used; |
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97 | } |
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98 | } |
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99 | } |
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100 | #endif |
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101 | |
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102 | (*print)( |
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103 | context, |
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104 | "-------------------------------------------------------------------------------\n" |
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105 | " CPU USAGE BY THREAD\n" |
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106 | "------------+----------------------------------------+---------------+---------\n" |
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107 | #ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ |
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108 | " ID | NAME | SECONDS | PERCENT\n" |
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109 | #else |
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110 | " ID | NAME | TICKS | PERCENT\n" |
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111 | #endif |
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112 | "------------+----------------------------------------+---------------+---------\n" |
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113 | ); |
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114 | |
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115 | for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST ; api_index++ ) { |
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116 | #if !defined(RTEMS_POSIX_API) || defined(RTEMS_DEBUG) |
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117 | if ( !_Objects_Information_table[ api_index ] ) |
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118 | continue; |
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119 | #endif |
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120 | |
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121 | information = _Objects_Information_table[ api_index ][ 1 ]; |
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122 | if ( information ) { |
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123 | for ( i=1 ; i <= information->maximum ; i++ ) { |
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124 | the_thread = (Thread_Control *)information->local_table[ i ]; |
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125 | |
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126 | if ( !the_thread ) |
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127 | continue; |
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128 | |
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129 | rtems_object_get_name( the_thread->Object.id, sizeof(name), name ); |
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130 | |
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131 | (*print)( |
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132 | context, |
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133 | " 0x%08" PRIx32 " | %-38s |", |
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134 | the_thread->Object.id, |
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135 | name |
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136 | ); |
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137 | |
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138 | #ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ |
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139 | { |
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140 | Timestamp_Control last; |
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141 | |
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142 | /* |
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143 | * If this is the currently executing thread, account for time |
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144 | * since the last context switch. |
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145 | */ |
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146 | ran = the_thread->cpu_time_used; |
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147 | if ( is_executing_on_a_core( the_thread, &last ) ) { |
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148 | Timestamp_Control used; |
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149 | _TOD_Get_uptime( &uptime ); |
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150 | _Timestamp_Subtract( &last, &uptime, &used ); |
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151 | _Timestamp_Add_to( &ran, &used ); |
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152 | } else { |
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153 | _TOD_Get_uptime( &uptime ); |
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154 | } |
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155 | _Timestamp_Subtract( &uptime_at_last_reset, &uptime, &total ); |
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156 | _Timestamp_Divide( &ran, &total, &ival, &fval ); |
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157 | |
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158 | /* |
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159 | * Print the information |
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160 | */ |
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161 | |
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162 | seconds = _Timestamp_Get_seconds( &ran ); |
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163 | nanoseconds = _Timestamp_Get_nanoseconds( &ran ) / |
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164 | TOD_NANOSECONDS_PER_MICROSECOND; |
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165 | (*print)( context, |
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166 | "%7" PRIu32 ".%06" PRIu32 " |%4" PRIu32 ".%03" PRIu32 "\n", |
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167 | seconds, nanoseconds, |
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168 | ival, fval |
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169 | ); |
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170 | } |
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171 | #else |
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172 | if (total_units) { |
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173 | uint64_t ival_64; |
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174 | |
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175 | ival_64 = the_thread->cpu_time_used; |
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176 | ival_64 *= 100000; |
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177 | ival = ival_64 / total_units; |
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178 | } else { |
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179 | ival = 0; |
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180 | } |
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181 | |
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182 | fval = ival % 1000; |
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183 | ival /= 1000; |
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184 | (*print)( context, |
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185 | "%14" PRIu32 " |%4" PRIu32 ".%03" PRIu32 "\n", |
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186 | the_thread->cpu_time_used, |
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187 | ival, |
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188 | fval |
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189 | ); |
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190 | #endif |
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191 | } |
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192 | } |
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193 | } |
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194 | |
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195 | #ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ |
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196 | seconds = _Timestamp_Get_seconds( &total ); |
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197 | nanoseconds = _Timestamp_Get_nanoseconds( &total ) / |
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198 | TOD_NANOSECONDS_PER_MICROSECOND; |
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199 | (*print)( |
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200 | context, |
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201 | "------------+----------------------------------------+---------------+---------\n" |
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202 | " TIME SINCE LAST CPU USAGE RESET IN SECONDS: %7" PRIu32 ".%06" PRIu32 "\n" |
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203 | "-------------------------------------------------------------------------------\n", |
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204 | seconds, nanoseconds |
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205 | ); |
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206 | #else |
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207 | (*print)( |
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208 | context, |
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209 | "------------+----------------------------------------+---------------+---------\n" |
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210 | " TICKS SINCE LAST SYSTEM RESET: %14" PRIu32 "\n" |
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211 | " TOTAL UNITS: %14" PRIu32 "\n" |
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212 | "-------------------------------------------------------------------------------\n", |
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213 | _Watchdog_Ticks_since_boot - CPU_usage_Ticks_at_last_reset, |
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214 | total_units |
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215 | ); |
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216 | #endif |
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217 | } |
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218 | |
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219 | void rtems_cpu_usage_report( void ) |
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220 | { |
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221 | rtems_cpu_usage_report_with_plugin( NULL, printk_plugin ); |
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222 | } |
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