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 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.org/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #ifdef HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/score/smplock.h> |
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20 | #include <rtems/score/smplockmcs.h> |
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21 | #include <rtems/score/smplockseq.h> |
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22 | #include <rtems/score/smpbarrier.h> |
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23 | #include <rtems/score/atomic.h> |
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24 | #include <rtems.h> |
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25 | |
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26 | #include "tmacros.h" |
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27 | |
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28 | const char rtems_test_name[] = "SMPLOCK 1"; |
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29 | |
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30 | #define TASK_PRIORITY 1 |
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31 | |
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32 | #define CPU_COUNT 32 |
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33 | |
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34 | #define TEST_COUNT 11 |
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35 | |
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36 | typedef enum { |
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37 | INITIAL, |
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38 | START_TEST, |
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39 | STOP_TEST |
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40 | } states; |
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41 | |
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42 | typedef struct { |
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43 | Atomic_Uint state; |
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44 | SMP_barrier_Control barrier; |
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45 | rtems_id timer_id; |
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46 | rtems_interval timeout; |
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47 | unsigned long counter[TEST_COUNT]; |
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48 | unsigned long test_counter[TEST_COUNT][CPU_COUNT]; |
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49 | SMP_lock_Control lock; |
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50 | #if defined(RTEMS_PROFILING) |
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51 | SMP_lock_Stats mcs_stats; |
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52 | #endif |
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53 | SMP_MCS_lock_Control mcs_lock; |
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54 | SMP_sequence_lock_Control seq_lock; |
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55 | char unused_space_for_cache_line_separation_0[128]; |
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56 | int a; |
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57 | char unused_space_for_cache_line_separation_1[128]; |
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58 | int b; |
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59 | } global_context; |
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60 | |
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61 | static global_context context = { |
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62 | .state = ATOMIC_INITIALIZER_UINT(INITIAL), |
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63 | .barrier = SMP_BARRIER_CONTROL_INITIALIZER, |
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64 | .lock = SMP_LOCK_INITIALIZER("global ticket"), |
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65 | #if defined(RTEMS_PROFILING) |
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66 | .mcs_stats = SMP_LOCK_STATS_INITIALIZER("global MCS"), |
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67 | #endif |
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68 | .mcs_lock = SMP_MCS_LOCK_INITIALIZER, |
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69 | .seq_lock = SMP_SEQUENCE_LOCK_INITIALIZER |
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70 | }; |
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71 | |
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72 | static const char * const test_names[TEST_COUNT] = { |
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73 | "global ticket lock with local counter", |
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74 | "global MCS lock with local counter", |
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75 | "global ticket lock with global counter", |
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76 | "global MCS lock with global counter", |
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77 | "local ticket lock with local counter", |
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78 | "local MCS lock with local counter", |
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79 | "local ticket lock with global counter", |
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80 | "local MCS lock with global counter", |
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81 | "global ticket lock with busy section", |
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82 | "global MCS lock with busy section", |
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83 | "sequence lock" |
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84 | }; |
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85 | |
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86 | static void stop_test_timer(rtems_id timer_id, void *arg) |
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87 | { |
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88 | global_context *ctx = arg; |
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89 | |
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90 | _Atomic_Store_uint(&ctx->state, STOP_TEST, ATOMIC_ORDER_RELEASE); |
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91 | } |
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92 | |
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93 | static void wait_for_state(global_context *ctx, int desired_state) |
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94 | { |
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95 | while ( |
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96 | _Atomic_Load_uint(&ctx->state, ATOMIC_ORDER_ACQUIRE) != desired_state |
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97 | ) { |
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98 | /* Wait */ |
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99 | } |
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100 | } |
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101 | |
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102 | static bool assert_state(global_context *ctx, int desired_state) |
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103 | { |
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104 | return _Atomic_Load_uint(&ctx->state, ATOMIC_ORDER_RELAXED) == desired_state; |
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105 | } |
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106 | |
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107 | typedef void (*test_body)( |
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108 | int test, |
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109 | global_context *ctx, |
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110 | SMP_barrier_State *bs, |
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111 | unsigned int cpu_count, |
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112 | unsigned int cpu_self |
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113 | ); |
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114 | |
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115 | static void test_0_body( |
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116 | int test, |
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117 | global_context *ctx, |
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118 | SMP_barrier_State *bs, |
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119 | unsigned int cpu_count, |
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120 | unsigned int cpu_self |
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121 | ) |
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122 | { |
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123 | unsigned long counter = 0; |
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124 | SMP_lock_Context lock_context; |
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125 | |
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126 | while (assert_state(ctx, START_TEST)) { |
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127 | _SMP_lock_Acquire(&ctx->lock, &lock_context); |
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128 | _SMP_lock_Release(&ctx->lock, &lock_context); |
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129 | ++counter; |
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130 | } |
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131 | |
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132 | ctx->test_counter[test][cpu_self] = counter; |
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133 | } |
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134 | |
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135 | static void test_1_body( |
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136 | int test, |
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137 | global_context *ctx, |
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138 | SMP_barrier_State *bs, |
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139 | unsigned int cpu_count, |
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140 | unsigned int cpu_self |
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141 | ) |
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142 | { |
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143 | unsigned long counter = 0; |
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144 | SMP_MCS_lock_Context lock_context; |
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145 | |
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146 | while (assert_state(ctx, START_TEST)) { |
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147 | _SMP_MCS_lock_Acquire(&ctx->mcs_lock, &lock_context, &ctx->mcs_stats); |
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148 | _SMP_MCS_lock_Release(&ctx->mcs_lock, &lock_context); |
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149 | ++counter; |
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150 | } |
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151 | |
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152 | ctx->test_counter[test][cpu_self] = counter; |
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153 | } |
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154 | |
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155 | static void test_2_body( |
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156 | int test, |
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157 | global_context *ctx, |
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158 | SMP_barrier_State *bs, |
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159 | unsigned int cpu_count, |
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160 | unsigned int cpu_self |
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161 | ) |
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162 | { |
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163 | unsigned long counter = 0; |
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164 | SMP_lock_Context lock_context; |
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165 | |
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166 | while (assert_state(ctx, START_TEST)) { |
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167 | _SMP_lock_Acquire(&ctx->lock, &lock_context); |
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168 | ++ctx->counter[test]; |
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169 | _SMP_lock_Release(&ctx->lock, &lock_context); |
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170 | ++counter; |
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171 | } |
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172 | |
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173 | ctx->test_counter[test][cpu_self] = counter; |
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174 | } |
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175 | |
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176 | static void test_3_body( |
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177 | int test, |
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178 | global_context *ctx, |
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179 | SMP_barrier_State *bs, |
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180 | unsigned int cpu_count, |
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181 | unsigned int cpu_self |
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182 | ) |
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183 | { |
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184 | unsigned long counter = 0; |
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185 | SMP_MCS_lock_Context lock_context; |
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186 | |
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187 | while (assert_state(ctx, START_TEST)) { |
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188 | _SMP_MCS_lock_Acquire(&ctx->mcs_lock, &lock_context, &ctx->mcs_stats); |
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189 | ++ctx->counter[test]; |
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190 | _SMP_MCS_lock_Release(&ctx->mcs_lock, &lock_context); |
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191 | ++counter; |
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192 | } |
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193 | |
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194 | ctx->test_counter[test][cpu_self] = counter; |
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195 | } |
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196 | |
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197 | static void test_4_body( |
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198 | int test, |
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199 | global_context *ctx, |
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200 | SMP_barrier_State *bs, |
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201 | unsigned int cpu_count, |
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202 | unsigned int cpu_self |
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203 | ) |
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204 | { |
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205 | unsigned long counter = 0; |
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206 | SMP_lock_Control lock; |
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207 | SMP_lock_Context lock_context; |
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208 | |
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209 | _SMP_lock_Initialize(&lock, "local"); |
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210 | |
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211 | while (assert_state(ctx, START_TEST)) { |
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212 | _SMP_lock_Acquire(&lock, &lock_context); |
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213 | _SMP_lock_Release(&lock, &lock_context); |
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214 | ++counter; |
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215 | } |
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216 | |
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217 | _SMP_lock_Destroy(&lock); |
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218 | |
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219 | ctx->test_counter[test][cpu_self] = counter; |
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220 | } |
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221 | |
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222 | static void test_5_body( |
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223 | int test, |
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224 | global_context *ctx, |
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225 | SMP_barrier_State *bs, |
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226 | unsigned int cpu_count, |
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227 | unsigned int cpu_self |
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228 | ) |
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229 | { |
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230 | unsigned long counter = 0; |
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231 | #if defined(RTEMS_PROFILING) |
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232 | SMP_lock_Stats stats; |
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233 | #endif |
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234 | SMP_MCS_lock_Control lock; |
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235 | SMP_MCS_lock_Context lock_context; |
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236 | |
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237 | _SMP_lock_Stats_initialize(&stats, "local"); |
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238 | _SMP_MCS_lock_Initialize(&lock); |
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239 | |
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240 | while (assert_state(ctx, START_TEST)) { |
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241 | _SMP_MCS_lock_Acquire(&lock, &lock_context, &stats); |
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242 | _SMP_MCS_lock_Release(&lock, &lock_context); |
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243 | ++counter; |
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244 | } |
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245 | |
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246 | _SMP_MCS_lock_Destroy(&lock); |
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247 | _SMP_lock_Stats_destroy(&stats); |
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248 | |
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249 | ctx->test_counter[test][cpu_self] = counter; |
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250 | } |
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251 | |
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252 | static void test_6_body( |
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253 | int test, |
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254 | global_context *ctx, |
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255 | SMP_barrier_State *bs, |
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256 | unsigned int cpu_count, |
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257 | unsigned int cpu_self |
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258 | ) |
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259 | { |
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260 | unsigned long counter = 0; |
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261 | SMP_lock_Control lock; |
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262 | SMP_lock_Context lock_context; |
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263 | |
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264 | _SMP_lock_Initialize(&lock, "local"); |
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265 | |
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266 | while (assert_state(ctx, START_TEST)) { |
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267 | _SMP_lock_Acquire(&lock, &lock_context); |
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268 | |
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269 | /* The counter value is not interesting, only the access to it */ |
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270 | ++ctx->counter[test]; |
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271 | |
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272 | _SMP_lock_Release(&lock, &lock_context); |
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273 | ++counter; |
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274 | } |
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275 | |
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276 | _SMP_lock_Destroy(&lock); |
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277 | |
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278 | ctx->test_counter[test][cpu_self] = counter; |
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279 | } |
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280 | |
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281 | static void test_7_body( |
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282 | int test, |
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283 | global_context *ctx, |
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284 | SMP_barrier_State *bs, |
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285 | unsigned int cpu_count, |
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286 | unsigned int cpu_self |
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287 | ) |
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288 | { |
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289 | unsigned long counter = 0; |
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290 | #if defined(RTEMS_PROFILING) |
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291 | SMP_lock_Stats stats; |
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292 | #endif |
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293 | SMP_MCS_lock_Control lock; |
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294 | SMP_MCS_lock_Context lock_context; |
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295 | |
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296 | _SMP_lock_Stats_initialize(&stats, "local"); |
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297 | _SMP_MCS_lock_Initialize(&lock); |
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298 | |
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299 | while (assert_state(ctx, START_TEST)) { |
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300 | _SMP_MCS_lock_Acquire(&lock, &lock_context, &stats); |
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301 | |
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302 | /* The counter value is not interesting, only the access to it */ |
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303 | ++ctx->counter[test]; |
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304 | |
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305 | _SMP_MCS_lock_Release(&lock, &lock_context); |
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306 | ++counter; |
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307 | } |
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308 | |
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309 | _SMP_MCS_lock_Destroy(&lock); |
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310 | _SMP_lock_Stats_destroy(&stats); |
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311 | |
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312 | ctx->test_counter[test][cpu_self] = counter; |
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313 | } |
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314 | |
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315 | static void busy_section(void) |
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316 | { |
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317 | int i; |
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318 | |
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319 | for (i = 0; i < 101; ++i) { |
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320 | RTEMS_COMPILER_MEMORY_BARRIER(); |
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321 | } |
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322 | } |
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323 | |
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324 | static void test_8_body( |
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325 | int test, |
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326 | global_context *ctx, |
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327 | SMP_barrier_State *bs, |
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328 | unsigned int cpu_count, |
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329 | unsigned int cpu_self |
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330 | ) |
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331 | { |
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332 | unsigned long counter = 0; |
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333 | SMP_lock_Context lock_context; |
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334 | |
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335 | while (assert_state(ctx, START_TEST)) { |
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336 | _SMP_lock_Acquire(&ctx->lock, &lock_context); |
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337 | busy_section(); |
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338 | _SMP_lock_Release(&ctx->lock, &lock_context); |
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339 | ++counter; |
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340 | } |
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341 | |
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342 | ctx->test_counter[test][cpu_self] = counter; |
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343 | } |
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344 | |
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345 | static void test_9_body( |
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346 | int test, |
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347 | global_context *ctx, |
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348 | SMP_barrier_State *bs, |
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349 | unsigned int cpu_count, |
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350 | unsigned int cpu_self |
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351 | ) |
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352 | { |
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353 | unsigned long counter = 0; |
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354 | SMP_MCS_lock_Context lock_context; |
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355 | |
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356 | while (assert_state(ctx, START_TEST)) { |
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357 | _SMP_MCS_lock_Acquire(&ctx->mcs_lock, &lock_context, &ctx->mcs_stats); |
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358 | busy_section(); |
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359 | _SMP_MCS_lock_Release(&ctx->mcs_lock, &lock_context); |
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360 | ++counter; |
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361 | } |
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362 | |
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363 | ctx->test_counter[test][cpu_self] = counter; |
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364 | } |
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365 | |
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366 | static void test_10_body( |
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367 | int test, |
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368 | global_context *ctx, |
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369 | SMP_barrier_State *bs, |
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370 | unsigned int cpu_count, |
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371 | unsigned int cpu_self |
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372 | ) |
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373 | { |
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374 | unsigned long counter = 0; |
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375 | unsigned long seq; |
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376 | |
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377 | if (cpu_self == 0) { |
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378 | while (assert_state(ctx, START_TEST)) { |
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379 | seq = _SMP_sequence_lock_Write_begin(&ctx->seq_lock); |
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380 | |
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381 | ctx->a = counter; |
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382 | ctx->b = counter; |
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383 | |
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384 | _SMP_sequence_lock_Write_end(&ctx->seq_lock, seq); |
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385 | |
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386 | ++counter; |
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387 | } |
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388 | } else { |
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389 | while (assert_state(ctx, START_TEST)) { |
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390 | unsigned long a; |
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391 | unsigned long b; |
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392 | |
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393 | do { |
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394 | seq = _SMP_sequence_lock_Read_begin(&ctx->seq_lock); |
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395 | |
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396 | a = ctx->a; |
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397 | b = ctx->b; |
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398 | |
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399 | } while (_SMP_sequence_lock_Read_retry(&ctx->seq_lock, seq)); |
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400 | |
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401 | ++counter; |
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402 | rtems_test_assert(a == b); |
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403 | } |
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404 | } |
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405 | |
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406 | ctx->test_counter[test][cpu_self] = counter; |
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407 | } |
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408 | |
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409 | static const test_body test_bodies[TEST_COUNT] = { |
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410 | test_0_body, |
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411 | test_1_body, |
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412 | test_2_body, |
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413 | test_3_body, |
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414 | test_4_body, |
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415 | test_5_body, |
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416 | test_6_body, |
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417 | test_7_body, |
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418 | test_8_body, |
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419 | test_9_body, |
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420 | test_10_body |
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421 | }; |
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422 | |
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423 | static void run_tests( |
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424 | global_context *ctx, |
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425 | SMP_barrier_State *bs, |
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426 | unsigned int cpu_count, |
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427 | unsigned int cpu_self, |
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428 | bool master |
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429 | ) |
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430 | { |
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431 | int test; |
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432 | |
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433 | for (test = 0; test < TEST_COUNT; ++test) { |
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434 | _SMP_barrier_Wait(&ctx->barrier, bs, cpu_count); |
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435 | |
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436 | if (master) { |
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437 | rtems_status_code sc = rtems_timer_fire_after( |
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438 | ctx->timer_id, |
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439 | ctx->timeout, |
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440 | stop_test_timer, |
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441 | ctx |
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442 | ); |
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443 | rtems_test_assert(sc == RTEMS_SUCCESSFUL); |
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444 | |
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445 | _Atomic_Store_uint(&ctx->state, START_TEST, ATOMIC_ORDER_RELEASE); |
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446 | } |
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447 | |
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448 | wait_for_state(ctx, START_TEST); |
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449 | |
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450 | (*test_bodies[test])(test, ctx, bs, cpu_count, cpu_self); |
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451 | } |
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452 | |
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453 | _SMP_barrier_Wait(&ctx->barrier, bs, cpu_count); |
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454 | } |
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455 | |
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456 | static void task(rtems_task_argument arg) |
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457 | { |
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458 | global_context *ctx = (global_context *) arg; |
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459 | uint32_t cpu_count = rtems_get_processor_count(); |
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460 | uint32_t cpu_self = rtems_get_current_processor(); |
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461 | rtems_status_code sc; |
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462 | SMP_barrier_State bs = SMP_BARRIER_STATE_INITIALIZER; |
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463 | |
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464 | run_tests(ctx, &bs, cpu_count, cpu_self, false); |
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465 | |
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466 | sc = rtems_task_suspend(RTEMS_SELF); |
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467 | rtems_test_assert(sc == RTEMS_SUCCESSFUL); |
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468 | } |
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469 | |
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470 | static void test(void) |
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471 | { |
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472 | global_context *ctx = &context; |
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473 | uint32_t cpu_count = rtems_get_processor_count(); |
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474 | uint32_t cpu_self = rtems_get_current_processor(); |
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475 | uint32_t cpu; |
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476 | int test; |
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477 | rtems_status_code sc; |
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478 | SMP_barrier_State bs = SMP_BARRIER_STATE_INITIALIZER; |
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479 | |
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480 | for (cpu = 0; cpu < cpu_count; ++cpu) { |
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481 | if (cpu != cpu_self) { |
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482 | rtems_id task_id; |
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483 | |
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484 | sc = rtems_task_create( |
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485 | rtems_build_name('T', 'A', 'S', 'K'), |
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486 | TASK_PRIORITY, |
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487 | RTEMS_MINIMUM_STACK_SIZE, |
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488 | RTEMS_DEFAULT_MODES, |
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489 | RTEMS_DEFAULT_ATTRIBUTES, |
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490 | &task_id |
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491 | ); |
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492 | rtems_test_assert(sc == RTEMS_SUCCESSFUL); |
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493 | |
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494 | sc = rtems_task_start(task_id, task, (rtems_task_argument) ctx); |
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495 | rtems_test_assert(sc == RTEMS_SUCCESSFUL); |
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496 | } |
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497 | } |
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498 | |
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499 | ctx->timeout = 5 * rtems_clock_get_ticks_per_second(); |
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500 | |
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501 | sc = rtems_timer_create(rtems_build_name('T', 'I', 'M', 'R'), &ctx->timer_id); |
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502 | rtems_test_assert(sc == RTEMS_SUCCESSFUL); |
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503 | |
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504 | run_tests(ctx, &bs, cpu_count, cpu_self, true); |
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505 | |
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506 | for (test = 0; test < TEST_COUNT; ++test) { |
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507 | unsigned long sum = 0; |
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508 | |
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509 | printf("%s\n", test_names[test]); |
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510 | |
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511 | for (cpu = 0; cpu < cpu_count; ++cpu) { |
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512 | unsigned long local_counter = ctx->test_counter[test][cpu]; |
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513 | |
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514 | sum += local_counter; |
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515 | |
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516 | printf( |
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517 | "\tprocessor %" PRIu32 ", local counter %lu\n", |
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518 | cpu, |
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519 | local_counter |
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520 | ); |
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521 | } |
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522 | |
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523 | printf( |
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524 | "\tglobal counter %lu, sum of local counter %lu\n", |
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525 | ctx->counter[test], |
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526 | sum |
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527 | ); |
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528 | } |
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529 | } |
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530 | |
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531 | static void Init(rtems_task_argument arg) |
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532 | { |
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533 | TEST_BEGIN(); |
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534 | |
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535 | test(); |
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536 | |
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537 | TEST_END(); |
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538 | rtems_test_exit(0); |
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539 | } |
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540 | |
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541 | #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER |
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542 | #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER |
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543 | |
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544 | #define CONFIGURE_SMP_APPLICATION |
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545 | |
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546 | #define CONFIGURE_SMP_MAXIMUM_PROCESSORS CPU_COUNT |
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547 | |
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548 | #define CONFIGURE_MAXIMUM_TASKS CPU_COUNT |
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549 | |
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550 | #define CONFIGURE_MAXIMUM_SEMAPHORES 1 |
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551 | |
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552 | #define CONFIGURE_MAXIMUM_TIMERS 1 |
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553 | |
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554 | #define CONFIGURE_INIT_TASK_PRIORITY TASK_PRIORITY |
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555 | #define CONFIGURE_INIT_TASK_INITIAL_MODES RTEMS_DEFAULT_MODES |
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556 | #define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_DEFAULT_ATTRIBUTES |
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557 | |
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558 | #define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION |
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559 | |
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560 | #define CONFIGURE_RTEMS_INIT_TASKS_TABLE |
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561 | |
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562 | #define CONFIGURE_INIT |
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563 | |
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564 | #include <rtems/confdefs.h> |
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