1 | /////////////////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : main.c (for transpose application) |
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3 | // Date : february 2014 |
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4 | // author : Alain Greiner |
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5 | // |
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6 | // This application makes a transpose for a NN*NN pixels sequence of images. |
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7 | // The image sequence is read from a file (one byte per pixel). |
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8 | // The input and output buffers containing the image are distributed in all clusters. |
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9 | // |
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10 | // - The image size NN must be a power of 2. |
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11 | // - The number of clusters containing processors must be a power of 2. |
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12 | // - The number of processors per cluster (NB_PROCS_MAX) must be a power of 2. |
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13 | // - The image size NN must be larger or equal to the total number of processor. |
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14 | // |
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15 | // For each image the application makes a self test (checksum for each line). |
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16 | // The actual display on the frame buffer is optional (controled by DISPLAY_OK define) |
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17 | /////////////////////////////////////////////////////////////////////////////////////////////// |
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18 | |
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19 | #include "hard_config.h" |
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20 | #include "stdio.h" |
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21 | #include "barrier.h" |
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22 | |
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23 | #define NN 128 // image size : nlines = npixels = 128 |
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24 | #define NB_IMAGES 5 // number of images to be handled |
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25 | #define FILE_PATHNAME "misc/images.raw" // file pathname on disk |
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26 | |
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27 | #define INSTRUMENTATION_OK 0 // display statistics on TTY when non zero |
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28 | |
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29 | /////////////////////////////////////////////////////// |
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30 | // global variables stored in seg_data in cluster(0,0) |
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31 | /////////////////////////////////////////////////////// |
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32 | |
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33 | // instrumentation counters |
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34 | // for each processor (up to 4 processors) |
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35 | // in each cluster (up to 32 clusters) |
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36 | unsigned int LOAD_START[32][4]; |
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37 | unsigned int LOAD_END [32][4]; |
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38 | unsigned int TRSP_START[32][4]; |
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39 | unsigned int TRSP_END [32][4]; |
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40 | unsigned int DISP_START[32][4]; |
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41 | unsigned int DISP_END [32][4]; |
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42 | |
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43 | // arrays of pointers on distributed buffers |
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44 | // one input buffer & one output buffer per cluster |
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45 | unsigned char* buf_in [32]; |
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46 | unsigned char* buf_out[32]; |
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47 | |
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48 | // checksum variables |
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49 | unsigned check_line_before[NN]; |
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50 | unsigned check_line_after[NN]; |
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51 | |
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52 | // synchronisation barriers |
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53 | giet_barrier_t barrier_0; |
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54 | giet_barrier_t barrier_1; |
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55 | giet_barrier_t barrier_2; |
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56 | giet_barrier_t barrier_3; |
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57 | giet_barrier_t barrier_4; |
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58 | giet_barrier_t barrier_5; |
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59 | |
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60 | volatile unsigned int init_ok = 1; |
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61 | |
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62 | ////////////////////////////////////////// |
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63 | __attribute__ ((constructor)) void main() |
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64 | { |
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65 | |
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66 | int file; // file descriptor |
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67 | unsigned int l; // line index for loops |
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68 | unsigned int p; // pixel index for loops |
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69 | |
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70 | unsigned int proc_id = giet_procid(); // global processor id |
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71 | unsigned int lpid = proc_id % NB_PROCS_MAX; // local processor id |
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72 | unsigned int cluster_xy = proc_id / NB_PROCS_MAX; // cluster index (8 bits format) |
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73 | unsigned int x = cluster_xy >> Y_WIDTH; // x coordinate |
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74 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); // y coordinate |
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75 | |
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76 | unsigned int npixels = NN * NN; // pixels per image |
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77 | unsigned int nblocks = npixels / 512; // blocks per image |
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78 | unsigned int image = 0; // image counter |
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79 | |
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80 | unsigned int nclusters = X_SIZE * Y_SIZE; // clusters with procs |
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81 | unsigned int cluster_id = (x * Y_SIZE) + y; // "continuous" cluster index |
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82 | unsigned int ntasks = nclusters * NB_PROCS_MAX; // number of tasks |
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83 | unsigned int task_id = (cluster_id * NB_PROCS_MAX) + lpid; // "continuous" task index |
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84 | |
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85 | // processor [0,0,0] makes parameters checking and barriers initialization |
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86 | if ( proc_id == 0 ) |
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87 | { |
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88 | if ((NB_PROCS_MAX != 1) && (NB_PROCS_MAX != 2) && (NB_PROCS_MAX != 4)) |
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89 | { |
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90 | giet_exit("[TRANSPOSE ERROR] NB_PROCS_MAX must be 1, 2 or 4"); |
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91 | } |
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92 | if ((nclusters != 1) && (nclusters != 2) && (nclusters != 4) && (nclusters != 8) && |
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93 | (nclusters != 16) && (nclusters != 32) ) |
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94 | { |
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95 | giet_exit("[TRANSPOSE ERROR] number of clusters must be 2,4,8,16,32"); |
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96 | } |
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97 | if ( ntasks > NN ) |
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98 | { |
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99 | giet_exit("[TRANSPOSE ERROR] number of tasks larger than number of lines"); |
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100 | } |
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101 | |
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102 | barrier_init( &barrier_0, ntasks ); |
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103 | barrier_init( &barrier_1, ntasks ); |
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104 | barrier_init( &barrier_2, ntasks ); |
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105 | barrier_init( &barrier_3, ntasks ); |
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106 | barrier_init( &barrier_4, ntasks ); |
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107 | barrier_init( &barrier_5, ntasks ); |
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108 | |
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109 | giet_shr_printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes barrier init at cycle %d\n", |
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110 | x, y, lpid, giet_proctime() ); |
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111 | |
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112 | giet_shr_printf(" - x_size = %d\n", X_SIZE ); |
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113 | giet_shr_printf(" - y_size = %d\n", Y_SIZE ); |
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114 | giet_shr_printf(" - y_size = %d\n", Y_SIZE ); |
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115 | giet_shr_printf(" - nprocs = %d\n", NB_PROCS_MAX ); |
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116 | giet_shr_printf(" - nclusters = %d\n", nclusters ); |
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117 | giet_shr_printf(" - ntasks = %d\n", ntasks ); |
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118 | |
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119 | init_ok = 0; |
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120 | } |
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121 | else // others processors wait initialisation completion |
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122 | { |
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123 | while ( init_ok == 1 ); |
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124 | } |
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125 | |
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126 | // The buffers containing the images are distributed in clusters |
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127 | // (one buf_in and one buf_out per cluster). |
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128 | // Each buffer contains (NN*NN / nclusters) bytes. |
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129 | // They are allocated in the cluster[x,y] heap by processor[x,y,0] |
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130 | if ( lpid == 0 ) |
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131 | { |
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132 | // get heap vaddr in cluster[0,0] |
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133 | unsigned int heap_base; |
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134 | giet_vobj_get_vbase( "transpose", "trsp_heap_0_0", &heap_base ); |
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135 | |
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136 | // allocate buffers in cluster[x,y] |
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137 | buf_in[cluster_id] = ((unsigned char*)heap_base) + (cluster_xy << 20); |
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138 | buf_out[cluster_id] = buf_in[cluster_id] + NN*NN/nclusters; |
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139 | |
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140 | giet_shr_printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes buffer allocation at cycle %d\n" |
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141 | " - buf_in = %x\n" |
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142 | " - buf_out = %x\n", |
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143 | x, y, 0, giet_proctime(), |
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144 | (unsigned int)buf_in[cluster_id], |
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145 | (unsigned int)buf_out[cluster_id] ); |
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146 | |
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147 | // open file containing images |
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148 | file = giet_fat_open( "misc/images.raw", 0); |
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149 | |
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150 | if (file < 0) |
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151 | { |
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152 | giet_shr_printf("[TRANSPOSE ERROR] Processor[%d,%d,%d]" |
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153 | " cannot open file misc/images.raw", |
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154 | x, y, lpid ); |
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155 | giet_exit(" open() failure"); |
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156 | } |
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157 | else |
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158 | { |
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159 | giet_shr_printf("\n[TRANSPOSE] Processor[%d,%d,%d]" |
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160 | " open file misc/images.raw\n", |
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161 | x, y, lpid ); |
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162 | } |
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163 | } |
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164 | |
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165 | /////////////////////////// |
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166 | barrier_wait( &barrier_0 ); |
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167 | |
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168 | // Main loop (on images) |
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169 | while (image < NB_IMAGES) |
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170 | { |
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171 | // pseudo parallel load from disk to buf_in buffer : nblocks/nclusters blocks |
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172 | // only task running on processor with (lpid == 0) does it |
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173 | |
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174 | LOAD_START[cluster_id][lpid] = giet_proctime(); |
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175 | |
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176 | if (lpid == 0) |
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177 | { |
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178 | giet_fat_read( file, |
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179 | buf_in[cluster_id], |
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180 | (nblocks / nclusters), |
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181 | ((image*nblocks) + ((nblocks*cluster_id)/nclusters)) ); |
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182 | |
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183 | giet_shr_printf("\n[TRANSPOSE] Proc [%d,%d,0] completes load" |
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184 | " for image %d at cycle %d\n", |
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185 | x, y, image, giet_proctime() ); |
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186 | } |
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187 | |
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188 | LOAD_END[cluster_id][lpid] = giet_proctime(); |
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189 | |
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190 | /////////////////////////// |
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191 | barrier_wait( &barrier_1 ); |
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192 | |
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193 | // parallel transpose from buf_in to buf_out |
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194 | // each task makes the transposition for nlt lines (nlt = NN/ntasks) |
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195 | // from line [task_id*nlt] to line [(task_id + 1)*nlt - 1] |
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196 | // (p,l) are the absolute pixel coordinates in the source image |
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197 | |
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198 | |
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199 | TRSP_START[cluster_id][lpid] = giet_proctime(); |
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200 | |
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201 | unsigned int nlt = NN / ntasks; // number of lines per task |
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202 | unsigned int nlc = NN / nclusters; // number of lines per cluster |
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203 | |
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204 | unsigned int src_cluster; |
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205 | unsigned int src_index; |
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206 | unsigned int dst_cluster; |
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207 | unsigned int dst_index; |
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208 | |
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209 | unsigned char byte; |
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210 | |
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211 | unsigned int first = task_id * nlt; // first line index for a given task |
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212 | unsigned int last = first + nlt; // last line index for a given task |
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213 | |
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214 | for ( l = first ; l < last ; l++ ) |
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215 | { |
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216 | check_line_before[l] = 0; |
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217 | |
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218 | // in each iteration we transfer one byte |
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219 | for ( p = 0 ; p < NN ; p++ ) |
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220 | { |
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221 | // read one byte from local buf_in |
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222 | src_cluster = l / nlc; |
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223 | src_index = (l % nlc)*NN + p; |
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224 | byte = buf_in[src_cluster][src_index]; |
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225 | |
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226 | // compute checksum |
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227 | check_line_before[l] = check_line_before[l] + byte; |
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228 | |
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229 | // write one byte to remote buf_out |
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230 | dst_cluster = p / nlc; |
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231 | dst_index = (p % nlc)*NN + l; |
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232 | buf_out[dst_cluster][dst_index] = byte; |
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233 | } |
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234 | } |
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235 | |
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236 | if ( lpid == 0 ) |
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237 | { |
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238 | giet_shr_printf("\n[TRANSPOSE] proc [%d,%d,0] completes transpose" |
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239 | " for image %d at cycle %d\n", |
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240 | x, y, image, giet_proctime() ); |
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241 | |
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242 | } |
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243 | TRSP_END[cluster_id][lpid] = giet_proctime(); |
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244 | |
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245 | /////////////////////////// |
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246 | barrier_wait( &barrier_2 ); |
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247 | |
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248 | // optional parallel display from local buf_out to frame buffer |
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249 | // all processors contribute to display using memcpy... |
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250 | |
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251 | if ( USE_FBF ) // external frame buffer available |
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252 | { |
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253 | DISP_START[cluster_id][lpid] = giet_proctime(); |
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254 | |
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255 | unsigned int npt = npixels / ntasks; // number of pixels per task |
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256 | |
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257 | giet_fb_sync_write( npt * task_id, |
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258 | &buf_out[cluster_id][lpid*npt], |
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259 | npt ); |
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260 | |
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261 | if ( lpid == 0 ) |
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262 | { |
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263 | giet_shr_printf("\n[TRANSPOSE] Proc [%d,%d,0] completes display" |
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264 | " for image %d at cycle %d\n", |
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265 | x, y, image, giet_proctime() ); |
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266 | } |
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267 | |
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268 | DISP_END[cluster_id][lpid] = giet_proctime(); |
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269 | |
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270 | /////////////////////////// |
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271 | barrier_wait( &barrier_3 ); |
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272 | } |
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273 | |
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274 | // checksum done by processor (lpid == 0) in each cluster |
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275 | |
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276 | if ( lpid == 0 ) |
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277 | { |
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278 | unsigned int success = 1; |
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279 | unsigned int start = cluster_id * nlc; |
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280 | unsigned int stop = start + nlc; |
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281 | |
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282 | for ( l = start ; l < stop ; l++ ) |
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283 | { |
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284 | check_line_after[l] = 0; |
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285 | |
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286 | for ( p = 0 ; p < NN ; p++ ) |
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287 | { |
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288 | // read one byte in remote buffer |
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289 | src_cluster = p / nlc; |
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290 | src_index = (p % nlc)*NN + l; |
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291 | |
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292 | unsigned char byte = buf_out[src_cluster][src_index]; |
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293 | |
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294 | check_line_after[l] = check_line_after[l] + byte; |
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295 | } |
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296 | |
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297 | if ( check_line_before[l] != check_line_after[l] ) success = 0; |
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298 | } |
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299 | |
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300 | if ( success ) |
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301 | { |
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302 | giet_shr_printf("\n[TRANSPOSE] proc [%d,%d,0] checksum OK" |
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303 | " for image %d at cycle %d\n", |
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304 | x, y, image, giet_proctime() ); |
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305 | } |
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306 | else |
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307 | { |
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308 | giet_shr_printf("\n[TRANSPOSE] proc [%d,%d,0] checksum KO" |
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309 | " for image %d at cycle %d\n", |
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310 | x, y, image, giet_proctime() ); |
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311 | } |
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312 | } |
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313 | |
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314 | /////////////////////////// |
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315 | barrier_wait( &barrier_4 ); |
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316 | |
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317 | // instrumentation done by processor [0,0,0] |
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318 | |
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319 | if ( (proc_id == 0) && INSTRUMENTATION_OK ) |
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320 | { |
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321 | int cc, pp; |
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322 | unsigned int min_load_start = 0xFFFFFFFF; |
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323 | unsigned int max_load_start = 0; |
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324 | unsigned int min_load_ended = 0xFFFFFFFF; |
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325 | unsigned int max_load_ended = 0; |
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326 | unsigned int min_trsp_start = 0xFFFFFFFF; |
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327 | unsigned int max_trsp_start = 0; |
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328 | unsigned int min_trsp_ended = 0xFFFFFFFF; |
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329 | unsigned int max_trsp_ended = 0; |
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330 | unsigned int min_disp_start = 0xFFFFFFFF; |
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331 | unsigned int max_disp_start = 0; |
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332 | unsigned int min_disp_ended = 0xFFFFFFFF; |
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333 | unsigned int max_disp_ended = 0; |
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334 | |
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335 | for (cc = 0; cc < nclusters; cc++) |
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336 | { |
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337 | for (pp = 0; pp < NB_PROCS_MAX; pp++) |
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338 | { |
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339 | if (LOAD_START[cc][pp] < min_load_start) min_load_start = LOAD_START[cc][pp]; |
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340 | if (LOAD_START[cc][pp] > max_load_start) max_load_start = LOAD_START[cc][pp]; |
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341 | if (LOAD_END[cc][pp] < min_load_ended) min_load_ended = LOAD_END[cc][pp]; |
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342 | if (LOAD_END[cc][pp] > max_load_ended) max_load_ended = LOAD_END[cc][pp]; |
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343 | if (TRSP_START[cc][pp] < min_trsp_start) min_trsp_start = TRSP_START[cc][pp]; |
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344 | if (TRSP_START[cc][pp] > max_trsp_start) max_trsp_start = TRSP_START[cc][pp]; |
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345 | if (TRSP_END[cc][pp] < min_trsp_ended) min_trsp_ended = TRSP_END[cc][pp]; |
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346 | if (TRSP_END[cc][pp] > max_trsp_ended) max_trsp_ended = TRSP_END[cc][pp]; |
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347 | if (DISP_START[cc][pp] < min_disp_start) min_disp_start = DISP_START[cc][pp]; |
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348 | if (DISP_START[cc][pp] > max_disp_start) max_disp_start = DISP_START[cc][pp]; |
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349 | if (DISP_END[cc][pp] < min_disp_ended) min_disp_ended = DISP_END[cc][pp]; |
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350 | if (DISP_END[cc][pp] > max_disp_ended) max_disp_ended = DISP_END[cc][pp]; |
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351 | } |
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352 | } |
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353 | |
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354 | giet_shr_printf(" - LOAD_START : min = %d / max = %d / med = %d / delta = %d\n", |
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355 | min_load_start, max_load_start, (min_load_start+max_load_start)/2, |
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356 | max_load_start-min_load_start); |
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357 | |
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358 | giet_shr_printf(" - LOAD_END : min = %d / max = %d / med = %d / delta = %d\n", |
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359 | min_load_ended, max_load_ended, (min_load_ended+max_load_ended)/2, |
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360 | max_load_ended-min_load_ended); |
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361 | |
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362 | giet_shr_printf(" - TRSP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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363 | min_trsp_start, max_trsp_start, (min_trsp_start+max_trsp_start)/2, |
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364 | max_trsp_start-min_trsp_start); |
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365 | |
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366 | giet_shr_printf(" - TRSP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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367 | min_trsp_ended, max_trsp_ended, (min_trsp_ended+max_trsp_ended)/2, |
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368 | max_trsp_ended-min_trsp_ended); |
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369 | |
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370 | giet_shr_printf(" - DISP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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371 | min_disp_start, max_disp_start, (min_disp_start+max_disp_start)/2, |
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372 | max_disp_start-min_disp_start); |
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373 | |
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374 | giet_shr_printf(" - DISP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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375 | min_disp_ended, max_disp_ended, (min_disp_ended+max_disp_ended)/2, |
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376 | max_disp_ended-min_disp_ended); |
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377 | } |
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378 | |
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379 | image++; |
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380 | |
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381 | ////////////////////////////////////////////////// |
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382 | // all tasks must wait instrumentation completion |
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383 | ////////////////////////////////////////////////// |
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384 | barrier_wait( &barrier_5 ); |
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385 | |
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386 | } // end while image |
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387 | |
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388 | giet_exit("Completed"); |
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389 | |
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390 | } // end main() |
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391 | |
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392 | // Local Variables: |
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393 | // tab-width: 3 |
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394 | // c-basic-offset: |
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395 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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396 | // indent-tabs-mode: nil |
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397 | // End: |
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398 | |
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399 | // vim: filetype=cpp:expandtab:shiftwidth=3:tabstop=3:softtabstop=3 |
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400 | |
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401 | |
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402 | |
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