[295] | 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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[307] | 11 | // - The number of clusters containing processors must be a power of 2. |
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[295] | 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 is optional (controled by DISPLAY_OK define) |
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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 "malloc.h" |
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| 22 | #include "barrier.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 5 // 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 | |
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| 28 | #define INSTRUMENTATION_OK 0 // display statistcs 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[32][4]; |
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| 38 | unsigned int LOAD_END [32][4]; |
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| 39 | unsigned int TRSP_START[32][4]; |
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| 40 | unsigned int TRSP_END [32][4]; |
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| 41 | unsigned int DISP_START[32][4]; |
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| 42 | unsigned int DISP_END [32][4]; |
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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 [32]; |
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| 47 | unsigned char* buf_out[32]; |
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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 | // synchronisation barriers |
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| 54 | giet_barrier_t barrier_0; |
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| 55 | giet_barrier_t barrier_1; |
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| 56 | giet_barrier_t barrier_2; |
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| 57 | giet_barrier_t barrier_3; |
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| 58 | giet_barrier_t barrier_4; |
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| 59 | |
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| 60 | volatile unsigned int init_ok = 1; |
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| 61 | |
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| 62 | ////////////////////////////////////////// |
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| 63 | __attribute__ ((constructor)) void main() |
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| 64 | { |
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| 65 | |
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[307] | 66 | int file; // file descriptor for images |
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| 67 | unsigned int l; // line index for loops |
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| 68 | unsigned int p; // pixel index for loops |
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[295] | 69 | |
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[307] | 70 | unsigned int proc_id = giet_procid(); // processor id |
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| 71 | unsigned int lpid = proc_id % NB_PROCS_MAX; // local processor id |
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| 72 | unsigned int cluster_xy = proc_id / NB_PROCS_MAX; // cluster index (8 bits format) |
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| 73 | unsigned int x = cluster_xy >> Y_WIDTH; // x coordinate |
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| 74 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); // y coordinate |
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[295] | 75 | |
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[307] | 76 | unsigned int npixels = NN * NN; // number of pixel per image |
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| 77 | unsigned int nblocks = npixels / 512; // number of blocks per image |
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| 78 | unsigned int image = 0; // image counter |
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[295] | 79 | |
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[307] | 80 | unsigned int nclusters = X_SIZE * Y_SIZE; // number of clusters with procs |
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| 81 | unsigned int cluster_id = (x * Y_SIZE) + y; // "continuous" cluster index |
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| 82 | unsigned int ntasks = nclusters * NB_PROCS_MAX; // number of tasks |
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| 83 | unsigned int task_id = (cluster_id * NB_PROCS_MAX) +lpid; // "continuous" task index |
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| 84 | |
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[295] | 85 | // processor [0,0,0] makes parameters checking and barriers initialization |
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| 86 | if ( proc_id == 0 ) |
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| 87 | { |
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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 ((nclusters != 1) && (nclusters != 2) && (nclusters != 4) && (nclusters != 8) && |
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| 93 | (nclusters != 16) && (nclusters != 32) ) |
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| 94 | { |
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| 95 | giet_exit("[TRANSPOSE ERROR] number of clusters must be 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 | barrier_init( &barrier_0, ntasks ); |
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| 103 | barrier_init( &barrier_1, ntasks ); |
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| 104 | barrier_init( &barrier_2, ntasks ); |
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| 105 | barrier_init( &barrier_3, ntasks ); |
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| 106 | barrier_init( &barrier_4, ntasks ); |
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| 107 | |
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| 108 | giet_shr_printf("\n*** Proc [%d,%d,%d] completes barrier init at cycle %d\n", |
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| 109 | 0, 0, 0, giet_proctime() ); |
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[307] | 110 | |
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[295] | 111 | init_ok = 0; |
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| 112 | } |
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| 113 | else // others processors wait initialisation completion |
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| 114 | { |
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| 115 | while ( init_ok == 1 ); |
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| 116 | } |
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| 117 | |
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| 118 | // The buffers containing the images are distributed in clusters |
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| 119 | // (one buf_in and one buf_out per cluster). |
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| 120 | // Each buffer contains (NN*NN / nclusters) bytes. |
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[307] | 121 | // They are allocated in the cluster[x,y] heap by processor[x,y,0] |
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[295] | 122 | if ( lpid == 0 ) |
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| 123 | { |
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[307] | 124 | // get heap vaddr in cluster[0,0] |
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| 125 | unsigned int heap_base; |
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| 126 | giet_vobj_get_vbase( "transpose", "heap_0_0", &heap_base ); |
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| 127 | |
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| 128 | // allocate buffers in cluster[x,y] |
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| 129 | buf_in[cluster_id] = ((unsigned char*)heap_base) + (cluster_xy << 20); |
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| 130 | buf_out[cluster_id] = buf_in[cluster_id] + NN*NN/nclusters; |
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[295] | 131 | |
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| 132 | giet_shr_printf("\n*** Proc [%d,%d,%d] completes buffer allocation at cycle %d\n" |
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| 133 | " - buf_in = %x\n" |
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| 134 | " - buf_out = %x\n", |
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| 135 | x, y, 0, giet_proctime(), |
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| 136 | (unsigned int)buf_in[cluster_id], |
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| 137 | (unsigned int)buf_out[cluster_id] ); |
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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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[307] | 142 | if (file < 0) |
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| 143 | { |
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| 144 | giet_shr_printf("[TRANSPOSE ERROR] Processor[%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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[295] | 149 | } |
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| 150 | |
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[307] | 151 | /////////////////////////// |
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[295] | 152 | barrier_wait( &barrier_0 ); |
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| 153 | |
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| 154 | // Main loop (on images) |
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| 155 | while (image < NB_IMAGES) |
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| 156 | { |
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| 157 | // pseudo parallel load from disk to buf_in buffer : nblocks/nclusters blocks |
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| 158 | // only task running on processor with (lpid == 0) does it |
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| 159 | |
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| 160 | LOAD_START[cluster_id][lpid] = giet_proctime(); |
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| 161 | |
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| 162 | if (lpid == 0) |
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| 163 | { |
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| 164 | giet_fat_read( file, |
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| 165 | buf_in[cluster_id], |
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| 166 | (nblocks / nclusters), |
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| 167 | ((image*nblocks) + ((nblocks*cluster_id)/nclusters)) ); |
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| 168 | |
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| 169 | giet_shr_printf("\n*** Proc [%d,%d,0] completes load for image %d at cycle %d\n", |
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| 170 | x, y, image, giet_proctime() ); |
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| 171 | } |
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| 172 | |
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| 173 | LOAD_END[cluster_id][lpid] = giet_proctime(); |
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| 174 | |
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[307] | 175 | /////////////////////////// |
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[295] | 176 | barrier_wait( &barrier_1 ); |
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| 177 | |
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| 178 | // parallel transpose from buf_in to buf_out |
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| 179 | // each task makes the transposition for nlt lines (nlt = NN/ntasks) |
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| 180 | // from line [task_id*nlt] to line [(task_id + 1)*nlt - 1] |
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| 181 | // (p,l) are the absolute pixel coordinates in the source image |
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| 182 | |
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| 183 | |
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| 184 | TRSP_START[cluster_id][lpid] = giet_proctime(); |
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| 185 | |
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| 186 | unsigned int nlt = NN / ntasks; // number of lines per task |
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| 187 | unsigned int nlc = NN / nclusters; // number of lines per cluster |
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| 188 | |
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| 189 | unsigned int src_cluster; |
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| 190 | unsigned int src_index; |
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| 191 | unsigned int dst_cluster; |
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| 192 | unsigned int dst_index; |
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| 193 | |
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| 194 | unsigned char byte; |
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| 195 | |
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| 196 | unsigned int first = task_id * nlt; // first line index for a given task |
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| 197 | unsigned int last = first + nlt; // last line index for a given task |
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| 198 | |
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| 199 | for ( l = first ; l < last ; l++ ) |
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| 200 | { |
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| 201 | check_line_before[l] = 0; |
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| 202 | |
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| 203 | // in each iteration we transfer one byte |
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| 204 | for ( p = 0 ; p < NN ; p++ ) |
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| 205 | { |
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| 206 | // read one byte from local buf_in |
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| 207 | src_cluster = l / nlc; |
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| 208 | src_index = (l % nlc)*NN + p; |
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| 209 | byte = buf_in[src_cluster][src_index]; |
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| 210 | |
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| 211 | // compute checksum |
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| 212 | check_line_before[l] = check_line_before[l] + byte; |
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| 213 | |
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| 214 | // write one byte to remote buf_out |
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| 215 | dst_cluster = p / nlc; |
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| 216 | dst_index = (p % nlc)*NN + l; |
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| 217 | buf_out[dst_cluster][dst_index] = byte; |
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| 218 | } |
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| 219 | } |
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| 220 | |
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[307] | 221 | if ( lpid == 0 ) |
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| 222 | { |
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| 223 | giet_shr_printf("\n*** proc [%d,%d,0] completes transpose for image %d at cycle %d\n", |
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| 224 | x, y, image, giet_proctime() ); |
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[295] | 225 | |
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[307] | 226 | } |
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[295] | 227 | TRSP_END[cluster_id][lpid] = giet_proctime(); |
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| 228 | |
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[307] | 229 | /////////////////////////// |
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[295] | 230 | barrier_wait( &barrier_2 ); |
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| 231 | |
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| 232 | // optional parallel display from local buf_out to frame buffer |
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| 233 | // all processors contribute to display using memcpy... |
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| 234 | |
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[307] | 235 | if ( USE_FBF ) // external frame buffer available |
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[295] | 236 | { |
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| 237 | DISP_START[cluster_id][lpid] = giet_proctime(); |
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| 238 | |
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| 239 | unsigned int npt = npixels / ntasks; // number of pixels per task |
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| 240 | |
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| 241 | giet_fb_sync_write( npt * task_id, |
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| 242 | &buf_out[cluster_id][lpid*npt], |
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| 243 | npt ); |
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| 244 | |
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[307] | 245 | if ( lpid == 0 ) |
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| 246 | { |
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| 247 | giet_shr_printf("\n*** Proc [%d,%d,0] completes display for image %d at cycle %d\n", |
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| 248 | x, y, image, giet_proctime() ); |
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| 249 | } |
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[295] | 250 | |
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| 251 | DISP_END[cluster_id][lpid] = giet_proctime(); |
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| 252 | |
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[307] | 253 | /////////////////////////// |
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[295] | 254 | barrier_wait( &barrier_3 ); |
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| 255 | } |
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| 256 | |
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| 257 | // checksum done by processor (lpid == 0) in each cluster |
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| 258 | |
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| 259 | if ( lpid == 0 ) |
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| 260 | { |
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| 261 | unsigned int success = 1; |
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| 262 | unsigned int start = cluster_id * nlc; |
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| 263 | unsigned int stop = start + nlc; |
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| 264 | |
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| 265 | for ( l = start ; l < stop ; l++ ) |
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| 266 | { |
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| 267 | check_line_after[l] = 0; |
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| 268 | |
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| 269 | for ( p = 0 ; p < NN ; p++ ) |
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| 270 | { |
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| 271 | // read one byte in remote buffer |
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| 272 | src_cluster = p / nlc; |
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| 273 | src_index = (p % nlc)*NN + l; |
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| 274 | |
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| 275 | unsigned char byte = buf_out[src_cluster][src_index]; |
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| 276 | |
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| 277 | check_line_after[l] = check_line_after[l] + byte; |
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| 278 | } |
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| 279 | |
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| 280 | if ( check_line_before[l] != check_line_after[l] ) success = 0; |
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| 281 | } |
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| 282 | |
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| 283 | if ( success ) |
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| 284 | { |
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| 285 | giet_shr_printf("\n*** proc [%d,%d,0] : checksum OK for image %d\n", |
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| 286 | x, y, image ); |
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| 287 | } |
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| 288 | else |
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| 289 | { |
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| 290 | giet_shr_printf("\n*** proc [%d,%d,0] : checksum KO for image %d\n", |
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| 291 | x, y, image ); |
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| 292 | } |
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| 293 | } |
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| 294 | |
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| 295 | // instrumentation done by processor [0,0,0] |
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| 296 | |
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| 297 | if ( (proc_id == 0) && INSTRUMENTATION_OK ) |
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| 298 | { |
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| 299 | int cc, pp; |
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| 300 | unsigned int min_load_start = 0xFFFFFFFF; |
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| 301 | unsigned int max_load_start = 0; |
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| 302 | unsigned int min_load_ended = 0xFFFFFFFF; |
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| 303 | unsigned int max_load_ended = 0; |
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| 304 | unsigned int min_trsp_start = 0xFFFFFFFF; |
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| 305 | unsigned int max_trsp_start = 0; |
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| 306 | unsigned int min_trsp_ended = 0xFFFFFFFF; |
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| 307 | unsigned int max_trsp_ended = 0; |
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| 308 | unsigned int min_disp_start = 0xFFFFFFFF; |
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| 309 | unsigned int max_disp_start = 0; |
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| 310 | unsigned int min_disp_ended = 0xFFFFFFFF; |
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| 311 | unsigned int max_disp_ended = 0; |
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| 312 | |
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| 313 | for (cc = 0; cc < nclusters; cc++) |
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| 314 | { |
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| 315 | for (pp = 0; pp < NB_PROCS_MAX; pp++) |
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| 316 | { |
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| 317 | if (LOAD_START[cc][pp] < min_load_start) min_load_start = LOAD_START[cc][pp]; |
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| 318 | if (LOAD_START[cc][pp] > max_load_start) max_load_start = LOAD_START[cc][pp]; |
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| 319 | if (LOAD_END[cc][pp] < min_load_ended) min_load_ended = LOAD_END[cc][pp]; |
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| 320 | if (LOAD_END[cc][pp] > max_load_ended) max_load_ended = LOAD_END[cc][pp]; |
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| 321 | if (TRSP_START[cc][pp] < min_trsp_start) min_trsp_start = TRSP_START[cc][pp]; |
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| 322 | if (TRSP_START[cc][pp] > max_trsp_start) max_trsp_start = TRSP_START[cc][pp]; |
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| 323 | if (TRSP_END[cc][pp] < min_trsp_ended) min_trsp_ended = TRSP_END[cc][pp]; |
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| 324 | if (TRSP_END[cc][pp] > max_trsp_ended) max_trsp_ended = TRSP_END[cc][pp]; |
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| 325 | if (DISP_START[cc][pp] < min_disp_start) min_disp_start = DISP_START[cc][pp]; |
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| 326 | if (DISP_START[cc][pp] > max_disp_start) max_disp_start = DISP_START[cc][pp]; |
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| 327 | if (DISP_END[cc][pp] < min_disp_ended) min_disp_ended = DISP_END[cc][pp]; |
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| 328 | if (DISP_END[cc][pp] > max_disp_ended) max_disp_ended = DISP_END[cc][pp]; |
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| 329 | } |
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| 330 | } |
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| 331 | |
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| 332 | giet_shr_printf(" - LOAD_START : min = %d / max = %d / med = %d / delta = %d\n", |
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| 333 | min_load_start, max_load_start, (min_load_start+max_load_start)/2, |
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| 334 | max_load_start-min_load_start); |
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| 335 | |
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| 336 | giet_shr_printf(" - LOAD_END : min = %d / max = %d / med = %d / delta = %d\n", |
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| 337 | min_load_ended, max_load_ended, (min_load_ended+max_load_ended)/2, |
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| 338 | max_load_ended-min_load_ended); |
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| 339 | |
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| 340 | giet_shr_printf(" - TRSP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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| 341 | min_trsp_start, max_trsp_start, (min_trsp_start+max_trsp_start)/2, |
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| 342 | max_trsp_start-min_trsp_start); |
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| 343 | |
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| 344 | giet_shr_printf(" - TRSP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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| 345 | min_trsp_ended, max_trsp_ended, (min_trsp_ended+max_trsp_ended)/2, |
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| 346 | max_trsp_ended-min_trsp_ended); |
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| 347 | |
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| 348 | giet_shr_printf(" - DISP_START : min = %d / max = %d / med = %d / delta = %d\n", |
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| 349 | min_disp_start, max_disp_start, (min_disp_start+max_disp_start)/2, |
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| 350 | max_disp_start-min_disp_start); |
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| 351 | |
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| 352 | giet_shr_printf(" - DISP_END : min = %d / max = %d / med = %d / delta = %d\n", |
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| 353 | min_disp_ended, max_disp_ended, (min_disp_ended+max_disp_ended)/2, |
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| 354 | max_disp_ended-min_disp_ended); |
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| 355 | } |
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| 356 | |
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| 357 | image++; |
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| 358 | |
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| 359 | ////////////////////////////////////////////////// |
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| 360 | // all tasks wait instrumentation completion |
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| 361 | ////////////////////////////////////////////////// |
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| 362 | barrier_wait( &barrier_4 ); |
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| 363 | |
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| 364 | } // end while image |
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| 365 | |
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| 366 | giet_exit("Completed"); |
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| 367 | |
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| 368 | } // end main() |
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| 369 | |
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| 370 | // Local Variables: |
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| 371 | // tab-width: 3 |
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| 372 | // c-basic-offset: |
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| 373 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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| 374 | // indent-tabs-mode: nil |
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| 375 | // End: |
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| 376 | |
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| 377 | // vim: filetype=cpp:expandtab:shiftwidth=3:tabstop=3:softtabstop=3 |
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| 378 | |
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| 379 | |
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| 380 | |
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