1 | /////////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : transpose.c |
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3 | // Date : september 2015 |
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4 | // author : Alain Greiner |
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5 | /////////////////////////////////////////////////////////////////////////////////////// |
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6 | // This multi-threaded aplication transposes a raw image (one pbyte per pixel). |
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7 | // It can run on a multi-processors, multi-clusters architecture, with one thread |
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8 | // per processor, and uses the POSIX threads API. |
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9 | // It does not use the CMA to display the result image. |
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10 | // |
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11 | // The main() function can be launched on any processor P[x,y,l]. |
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12 | // It makes the initialisations, launch (N-1) threads to run the execute() function |
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13 | // on the (N-1) other processors than P[x,y,l], call himself the execute() function, |
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14 | // and finally call the instrument() function to display instrumentation results |
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15 | // when the parallel execution is completed. |
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16 | // |
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17 | // The input and output buffers containing the image are distributed in clusters. |
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18 | // |
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19 | // The execute() function read a set of lines from an input file on disk, |
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20 | // to the local buffer buf_in[x][y], transpose it, write the result to a remote buffer |
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21 | // buf_out[x'][y'], display the content of the local buffer buf_out[x][y] to the |
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22 | // frame buffer, and store it on disk to another output file. |
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23 | // |
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24 | // - The image size must fit the frame buffer size. |
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25 | // - The block size in block device must be 512 bytes. |
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26 | // - The number of clusters must be a power of 2 no larger than 256. |
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27 | // - The number of processors per cluster must be a power of 2 no larger than 4. |
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28 | /////////////////////////////////////////////////////////////////////////////////////// |
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29 | |
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30 | #include "stdio.h" |
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31 | #include "stdlib.h" |
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32 | #include "user_barrier.h" |
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33 | #include "malloc.h" |
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34 | |
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35 | #define BLOCK_SIZE 512 // block size on disk |
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36 | #define X_MAX 16 // max number of clusters in row |
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37 | #define Y_MAX 16 // max number of clusters in column |
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38 | #define PROCS_MAX 4 // max number of procs per cluster |
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39 | #define CLUSTER_MAX (X_MAX * Y_MAX) // max number of clusters |
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40 | #define IMAGE_SIZE 256 // default image size |
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41 | #define INPUT_FILE_PATH "/misc/lena_256.raw" // default input file pathname |
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42 | #define OUTPUT_FILE_PATH "/home/lena_transposed.raw" // default output file pathname |
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43 | #define INTERACTIVE 0 // interactive capture of filenames |
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44 | #define VERBOSE 1 |
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45 | |
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46 | |
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47 | // macro to use a shared TTY |
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48 | #define printf(...); { lock_acquire( &tty_lock ); \ |
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49 | giet_tty_printf(__VA_ARGS__); \ |
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50 | lock_release( &tty_lock ); } |
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51 | |
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52 | /////////////////////////////////////////////////////// |
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53 | // global variables stored in seg_data in cluster(0,0) |
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54 | /////////////////////////////////////////////////////// |
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55 | |
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56 | // instrumentation counters for each processor in each cluster |
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57 | unsigned int LOAD_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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58 | unsigned int LOAD_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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59 | unsigned int TRSP_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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60 | unsigned int TRSP_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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61 | unsigned int DISP_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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62 | unsigned int DISP_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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63 | unsigned int STOR_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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64 | unsigned int STOR_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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65 | |
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66 | // arrays of pointers on distributed buffers |
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67 | // one input buffer & one output buffer per cluster |
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68 | unsigned char* buf_in [CLUSTER_MAX]; |
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69 | unsigned char* buf_out[CLUSTER_MAX]; |
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70 | |
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71 | // checksum variables |
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72 | unsigned check_line_before[1024]; |
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73 | unsigned check_line_after[1024]; |
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74 | |
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75 | // lock protecting shared TTY |
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76 | user_lock_t tty_lock; |
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77 | |
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78 | // synchronisation barrier (all threads) |
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79 | giet_sqt_barrier_t barrier; |
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80 | |
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81 | // input & output files pathname and size |
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82 | char input_file_name[256]; |
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83 | char output_file_name[256]; |
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84 | unsigned int image_size; |
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85 | |
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86 | //////////////////////////////////////////// |
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87 | __attribute__ ((constructor)) void execute() |
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88 | //////////////////////////////////////////// |
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89 | { |
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90 | unsigned int l; // line index for loops |
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91 | unsigned int p; // pixel index for loops |
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92 | |
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93 | // get processor identifiers |
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94 | unsigned int x_id; // x cluster coordinate |
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95 | unsigned int y_id; // y cluster coordinate |
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96 | unsigned int p_id; // local processor index |
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97 | |
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98 | giet_proc_xyp( &x_id, &y_id, &p_id); |
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99 | |
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100 | // get & check plat-form parameters |
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101 | unsigned int x_size; // number of clusters in a row |
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102 | unsigned int y_size; // number of clusters in a column |
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103 | unsigned int nprocs; // number of processors per cluster |
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104 | |
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105 | giet_procs_number( &x_size , &y_size , &nprocs ); |
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106 | |
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107 | unsigned int nclusters = x_size * y_size; // number of clusters |
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108 | unsigned int nthreads = x_size * y_size * nprocs; // number of threads |
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109 | unsigned int npixels = image_size * image_size; // pixels per image |
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110 | int fd_in = 0; // initial file descriptor |
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111 | int fd_out = 0; // output file descriptor |
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112 | unsigned int cluster_id = (x_id * y_size) + y_id; // "continuous" index |
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113 | unsigned int thread_id = (cluster_id * nprocs) + p_id; // "continuous" thread index |
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114 | |
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115 | // parallel load of image: |
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116 | // allocate buf_in and buf_out distributed buffers (one buf_in & one buf_out per cluster). |
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117 | // open input and output files, and load the relevant lines in local buf_in. |
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118 | // only thread running on processor[x,y,0] does it. |
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119 | |
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120 | LOAD_START[x_id][y_id][p_id] = giet_proctime(); |
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121 | |
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122 | if ( p_id == 0 ) |
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123 | { |
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124 | buf_in[cluster_id] = remote_malloc( npixels/nclusters, x_id, y_id ); |
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125 | buf_out[cluster_id] = remote_malloc( npixels/nclusters, x_id, y_id ); |
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126 | |
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127 | if ( (x_id==0) && (y_id==0) ) |
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128 | { |
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129 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes buffer allocation at cycle %d\n", |
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130 | x_id, y_id, p_id, giet_proctime() ); |
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131 | } |
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132 | |
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133 | // open input file |
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134 | fd_in = giet_fat_open( input_file_name , O_RDONLY ); // read_only |
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135 | if ( fd_in < 0 ) |
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136 | { |
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137 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot open file %s\n", |
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138 | x_id , y_id , p_id , input_file_name ); |
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139 | giet_pthread_exit(" open() failure"); |
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140 | } |
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141 | else if ( (x_id==0) && (y_id==0) ) |
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142 | { |
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143 | printf("\n[TRANSPOSE] Proc [0,0,0] open file %s / fd = %d\n", |
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144 | input_file_name , fd_in ); |
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145 | } |
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146 | |
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147 | // open output file |
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148 | fd_out = giet_fat_open( output_file_name , O_CREATE ); // create if required |
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149 | if ( fd_out < 0 ) |
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150 | { |
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151 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot open file %s\n", |
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152 | x_id , y_id , p_id , output_file_name ); |
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153 | giet_pthread_exit(" open() failure"); |
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154 | } |
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155 | else if ( (x_id==0) && (y_id==0) ) |
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156 | { |
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157 | printf("\n[TRANSPOSE] Proc [0,0,0] open file %s / fd = %d\n", |
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158 | output_file_name , fd_out ); |
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159 | } |
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160 | |
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161 | |
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162 | unsigned int offset = ((npixels*cluster_id)/nclusters); |
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163 | if ( giet_fat_lseek( fd_in, |
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164 | offset, |
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165 | SEEK_SET ) != offset ) |
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166 | { |
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167 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot seek fd = %d\n", |
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168 | x_id , y_id , p_id , fd_in ); |
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169 | giet_pthread_exit(" seek() failure"); |
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170 | } |
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171 | |
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172 | unsigned int pixels = npixels / nclusters; |
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173 | if ( giet_fat_read( fd_in, |
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174 | buf_in[cluster_id], |
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175 | pixels ) != pixels ) |
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176 | { |
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177 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot read fd = %d\n", |
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178 | x_id , y_id , p_id , fd_in ); |
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179 | giet_pthread_exit(" read() failure"); |
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180 | } |
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181 | |
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182 | if ( (x_id==0) && (y_id==0) ) |
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183 | { |
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184 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes load at cycle %d\n", |
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185 | x_id, y_id, p_id, giet_proctime() ); |
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186 | } |
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187 | } |
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188 | |
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189 | LOAD_END[x_id][y_id][p_id] = giet_proctime(); |
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190 | |
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191 | ///////////////////////////// |
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192 | sqt_barrier_wait( &barrier ); |
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193 | ///////////////////////////// |
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194 | |
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195 | // parallel transpose from buf_in to buf_out |
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196 | // each thread makes the transposition for nlt lines (nlt = image_size/nthreads) |
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197 | // from line [thread_id*nlt] to line [(thread_id + 1)*nlt - 1] |
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198 | // (p,l) are the absolute pixel coordinates in the source image |
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199 | |
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200 | TRSP_START[x_id][y_id][p_id] = giet_proctime(); |
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201 | |
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202 | unsigned int nlt = image_size / nthreads; // number of lines per thread |
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203 | unsigned int nlc = image_size / nclusters; // number of lines per cluster |
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204 | |
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205 | unsigned int src_cluster; |
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206 | unsigned int src_index; |
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207 | unsigned int dst_cluster; |
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208 | unsigned int dst_index; |
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209 | |
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210 | unsigned char byte; |
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211 | |
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212 | unsigned int first = thread_id * nlt; // first line index for a given thread |
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213 | unsigned int last = first + nlt; // last line index for a given thread |
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214 | |
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215 | for ( l = first ; l < last ; l++ ) |
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216 | { |
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217 | check_line_before[l] = 0; |
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218 | |
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219 | // in each iteration we transfer one byte |
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220 | for ( p = 0 ; p < image_size ; p++ ) |
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221 | { |
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222 | // read one byte from local buf_in |
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223 | src_cluster = l / nlc; |
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224 | src_index = (l % nlc)*image_size + p; |
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225 | byte = buf_in[src_cluster][src_index]; |
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226 | |
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227 | // compute checksum |
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228 | check_line_before[l] = check_line_before[l] + byte; |
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229 | |
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230 | // write one byte to remote buf_out |
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231 | dst_cluster = p / nlc; |
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232 | dst_index = (p % nlc)*image_size + l; |
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233 | buf_out[dst_cluster][dst_index] = byte; |
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234 | } |
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235 | } |
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236 | |
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237 | if ( (p_id == 0) && (x_id==0) && (y_id==0) ) |
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238 | { |
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239 | printf("\n[TRANSPOSE] proc [%d,%d,%d] completes transpose at cycle %d\n", |
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240 | x_id, y_id, p_id, giet_proctime() ); |
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241 | } |
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242 | |
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243 | TRSP_END[x_id][y_id][p_id] = giet_proctime(); |
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244 | |
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245 | ///////////////////////////// |
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246 | sqt_barrier_wait( &barrier ); |
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247 | ///////////////////////////// |
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248 | |
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249 | // parallel display from local buf_out to frame buffer |
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250 | // all threads contribute to display using memcpy... |
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251 | |
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252 | DISP_START[x_id][y_id][p_id] = giet_proctime(); |
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253 | |
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254 | unsigned int npt = npixels / nthreads; // number of pixels per thread |
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255 | |
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256 | giet_fbf_sync_write( npt * thread_id, |
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257 | &buf_out[cluster_id][p_id*npt], |
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258 | npt ); |
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259 | |
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260 | if ( (x_id==0) && (y_id==0) && (p_id==0) ) |
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261 | { |
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262 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes display at cycle %d\n", |
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263 | x_id, y_id, p_id, giet_proctime() ); |
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264 | } |
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265 | |
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266 | DISP_END[x_id][y_id][p_id] = giet_proctime(); |
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267 | |
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268 | ///////////////////////////// |
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269 | sqt_barrier_wait( &barrier ); |
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270 | ///////////////////////////// |
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271 | |
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272 | // parallel store : buf_out buffers to disk |
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273 | // only thread running on processor(x,y,0) does it |
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274 | |
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275 | STOR_START[x_id][y_id][p_id] = giet_proctime(); |
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276 | |
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277 | if ( p_id == 0 ) |
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278 | { |
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279 | unsigned int offset = ((npixels*cluster_id)/nclusters); |
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280 | if ( giet_fat_lseek( fd_out, |
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281 | offset, |
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282 | SEEK_SET ) != offset ) |
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283 | { |
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284 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot seek fr = %d\n", |
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285 | x_id , y_id , p_id , fd_out ); |
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286 | giet_pthread_exit(" seek() failure"); |
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287 | } |
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288 | |
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289 | unsigned int pixels = npixels / nclusters; |
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290 | if ( giet_fat_write( fd_out, |
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291 | buf_out[cluster_id], |
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292 | pixels ) != pixels ) |
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293 | { |
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294 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot write fd = %d\n", |
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295 | x_id , y_id , p_id , fd_out ); |
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296 | giet_pthread_exit(" write() failure"); |
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297 | } |
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298 | |
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299 | if ( (x_id==0) && (y_id==0) ) |
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300 | { |
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301 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes store at cycle %d\n", |
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302 | x_id, y_id, p_id, giet_proctime() ); |
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303 | } |
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304 | } |
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305 | |
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306 | STOR_END[x_id][y_id][p_id] = giet_proctime(); |
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307 | |
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308 | // In each cluster, only thread running on Processor[x,y,0] releases |
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309 | // the distributed buffers and close the file descriptors. |
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310 | |
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311 | if ( p_id==0 ) |
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312 | { |
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313 | free( buf_in[cluster_id] ); |
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314 | free( buf_out[cluster_id] ); |
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315 | |
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316 | giet_fat_close( fd_in ); |
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317 | giet_fat_close( fd_out ); |
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318 | } |
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319 | |
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320 | if ( (x_id != 0) || (y_id != 0) || (p_id != 0) ) |
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321 | giet_pthread_exit( "completed" ); |
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322 | |
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323 | } // end execute() |
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324 | |
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325 | |
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326 | |
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327 | ////////////////////////////////////// |
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328 | void instrument( unsigned int x_size, |
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329 | unsigned int y_size, |
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330 | unsigned int nprocs ) |
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331 | ////////////////////////////////////// |
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332 | { |
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333 | unsigned int x, y, l; |
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334 | |
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335 | unsigned int min_load_start = 0xFFFFFFFF; |
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336 | unsigned int max_load_start = 0; |
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337 | unsigned int min_load_ended = 0xFFFFFFFF; |
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338 | unsigned int max_load_ended = 0; |
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339 | unsigned int min_trsp_start = 0xFFFFFFFF; |
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340 | unsigned int max_trsp_start = 0; |
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341 | unsigned int min_trsp_ended = 0xFFFFFFFF; |
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342 | unsigned int max_trsp_ended = 0; |
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343 | unsigned int min_disp_start = 0xFFFFFFFF; |
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344 | unsigned int max_disp_start = 0; |
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345 | unsigned int min_disp_ended = 0xFFFFFFFF; |
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346 | unsigned int max_disp_ended = 0; |
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347 | unsigned int min_stor_start = 0xFFFFFFFF; |
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348 | unsigned int max_stor_start = 0; |
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349 | unsigned int min_stor_ended = 0xFFFFFFFF; |
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350 | unsigned int max_stor_ended = 0; |
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351 | |
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352 | for (x = 0; x < x_size; x++) |
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353 | { |
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354 | for (y = 0; y < y_size; y++) |
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355 | { |
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356 | for ( l = 0 ; l < nprocs ; l++ ) |
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357 | { |
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358 | if (LOAD_START[x][y][l] < min_load_start) min_load_start = LOAD_START[x][y][l]; |
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359 | if (LOAD_START[x][y][l] > max_load_start) max_load_start = LOAD_START[x][y][l]; |
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360 | if (LOAD_END[x][y][l] < min_load_ended) min_load_ended = LOAD_END[x][y][l]; |
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361 | if (LOAD_END[x][y][l] > max_load_ended) max_load_ended = LOAD_END[x][y][l]; |
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362 | if (TRSP_START[x][y][l] < min_trsp_start) min_trsp_start = TRSP_START[x][y][l]; |
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363 | if (TRSP_START[x][y][l] > max_trsp_start) max_trsp_start = TRSP_START[x][y][l]; |
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364 | if (TRSP_END[x][y][l] < min_trsp_ended) min_trsp_ended = TRSP_END[x][y][l]; |
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365 | if (TRSP_END[x][y][l] > max_trsp_ended) max_trsp_ended = TRSP_END[x][y][l]; |
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366 | if (DISP_START[x][y][l] < min_disp_start) min_disp_start = DISP_START[x][y][l]; |
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367 | if (DISP_START[x][y][l] > max_disp_start) max_disp_start = DISP_START[x][y][l]; |
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368 | if (DISP_END[x][y][l] < min_disp_ended) min_disp_ended = DISP_END[x][y][l]; |
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369 | if (DISP_END[x][y][l] > max_disp_ended) max_disp_ended = DISP_END[x][y][l]; |
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370 | if (STOR_START[x][y][l] < min_stor_start) min_stor_start = STOR_START[x][y][l]; |
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371 | if (STOR_START[x][y][l] > max_stor_start) max_stor_start = STOR_START[x][y][l]; |
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372 | if (STOR_END[x][y][l] < min_stor_ended) min_stor_ended = STOR_END[x][y][l]; |
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373 | if (STOR_END[x][y][l] > max_stor_ended) max_stor_ended = STOR_END[x][y][l]; |
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374 | } |
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375 | } |
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376 | } |
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377 | |
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378 | printf("\n ---------------- Instrumentation Results ---------------------\n"); |
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379 | |
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380 | printf(" - LOAD_START : min = %d / max = %d / med = %d / delta = %d\n", |
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381 | min_load_start, max_load_start, (min_load_start+max_load_start)/2, |
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382 | max_load_start-min_load_start); |
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383 | |
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384 | printf(" - LOAD_END : min = %d / max = %d / med = %d / delta = %d\n", |
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385 | min_load_ended, max_load_ended, (min_load_ended+max_load_ended)/2, |
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386 | max_load_ended-min_load_ended); |
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387 | |
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388 | printf(" - TRSP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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389 | min_trsp_start, max_trsp_start, (min_trsp_start+max_trsp_start)/2, |
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390 | max_trsp_start-min_trsp_start); |
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391 | |
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392 | printf(" - TRSP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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393 | min_trsp_ended, max_trsp_ended, (min_trsp_ended+max_trsp_ended)/2, |
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394 | max_trsp_ended-min_trsp_ended); |
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395 | |
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396 | printf(" - DISP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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397 | min_disp_start, max_disp_start, (min_disp_start+max_disp_start)/2, |
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398 | max_disp_start-min_disp_start); |
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399 | |
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400 | printf(" - DISP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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401 | min_disp_ended, max_disp_ended, (min_disp_ended+max_disp_ended)/2, |
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402 | max_disp_ended-min_disp_ended); |
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403 | |
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404 | printf(" - STOR_START : min = %d / max = %d / med = %d / delta = %d\n", |
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405 | min_stor_start, max_stor_start, (min_stor_start+max_stor_start)/2, |
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406 | max_stor_start-min_stor_start); |
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407 | |
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408 | printf(" - STOR_END : min = %d / max = %d / med = %d / delta = %d\n", |
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409 | min_stor_ended, max_stor_ended, (min_stor_ended+max_stor_ended)/2, |
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410 | max_stor_ended-min_stor_ended); |
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411 | |
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412 | } // end instrument() |
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413 | |
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414 | |
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415 | |
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416 | ////////////////////////////////////////// |
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417 | __attribute__ ((constructor)) void main() |
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418 | ////////////////////////////////////////// |
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419 | { |
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420 | // indexes for loops |
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421 | unsigned int x , y , n; |
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422 | |
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423 | // get identifiers for proc executing main |
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424 | unsigned int x_id; // x cluster coordinate |
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425 | unsigned int y_id; // y cluster coordinate |
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426 | unsigned int p_id; // local processor index |
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427 | |
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428 | giet_proc_xyp( &x_id , &y_id , &p_id ); |
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429 | |
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430 | // get & check plat-form parameters |
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431 | unsigned int x_size; // number of clusters in a row |
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432 | unsigned int y_size; // number of clusters in a column |
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433 | unsigned int nprocs; // number of processors per cluster |
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434 | |
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435 | giet_procs_number( &x_size , &y_size , &nprocs ); |
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436 | |
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437 | giet_pthread_assert( ((nprocs == 1) || (nprocs == 2) || (nprocs == 4)), |
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438 | "[TRANSPOSE ERROR] number of procs per cluster must be 1, 2 or 4"); |
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439 | |
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440 | giet_pthread_assert( ((x_size == 1) || (x_size == 2) || (x_size == 4) || |
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441 | (x_size == 8) || (x_size == 16)), |
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442 | "[TRANSPOSE ERROR] x_size must be 1,2,4,8,16"); |
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443 | |
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444 | giet_pthread_assert( ((y_size == 1) || (y_size == 2) || (y_size == 4) || |
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445 | (y_size == 8) || (y_size == 16)), |
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446 | "[TRANSPOSE ERROR] y_size must be 1,2,4,8,16"); |
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447 | |
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448 | // compute number of threads |
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449 | unsigned int nthreads = x_size * y_size * nprocs; |
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450 | |
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451 | // shared TTY allocation |
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452 | giet_tty_alloc( 1 ); |
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453 | lock_init( &tty_lock); |
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454 | |
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455 | // get FBF ownership and FBF size |
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456 | unsigned int width; |
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457 | unsigned int height; |
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458 | giet_fbf_alloc(); |
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459 | giet_fbf_size( &width , &height ); |
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460 | |
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461 | printf("\n[TRANSPOSE] start at cycle %d on %d cores / FBF = %d * %d pixels\n", |
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462 | giet_proctime(), nthreads , width , height ); |
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463 | |
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464 | if ( INTERACTIVE ) // input_file_name, output_file_name, and size acquisition |
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465 | { |
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466 | printf("\n[TRANSPOSE] enter path for input file / default is : %s\n> ", INPUT_FILE_PATH ); |
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467 | giet_tty_gets( input_file_name , 256 ); |
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468 | printf("\n"); |
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469 | if ( strcmp( input_file_name , "" ) == 0 ) strcpy( input_file_name , INPUT_FILE_PATH ); |
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470 | |
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471 | printf("\n[TRANSPOSE] enter path for output file / default is : %s\n> ", OUTPUT_FILE_PATH ); |
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472 | giet_tty_gets( output_file_name , 256 ); |
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473 | printf("\n"); |
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474 | if ( strcmp( output_file_name , "" ) == 0 ) strcpy( output_file_name , OUTPUT_FILE_PATH ); |
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475 | |
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476 | printf("\n[TRANSPOSE] enter image size / default is : %d\n> ", IMAGE_SIZE ); |
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477 | giet_tty_getw( &image_size ); |
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478 | printf("\n"); |
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479 | if ( image_size == 0 ) image_size = IMAGE_SIZE; |
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480 | } |
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481 | else |
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482 | { |
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483 | strcpy( input_file_name , INPUT_FILE_PATH ); |
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484 | strcpy( output_file_name , OUTPUT_FILE_PATH ); |
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485 | image_size = IMAGE_SIZE; |
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486 | } |
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487 | |
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488 | // check image size / number of threads |
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489 | giet_pthread_assert( (nprocs * x_size * y_size <= image_size ), |
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490 | "[TRANSPOSE ERROR] number of threads larger than number of lines"); |
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491 | |
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492 | printf("\n[TRANSPOSE] input = %s / output = %s / size = %d\n", |
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493 | input_file_name, output_file_name, image_size ); |
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494 | |
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495 | // distributed heap initialisation |
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496 | for ( x = 0 ; x < x_size ; x++ ) |
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497 | { |
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498 | for ( y = 0 ; y < y_size ; y++ ) |
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499 | { |
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500 | heap_init( x , y ); |
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501 | } |
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502 | } |
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503 | |
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504 | // allocate thread[] array |
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505 | pthread_t* thread = malloc( nthreads * sizeof(pthread_t) ); |
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506 | |
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507 | // barrier initialisation |
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508 | sqt_barrier_init( &barrier, x_size , y_size , nprocs ); |
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509 | |
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510 | // Initialisation completed |
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511 | printf("\n[TRANSPOSE] initialisation completed at cycle %d\n", giet_proctime() ); |
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512 | |
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513 | // launch other threads to run execute() function |
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514 | for ( n = 1 ; n < nthreads ; n++ ) |
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515 | { |
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516 | if ( giet_pthread_create( &thread[n], |
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517 | NULL, // no attribute |
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518 | &execute, |
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519 | NULL ) ) // no argument |
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520 | { |
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521 | printf("\n[TRANSPOSE ERROR] creating thread %x\n", thread[n] ); |
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522 | giet_pthread_exit( NULL ); |
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523 | } |
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524 | } |
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525 | |
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526 | // run the execute() function |
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527 | execute(); |
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528 | |
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529 | // wait other threads completion |
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530 | for ( n = 1 ; n < nthreads ; n++ ) |
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531 | { |
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532 | if ( giet_pthread_join( thread[n], NULL ) ) |
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533 | { |
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534 | printf("\n[TRANSPOSE ERROR] joining thread %x\n", thread[n] ); |
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535 | giet_pthread_exit( NULL ); |
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536 | } |
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537 | else |
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538 | { |
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539 | printf("\n[TRANSPOSE] thread %x joined at cycle %d\n", |
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540 | thread[n] , giet_proctime() ); |
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541 | } |
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542 | } |
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543 | |
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544 | // call the instrument() function |
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545 | instrument( x_size , y_size , nprocs ); |
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546 | |
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547 | giet_pthread_exit( "completed" ); |
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548 | |
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549 | } // end main() |
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550 | |
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