1 | /* |
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2 | * Copyright (c) 2013, 2016 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Dornierstr. 4 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * Copyright (c) 2013 Deng Hengyi. |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #ifdef HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/score/atomic.h> |
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22 | #include <rtems/score/smpbarrier.h> |
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23 | #include <rtems.h> |
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24 | #include <rtems/bsd.h> |
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25 | #include <rtems/test.h> |
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26 | #include <limits.h> |
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27 | #include <string.h> |
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28 | |
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29 | #include "tmacros.h" |
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30 | |
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31 | const char rtems_test_name[] = "SMPATOMIC 1"; |
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32 | |
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33 | #define MS_PER_TICK 10 |
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34 | |
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35 | #define MASTER_PRIORITY 1 |
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36 | |
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37 | #define WORKER_PRIORITY 2 |
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38 | |
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39 | #define CPU_COUNT 32 |
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40 | |
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41 | typedef struct { |
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42 | rtems_test_parallel_context base; |
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43 | Atomic_Ulong atomic_value; |
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44 | unsigned long per_worker_value[CPU_COUNT]; |
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45 | unsigned long normal_value; |
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46 | char unused_space_for_cache_line_separation[128]; |
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47 | unsigned long second_value; |
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48 | Atomic_Flag global_flag; |
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49 | SMP_barrier_Control barrier; |
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50 | SMP_barrier_State barrier_state[CPU_COUNT]; |
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51 | sbintime_t load_trigger_time; |
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52 | sbintime_t load_change_time[CPU_COUNT]; |
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53 | int load_count[CPU_COUNT]; |
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54 | sbintime_t rmw_trigger_time; |
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55 | sbintime_t rmw_change_time[CPU_COUNT]; |
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56 | int rmw_count[CPU_COUNT]; |
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57 | } smpatomic01_context; |
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58 | |
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59 | static smpatomic01_context test_instance; |
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60 | |
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61 | static rtems_interval test_duration(void) |
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62 | { |
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63 | return rtems_clock_get_ticks_per_second(); |
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64 | } |
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65 | |
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66 | static void test_fini( |
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67 | smpatomic01_context *ctx, |
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68 | const char *test, |
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69 | bool atomic |
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70 | ) |
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71 | { |
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72 | unsigned long expected_value = 0; |
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73 | unsigned long actual_value; |
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74 | size_t worker_index; |
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75 | |
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76 | printf("=== atomic %s test case ===\n", test); |
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77 | |
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78 | for ( |
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79 | worker_index = 0; |
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80 | worker_index < ctx->base.worker_count; |
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81 | ++worker_index |
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82 | ) { |
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83 | unsigned long worker_value = ctx->per_worker_value[worker_index]; |
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84 | |
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85 | expected_value += worker_value; |
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86 | |
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87 | printf( |
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88 | "worker %zu value: %lu\n", |
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89 | worker_index, |
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90 | worker_value |
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91 | ); |
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92 | } |
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93 | |
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94 | if (atomic) { |
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95 | actual_value = _Atomic_Load_ulong(&ctx->atomic_value, ATOMIC_ORDER_RELAXED); |
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96 | } else { |
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97 | actual_value = ctx->normal_value; |
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98 | } |
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99 | |
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100 | printf( |
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101 | "atomic value: expected = %lu, actual = %lu\n", |
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102 | expected_value, |
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103 | actual_value |
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104 | ); |
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105 | |
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106 | rtems_test_assert(expected_value == actual_value); |
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107 | } |
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108 | |
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109 | |
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110 | static rtems_interval test_atomic_add_init( |
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111 | rtems_test_parallel_context *base, |
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112 | void *arg, |
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113 | size_t active_workers |
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114 | ) |
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115 | { |
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116 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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117 | |
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118 | _Atomic_Init_ulong(&ctx->atomic_value, 0); |
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119 | |
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120 | return test_duration(); |
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121 | } |
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122 | |
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123 | static void test_atomic_add_body( |
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124 | rtems_test_parallel_context *base, |
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125 | void *arg, |
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126 | size_t active_workers, |
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127 | size_t worker_index |
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128 | ) |
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129 | { |
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130 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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131 | unsigned long counter = 0; |
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132 | |
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133 | while (!rtems_test_parallel_stop_job(&ctx->base)) { |
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134 | ++counter; |
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135 | _Atomic_Fetch_add_ulong(&ctx->atomic_value, 1, ATOMIC_ORDER_RELAXED); |
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136 | } |
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137 | |
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138 | ctx->per_worker_value[worker_index] = counter; |
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139 | } |
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140 | |
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141 | static void test_atomic_add_fini( |
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142 | rtems_test_parallel_context *base, |
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143 | void *arg, |
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144 | size_t active_workers |
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145 | ) |
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146 | { |
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147 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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148 | |
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149 | test_fini(ctx, "add", true); |
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150 | } |
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151 | |
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152 | static rtems_interval test_atomic_flag_init( |
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153 | rtems_test_parallel_context *base, |
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154 | void *arg, |
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155 | size_t active_workers |
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156 | ) |
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157 | { |
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158 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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159 | |
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160 | _Atomic_Flag_clear(&ctx->global_flag, ATOMIC_ORDER_RELEASE); |
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161 | ctx->normal_value = 0; |
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162 | |
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163 | return test_duration(); |
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164 | } |
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165 | |
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166 | static void test_atomic_flag_body( |
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167 | rtems_test_parallel_context *base, |
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168 | void *arg, |
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169 | size_t active_workers, |
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170 | size_t worker_index |
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171 | ) |
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172 | { |
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173 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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174 | unsigned long counter = 0; |
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175 | |
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176 | while (!rtems_test_parallel_stop_job(&ctx->base)) { |
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177 | while (_Atomic_Flag_test_and_set(&ctx->global_flag, ATOMIC_ORDER_ACQUIRE)) { |
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178 | /* Wait */ |
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179 | } |
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180 | |
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181 | ++counter; |
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182 | ++ctx->normal_value; |
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183 | |
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184 | _Atomic_Flag_clear(&ctx->global_flag, ATOMIC_ORDER_RELEASE); |
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185 | } |
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186 | |
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187 | ctx->per_worker_value[worker_index] = counter; |
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188 | } |
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189 | |
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190 | static void test_atomic_flag_fini( |
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191 | rtems_test_parallel_context *base, |
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192 | void *arg, |
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193 | size_t active_workers |
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194 | ) |
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195 | { |
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196 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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197 | |
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198 | test_fini(ctx, "flag", false); |
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199 | } |
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200 | |
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201 | static rtems_interval test_atomic_sub_init( |
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202 | rtems_test_parallel_context *base, |
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203 | void *arg, |
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204 | size_t active_workers |
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205 | ) |
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206 | { |
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207 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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208 | |
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209 | _Atomic_Init_ulong(&ctx->atomic_value, 0); |
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210 | |
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211 | return test_duration(); |
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212 | } |
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213 | |
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214 | static void test_atomic_sub_body( |
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215 | rtems_test_parallel_context *base, |
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216 | void *arg, |
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217 | size_t active_workers, |
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218 | size_t worker_index |
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219 | ) |
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220 | { |
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221 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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222 | unsigned long counter = 0; |
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223 | |
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224 | while (!rtems_test_parallel_stop_job(&ctx->base)) { |
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225 | --counter; |
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226 | _Atomic_Fetch_sub_ulong(&ctx->atomic_value, 1, ATOMIC_ORDER_RELAXED); |
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227 | } |
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228 | |
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229 | ctx->per_worker_value[worker_index] = counter; |
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230 | } |
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231 | |
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232 | static void test_atomic_sub_fini( |
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233 | rtems_test_parallel_context *base, |
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234 | void *arg, |
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235 | size_t active_workers |
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236 | ) |
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237 | { |
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238 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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239 | |
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240 | test_fini(ctx, "sub", true); |
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241 | } |
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242 | |
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243 | static rtems_interval test_atomic_compare_exchange_init( |
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244 | rtems_test_parallel_context *base, |
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245 | void *arg, |
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246 | size_t active_workers |
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247 | ) |
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248 | { |
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249 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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250 | |
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251 | _Atomic_Init_ulong(&ctx->atomic_value, 0); |
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252 | ctx->normal_value = 0; |
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253 | |
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254 | return test_duration(); |
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255 | } |
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256 | |
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257 | static void test_atomic_compare_exchange_body( |
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258 | rtems_test_parallel_context *base, |
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259 | void *arg, |
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260 | size_t active_workers, |
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261 | size_t worker_index |
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262 | ) |
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263 | { |
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264 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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265 | unsigned long counter = 0; |
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266 | |
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267 | while (!rtems_test_parallel_stop_job(&ctx->base)) { |
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268 | bool success; |
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269 | |
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270 | do { |
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271 | unsigned long zero = 0; |
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272 | |
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273 | success = _Atomic_Compare_exchange_ulong( |
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274 | &ctx->atomic_value, |
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275 | &zero, |
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276 | 1, |
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277 | ATOMIC_ORDER_ACQUIRE, |
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278 | ATOMIC_ORDER_RELAXED |
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279 | ); |
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280 | } while (!success); |
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281 | |
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282 | ++counter; |
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283 | ++ctx->normal_value; |
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284 | |
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285 | _Atomic_Store_ulong(&ctx->atomic_value, 0, ATOMIC_ORDER_RELEASE); |
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286 | } |
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287 | |
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288 | ctx->per_worker_value[worker_index] = counter; |
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289 | } |
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290 | |
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291 | static void test_atomic_compare_exchange_fini( |
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292 | rtems_test_parallel_context *base, |
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293 | void *arg, |
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294 | size_t active_workers |
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295 | ) |
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296 | { |
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297 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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298 | |
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299 | test_fini(ctx, "compare exchange", false); |
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300 | } |
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301 | |
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302 | static rtems_interval test_atomic_or_and_init( |
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303 | rtems_test_parallel_context *base, |
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304 | void *arg, |
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305 | size_t active_workers |
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306 | ) |
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307 | { |
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308 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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309 | |
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310 | _Atomic_Init_ulong(&ctx->atomic_value, 0); |
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311 | |
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312 | return test_duration(); |
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313 | } |
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314 | |
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315 | static void test_atomic_or_and_body( |
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316 | rtems_test_parallel_context *base, |
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317 | void *arg, |
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318 | size_t active_workers, |
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319 | size_t worker_index |
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320 | ) |
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321 | { |
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322 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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323 | unsigned long the_bit = 1UL << worker_index; |
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324 | unsigned long current_bit = 0; |
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325 | |
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326 | while (!rtems_test_parallel_stop_job(&ctx->base)) { |
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327 | unsigned long previous; |
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328 | |
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329 | if (current_bit != 0) { |
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330 | previous = _Atomic_Fetch_and_ulong( |
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331 | &ctx->atomic_value, |
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332 | ~the_bit, |
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333 | ATOMIC_ORDER_RELAXED |
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334 | ); |
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335 | current_bit = 0; |
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336 | } else { |
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337 | previous = _Atomic_Fetch_or_ulong( |
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338 | &ctx->atomic_value, |
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339 | the_bit, |
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340 | ATOMIC_ORDER_RELAXED |
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341 | ); |
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342 | current_bit = the_bit; |
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343 | } |
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344 | |
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345 | rtems_test_assert((previous & the_bit) != current_bit); |
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346 | } |
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347 | |
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348 | ctx->per_worker_value[worker_index] = current_bit; |
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349 | } |
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350 | |
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351 | static void test_atomic_or_and_fini( |
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352 | rtems_test_parallel_context *base, |
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353 | void *arg, |
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354 | size_t active_workers |
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355 | ) |
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356 | { |
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357 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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358 | |
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359 | test_fini(ctx, "or/and", true); |
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360 | } |
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361 | |
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362 | static rtems_interval test_atomic_fence_init( |
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363 | rtems_test_parallel_context *base, |
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364 | void *arg, |
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365 | size_t active_workers |
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366 | ) |
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367 | { |
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368 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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369 | |
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370 | ctx->normal_value = 0; |
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371 | ctx->second_value = 0; |
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372 | _Atomic_Fence(ATOMIC_ORDER_RELEASE); |
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373 | |
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374 | return test_duration(); |
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375 | } |
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376 | |
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377 | static void test_atomic_fence_body( |
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378 | rtems_test_parallel_context *base, |
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379 | void *arg, |
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380 | size_t active_workers, |
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381 | size_t worker_index |
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382 | ) |
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383 | { |
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384 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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385 | |
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386 | if (rtems_test_parallel_is_master_worker(worker_index)) { |
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387 | unsigned long counter = 0; |
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388 | |
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389 | while (!rtems_test_parallel_stop_job(&ctx->base)) { |
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390 | ++counter; |
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391 | ctx->normal_value = counter; |
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392 | _Atomic_Fence(ATOMIC_ORDER_RELEASE); |
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393 | ctx->second_value = counter; |
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394 | } |
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395 | } else { |
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396 | while (!rtems_test_parallel_stop_job(&ctx->base)) { |
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397 | unsigned long n; |
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398 | unsigned long s; |
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399 | |
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400 | s = ctx->second_value; |
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401 | _Atomic_Fence(ATOMIC_ORDER_ACQUIRE); |
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402 | n = ctx->normal_value; |
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403 | |
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404 | rtems_test_assert(n - s < LONG_MAX); |
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405 | } |
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406 | } |
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407 | } |
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408 | |
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409 | static void test_atomic_fence_fini( |
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410 | rtems_test_parallel_context *base, |
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411 | void *arg, |
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412 | size_t active_workers |
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413 | ) |
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414 | { |
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415 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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416 | |
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417 | printf( |
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418 | "=== atomic fence test case ===\n" |
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419 | "normal value = %lu, second value = %lu\n", |
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420 | ctx->normal_value, |
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421 | ctx->second_value |
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422 | ); |
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423 | } |
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424 | |
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425 | static rtems_interval test_atomic_store_load_rmw_init( |
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426 | rtems_test_parallel_context *base, |
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427 | void *arg, |
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428 | size_t active_workers |
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429 | ) |
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430 | { |
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431 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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432 | size_t i; |
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433 | |
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434 | _Atomic_Init_ulong(&ctx->atomic_value, 0); |
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435 | |
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436 | _SMP_barrier_Control_initialize(&ctx->barrier); |
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437 | |
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438 | for (i = 0; i < active_workers; ++i) { |
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439 | _SMP_barrier_State_initialize(&ctx->barrier_state[i]); |
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440 | } |
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441 | |
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442 | return 0; |
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443 | } |
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444 | |
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445 | static sbintime_t now(void) |
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446 | { |
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447 | struct bintime bt; |
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448 | |
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449 | rtems_bsd_binuptime(&bt); |
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450 | return bttosbt(bt); |
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451 | } |
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452 | |
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453 | static void test_atomic_store_load_rmw_body( |
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454 | rtems_test_parallel_context *base, |
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455 | void *arg, |
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456 | size_t active_workers, |
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457 | size_t worker_index |
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458 | ) |
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459 | { |
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460 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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461 | uint32_t cpu_self_index; |
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462 | sbintime_t t; |
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463 | int counter; |
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464 | |
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465 | if (rtems_test_parallel_is_master_worker(worker_index)) { |
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466 | rtems_status_code sc; |
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467 | |
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468 | sc = rtems_task_wake_after(1); |
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469 | rtems_test_assert(sc == RTEMS_SUCCESSFUL); |
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470 | |
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471 | t = now(); |
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472 | t += (MS_PER_TICK / 2) * SBT_1MS; |
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473 | ctx->load_trigger_time = t; |
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474 | t += MS_PER_TICK * SBT_1MS; |
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475 | ctx->rmw_trigger_time = t; |
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476 | } |
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477 | |
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478 | _Atomic_Fence(ATOMIC_ORDER_SEQ_CST); |
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479 | |
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480 | _SMP_barrier_Wait( |
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481 | &ctx->barrier, |
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482 | &ctx->barrier_state[worker_index], |
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483 | active_workers |
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484 | ); |
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485 | |
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486 | /* |
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487 | * Use the physical processor index, to observe timing differences introduced |
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488 | * by the system topology. |
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489 | */ |
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490 | cpu_self_index = rtems_get_current_processor(); |
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491 | |
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492 | /* Store release and load acquire test case */ |
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493 | |
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494 | counter = 0; |
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495 | t = ctx->load_trigger_time; |
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496 | |
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497 | while (now() < t) { |
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498 | /* Wait */ |
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499 | } |
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500 | |
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501 | if (cpu_self_index == 0) { |
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502 | _Atomic_Store_ulong(&ctx->atomic_value, 1, ATOMIC_ORDER_RELEASE); |
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503 | } else { |
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504 | while (_Atomic_Load_ulong(&ctx->atomic_value, ATOMIC_ORDER_ACQUIRE) == 0) { |
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505 | ++counter; |
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506 | } |
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507 | } |
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508 | |
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509 | ctx->load_change_time[cpu_self_index] = now(); |
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510 | ctx->load_count[cpu_self_index] = counter; |
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511 | |
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512 | /* Read-modify-write test case */ |
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513 | |
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514 | if (cpu_self_index == 0) { |
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515 | _Atomic_Store_ulong(&ctx->atomic_value, 0, ATOMIC_ORDER_RELAXED); |
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516 | } |
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517 | |
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518 | counter = 0; |
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519 | t = ctx->rmw_trigger_time; |
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520 | |
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521 | while (now() < t) { |
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522 | /* Wait */ |
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523 | } |
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524 | |
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525 | if (cpu_self_index == 0) { |
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526 | _Atomic_Store_ulong(&ctx->atomic_value, 1, ATOMIC_ORDER_RELAXED); |
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527 | } else { |
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528 | while ( |
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529 | (_Atomic_Fetch_or_ulong(&ctx->atomic_value, 2, ATOMIC_ORDER_RELAXED) & 1) |
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530 | == 0 |
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531 | ) { |
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532 | ++counter; |
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533 | } |
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534 | } |
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535 | |
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536 | ctx->rmw_change_time[cpu_self_index] = now(); |
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537 | ctx->rmw_count[cpu_self_index] = counter; |
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538 | } |
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539 | |
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540 | static void test_atomic_store_load_rmw_fini( |
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541 | rtems_test_parallel_context *base, |
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542 | void *arg, |
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543 | size_t active_workers |
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544 | ) |
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545 | { |
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546 | smpatomic01_context *ctx = (smpatomic01_context *) base; |
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547 | size_t i; |
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548 | struct bintime bt; |
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549 | struct timespec ts; |
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550 | |
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551 | printf("=== atomic store release and load acquire test case ===\n"); |
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552 | |
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553 | for (i = 0; i < active_workers; ++i) { |
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554 | bt = sbttobt(ctx->load_change_time[i] - ctx->load_trigger_time); |
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555 | bintime2timespec(&bt, &ts); |
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556 | printf( |
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557 | "processor %zu delta %lins, load count %i\n", |
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558 | i, |
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559 | ts.tv_nsec, |
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560 | ctx->load_count[i] |
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561 | ); |
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562 | } |
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563 | |
---|
564 | printf("=== atomic read-modify-write test case ===\n"); |
---|
565 | |
---|
566 | for (i = 0; i < active_workers; ++i) { |
---|
567 | bt = sbttobt(ctx->rmw_change_time[i] - ctx->rmw_trigger_time); |
---|
568 | bintime2timespec(&bt, &ts); |
---|
569 | printf( |
---|
570 | "processor %zu delta %lins, read-modify-write count %i\n", |
---|
571 | i, |
---|
572 | ts.tv_nsec, |
---|
573 | ctx->rmw_count[i] |
---|
574 | ); |
---|
575 | } |
---|
576 | } |
---|
577 | |
---|
578 | static const rtems_test_parallel_job test_jobs[] = { |
---|
579 | { |
---|
580 | .init = test_atomic_add_init, |
---|
581 | .body = test_atomic_add_body, |
---|
582 | .fini = test_atomic_add_fini |
---|
583 | }, { |
---|
584 | .init = test_atomic_flag_init, |
---|
585 | .body = test_atomic_flag_body, |
---|
586 | .fini = test_atomic_flag_fini |
---|
587 | }, { |
---|
588 | .init = test_atomic_sub_init, |
---|
589 | .body = test_atomic_sub_body, |
---|
590 | .fini = test_atomic_sub_fini |
---|
591 | }, { |
---|
592 | .init = test_atomic_compare_exchange_init, |
---|
593 | .body = test_atomic_compare_exchange_body, |
---|
594 | .fini = test_atomic_compare_exchange_fini |
---|
595 | }, { |
---|
596 | .init = test_atomic_or_and_init, |
---|
597 | .body = test_atomic_or_and_body, |
---|
598 | .fini = test_atomic_or_and_fini |
---|
599 | }, { |
---|
600 | .init = test_atomic_fence_init, |
---|
601 | .body = test_atomic_fence_body, |
---|
602 | .fini = test_atomic_fence_fini |
---|
603 | }, { |
---|
604 | .init = test_atomic_store_load_rmw_init, |
---|
605 | .body = test_atomic_store_load_rmw_body, |
---|
606 | .fini = test_atomic_store_load_rmw_fini |
---|
607 | } |
---|
608 | }; |
---|
609 | |
---|
610 | static void setup_worker( |
---|
611 | rtems_test_parallel_context *base, |
---|
612 | size_t worker_index, |
---|
613 | rtems_id worker_id |
---|
614 | ) |
---|
615 | { |
---|
616 | rtems_status_code sc; |
---|
617 | rtems_task_priority prio; |
---|
618 | |
---|
619 | sc = rtems_task_set_priority(worker_id, WORKER_PRIORITY, &prio); |
---|
620 | rtems_test_assert(sc == RTEMS_SUCCESSFUL); |
---|
621 | } |
---|
622 | |
---|
623 | static void Init(rtems_task_argument arg) |
---|
624 | { |
---|
625 | smpatomic01_context *ctx = &test_instance; |
---|
626 | |
---|
627 | TEST_BEGIN(); |
---|
628 | |
---|
629 | rtems_test_parallel( |
---|
630 | &ctx->base, |
---|
631 | setup_worker, |
---|
632 | &test_jobs[0], |
---|
633 | RTEMS_ARRAY_SIZE(test_jobs) |
---|
634 | ); |
---|
635 | |
---|
636 | TEST_END(); |
---|
637 | rtems_test_exit(0); |
---|
638 | } |
---|
639 | |
---|
640 | #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER |
---|
641 | #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER |
---|
642 | |
---|
643 | #define CONFIGURE_MICROSECONDS_PER_TICK (MS_PER_TICK * 1000) |
---|
644 | |
---|
645 | #define CONFIGURE_SMP_APPLICATION |
---|
646 | |
---|
647 | #define CONFIGURE_SMP_MAXIMUM_PROCESSORS CPU_COUNT |
---|
648 | |
---|
649 | #define CONFIGURE_MAXIMUM_TASKS CPU_COUNT |
---|
650 | |
---|
651 | #define CONFIGURE_MAXIMUM_TIMERS 1 |
---|
652 | |
---|
653 | #define CONFIGURE_INIT_TASK_PRIORITY MASTER_PRIORITY |
---|
654 | #define CONFIGURE_INIT_TASK_INITIAL_MODES RTEMS_DEFAULT_MODES |
---|
655 | #define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_DEFAULT_ATTRIBUTES |
---|
656 | |
---|
657 | #define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION |
---|
658 | |
---|
659 | #define CONFIGURE_RTEMS_INIT_TASKS_TABLE |
---|
660 | |
---|
661 | #define CONFIGURE_INIT |
---|
662 | |
---|
663 | #include <rtems/confdefs.h> |
---|