Changeset 502 for soft/giet_vm/applications/gameoflife/main.c

Timestamp:

Feb 8, 2015, 9:20:45 PM (10 years ago)

Author:

alain

Message:

1) Introduce distributed barriers in the multi-threads applications
(classif) transpose, convol, sort, gameoflife)

2) Introducing support for architectures containing empty clusters
in the mapping of these multi-threaded applications.

3) Removing the "command line arguments" in the sort application
(replaced by the giet_procs_number() system call.

File:

• soft/giet_vm/applications/gameoflife/main.c (modified) (5 diffs)

soft/giet_vm/applications/gameoflife/main.c

@@ -1 @@
-/* 
- * This application is an emulation of the game of life automaton
- * It must be deployed from processor 0 and use contiguous processor
- * (example 0,1,2,3) 
- */
-
+//////////////////////////////////////////////////////////////////////////////////
+// File : main.c  (for gameoflife)
+// Date : November 2013
+// Author :  Alexandre Joannou <alexandre.joannou@lip6.fr>
+//
+// This application is an emulation of the game of life automaton.
+// The world size is defined by the HEIGHT and WIDTH parameters.
+// There is one task per processor, and each task compute HEIGHT/nbprocs lines.
+// The number of processors must be a power of 2 not larger than HEIGHT.
+//////////////////////////////////////////////////////////////////////////////////
 
 #include "stdio.h"
 #include "limits.h"
-#include "barrier.h"
-#include "hard_config.h"
+#include "user_barrier.h"
 #include "mapping_info.h"
 
 #define WIDTH           128
 #define HEIGHT          128
-#define NB_CLUSTER_MAX  256
 #define NB_ITERATION    1000000000
 
-#define PRINTF(...) ({ if ( proc_id==0) { giet_tty_printf(__VA_ARGS__); } })
-
-giet_barrier_t barriers[2];
-
-unsigned int init_ok = 1;
-
-#define NEW 0
-#define OLD 1
+#define PRINTF(...) ({ if ( proc_id==0) { giet_shr_printf(__VA_ARGS__); } })
+
+giet_sqt_barrier_t barrier;
+
+unsigned int init_ok = 0;
+
+#define OLD 0
+#define NEW 1
+#define DSP 2
 
 typedef unsigned char uint8_t;
 typedef unsigned int size_t;
 
-uint8_t world[2][HEIGHT][WIDTH];
-uint8_t world_yuv[HEIGHT][WIDTH];
-
-/* Generate binary values for world between base_line and base_line + nb_line */
+uint8_t world[3][HEIGHT][WIDTH];
+
+/////////////////////////////////////////////////
 void init_world(size_t base_line, size_t nb_line)
 {
    size_t x,y;
-   for (y = base_line ; y < base_line + nb_line; y++){
-      for(x = 0; x < WIDTH ; x++) {
-         // TODO OPTIMIZE RANDOM INIT
+   for (y = base_line ; y < base_line + nb_line; y++)
+   {
+      for(x = 0; x < WIDTH ; x++) 
+      {
          world[OLD][y][x] = giet_rand() % 2;  
       }
@@ -44 +47 @@
 }
 
+/////////////////////////////////////////////////
 uint8_t number_of_alive_neigh(size_t x, size_t y)
 {
@@ -60 +64 @@
 }
 
-/* Compute cell x,y */
+/////////////////////////////////////////////////
 uint8_t compute_cell(size_t x, size_t y)
 {
    uint8_t nb_neighbours_alive = number_of_alive_neigh(x,y);
-   if (world[OLD][y][x] == 1) {
-      if (nb_neighbours_alive == 2 ||
-          nb_neighbours_alive == 3) 
-      {
-         return 1;   
-      }
-   }
-   else {
-      if (nb_neighbours_alive == 3) {
-         return 1;
-      }
-      else {
-         return world[OLD][y][x];
-      }
+   if (world[OLD][y][x] == 1) 
+   {
+      if (nb_neighbours_alive == 2 || nb_neighbours_alive == 3)  return 1;
+   }
+   else 
+   {
+      if (nb_neighbours_alive == 3) return 1;
+      else                          return world[OLD][y][x];
    }
    return 0;
@@ -99 +97 @@
 {
    size_t x,y;
-   for (y = base_line; y < base_line + nb_line; y++){
-      for(x = 0; x < WIDTH ; x++) {
-         //world_yuv[y][x] = world[NEW][y][x]*100;  
-         world[NEW][y][x] = world[NEW][y][x]*255;  
+   for (y = base_line; y < base_line + nb_line; y++)
+   {
+      for(x = 0; x < WIDTH ; x++) 
+      {
+         world[DSP][y][x] = world[OLD][y][x]*255;  
       }
    }
 
    giet_fbf_sync_write( base_line * WIDTH , 
-                       &world[NEW][base_line][0], 
-                       nb_line * WIDTH);
+                        &world[DSP][base_line][0], 
+                        nb_line * WIDTH );
 }
 
@@ -133 +132 @@
    giet_proc_xyp( &x, &y, &p );
 
+   // get processors number
+   unsigned int x_size;
+   unsigned int y_size;
+   unsigned int n_local_procs;
+   giet_procs_number( &x_size, &y_size, &n_local_procs );
+
    // compute continuous processor index
-   unsigned int proc_id = (((x * Y_SIZE) + y) * NB_PROCS_MAX) + p;  
-
-   unsigned int nlocal_procs  = NB_PROCS_MAX;               // processors per cluster
-   unsigned int nclusters     = X_SIZE*Y_SIZE;              // number of clusters
-   unsigned int nglobal_procs = nclusters * nlocal_procs;   // number of processors
+   unsigned int proc_id = (((x * y_size) + y) * n_local_procs) + p;  
+
+   unsigned int n_clusters     = x_size * y_size;            // number of clusters
+   unsigned int n_global_procs = n_clusters * n_local_procs; // number of processors
    size_t i;
 
-   size_t       nb_line       = HEIGHT / nglobal_procs;
+   if ( n_global_procs > HEIGHT )
+   {
+       PRINTF("[GAMEOFLIFE ERROR] Number or processors too large :"
+              " nb_procs = %d / image heigth = %d\n", n_global_procs, HEIGHT );
+       giet_exit("error");
+   }
+
+   size_t       nb_line       = HEIGHT / n_global_procs;
    size_t       base_line     = nb_line * proc_id; 
    
-   PRINTF("*** Starting init at cycle %d ***\n", giet_proctime());
-
-   //  barriers initialization
+   PRINTF("\n*** Starting barrier initialisation at cycle %d ***\n"
+          " nprocs = %d / nlines = %d\n", 
+          giet_proctime() , n_global_procs, HEIGHT );
+
+   // barrier initialization
    if ( proc_id == 0 )
    {
-      barrier_init(&barriers[0], nglobal_procs);
-      barrier_init(&barriers[1], nglobal_procs);
-
-      init_ok = 0;
+      sqt_barrier_init( &barrier , x_size , y_size , n_local_procs );
+      init_ok = 1;
    }
    else
    {
-      while ( init_ok == 1 );
-   }
-
-   init_world(base_line, nb_line);
-
-   PRINTF("*** Completing init at cycle %d ***\n", giet_proctime());
-   barrier_wait(&barriers[0]);
+      while ( init_ok == 0 ) asm volatile("nop");
+   }
+
+   PRINTF("\n*** Starting world initialisation at cycle %d ***\n",
+          giet_proctime() );
+
+   //  parallel world  initialization
+   init_world( base_line , nb_line );
+
+PRINTF("coucou 0\n");
+
+   display_world( base_line , nb_line );
+
+PRINTF("coucou 1\n");
+
+   sqt_barrier_wait( &barrier );
+
+   PRINTF("\n*** Starting life at cycle %d ***\n", 
+          giet_proctime() );
    
    for (i = 0; i < NB_ITERATION; i++)
    {
-      compute_new_gen(base_line, nb_line);
-      grow_old_world(base_line, nb_line);
-      display_world(base_line, nb_line);
-      barrier_wait(&barriers[1]);
-      barrier_init(&barriers[1], nglobal_procs);
-   }
-
-   PRINTF("*** End of main at cycle %d ***\n", giet_proctime());
+      compute_new_gen( base_line, nb_line );
+      grow_old_world( base_line, nb_line );
+      display_world( base_line, nb_line );
+
+      sqt_barrier_wait( &barrier );
+
+      PRINTF(" - iteration %d completed\n", i );
+   }
+
+   PRINTF("\n*** End of main at cycle %d ***\n", giet_proctime());
 
    giet_exit("Completed");