1 | #include "stdio.h" |
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2 | |
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3 | #define NL 512 |
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4 | #define NP 512 |
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5 | #define NB_IMAGES 1 |
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6 | #define BLOCK_SIZE 512 |
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7 | |
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8 | #define PRINTF if(local_id == 0) tty_printf |
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9 | |
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10 | /////////////////////////////////////////// |
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11 | // tricks to read parameters from ldscript |
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12 | /////////////////////////////////////////// |
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13 | |
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14 | struct plaf; |
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15 | |
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16 | extern struct plaf seg_heap_base; |
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17 | extern struct plaf NB_PROCS; |
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18 | extern struct plaf NB_CLUSTERS; |
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19 | |
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20 | ///////////// |
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21 | void main() |
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22 | { |
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23 | unsigned int image = 0; |
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24 | unsigned int date = 0; |
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25 | |
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26 | unsigned int c; // cluster index for loops |
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27 | unsigned int l; // line index for loops |
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28 | unsigned int p; // pixel index for loops |
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29 | |
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30 | unsigned int proc_id = procid(); // processor id |
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31 | unsigned int nprocs = (unsigned int)&NB_PROCS; // number of processors per cluster |
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32 | unsigned int nclusters = (unsigned int)&NB_CLUSTERS; // number of clusters |
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33 | unsigned int local_id = proc_id%nprocs; // local processor id |
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34 | unsigned int cluster_id = proc_id/nprocs; // cluster id |
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35 | unsigned int base = (unsigned int)&seg_heap_base; // base address for shared buffers |
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36 | unsigned int increment = (0x80000000 / nclusters) * 2; // cluster increment |
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37 | unsigned int ntasks = nclusters * nprocs; // number of tasks |
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38 | unsigned int nblocks = (NP*NL) / BLOCK_SIZE; // number of blocks per image |
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39 | |
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40 | PRINTF("\n *** Entering main at cycle %d ***\n\n", proctime()); |
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41 | |
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42 | // parameters checking |
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43 | if( (nprocs != 1) && (nprocs != 2) && (nprocs != 4) ) |
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44 | { |
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45 | PRINTF("NB_PROCS must be 1, 2 or 4\n"); |
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46 | } |
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47 | if( (nclusters != 1) && (nclusters != 2) && (nclusters != 4) && (nclusters != 8) && |
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48 | (nclusters != 16) && (nclusters != 32) && (nclusters != 64) && (nclusters !=128) && |
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49 | (nclusters != 256) ) |
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50 | { |
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51 | PRINTF("NB_CLUSTERS must be a power of 1 between 1 and 256\n"); |
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52 | } |
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53 | if( ntasks > 1024 ) |
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54 | { |
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55 | PRINTF("NB_PROCS * NB_CLUSTERS cannot be larger than 1024\n"); |
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56 | } |
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57 | if( proc_id >= ntasks ) |
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58 | { |
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59 | PRINTF("processor id %d larger than NB_CLUSTERS*NB_PROCS\n", proc_id); |
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60 | } |
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61 | |
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62 | // Arrays of pointers on the shared, distributed buffers containing the images |
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63 | // These arrays are indexed by the cluster index (sized for the worst case : 256 clusters) |
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64 | unsigned char* A[256]; |
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65 | unsigned char* B[256]; |
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66 | |
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67 | // Arrays of pointers on the instrumentation arrays |
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68 | // These arrays are indexed by the cluster index (sized for the worst case : 256 clusters) |
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69 | // each pointer points on the base adress of an array of NPROCS unsigned int |
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70 | unsigned int* LOAD_START[256]; |
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71 | unsigned int* LOAD_ENDED[256]; |
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72 | unsigned int* TRSP_START[256]; |
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73 | unsigned int* TRSP_ENDED[256]; |
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74 | unsigned int* DISP_START[256]; |
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75 | unsigned int* DISP_ENDED[256]; |
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76 | |
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77 | // shared buffers address definition |
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78 | // from the seg_heap_base and increment depending on the cluster index |
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79 | // These arrays of pointers are identical and replicated in the stack of each task |
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80 | for( c=0 ; c<nclusters ; c++) |
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81 | { |
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82 | A[c] = (unsigned char*)(base + increment*c); |
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83 | B[c] = (unsigned char*)(base + NL*NP + increment*c); |
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84 | LOAD_START[c] = (unsigned int*) (base + 2*NL*NP + increment*c); |
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85 | LOAD_ENDED[c] = (unsigned int*) (base + 3*NL*NP + increment*c); |
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86 | TRSP_START[c] = (unsigned int*) (base + 4*NL*NP + increment*c); |
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87 | TRSP_ENDED[c] = (unsigned int*) (base + 5*NL*NP + increment*c); |
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88 | DISP_START[c] = (unsigned int*) (base + 6*NL*NP + increment*c); |
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89 | DISP_ENDED[c] = (unsigned int*) (base + 7*NL*NP + increment*c); |
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90 | } |
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91 | |
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92 | PRINTF("NB_CLUSTERS = %d\n", nclusters); |
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93 | PRINTF("NB_PROCS = %d\n\n", nprocs); |
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94 | |
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95 | PRINTF("*** starting barrier init at cycle %d ***\n", proctime()); |
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96 | |
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97 | // barriers initialization |
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98 | barrier_init(0, ntasks); |
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99 | barrier_init(1, ntasks); |
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100 | barrier_init(2, ntasks); |
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101 | |
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102 | PRINTF("*** completing barrier init at cycle %d ***\n", proctime()); |
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103 | |
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104 | // Main loop (on images) |
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105 | while(image < NB_IMAGES) |
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106 | { |
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107 | // pseudo parallel load from disk to A[c] buffer : nblocks/nclusters blocks |
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108 | // only task running on processor with (local_id == 0) does it |
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109 | |
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110 | if ( local_id == 0 ) |
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111 | { |
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112 | int p; |
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113 | |
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114 | date = proctime(); |
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115 | PRINTF("\n*** Starting load for image %d at cycle %d\n", image, date); |
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116 | for ( p=0 ; p<nprocs ; p++ ) LOAD_START[cluster_id][p] = date; |
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117 | |
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118 | if( ioc_read(image*nblocks + nblocks*cluster_id/nclusters , A[cluster_id], nblocks/nclusters) ) |
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119 | { |
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120 | tty_printf("echec ioc_read\n"); |
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121 | exit(); |
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122 | } |
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123 | if ( ioc_completed() ) |
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124 | { |
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125 | tty_printf("echec ioc_completed\n"); |
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126 | exit(); |
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127 | } |
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128 | |
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129 | date = proctime(); |
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130 | PRINTF("*** Completing load for image %d at cycle %d\n", image, date); |
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131 | for ( p=0 ; p<nprocs ; p++ ) LOAD_ENDED[cluster_id][p] = date; |
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132 | } |
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133 | |
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134 | barrier_wait(0); |
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135 | |
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136 | // parallel transpose from A to B buffers |
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137 | // each processor makes the transposition for (NL/ntasks) lines |
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138 | // (p,l) are the (x,y) pixel coordinates in the source image |
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139 | |
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140 | |
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141 | date = proctime(); |
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142 | PRINTF("\n*** Starting transpose for image %d at cycle %d\n", image, date); |
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143 | TRSP_START[cluster_id][local_id] = date; |
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144 | |
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145 | unsigned int nlt = NL/ntasks; |
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146 | unsigned int first = (cluster_id*nprocs + local_id)*nlt; |
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147 | unsigned int last = first + nlt; |
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148 | |
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149 | for ( l=first ; l<last ; l++) |
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150 | { |
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151 | PRINTF( " - processing line %d\n", l); |
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152 | for ( p=0 ; p<NP ; p++) |
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153 | { |
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154 | unsigned int source_cluster = l/(NL/nclusters); |
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155 | unsigned int source_index = (l%(NL/nclusters))*NP + p; |
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156 | unsigned int dest_cluster = p / (NP/nclusters); |
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157 | unsigned int dest_index = (p%(NP/nclusters))*NL + l; |
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158 | B[dest_cluster][dest_index] = A[source_cluster][source_index]; |
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159 | } |
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160 | |
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161 | } |
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162 | date = proctime(); |
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163 | PRINTF("*** Completing transpose for image %d at cycle %d\n", image, date); |
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164 | TRSP_ENDED[cluster_id][local_id] = date; |
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165 | |
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166 | barrier_wait(1); |
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167 | |
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168 | // parallel display from B[c] to frame buffer |
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169 | // each processor uses its private dma to display NL*NP/ntasks pixels |
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170 | |
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171 | date = proctime(); |
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172 | PRINTF("\n*** Starting display for image %d at cycle %d\n", image, date); |
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173 | DISP_START[cluster_id][local_id] = date; |
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174 | |
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175 | unsigned int npxt = NL*NP/ntasks; // number of pixels per task |
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176 | |
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177 | if ( fb_write(npxt*proc_id, B[cluster_id] + npxt*local_id, npxt) ) |
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178 | { |
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179 | PRINTF("echec fb_sync_write\n"); |
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180 | exit(); |
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181 | } |
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182 | if ( fb_completed() ) |
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183 | { |
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184 | PRINTF("echec fb_completed\n"); |
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185 | exit(); |
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186 | } |
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187 | |
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188 | date = proctime(); |
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189 | PRINTF("*** Completing display for image %d at cycle %d\n", image, date); |
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190 | DISP_ENDED[cluster_id][local_id] = date; |
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191 | |
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192 | barrier_wait(2); |
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193 | |
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194 | // Instrumentation (done by processor 0 in cluster 0) |
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195 | if ( local_id == 0 ) |
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196 | { |
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197 | date = proctime(); |
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198 | PRINTF("\n*** Starting Instrumentation for image %d at cycle %d\n\n", image, date); |
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199 | |
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200 | int cc, pp; |
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201 | unsigned int min_load_start = 1000000000; |
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202 | unsigned int max_load_start = 0; |
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203 | unsigned int min_load_ended = 1000000000; |
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204 | unsigned int max_load_ended = 0; |
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205 | unsigned int min_trsp_start = 1000000000; |
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206 | unsigned int max_trsp_start = 0; |
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207 | unsigned int min_trsp_ended = 1000000000; |
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208 | unsigned int max_trsp_ended = 0; |
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209 | unsigned int min_disp_start = 1000000000; |
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210 | unsigned int max_disp_start = 0; |
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211 | unsigned int min_disp_ended = 1000000000; |
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212 | unsigned int max_disp_ended = 0; |
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213 | |
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214 | for ( cc=0 ; cc<nclusters ; cc++ ) |
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215 | { |
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216 | for ( pp=0 ; pp<nprocs ; pp++ ) |
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217 | { |
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218 | if ( LOAD_START[cc][pp] < min_load_start ) min_load_start = LOAD_START[cc][pp]; |
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219 | if ( LOAD_START[cc][pp] > max_load_start ) max_load_start = LOAD_START[cc][pp]; |
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220 | if ( LOAD_ENDED[cc][pp] < min_load_ended ) min_load_ended = LOAD_ENDED[cc][pp]; |
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221 | if ( LOAD_ENDED[cc][pp] > max_load_ended ) max_load_ended = LOAD_ENDED[cc][pp]; |
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222 | |
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223 | if ( TRSP_START[cc][pp] < min_trsp_start ) min_trsp_start = TRSP_START[cc][pp]; |
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224 | if ( TRSP_START[cc][pp] > max_trsp_start ) max_trsp_start = TRSP_START[cc][pp]; |
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225 | if ( TRSP_ENDED[cc][pp] < min_trsp_ended ) min_trsp_ended = TRSP_ENDED[cc][pp]; |
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226 | if ( TRSP_ENDED[cc][pp] > max_trsp_ended ) max_trsp_ended = TRSP_ENDED[cc][pp]; |
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227 | |
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228 | if ( DISP_START[cc][pp] < min_disp_start ) min_disp_start = DISP_START[cc][pp]; |
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229 | if ( DISP_START[cc][pp] > max_disp_start ) max_disp_start = DISP_START[cc][pp]; |
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230 | if ( DISP_ENDED[cc][pp] < min_disp_ended ) min_disp_ended = DISP_ENDED[cc][pp]; |
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231 | if ( DISP_ENDED[cc][pp] > max_disp_ended ) max_disp_ended = DISP_ENDED[cc][pp]; |
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232 | |
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233 | } |
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234 | } |
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235 | PRINTF(" - LOAD_START : min = %d / max = %d / med = %d / delta = %d\n", |
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236 | min_load_start, max_load_start, (min_load_start+max_load_start)/2, max_load_start-min_load_start); |
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237 | PRINTF(" - LOAD_END : min = %d / max = %d / med = %d / delta = %d\n", |
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238 | min_load_ended, max_load_ended, (min_load_ended+max_load_ended)/2, max_load_ended-min_load_ended); |
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239 | |
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240 | PRINTF(" - TRSP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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241 | min_trsp_start, max_trsp_start, (min_trsp_start+max_trsp_start)/2, max_trsp_start-min_trsp_start); |
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242 | PRINTF(" - TRSP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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243 | min_trsp_ended, max_trsp_ended, (min_trsp_ended+max_trsp_ended)/2, max_trsp_ended-min_trsp_ended); |
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244 | |
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245 | PRINTF(" - DISP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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246 | min_disp_start, max_disp_start, (min_disp_start+max_disp_start)/2, max_disp_start-min_disp_start); |
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247 | PRINTF(" - DISP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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248 | min_disp_ended, max_disp_ended, (min_disp_ended+max_disp_ended)/2, max_disp_ended-min_disp_ended); |
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249 | |
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250 | PRINTF(" - BARRIER TRSP/DISP = %d\n", min_disp_start - max_trsp_ended); |
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251 | } |
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252 | // next image |
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253 | image++; |
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254 | |
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255 | } // end while image |
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256 | |
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257 | while(1); |
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258 | } // end main() |
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259 | |
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