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