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