1 | /* |
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2 | * swift_context.c |
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3 | * |
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4 | * (c) 2009 Ionut Rosoiu <ionut.rosoiu@gmail.com> |
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5 | * |
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6 | */ |
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7 | |
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8 | #include <stdio.h> |
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9 | #include <stdlib.h> |
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10 | #include "swift.h" |
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11 | |
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12 | /* datastructures for the two closures */ |
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13 | typedef struct sum_data { |
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14 | int r1; |
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15 | int r2; |
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16 | int *r; |
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17 | } sum_data_t; |
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18 | |
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19 | typedef struct fibo_data { |
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20 | int n; |
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21 | int *r; |
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22 | } fibo_data_t; |
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23 | |
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24 | /* forward declaration for the fibo() */ |
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25 | void fibo(swift_thread_t *thread, swift_frame_t *frame); |
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26 | |
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27 | /* sum(r1, r2, *r) */ |
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28 | void sum(swift_thread_t *thread, swift_frame_t *frame) { |
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29 | swift_status_t status; |
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30 | sum_data_t *data = frame->private_data; |
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31 | |
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32 | SWIFT_LOG_FRAME_INFO_STR("\nsum() ", thread, frame); |
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33 | *data->r = data->r1 + data->r2; |
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34 | |
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35 | SWIFT_LOG(INFO, "[%d] sum(%d, %d)=%d\n", thread->id, data->r1, data->r2, *data->r); |
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36 | swift_signal_frame_done(thread, frame, &status); |
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37 | } |
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38 | |
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39 | /* the function that is called when fibo() ends execution */ |
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40 | inline void fibo_end(swift_thread_t *thread, swift_frame_t *frame) { |
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41 | swift_status_t status; |
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42 | |
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43 | SWIFT_LOG_FRAME_INFO_STR("fibo_end", thread, frame); |
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44 | |
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45 | swift_signal_frame_done(thread, frame, &status); |
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46 | } |
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47 | |
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48 | /* void fibo(int r, shared_w int* r) */ |
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49 | void fibo(swift_thread_t *thread, swift_frame_t *frame) { |
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50 | fibo_data_t *data = frame->private_data; |
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51 | swift_status_t status; |
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52 | swift_size_t n; |
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53 | // sync |
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54 | swift_sync_info_t *sync_frame = NULL; |
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55 | |
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56 | SWIFT_LOG_FRAME_INFO_STR("\nfibo() ", thread, frame); |
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57 | |
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58 | if (data->n < 2) { |
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59 | *data->r = data->n; |
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60 | |
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61 | } else { |
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62 | // fibo(n-1) data |
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63 | swift_frame_t *frame1; |
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64 | fibo_data_t *data1; |
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65 | |
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66 | // fibo(n-2) data |
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67 | swift_frame_t *frame2; |
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68 | fibo_data_t *data2; |
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69 | |
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70 | // sum() data |
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71 | swift_frame_t *frame3; |
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72 | sum_data_t *data3; |
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73 | |
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74 | sync_frame = (swift_sync_info_t*) swift_malloc(sizeof(swift_sync_info_t), &status); |
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75 | swift_sync_frame_init(sync_frame, 3, &status); |
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76 | |
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77 | // sum() private data |
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78 | data3 = (sum_data_t*) swift_malloc(sizeof(sum_data_t), &status); |
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79 | data3->r = data->r; |
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80 | |
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81 | /* spawn fibo(n-1, r1); */ |
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82 | frame1 = (swift_frame_t*) swift_malloc(sizeof(swift_frame_t), &status); |
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83 | frame1->creator_id = thread->id; |
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84 | frame1->closure = fibo; |
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85 | frame1->dbg = data->n - 1; |
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86 | |
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87 | data1 = (fibo_data_t*) swift_malloc(sizeof(fibo_data_t), &status); |
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88 | data1->n = data->n - 1; |
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89 | data1->r = &data3->r1; |
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90 | frame1->private_data = data1; |
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91 | |
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92 | SWIFT_WRITE_FRAME_INFO(frame1, thread->id, 'f', thread->frame_no++); |
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93 | // sync related |
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94 | frame1->finished_handler = fibo_end; |
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95 | frame1->sync_info = sync_frame; |
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96 | |
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97 | /* spawn fibo(n-2, r2); */ |
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98 | frame2 = (swift_frame_t*) swift_malloc(sizeof(swift_frame_t), &status); |
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99 | frame2->creator_id = thread->id; |
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100 | frame2->closure = fibo; |
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101 | frame2->dbg = data->n - 2; |
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102 | |
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103 | data2 = (fibo_data_t*) swift_malloc(sizeof(fibo_data_t), &status); |
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104 | data2->n = data->n - 2; |
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105 | data2->r = &data3->r2; |
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106 | frame2->private_data = data2; |
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107 | |
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108 | SWIFT_WRITE_FRAME_INFO(frame2, thread->id, 'f', thread->frame_no++); |
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109 | frame2->finished_handler = fibo_end; |
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110 | frame2->sync_info = sync_frame; |
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111 | |
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112 | /* spawn sum(r1, r2, r); */ |
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113 | frame3 = (swift_frame_t*) swift_malloc(sizeof(swift_frame_t), &status); |
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114 | frame3->creator_id = thread->id; |
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115 | frame3->closure = sum; |
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116 | frame3->dbg = -data->n; |
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117 | frame3->private_data = data3; |
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118 | |
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119 | frame3->dependencies_no = 2; |
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120 | SWIFT_WRITE_FRAME_INFO(frame3, thread->id, 's', thread->frame_no++); |
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121 | frame3->finished_handler = NULL; |
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122 | frame3->sync_info = sync_frame; |
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123 | |
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124 | // 3 depends on 1 and 2 |
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125 | frame1->dependencies_frame = frame3; |
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126 | frame2->dependencies_frame = frame3; |
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127 | frame3->dependencies_frame = NULL; |
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128 | |
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129 | // add 1 & 2 in the workque (3 will be added when 1&2 finish) |
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130 | swift_deque_push(&thread->workque, &thread->workqueTopUpperBound, frame1, &status); |
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131 | swift_deque_push(&thread->workque, &thread->workqueTopUpperBound, frame2, &status); |
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132 | } |
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133 | |
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134 | /* ksync; */ |
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135 | if (sync_frame) { |
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136 | while ((n = SWIFT_ATOMIC_READ(sync_frame->sync_frames_remaining))) { |
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137 | SWIFT_LOG(INFO, "[%d] %s rem=%d c=%d f=%c.%d (%d)\n", thread->id, "@sync", n, |
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138 | SWIFT_PROC(frame->info), SWIFT_FRAME_NAME(frame->info), |
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139 | frame->dbg, SWIFT_FRAME_ID(frame->info)); |
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140 | swift_scheduler_execute(thread, &status); |
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141 | } |
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142 | } |
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143 | |
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144 | if (frame->finished_handler) { |
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145 | frame->finished_handler(thread, frame); |
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146 | } |
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147 | |
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148 | SWIFT_LOG(INFO, "[%d] __fibo(%d)=%d\n", thread->id, data->n, *data->r); |
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149 | |
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150 | swift_retire_frame(frame, &status); |
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151 | if (sync_frame) { |
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152 | swift_mutex_destroy(&sync_frame->sync_mutex, &status); |
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153 | swift_free(sync_frame, &status); |
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154 | } |
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155 | |
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156 | SWIFT_LOG(INFO, "[%d] backoff\n", thread->id); |
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157 | swift_backoff(thread, &status); |
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158 | } |
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159 | |
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160 | void* thread_start(void *arg) { |
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161 | swift_thread_t *thread = arg; |
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162 | swift_status_t status; |
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163 | |
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164 | SWIFT_LOG(INFO, "_____started %d\n", thread->id); |
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165 | swift_scheduler_execute(thread, &status); |
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166 | SWIFT_LOG(INFO, "_____finished %d\n", thread->id); |
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167 | |
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168 | return arg; |
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169 | } |
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170 | |
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171 | int main(int argc, char **argv) { |
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172 | swift_context_t context; |
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173 | swift_status_t status; |
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174 | swift_frame_t *frame; |
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175 | fibo_data_t *data; |
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176 | int i, r; |
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177 | int nthreads, n; |
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178 | |
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179 | if (argc != 3) { |
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180 | fprintf(stderr, "usage: %s Nthreads N\n", argv[0]); |
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181 | abort(); |
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182 | } |
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183 | |
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184 | nthreads = strtol(argv[1], NULL, 10); |
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185 | n = strtol(argv[2], NULL, 10); |
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186 | |
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187 | SWIFT_LOG(INFO, "Started nthreads=%d n=%d\n", nthreads, n); |
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188 | |
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189 | /* initialize the context */ |
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190 | swift_context_init(&context, nthreads, &status); |
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191 | |
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192 | /* push the first frame */ |
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193 | frame = (swift_frame_t*) swift_malloc(sizeof(swift_frame_t), &status); |
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194 | frame->creator_id = 0; |
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195 | frame->closure = fibo; |
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196 | frame->dbg = n; |
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197 | |
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198 | data = (fibo_data_t*) swift_malloc(sizeof(fibo_data_t), &status); |
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199 | data->n = n; |
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200 | data->r = &r; |
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201 | frame->private_data = data; |
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202 | |
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203 | SWIFT_WRITE_FRAME_INFO(frame, 0, 'f', context.threads[0].frame_no++); |
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204 | SWIFT_LOG_FRAME_INFO((&context.threads[0]), frame); |
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205 | |
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206 | // no wait frame |
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207 | frame->dependencies_no = 0; |
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208 | frame->dependencies_frame = NULL; |
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209 | frame->finished_handler = NULL; |
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210 | frame->sync_info = NULL; |
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211 | |
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212 | swift_deque_push(&context.threads[0].workque, &context.threads[0].workqueTopUpperBound, frame, &status); |
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213 | SWIFT_LOG(INFO, "pushed first frame\n"); |
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214 | |
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215 | /* start the threads */ |
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216 | for (i=0; i<nthreads; i++) { |
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217 | swift_thread_start(&context.threads[i], thread_start, &status); |
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218 | } |
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219 | |
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220 | /* wait for the threads to finish */ |
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221 | for (i=0; i<nthreads; i++) { |
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222 | SWIFT_LOG(INFO, "_____waiting %d\n", i); |
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223 | swift_thread_wait(&context.threads[i], &status); |
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224 | SWIFT_LOG(INFO, "_____waiting %d done\n", i); |
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225 | } |
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226 | |
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227 | /* check the result */ |
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228 | printf("computed result for fibo(%d)=%d\n", n, r); |
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229 | swift_context_destroy(&context, &status); |
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230 | |
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231 | return 0; |
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232 | } |
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