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 multi-threaded application makes a transpose for a NN*NN pixels image. |
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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. |
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9 | // |
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10 | // The image is read from a file (one byte per pixel), transposed and |
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11 | // saved in a second file. Then the transposed image is read from the second file, |
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12 | // transposed again and saved in a third file. |
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13 | // |
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14 | // The input and output buffers containing the image are distributed in all clusters. |
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15 | // |
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16 | // - The image size NN must fit the frame buffer size. |
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17 | // - The block size in block device must be 512 bytes. |
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18 | // - The number of clusters must be a power of 2 no larger than 64. |
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19 | // - The number of processors per cluster must be a power of 2 no larger than 4. |
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20 | // |
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21 | // For each image the application makes a self test (checksum for each line). |
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22 | // The actual display on the frame buffer depends on frame buffer availability. |
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23 | /////////////////////////////////////////////////////////////////////////////////////// |
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24 | |
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25 | #include "stdio.h" |
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26 | #include "user_barrier.h" |
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27 | #include "malloc.h" |
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28 | |
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29 | #define BLOCK_SIZE 512 // block size on disk |
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30 | #define X_MAX 8 // max number of clusters in row |
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31 | #define Y_MAX 8 // max number of clusters in column |
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32 | #define PROCS_MAX 4 // max number of procs per cluster |
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33 | #define CLUSTER_MAX (X_MAX * Y_MAX) // max number of clusters |
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34 | #define NN 256 // image size : nlines = npixels |
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35 | #define INITIAL_FILE_PATH "/misc/lena_256.raw" // pathname on virtual disk |
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36 | #define TRANSPOSED_FILE_PATH "/home/lena_transposed.raw" // pathname on virtual disk |
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37 | #define RESTORED_FILE_PATH "/home/lena_restored.raw" // pathname on virtual disk |
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38 | #define INSTRUMENTATION_OK 1 // display statistics on TTY |
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39 | |
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40 | // macro to use a shared TTY |
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41 | #define printf(...) lock_acquire( &tty_lock ); \ |
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42 | giet_tty_printf(__VA_ARGS__); \ |
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43 | lock_release( &tty_lock ) |
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44 | |
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45 | /////////////////////////////////////////////////////// |
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46 | // global variables stored in seg_data in cluster(0,0) |
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47 | /////////////////////////////////////////////////////// |
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48 | |
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49 | // instrumentation counters for each processor in each cluster |
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50 | unsigned int LOAD_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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51 | unsigned int LOAD_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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52 | unsigned int TRSP_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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53 | unsigned int TRSP_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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54 | unsigned int DISP_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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55 | unsigned int DISP_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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56 | unsigned int STOR_START[X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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57 | unsigned int STOR_END [X_MAX][Y_MAX][PROCS_MAX] = {{{ 0 }}}; |
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58 | |
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59 | // arrays of pointers on distributed buffers |
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60 | // one input buffer & one output buffer per cluster |
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61 | unsigned char* buf_in [CLUSTER_MAX]; |
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62 | unsigned char* buf_out[CLUSTER_MAX]; |
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63 | |
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64 | // checksum variables |
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65 | unsigned check_line_before[NN]; |
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66 | unsigned check_line_after[NN]; |
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67 | |
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68 | // lock protecting shared TTY |
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69 | user_lock_t tty_lock; |
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70 | |
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71 | // global & local synchronisation variables |
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72 | giet_sqt_barrier_t barrier; |
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73 | |
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74 | volatile unsigned int global_init_ok = 0; |
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75 | volatile unsigned int local_init_ok[X_MAX][Y_MAX] = {{ 0 }}; |
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76 | |
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77 | ////////////////////////////////////////// |
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78 | __attribute__ ((constructor)) void main() |
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79 | ////////////////////////////////////////// |
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80 | { |
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81 | unsigned int l; // line index for loops |
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82 | unsigned int p; // pixel index for loops |
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83 | |
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84 | // processor identifiers |
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85 | unsigned int x; // x cluster coordinate |
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86 | unsigned int y; // y cluster coordinate |
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87 | unsigned int lpid; // local processor index |
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88 | |
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89 | // plat-form parameters |
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90 | unsigned int x_size; // number of clusters in a row |
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91 | unsigned int y_size; // number of clusters in a column |
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92 | unsigned int nprocs; // number of processors per cluster |
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93 | |
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94 | giet_proc_xyp( &x, &y, &lpid); |
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95 | |
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96 | giet_procs_number( &x_size , &y_size , &nprocs ); |
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97 | |
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98 | unsigned int nclusters = x_size * y_size; // number of clusters |
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99 | unsigned int ntasks = x_size * y_size * nprocs; // number of tasks |
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100 | unsigned int npixels = NN * NN; // pixels per image |
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101 | unsigned int iteration = 0; // iiteration iter |
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102 | int fd_initial = 0; // initial file descriptor |
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103 | int fd_transposed = 0; // transposed file descriptor |
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104 | int fd_restored = 0; // restored file descriptor |
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105 | unsigned int cluster_id = (x * y_size) + y; // "continuous" index |
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106 | unsigned int task_id = (cluster_id * nprocs) + lpid; // "continuous" task index |
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107 | |
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108 | // checking parameters |
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109 | giet_assert( ((nprocs == 1) || (nprocs == 2) || (nprocs == 4)), |
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110 | "[TRANSPOSE ERROR] number of procs per cluster must be 1, 2 or 4"); |
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111 | |
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112 | giet_assert( ((x_size == 1) || (x_size == 2) || (x_size == 4) || |
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113 | (x_size == 8) || (x_size == 16)), |
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114 | "[TRANSPOSE ERROR] x_size must be 1,2,4,8,16"); |
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115 | |
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116 | giet_assert( ((y_size == 1) || (y_size == 2) || (y_size == 4) || |
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117 | (y_size == 8) || (y_size == 16)), |
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118 | "[TRANSPOSE ERROR] y_size must be 1,2,4,8,16"); |
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119 | |
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120 | giet_assert( (ntasks <= NN ), |
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121 | "[TRANSPOSE ERROR] number of tasks larger than number of lines"); |
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122 | |
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123 | /////////////////////////////////////////////////////////////////////// |
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124 | // Processor [0,0,0] makes global initialisation |
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125 | // It includes parameters checking, heap and barrier initialization. |
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126 | // Others processors wait initialisation completion |
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127 | /////////////////////////////////////////////////////////////////////// |
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128 | |
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129 | if ( (x==0) && (y==0) && (lpid==0) ) |
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130 | { |
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131 | // shared TTY allocation |
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132 | giet_tty_alloc( 1 ); |
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133 | |
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134 | // TTY lock initialisation |
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135 | lock_init( &tty_lock); |
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136 | |
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137 | // distributed heap initialisation |
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138 | unsigned int cx , cy; |
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139 | for ( cx = 0 ; cx < x_size ; cx++ ) |
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140 | { |
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141 | for ( cy = 0 ; cy < y_size ; cy++ ) |
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142 | { |
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143 | heap_init( cx , cy ); |
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144 | } |
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145 | } |
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146 | |
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147 | // barrier initialisation |
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148 | sqt_barrier_init( &barrier, x_size , y_size , nprocs ); |
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149 | |
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150 | printf("\n[TRANSPOSE] Proc [0,0,0] completes initialisation at cycle %d\n", |
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151 | giet_proctime() ); |
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152 | |
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153 | global_init_ok = 1; |
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154 | } |
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155 | else |
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156 | { |
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157 | while ( global_init_ok == 0 ); |
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158 | } |
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159 | |
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160 | /////////////////////////////////////////////////////////////////////// |
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161 | // In each cluster, only task running on processor[x,y,0] allocates |
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162 | // the local buffers containing the images in the distributed heap |
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163 | // (one buf_in and one buf_out per cluster). |
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164 | // Other processors in cluster wait completion. |
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165 | /////////////////////////////////////////////////////////////////////// |
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166 | |
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167 | if ( lpid == 0 ) |
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168 | { |
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169 | buf_in[cluster_id] = remote_malloc( npixels/nclusters, x, y ); |
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170 | buf_out[cluster_id] = remote_malloc( npixels/nclusters, x, y ); |
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171 | |
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172 | if ( (x==0) && (y==0) ) |
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173 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes buffer allocation" |
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174 | " for cluster[%d,%d] at cycle %d\n" |
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175 | " - buf_in = %x\n" |
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176 | " - buf_out = %x\n", |
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177 | x, y, lpid, x, y, giet_proctime(), |
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178 | (unsigned int)buf_in[cluster_id], (unsigned int)buf_out[cluster_id] ); |
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179 | |
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180 | /////////////////////////////////////////////////////////////////////// |
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181 | // In each cluster, only task running on procesor[x,y,0] open the |
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182 | // three private file descriptors for the three files |
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183 | /////////////////////////////////////////////////////////////////////// |
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184 | |
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185 | // open initial file |
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186 | fd_initial = giet_fat_open( INITIAL_FILE_PATH , O_RDONLY ); // read_only |
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187 | if ( fd_initial < 0 ) |
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188 | { |
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189 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot open file %s\n", |
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190 | x , y , lpid , INITIAL_FILE_PATH ); |
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191 | giet_exit(" open() failure"); |
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192 | } |
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193 | else if ( (x==0) && (y==0) && (lpid==0) ) |
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194 | { |
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195 | printf("\n[TRANSPOSE] Proc [0,0,0] open file %s / fd = %d\n", |
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196 | INITIAL_FILE_PATH , fd_initial ); |
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197 | } |
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198 | |
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199 | // open transposed file |
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200 | fd_transposed = giet_fat_open( TRANSPOSED_FILE_PATH , O_CREATE ); // create if required |
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201 | if ( fd_transposed < 0 ) |
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202 | { |
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203 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot open file %s\n", |
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204 | x , y , lpid , TRANSPOSED_FILE_PATH ); |
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205 | giet_exit(" open() failure"); |
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206 | } |
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207 | else if ( (x==0) && (y==0) && (lpid==0) ) |
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208 | { |
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209 | printf("\n[TRANSPOSE] Proc [0,0,0] open file %s / fd = %d\n", |
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210 | TRANSPOSED_FILE_PATH , fd_transposed ); |
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211 | } |
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212 | |
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213 | // open restored file |
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214 | fd_restored = giet_fat_open( RESTORED_FILE_PATH , O_CREATE ); // create if required |
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215 | if ( fd_restored < 0 ) |
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216 | { |
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217 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot open file %s\n", |
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218 | x , y , lpid , RESTORED_FILE_PATH ); |
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219 | giet_exit(" open() failure"); |
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220 | } |
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221 | else if ( (x==0) && (y==0) && (lpid==0) ) |
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222 | { |
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223 | printf("\n[TRANSPOSE] Proc [0,0,0] open file %s / fd = %d\n", |
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224 | RESTORED_FILE_PATH , fd_restored ); |
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225 | } |
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226 | |
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227 | local_init_ok[x][y] = 1; |
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228 | } |
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229 | else |
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230 | { |
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231 | while( local_init_ok[x][y] == 0 ); |
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232 | } |
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233 | |
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234 | /////////////////////////////////////////////////////////////////////// |
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235 | // Main loop / two iterations: |
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236 | // - first makes initial => transposed |
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237 | // - second makes transposed => restored |
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238 | // All processors execute this main loop. |
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239 | /////////////////////////////////////////////////////////////////////// |
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240 | |
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241 | unsigned int fd_in = fd_initial; |
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242 | unsigned int fd_out = fd_transposed; |
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243 | |
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244 | while (iteration < 2) |
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245 | { |
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246 | /////////////////////////////////////////////////////////////////////// |
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247 | // pseudo parallel load from disk to buf_in buffers: npixels/nclusters |
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248 | // only task running on processor(x,y,0) does it |
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249 | /////////////////////////////////////////////////////////////////////// |
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250 | |
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251 | LOAD_START[x][y][lpid] = giet_proctime(); |
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252 | |
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253 | if (lpid == 0) |
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254 | { |
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255 | unsigned int offset = ((npixels*cluster_id)/nclusters); |
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256 | if ( giet_fat_lseek( fd_in, |
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257 | offset, |
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258 | SEEK_SET ) != offset ) |
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259 | { |
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260 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot seek fd = %d\n", |
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261 | x , y , lpid , fd_in ); |
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262 | giet_exit(" seek() failure"); |
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263 | } |
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264 | |
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265 | unsigned int pixels = npixels / nclusters; |
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266 | if ( giet_fat_read( fd_in, |
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267 | buf_in[cluster_id], |
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268 | pixels ) != pixels ) |
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269 | { |
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270 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot read fd = %d\n", |
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271 | x , y , lpid , fd_in ); |
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272 | giet_exit(" read() failure"); |
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273 | } |
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274 | |
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275 | if ( (x==0) && (y==0) ) |
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276 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes load" |
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277 | " for iteration %d at cycle %d\n", |
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278 | x, y, lpid, iteration, giet_proctime() ); |
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279 | } |
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280 | |
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281 | LOAD_END[x][y][lpid] = giet_proctime(); |
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282 | |
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283 | ///////////////////////////// |
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284 | sqt_barrier_wait( &barrier ); |
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285 | |
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286 | /////////////////////////////////////////////////////////////////////// |
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287 | // parallel transpose from buf_in to buf_out |
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288 | // each task makes the transposition for nlt lines (nlt = NN/ntasks) |
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289 | // from line [task_id*nlt] to line [(task_id + 1)*nlt - 1] |
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290 | // (p,l) are the absolute pixel coordinates in the source image |
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291 | /////////////////////////////////////////////////////////////////////// |
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292 | |
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293 | TRSP_START[x][y][lpid] = giet_proctime(); |
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294 | |
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295 | unsigned int nlt = NN / ntasks; // number of lines per task |
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296 | unsigned int nlc = NN / nclusters; // number of lines per cluster |
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297 | |
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298 | unsigned int src_cluster; |
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299 | unsigned int src_index; |
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300 | unsigned int dst_cluster; |
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301 | unsigned int dst_index; |
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302 | |
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303 | unsigned char byte; |
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304 | |
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305 | unsigned int first = task_id * nlt; // first line index for a given task |
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306 | unsigned int last = first + nlt; // last line index for a given task |
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307 | |
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308 | for ( l = first ; l < last ; l++ ) |
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309 | { |
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310 | check_line_before[l] = 0; |
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311 | |
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312 | // in each iteration we transfer one byte |
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313 | for ( p = 0 ; p < NN ; p++ ) |
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314 | { |
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315 | // read one byte from local buf_in |
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316 | src_cluster = l / nlc; |
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317 | src_index = (l % nlc)*NN + p; |
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318 | byte = buf_in[src_cluster][src_index]; |
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319 | |
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320 | // compute checksum |
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321 | check_line_before[l] = check_line_before[l] + byte; |
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322 | |
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323 | // write one byte to remote buf_out |
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324 | dst_cluster = p / nlc; |
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325 | dst_index = (p % nlc)*NN + l; |
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326 | buf_out[dst_cluster][dst_index] = byte; |
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327 | } |
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328 | } |
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329 | |
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330 | // if ( lpid == 0 ) |
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331 | { |
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332 | // if ( (x==0) && (y==0) ) |
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333 | printf("\n[TRANSPOSE] proc [%d,%d,0] completes transpose" |
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334 | " for iteration %d at cycle %d\n", |
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335 | x, y, iteration, giet_proctime() ); |
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336 | |
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337 | } |
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338 | TRSP_END[x][y][lpid] = giet_proctime(); |
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339 | |
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340 | ///////////////////////////// |
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341 | sqt_barrier_wait( &barrier ); |
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342 | |
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343 | /////////////////////////////////////////////////////////////////////// |
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344 | // parallel display from local buf_out to frame buffer |
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345 | // all tasks contribute to display using memcpy... |
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346 | /////////////////////////////////////////////////////////////////////// |
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347 | |
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348 | DISP_START[x][y][lpid] = giet_proctime(); |
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349 | |
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350 | unsigned int npt = npixels / ntasks; // number of pixels per task |
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351 | |
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352 | giet_fbf_sync_write( npt * task_id, |
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353 | &buf_out[cluster_id][lpid*npt], |
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354 | npt ); |
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355 | |
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356 | // if ( (x==0) && (y==0) && (lpid==0) ) |
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357 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes display" |
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358 | " for iteration %d at cycle %d\n", |
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359 | x, y, lpid, iteration, giet_proctime() ); |
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360 | |
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361 | DISP_END[x][y][lpid] = giet_proctime(); |
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362 | |
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363 | ///////////////////////////// |
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364 | sqt_barrier_wait( &barrier ); |
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365 | |
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366 | /////////////////////////////////////////////////////////////////////// |
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367 | // pseudo parallel store : buf_out buffers to disk : npixels/nclusters |
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368 | // only task running on processor(x,y,0) does it |
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369 | /////////////////////////////////////////////////////////////////////// |
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370 | |
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371 | STOR_START[x][y][lpid] = giet_proctime(); |
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372 | |
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373 | if ( lpid == 0 ) |
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374 | { |
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375 | unsigned int offset = ((npixels*cluster_id)/nclusters); |
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376 | if ( giet_fat_lseek( fd_out, |
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377 | offset, |
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378 | SEEK_SET ) != offset ) |
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379 | { |
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380 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot seek fr = %d\n", |
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381 | x , y , lpid , fd_out ); |
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382 | giet_exit(" seek() failure"); |
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383 | } |
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384 | |
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385 | unsigned int pixels = npixels / nclusters; |
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386 | if ( giet_fat_write( fd_out, |
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387 | buf_out[cluster_id], |
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388 | pixels ) != pixels ) |
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389 | { |
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390 | printf("\n[TRANSPOSE ERROR] Proc [%d,%d,%d] cannot write fd = %d\n", |
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391 | x , y , lpid , fd_out ); |
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392 | giet_exit(" write() failure"); |
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393 | } |
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394 | |
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395 | if ( (x==0) && (y==0) ) |
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396 | printf("\n[TRANSPOSE] Proc [%d,%d,%d] completes store" |
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397 | " for iteration %d at cycle %d\n", |
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398 | x, y, lpid, iteration, giet_proctime() ); |
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399 | } |
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400 | |
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401 | STOR_END[x][y][lpid] = giet_proctime(); |
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402 | |
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403 | ///////////////////////////// |
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404 | sqt_barrier_wait( &barrier ); |
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405 | |
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406 | // instrumentation done by processor [0,0,0] |
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407 | if ( (x==0) && (y==0) && (lpid==0) && INSTRUMENTATION_OK ) |
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408 | { |
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409 | int cx , cy , pp ; |
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410 | unsigned int min_load_start = 0xFFFFFFFF; |
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411 | unsigned int max_load_start = 0; |
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412 | unsigned int min_load_ended = 0xFFFFFFFF; |
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413 | unsigned int max_load_ended = 0; |
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414 | unsigned int min_trsp_start = 0xFFFFFFFF; |
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415 | unsigned int max_trsp_start = 0; |
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416 | unsigned int min_trsp_ended = 0xFFFFFFFF; |
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417 | unsigned int max_trsp_ended = 0; |
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418 | unsigned int min_disp_start = 0xFFFFFFFF; |
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419 | unsigned int max_disp_start = 0; |
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420 | unsigned int min_disp_ended = 0xFFFFFFFF; |
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421 | unsigned int max_disp_ended = 0; |
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422 | unsigned int min_stor_start = 0xFFFFFFFF; |
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423 | unsigned int max_stor_start = 0; |
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424 | unsigned int min_stor_ended = 0xFFFFFFFF; |
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425 | unsigned int max_stor_ended = 0; |
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426 | |
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427 | for (cx = 0; cx < x_size; cx++) |
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428 | { |
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429 | for (cy = 0; cy < y_size; cy++) |
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430 | { |
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431 | for (pp = 0; pp < NB_PROCS_MAX; pp++) |
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432 | { |
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433 | if (LOAD_START[cx][cy][pp] < min_load_start) min_load_start = LOAD_START[cx][cy][pp]; |
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434 | if (LOAD_START[cx][cy][pp] > max_load_start) max_load_start = LOAD_START[cx][cy][pp]; |
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435 | if (LOAD_END[cx][cy][pp] < min_load_ended) min_load_ended = LOAD_END[cx][cy][pp]; |
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436 | if (LOAD_END[cx][cy][pp] > max_load_ended) max_load_ended = LOAD_END[cx][cy][pp]; |
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437 | if (TRSP_START[cx][cy][pp] < min_trsp_start) min_trsp_start = TRSP_START[cx][cy][pp]; |
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438 | if (TRSP_START[cx][cy][pp] > max_trsp_start) max_trsp_start = TRSP_START[cx][cy][pp]; |
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439 | if (TRSP_END[cx][cy][pp] < min_trsp_ended) min_trsp_ended = TRSP_END[cx][cy][pp]; |
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440 | if (TRSP_END[cx][cy][pp] > max_trsp_ended) max_trsp_ended = TRSP_END[cx][cy][pp]; |
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441 | if (DISP_START[cx][cy][pp] < min_disp_start) min_disp_start = DISP_START[cx][cy][pp]; |
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442 | if (DISP_START[cx][cy][pp] > max_disp_start) max_disp_start = DISP_START[cx][cy][pp]; |
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443 | if (DISP_END[cx][cy][pp] < min_disp_ended) min_disp_ended = DISP_END[cx][cy][pp]; |
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444 | if (DISP_END[cx][cy][pp] > max_disp_ended) max_disp_ended = DISP_END[cx][cy][pp]; |
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445 | if (STOR_START[cx][cy][pp] < min_stor_start) min_stor_start = STOR_START[cx][cy][pp]; |
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446 | if (STOR_START[cx][cy][pp] > max_stor_start) max_stor_start = STOR_START[cx][cy][pp]; |
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447 | if (STOR_END[cx][cy][pp] < min_stor_ended) min_stor_ended = STOR_END[cx][cy][pp]; |
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448 | if (STOR_END[cx][cy][pp] > max_stor_ended) max_stor_ended = STOR_END[cx][cy][pp]; |
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449 | } |
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450 | } |
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451 | } |
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452 | |
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453 | printf("\n ---------------- Instrumentation Results ---------------------\n"); |
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454 | |
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455 | printf(" - LOAD_START : min = %d / max = %d / med = %d / delta = %d\n", |
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456 | min_load_start, max_load_start, (min_load_start+max_load_start)/2, |
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457 | max_load_start-min_load_start); |
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458 | |
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459 | printf(" - LOAD_END : min = %d / max = %d / med = %d / delta = %d\n", |
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460 | min_load_ended, max_load_ended, (min_load_ended+max_load_ended)/2, |
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461 | max_load_ended-min_load_ended); |
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462 | |
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463 | printf(" - TRSP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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464 | min_trsp_start, max_trsp_start, (min_trsp_start+max_trsp_start)/2, |
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465 | max_trsp_start-min_trsp_start); |
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466 | |
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467 | printf(" - TRSP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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468 | min_trsp_ended, max_trsp_ended, (min_trsp_ended+max_trsp_ended)/2, |
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469 | max_trsp_ended-min_trsp_ended); |
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470 | |
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471 | printf(" - DISP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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472 | min_disp_start, max_disp_start, (min_disp_start+max_disp_start)/2, |
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473 | max_disp_start-min_disp_start); |
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474 | |
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475 | printf(" - DISP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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476 | min_disp_ended, max_disp_ended, (min_disp_ended+max_disp_ended)/2, |
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477 | max_disp_ended-min_disp_ended); |
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478 | |
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479 | printf(" - STOR_START : min = %d / max = %d / med = %d / delta = %d\n", |
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480 | min_stor_start, max_stor_start, (min_stor_start+max_stor_start)/2, |
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481 | max_stor_start-min_stor_start); |
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482 | |
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483 | printf(" - STOR_END : min = %d / max = %d / med = %d / delta = %d\n", |
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484 | min_stor_ended, max_stor_ended, (min_stor_ended+max_stor_ended)/2, |
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485 | max_stor_ended-min_stor_ended); |
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486 | } |
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487 | |
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488 | ///////////////////////////// |
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489 | sqt_barrier_wait( &barrier ); |
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490 | |
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491 | // update iteration variables |
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492 | fd_in = fd_transposed; |
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493 | fd_out = fd_restored; |
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494 | iteration++; |
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495 | |
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496 | } // end while |
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497 | |
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498 | /////////////////////////////////////////////////////////////////////// |
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499 | // In each cluster, only task running on Processor[x,y,0] releases |
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500 | // the distributed buffers and close the file descriptors. |
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501 | /////////////////////////////////////////////////////////////////////// |
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502 | |
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503 | if ( lpid==0 ) |
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504 | { |
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505 | free( buf_in[cluster_id] ); |
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506 | free( buf_out[cluster_id] ); |
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507 | |
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508 | giet_fat_close( fd_initial ); |
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509 | giet_fat_close( fd_transposed ); |
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510 | giet_fat_close( fd_restored ); |
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511 | } |
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512 | |
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513 | giet_exit("Completed"); |
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514 | |
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515 | } // end main() |
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516 | |
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517 | // Local Variables: |
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518 | // tab-width: 3 |
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519 | // c-basic-offset: |
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520 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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521 | // indent-tabs-mode: nil |
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522 | // End: |
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523 | |
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524 | // vim: filetype=cpp:expandtab:shiftwidth=3:tabstop=3:softtabstop=3 |
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525 | |
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526 | |
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527 | |
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