torus.c 41.1 KB
Newer Older
Philip Carns's avatar
Philip Carns committed
1 2 3 4 5 6
/*
 * Copyright (C) 2013 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
 */

7 8 9 10 11 12 13 14
#include <ross.h>
#include <assert.h>

#include "codes/lp-io.h"
#include "codes/codes_mapping.h"
#include "codes/codes.h"
#include "codes/model-net.h"
#include "codes/model-net-method.h"
15 16
#include "codes/model-net-lp.h"
#include "codes/net/torus.h"
17 18 19 20 21 22

#define CHUNK_SIZE 32
#define DEBUG 1
#define MEAN_INTERVAL 100
#define TRACE -1 

23 24 25 26 27 28 29 30
/* collective specific parameters */
#define TREE_DEGREE 4
#define LEVEL_DELAY 1000
#define TORUS_COLLECTIVE_DEBUG 1
#define NUM_COLLECTIVES  1
#define COLLECTIVE_COMPUTATION_DELAY 5700
#define TORUS_FAN_OUT_DELAY 20.0

31 32 33
#define LP_CONFIG_NM (model_net_lp_config_names[TORUS])
#define LP_METHOD_NM (model_net_method_names[TORUS])

34 35
static double maxd(double a, double b) { return a < b ? b : a; }

36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
/* Torus network model implementation of codes, implements the modelnet API */

/* Link bandwidth for each torus link, configurable from the config file */
static double link_bandwidth;
/* buffer size of each torus link, configurable */
static int buffer_size;
/* number of virtual channels for each torus link, configurable */
static int num_vc;
/* number of torus dimensions, configurable */
static int n_dims;
/* length of each torus dimension, configurable */
static int * dim_length;
/* factor, used in torus coordinate calculation */
static int * factor;
/* half length of each dimension, used in torus coordinates calculation */
static int * half_length;
/* size of each torus chunk, by default it is set to 32 */
static int chunk_size;

/* codes mapping group name, lp type name */
56
static char grp_name[MAX_NAME_LENGTH];
57
/* codes mapping group id, lp type id, repetition id and offset */
58
int mapping_grp_id, mapping_rep_id, mapping_type_id, mapping_offset;
59 60 61 62

/* for calculating torus model statistics, average and maximum travel time of a packet */
static tw_stime         total_time = 0;
static tw_stime         max_latency = 0;
63
static tw_stime         max_collective = 0;
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

/* indicates delays calculated through the bandwidth calculation of the torus link */
static float head_delay=0.0;
static float credit_delay = 0.0;

/* number of finished packets on each PE */
static long long       N_finished_packets = 0;
/* total number of hops traversed by a message on each PE */
static long long       total_hops = 0;

/* number of chunks/flits in each torus packet, calculated through the size of each flit (32 bytes by default) */
static uint64_t num_chunks;

typedef struct nodes_state nodes_state;

/* state of a torus node */
struct nodes_state
{
  /* counts the number of packets sent from this compute node */
  unsigned long long packet_counter;            
  /* availability time of each torus link */
  tw_stime** next_link_available_time; 
  /* availability of each torus credit link */
  tw_stime** next_credit_available_time;
  /* next flit generate time */
  tw_stime** next_flit_generate_time;
  /* buffer size for each torus virtual channel */
  int** buffer;
  /* coordinates of the current torus node */
  int* dim_position;
  /* neighbor LP ids for this torus node */
  int* neighbour_minus_lpID;
  int* neighbour_plus_lpID;

  /* records torus statistics for this LP having different communication categories */
  struct mn_stats torus_stats_array[CATEGORY_MAX];
100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125
   /* for collective operations */

  /* collective init time */
  tw_stime collective_init_time;

  /* node ID in the tree */ 
   tw_lpid node_id;

   /* messages sent & received in collectives may get interchanged several times so we have to save the 
     origin server information in the node's state */
   tw_lpid origin_svr; 
  
  /* parent node ID of the current node */
   tw_lpid parent_node_id;
   /* array of children to be allocated in terminal_init*/
   tw_lpid* children;

   /* children of a node can be less than or equal to the tree degree */
   int num_children;

   short is_root;
   short is_leaf;

   /* to maintain a count of child nodes that have fanned in at the parent during the collective
      fan-in phase*/
   int num_fan_nodes;
126 127
};

128
/* setup the torus model, initialize global parameters */
129 130 131 132 133 134 135 136
static void torus_setup(const void* net_params)
{
    int i;
    torus_param* t_param = (torus_param*)net_params;
    n_dims = t_param->n_dims;
    link_bandwidth = t_param->link_bandwidth;
    buffer_size = t_param->buffer_size;
    num_vc = t_param->num_vc;
137 138
    chunk_size = t_param->chunk_size;
    head_delay = (1 / link_bandwidth) * chunk_size;
139 140 141 142
    credit_delay = (1 / link_bandwidth) * 8;
    dim_length = malloc(n_dims * sizeof(int));
    factor = malloc(n_dims * sizeof(int));
    half_length = malloc(n_dims * sizeof(int));
143
   
144
    for(i = 0; i < n_dims; i++)
145 146 147 148 149
    {
       dim_length[i] = t_param->dim_length[i]; 
       if(!dim_length[i])
	       dim_length[i] = 8;
    }
150 151
}

152 153 154
void torus_collective_init(nodes_state * s,
           		   tw_lp * lp)
{
155 156 157
    // TODO: be annotation-aware somehow 
    codes_mapping_get_lp_info(lp->gid, grp_name, &mapping_grp_id, NULL, &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
    int num_lps = codes_mapping_get_lp_count(grp_name, 1, LP_CONFIG_NM, NULL, 1);
158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206
    int num_reps = codes_mapping_get_group_reps(grp_name);
    s->node_id = (mapping_rep_id * num_lps) + mapping_offset;

    int i;
   /* handle collective operations by forming a tree of all the LPs */
   /* special condition for root of the tree */
   if( s->node_id == 0)
    {
        s->parent_node_id = -1;
        s->is_root = 1;
   }
   else
   {
       s->parent_node_id = (s->node_id - ((s->node_id - 1) % TREE_DEGREE)) / TREE_DEGREE;
       s->is_root = 0;
   }
   s->children = (tw_lpid*)malloc(TREE_DEGREE * sizeof(tw_lpid));

   /* set the isleaf to zero by default */
   s->is_leaf = 1;
   s->num_children = 0;

   /* calculate the children of the current node. If its a leaf, no need to set children,
      only set isleaf and break the loop*/

   for( i = 0; i < TREE_DEGREE; i++ )
    {
        tw_lpid next_child = (TREE_DEGREE * s->node_id) + i + 1;
        if(next_child < (num_lps * num_reps))
        {
            s->num_children++;
            s->is_leaf = 0;
            s->children[i] = next_child;
        }
        else
           s->children[i] = -1;
    }

#if TORUS_COLLECTIVE_DEBUG == 1
   printf("\n LP %ld parent node id ", s->node_id);

   for( i = 0; i < TREE_DEGREE; i++ )
        printf(" child node ID %ld ", s->children[i]);
   printf("\n");

   if(s->is_leaf)
        printf("\n LP %ld is leaf ", s->node_id);
#endif
}
207
/* torus packet reverse event */
208 209 210 211 212 213
static void torus_packet_event_rc(tw_lp *sender)
{
  codes_local_latency_reverse(sender);
  return;
}

214 215 216 217 218 219
/* returns the torus message size */
static int torus_get_msg_sz(void)
{
   return sizeof(nodes_message);
}

220
/* torus packet event , generates a torus packet on the compute node */
221
static tw_stime torus_packet_event(char* category, tw_lpid final_dest_lp, uint64_t packet_size, int is_pull, uint64_t pull_size, tw_stime offset, int remote_event_size, const void* remote_event, int self_event_size, const void* self_event, tw_lpid src_lp, tw_lp *sender, int is_last_pckt)
222 223 224 225
{
    tw_event * e_new;
    tw_stime xfer_to_nic_time;
    nodes_message * msg;
226
    tw_lpid dest_nic_id;
227 228 229
    char* tmp_ptr;
   
    int mapping_grp_id, mapping_rep_id, mapping_type_id, mapping_offset;
230 231 232 233 234
    // TODO: be annotation-aware
    codes_mapping_get_lp_info(final_dest_lp, grp_name, &mapping_grp_id, NULL,
            &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
    codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1, mapping_rep_id,
            mapping_offset, &dest_nic_id);
235 236

    /* TODO: Should send the packets in correct sequence. Currently the last packet is being sent first due to codes_local_latency offset. */
237
    xfer_to_nic_time = g_tw_lookahead + codes_local_latency(sender); /* Throws an error of found last KP time > current event time otherwise */
238 239 240 241
    //e_new = tw_event_new(local_nic_id, xfer_to_nic_time+offset, sender);
    //msg = tw_event_data(e_new);
    e_new = model_net_method_event_new(sender->gid, xfer_to_nic_time+offset,
            sender, TORUS, (void**)&msg, (void**)&tmp_ptr);
242 243 244
    strcpy(msg->category, category);
    msg->final_dest_gid = final_dest_lp;
    msg->dest_lp = dest_nic_id;
245
    msg->sender_svr= src_lp;
246 247 248 249
    msg->packet_size = packet_size;
    msg->remote_event_size_bytes = 0;
    msg->local_event_size_bytes = 0;
    msg->type = GENERATE;
250 251
    msg->is_pull = is_pull;
    msg->pull_size = pull_size;
252 253 254 255 256 257 258
    
    num_chunks = msg->packet_size/chunk_size;

    if(msg->packet_size % chunk_size)
    {
	    num_chunks++;
    }
259 260 261 262 263 264 265 266 267 268 269 270 271 272 273

    if(is_last_pckt) /* Its the last packet so pass in remote event information*/
     {
	if(remote_event_size > 0)
	 {
	    msg->remote_event_size_bytes = remote_event_size;
	    memcpy(tmp_ptr, remote_event, remote_event_size);
	    tmp_ptr += remote_event_size;
         }
	if(self_event_size > 0)
	{
	   msg->local_event_size_bytes = self_event_size;
	   memcpy(tmp_ptr, self_event, self_event_size);
	   tmp_ptr += self_event_size;
	}
274
      // printf("\n torus remote event %d local event %d last packet %d %lf ", msg->remote_event_size_bytes, msg->local_event_size_bytes, is_last_pckt, xfer_to_nic_time);
275 276
     }
    tw_event_send(e_new);
277
    return xfer_to_nic_time;
278
}
279

280 281 282 283 284 285 286
/*Initialize the torus model, this initialization part is borrowed from Ning's torus model */
static void torus_init( nodes_state * s, 
	   tw_lp * lp )
{
    int i, j;
    int dim_N[ n_dims + 1 ];

287 288
    // TODO: be annotation-aware 
    codes_mapping_get_lp_info(lp->gid, grp_name, &mapping_grp_id, NULL, &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
289 290

    dim_N[ 0 ]=mapping_rep_id + mapping_offset;
291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341

    s->neighbour_minus_lpID = (int*)malloc(n_dims * sizeof(int));
    s->neighbour_plus_lpID = (int*)malloc(n_dims * sizeof(int));
    s->dim_position = (int*)malloc(n_dims * sizeof(int));
    s->buffer = (int**)malloc(2*n_dims * sizeof(int*));
    s->next_link_available_time = (tw_stime**)malloc(2*n_dims * sizeof(tw_stime*));
    s->next_credit_available_time = (tw_stime**)malloc(2*n_dims * sizeof(tw_stime*));
    s->next_flit_generate_time = (tw_stime**)malloc(2*n_dims*sizeof(tw_stime*));

    for(i=0; i < 2*n_dims; i++)
    {
	s->buffer[i] = (int*)malloc(num_vc * sizeof(int));
	s->next_link_available_time[i] = (tw_stime*)malloc(num_vc * sizeof(tw_stime));
	s->next_credit_available_time[i] = (tw_stime*)malloc(num_vc * sizeof(tw_stime));
	s->next_flit_generate_time[i] = (tw_stime*)malloc(num_vc * sizeof(tw_stime));
    }

    //printf("\n LP ID %d ", (int)lp->gid);
  // calculate my torus co-ordinates
  for ( i=0; i < n_dims; i++ ) 
    {
      s->dim_position[ i ] = dim_N[ i ]%dim_length[ i ];
      //printf(" dim position %d ", s->dim_position[i]);
      dim_N[ i + 1 ] = ( dim_N[ i ] - s->dim_position[ i ] )/dim_length[ i ];

      half_length[ i ] = dim_length[ i ] / 2;
    }
   //printf("\n");

  factor[ 0 ] = 1;
  for ( i=1; i < n_dims; i++ )
    {
      factor[ i ] = 1;
      for ( j = 0; j < i; j++ )
        factor[ i ] *= dim_length[ j ];
    }
  int temp_dim_pos[ n_dims ];
  for ( i = 0; i < n_dims; i++ )
    temp_dim_pos[ i ] = s->dim_position[ i ];

  tw_lpid neighbor_id;
  // calculate minus neighbour's lpID
  for ( j = 0; j < n_dims; j++ )
    {
      temp_dim_pos[ j ] = (s->dim_position[ j ] -1 + dim_length[ j ]) % dim_length[ j ];

      s->neighbour_minus_lpID[ j ] = 0;
      
      for ( i = 0; i < n_dims; i++ )
        s->neighbour_minus_lpID[ j ] += factor[ i ] * temp_dim_pos[ i ];
      
342 343
      codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1,
              s->neighbour_minus_lpID[ j ], 0, &neighbor_id);
344 345 346 347 348 349 350 351 352 353 354 355 356 357
      //printf("\n neighbor %d lp id %d ", (int)s->neighbour_minus_lpID[ j ], (int)neighbor_id);
      
      temp_dim_pos[ j ] = s->dim_position[ j ];
    }
  // calculate plus neighbour's lpID
  for ( j = 0; j < n_dims; j++ )
    {
      temp_dim_pos[ j ] = ( s->dim_position[ j ] + 1 + dim_length[ j ]) % dim_length[ j ];

      s->neighbour_plus_lpID[ j ] = 0;
      
      for ( i = 0; i < n_dims; i++ )
        s->neighbour_plus_lpID[ j ] += factor[ i ] * temp_dim_pos[ i ];

358 359
      codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1,
              s->neighbour_plus_lpID[ j ], 0, &neighbor_id);
360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376
      //printf("\n neighbor %d lp id %d ", (int)s->neighbour_plus_lpID[ j ], (int)neighbor_id);
      
      temp_dim_pos[ j ] = s->dim_position[ j ];
    }

  //printf("\n");
  for( j=0; j < 2 * n_dims; j++ )
   {
    for( i = 0; i < num_vc; i++ )
     {
       s->buffer[ j ][ i ] = 0; 
       s->next_link_available_time[ j ][ i ] = 0.0;
       s->next_credit_available_time[j][i] = 0.0; 
     }
   }
  // record LP time
    s->packet_counter = 0;
377 378 379 380 381 382 383 384 385 386 387 388 389
    torus_collective_init(s, lp);
}


/* collective operation for the torus network */
void torus_collective(char* category, int message_size, int remote_event_size, const void* remote_event, tw_lp* sender)
{
    tw_event * e_new;
    tw_stime xfer_to_nic_time;
    nodes_message * msg;
    tw_lpid local_nic_id;
    char* tmp_ptr;

390 391 392 393 394
    // TODO: be annotation-aware
    codes_mapping_get_lp_info(sender->gid, grp_name, &mapping_grp_id, NULL,
            &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
    codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1,
            mapping_rep_id, mapping_offset, &local_nic_id);
395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464

    xfer_to_nic_time = g_tw_lookahead + codes_local_latency(sender);
    e_new = model_net_method_event_new(local_nic_id, xfer_to_nic_time,
            sender, TORUS, (void**)&msg, (void**)&tmp_ptr);

    msg->remote_event_size_bytes = message_size;
    strcpy(msg->category, category);
    msg->sender_svr=sender->gid;
    msg->type = T_COLLECTIVE_INIT;

    tmp_ptr = (char*)msg;
    tmp_ptr += torus_get_msg_sz();
    if(remote_event_size > 0)
     {
            msg->remote_event_size_bytes = remote_event_size;
            memcpy(tmp_ptr, remote_event, remote_event_size);
            tmp_ptr += remote_event_size;
     }

    tw_event_send(e_new);
    return;
}

/* reverse for collective operation of the dragonfly network */
void torus_collective_rc(int message_size, tw_lp* sender)
{
     codes_local_latency_reverse(sender);
     return;
}

static void send_remote_event(nodes_state * s,
                        tw_bf * bf,
                        nodes_message * msg,
                        tw_lp * lp)
{
    // Trigger an event on receiving server
    if(msg->remote_event_size_bytes)
     {
            tw_event* e;
            tw_stime ts;
            nodes_message * m;
            ts = (1/link_bandwidth) * msg->remote_event_size_bytes;
            e = codes_event_new(s->origin_svr, ts, lp);
            m = tw_event_data(e);
            char* tmp_ptr = (char*)msg;
            tmp_ptr += torus_get_msg_sz();
            memcpy(m, tmp_ptr, msg->remote_event_size_bytes);
            tw_event_send(e);
     }
}

static void node_collective_init(nodes_state * s,
                        tw_bf * bf,
                        nodes_message * msg,
                        tw_lp * lp)
{
        tw_event * e_new;
        tw_lpid parent_nic_id;
        tw_stime xfer_to_nic_time;
        nodes_message * msg_new;
        int num_lps;

        msg->saved_collective_init_time = s->collective_init_time;
        s->collective_init_time = tw_now(lp);
	s->origin_svr = msg->sender_svr;
	
        if(s->is_leaf)
        {
            //printf("\n LP %ld sending message to parent %ld ", s->node_id, s->parent_node_id);
            /* get the global LP ID of the parent node */
465 466 467 468 469 470 471 472
            // TODO: be annotation-aware
            codes_mapping_get_lp_info(lp->gid, grp_name, &mapping_grp_id, NULL,
                    &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
            num_lps = codes_mapping_get_lp_count(grp_name, 1, LP_CONFIG_NM,
                    NULL, 1);
            codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1,
                    s->parent_node_id/num_lps, (s->parent_node_id % num_lps),
                    &parent_nic_id);
473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502

           /* send a message to the parent that the LP has entered the collective operation */
            xfer_to_nic_time = g_tw_lookahead + LEVEL_DELAY;
            //e_new = codes_event_new(parent_nic_id, xfer_to_nic_time, lp);
	    void* m_data;
	    e_new = model_net_method_event_new(parent_nic_id, xfer_to_nic_time,
            	lp, TORUS, (void**)&msg_new, (void**)&m_data);
	    	
            memcpy(msg_new, msg, sizeof(nodes_message));
	    if (msg->remote_event_size_bytes){
        	memcpy(m_data, model_net_method_get_edata(TORUS, msg),
                	msg->remote_event_size_bytes);
      	    }
	    
            msg_new->type = T_COLLECTIVE_FAN_IN;
            msg_new->sender_node = s->node_id;

            tw_event_send(e_new);
        }
        return;
}

static void node_collective_fan_in(nodes_state * s,
                        tw_bf * bf,
                        nodes_message * msg,
                        tw_lp * lp)
{
        int i;
        s->num_fan_nodes++;

503 504 505 506 507
        // TODO: be annotation-aware
        codes_mapping_get_lp_info(lp->gid, grp_name, &mapping_grp_id, NULL,
                &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
        int num_lps = codes_mapping_get_lp_count(grp_name, 1, LP_CONFIG_NM,
                NULL, 1);
508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525

        tw_event* e_new;
        nodes_message * msg_new;
        tw_stime xfer_to_nic_time;

        bf->c1 = 0;
        bf->c2 = 0;

        /* if the number of fanned in nodes have completed at the current node then signal the parent */
        if((s->num_fan_nodes == s->num_children) && !s->is_root)
        {
            bf->c1 = 1;
            msg->saved_fan_nodes = s->num_fan_nodes-1;
            s->num_fan_nodes = 0;
            tw_lpid parent_nic_id;
            xfer_to_nic_time = g_tw_lookahead + LEVEL_DELAY;

            /* get the global LP ID of the parent node */
526 527 528
            codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1,
                    s->parent_node_id/num_lps, (s->parent_node_id % num_lps),
                    &parent_nic_id);
529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564

           /* send a message to the parent that the LP has entered the collective operation */
            //e_new = codes_event_new(parent_nic_id, xfer_to_nic_time, lp);
            //msg_new = tw_event_data(e_new);
	    void * m_data;
      	    e_new = model_net_method_event_new(parent_nic_id,
              xfer_to_nic_time,
              lp, TORUS, (void**)&msg_new, &m_data);
	    
            memcpy(msg_new, msg, sizeof(nodes_message));
            msg_new->type = T_COLLECTIVE_FAN_IN;
            msg_new->sender_node = s->node_id;

            if (msg->remote_event_size_bytes){
	        memcpy(m_data, model_net_method_get_edata(TORUS, msg),
        	        msg->remote_event_size_bytes);
      	   }
	    
            tw_event_send(e_new);
      }

      /* root node starts off with the fan-out phase */
      if(s->is_root && (s->num_fan_nodes == s->num_children))
      {
           bf->c2 = 1;
           msg->saved_fan_nodes = s->num_fan_nodes-1;
           s->num_fan_nodes = 0;
           send_remote_event(s, bf, msg, lp);

           for( i = 0; i < s->num_children; i++ )
           {
                tw_lpid child_nic_id;
                /* Do some computation and fan out immediate child nodes from the collective */
                xfer_to_nic_time = g_tw_lookahead + COLLECTIVE_COMPUTATION_DELAY + LEVEL_DELAY + tw_rand_exponential(lp->rng, (double)LEVEL_DELAY/50);

                /* get global LP ID of the child node */
565 566 567
                codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1,
                        s->children[i]/num_lps, (s->children[i] % num_lps),
                        &child_nic_id);
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587
                //e_new = codes_event_new(child_nic_id, xfer_to_nic_time, lp);

                //msg_new = tw_event_data(e_new);
                void * m_data;
	        e_new = model_net_method_event_new(child_nic_id,
                xfer_to_nic_time,
		lp, TORUS, (void**)&msg_new, &m_data);

		memcpy(msg_new, msg, sizeof(nodes_message));
	        if (msg->remote_event_size_bytes){
	                memcpy(m_data, model_net_method_get_edata(TORUS, msg),
        	               msg->remote_event_size_bytes);
      		}
		
                msg_new->type = T_COLLECTIVE_FAN_OUT;
                msg_new->sender_node = s->node_id;

                tw_event_send(e_new);
           }
      }
588
}
589 590 591 592 593 594 595
	     
static void node_collective_fan_out(nodes_state * s,
                        tw_bf * bf,
                        nodes_message * msg,
                        tw_lp * lp)
{
        int i;
596 597 598
        //TODO: be annotation-aware
        int num_lps = codes_mapping_get_lp_count(grp_name, 1, LP_CONFIG_NM,
                NULL, 1);
599 600 601 602
        bf->c1 = 0;
        bf->c2 = 0;

        send_remote_event(s, bf, msg, lp);
603

604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619
        if(!s->is_leaf)
        {
            bf->c1 = 1;
            tw_event* e_new;
            nodes_message * msg_new;
            tw_stime xfer_to_nic_time;

           for( i = 0; i < s->num_children; i++ )
           {
                xfer_to_nic_time = g_tw_lookahead + TORUS_FAN_OUT_DELAY + tw_rand_exponential(lp->rng, (double)TORUS_FAN_OUT_DELAY/10);

                if(s->children[i] > 0)
                {
                        tw_lpid child_nic_id;

                        /* get global LP ID of the child node */
620 621 622
                        codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1,
                                s->children[i]/num_lps,
                                (s->children[i] % num_lps), &child_nic_id);
623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650
                        //e_new = codes_event_new(child_nic_id, xfer_to_nic_time, lp);
                        //msg_new = tw_event_data(e_new);
                        //memcpy(msg_new, msg, sizeof(nodes_message) + msg->remote_event_size_bytes);
			void* m_data;
			e_new = model_net_method_event_new(child_nic_id,
							xfer_to_nic_time,
					                lp, TORUS, (void**)&msg_new, &m_data);
		        memcpy(msg_new, msg, sizeof(nodes_message));
		        if (msg->remote_event_size_bytes){
			        memcpy(m_data, model_net_method_get_edata(TORUS, msg),
			                msg->remote_event_size_bytes);
      			}


                        msg_new->type = T_COLLECTIVE_FAN_OUT;
                        msg_new->sender_node = s->node_id;
                        tw_event_send(e_new);
                }
           }
         }
	//printf("\n Fan out phase completed %ld ", lp->gid);
        if(max_collective < tw_now(lp) - s->collective_init_time )
          {
              bf->c2 = 1;
              max_collective = tw_now(lp) - s->collective_init_time;
          }
}
    
651 652 653 654 655 656 657 658 659 660 661
/*Returns the next neighbor to which the packet should be routed by using DOR (Taken from Ning's code of the torus model)*/
static void dimension_order_routing( nodes_state * s,
			     tw_lpid * dst_lp, 
			     int * dim, 
			     int * dir )
{
  int dim_N[n_dims], 
      dest[n_dims],
      i,
      dest_id=0;

662 663
  //TODO: be annotation-aware
  codes_mapping_get_lp_info(*dst_lp, grp_name, &mapping_grp_id, NULL, &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
664
  dim_N[ 0 ]=mapping_rep_id + mapping_offset;
665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703

  // find destination dimensions using destination LP ID 
  for ( i = 0; i < n_dims; i++ )
    {
      dest[ i ] = dim_N[ i ] % dim_length[ i ];
      dim_N[ i + 1 ] = ( dim_N[ i ] - dest[ i ] ) / dim_length[ i ];
    }

  for( i = 0; i < n_dims; i++ )
    {
      if ( s->dim_position[ i ] - dest[ i ] > half_length[ i ] )
	{
	  dest_id = s->neighbour_plus_lpID[ i ];
	  *dim = i;
	  *dir = 1;
	  break;
	}
      if ( s->dim_position[ i ] - dest[ i ] < -half_length[ i ] )
	{
	  dest_id = s->neighbour_minus_lpID[ i ];
	  *dim = i;
	  *dir = 0;
	  break;
	}
      if ( ( s->dim_position[ i ] - dest[ i ] <= half_length[ i ] ) && ( s->dim_position[ i ] - dest[ i ] > 0 ) )
	{
	  dest_id = s->neighbour_minus_lpID[ i ];
	  *dim = i;
	  *dir = 0;
	  break;
	}
      if (( s->dim_position[ i ] - dest[ i ] >= -half_length[ i ] ) && ( s->dim_position[ i ] - dest[ i ] < 0) )
	{
	  dest_id = s->neighbour_plus_lpID[ i ];
	  *dim = i;
	  *dir = 1;
	  break;
	}
    }
704
  codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1, dest_id, 0, dst_lp);
705
}
706 707 708 709 710 711

/*Generates a packet. If there is a buffer slot available, then the packet is 
injected in the network. Else, a buffer overflow exception is thrown.
TODO: We might want to modify this so that if the buffer is full, the packet
injection is delayed in turn slowing down the injection rate. The average achieved
injection rate can be reported at the end of the simulation. */
712 713 714 715 716 717
static void packet_generate( nodes_state * s, 
		tw_bf * bf, 
		nodes_message * msg, 
		tw_lp * lp )
{
//    printf("\n msg local event size %d remote event size %d ", msg->local_event_size_bytes, msg->remote_event_size_bytes);
718
    int j, tmp_dir=-1, tmp_dim=-1, total_event_size;
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733
    tw_stime ts;

//    event triggered when packet head is sent
    tw_event * e_h;
    nodes_message *m;

    tw_lpid dst_lp = msg->dest_lp; 
    dimension_order_routing( s, &dst_lp, &tmp_dim, &tmp_dir );

    msg->saved_src_dim = tmp_dim;
    msg->saved_src_dir = tmp_dir;

    //msg->saved_available_time = s->next_flit_generate_time[(2*tmp_dim) + tmp_dir][0];
    msg->travel_start_time = tw_now(lp);
    msg->packet_ID = lp->gid + g_tw_nlp * s->packet_counter;
734
    msg->my_N_hop = 0;
735

736

737 738 739 740 741 742 743 744 745 746 747 748
    s->packet_counter++;

    if(msg->packet_ID == TRACE)
	    printf("\n packet generated %lld at lp %d dest %d final dest %d", msg->packet_ID, (int)lp->gid, (int)dst_lp, (int)msg->dest_lp);
    for(j = 0; j < num_chunks; j++)
    { 
     if(s->buffer[ tmp_dir + ( tmp_dim * 2 ) ][ 0 ] < buffer_size)
      {
       ts = j + tw_rand_exponential(lp->rng, MEAN_INTERVAL/200);
       //s->next_flit_generate_time[(2*tmp_dim) + tmp_dir][0] = max(s->next_flit_generate_time[(2*tmp_dim) + tmp_dir][0], tw_now(lp));
       //s->next_flit_generate_time[(2*tmp_dim) + tmp_dir][0] += ts;
       //e_h = tw_event_new( lp->gid, s->next_flit_generate_time[(2*tmp_dim) + tmp_dir][0] - tw_now(lp), lp);
749
       //e_h = tw_event_new(lp->gid, ts, lp);
750 751 752
       msg->source_direction = tmp_dir;
       msg->source_dim = tmp_dim;

753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769
       void *m_data;
       e_h = model_net_method_event_new(lp->gid, ts, lp, TORUS, (void**)&m,
               (void**)&m_data);

       //m = tw_event_data( e_h );
       //memcpy(m, msg, torus_get_msg_sz() + msg->local_event_size_bytes + msg->remote_event_size_bytes);
       void *m_data_src = model_net_method_get_edata(TORUS, msg);
       memcpy(m, msg, sizeof(nodes_message));
       if (msg->remote_event_size_bytes){
           memcpy(m_data, m_data_src,
                   msg->remote_event_size_bytes);
           m_data = (char*)m_data + msg->remote_event_size_bytes;
           m_data_src = (char*)m_data_src + msg->remote_event_size_bytes;
       }
       if (msg->local_event_size_bytes){
           memcpy(m_data, m_data_src, msg->local_event_size_bytes);
       }
770 771 772 773 774 775 776 777 778 779 780 781
       m->next_stop = dst_lp;
       m->chunk_id = j;

      // find destination dimensions using destination LP ID 
       m->type = SEND;
       m->source_direction = tmp_dir;
       m->source_dim = tmp_dim;
       tw_event_send(e_h);
      }
      else 
       {
   printf("\n %d Packet queued in line increase buffer space, dir %d dim %d buffer space %d dest LP %d ", (int)lp->gid, tmp_dir, tmp_dim, s->buffer[ tmp_dir + ( tmp_dim * 2 ) ][ 0 ], (int)msg->dest_lp);
782 783
       MPI_Finalize();
       exit(-1); 
784 785
       }
   }
786

787
   total_event_size = model_net_get_msg_sz(TORUS) + msg->remote_event_size_bytes + msg->local_event_size_bytes;   
788 789 790 791 792 793 794 795 796
   /* record the statistics of the generated packets */
   mn_stats* stat;
   stat = model_net_find_stats(msg->category, s->torus_stats_array);
   stat->send_count++;  
   stat->send_bytes += msg->packet_size;
   stat->send_time += (1/link_bandwidth) * msg->packet_size;
   /* record the maximum ROSS event size */
   if(stat->max_event_size < total_event_size)
	   stat->max_event_size = total_event_size;
797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815
}
/*Sends a 8-byte credit back to the torus node LP that sent the message */
static void credit_send( nodes_state * s, 
	    tw_bf * bf, 
	    tw_lp * lp, 
	    nodes_message * msg)
{
#if DEBUG
//if(lp->gid == TRACK_LP)
//	printf("\n (%lf) sending credit tmp_dir %d tmp_dim %d %lf ", tw_now(lp), msg->source_direction, msg->source_dim, credit_delay );
#endif
    bf->c1 = 0;
    tw_event * buf_e;
    nodes_message *m;
    tw_stime ts;
    int src_dir = msg->source_direction;
    int src_dim = msg->source_dim;

    msg->saved_available_time = s->next_credit_available_time[(2 * src_dim) + src_dir][0];
816
    s->next_credit_available_time[(2 * src_dim) + src_dir][0] = maxd(s->next_credit_available_time[(2 * src_dim) + src_dir][0], tw_now(lp));
817 818 819
    ts =  credit_delay + tw_rand_exponential(lp->rng, credit_delay/1000);
    s->next_credit_available_time[(2 * src_dim) + src_dir][0] += ts;

820 821
    //buf_e = tw_event_new( msg->sender_lp, s->next_credit_available_time[(2 * src_dim) + src_dir][0] - tw_now(lp), lp);
    //m = tw_event_data(buf_e);
822
    buf_e = model_net_method_event_new(msg->sender_node,
823 824
            s->next_credit_available_time[(2*src_dim) + src_dir][0] - tw_now(lp),
            lp, TORUS, (void**)&m, NULL);
825 826 827 828 829 830
    m->source_direction = msg->source_direction;
    m->source_dim = msg->source_dim;

    m->type = CREDIT;
    tw_event_send( buf_e );
}
831 832
/* send a packet from one torus node to another torus node
 A packet can be up to 256 bytes on BG/L and BG/P and up to 512 bytes on BG/Q */
833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856
static void packet_send( nodes_state * s, 
	         tw_bf * bf, 
		 nodes_message * msg, 
		 tw_lp * lp )
{ 
    bf->c2 = 0;
    bf->c1 = 0;
    int tmp_dir, tmp_dim;
    tw_stime ts;
    tw_event *e;
    nodes_message *m;
    tw_lpid dst_lp = msg->dest_lp;
    dimension_order_routing( s, &dst_lp, &tmp_dim, &tmp_dir );     

    if(s->buffer[ tmp_dir + ( tmp_dim * 2 ) ][ 0 ] < buffer_size)
    {
       bf->c2 = 1;
       msg->saved_src_dir = tmp_dir;
       msg->saved_src_dim = tmp_dim;
       ts = tw_rand_exponential( lp->rng, ( double )head_delay/200 )+ head_delay;

//    For reverse computation 
      msg->saved_available_time = s->next_link_available_time[tmp_dir + ( tmp_dim * 2 )][0];

857
      s->next_link_available_time[tmp_dir + ( tmp_dim * 2 )][0] = maxd( s->next_link_available_time[ tmp_dir + ( tmp_dim * 2 )][0], tw_now(lp) );
858 859
      s->next_link_available_time[tmp_dir + ( tmp_dim * 2 )][0] += ts;
    
860 861 862 863 864 865 866 867 868 869 870 871
      //e = tw_event_new( dst_lp, s->next_link_available_time[tmp_dir + ( tmp_dim * 2 )][0] - tw_now(lp), lp );
      //m = tw_event_data( e );
      //memcpy(m, msg, torus_get_msg_sz() + msg->remote_event_size_bytes);
      void * m_data;
      e = model_net_method_event_new(dst_lp, 
              s->next_link_available_time[tmp_dir+(tmp_dim*2)][0] - tw_now(lp),
              lp, TORUS, (void**)&m, &m_data);
      memcpy(m, msg, sizeof(nodes_message));
      if (msg->remote_event_size_bytes){
        memcpy(m_data, model_net_method_get_edata(TORUS, msg),
                msg->remote_event_size_bytes);
      }
872 873 874 875 876 877 878 879
      m->type = ARRIVAL;

      if(msg->packet_ID == TRACE)
        printf("\n lp %d packet %lld flit id %d being sent to %d after time %lf ", (int) lp->gid, msg->packet_ID, msg->chunk_id, (int)dst_lp, s->next_link_available_time[tmp_dir + ( tmp_dim * 2 )][0] - tw_now(lp)); 
      //Carry on the message info
      m->source_dim = tmp_dim;
      m->source_direction = tmp_dir;
      m->next_stop = dst_lp;
880
      m->sender_node = lp->gid;
881 882 883 884 885 886 887 888 889
      m->local_event_size_bytes = 0; /* We just deliver the local event here */

      tw_event_send( e );

      s->buffer[ tmp_dir + ( tmp_dim * 2 ) ][ 0 ]++;
    
      if(msg->chunk_id == num_chunks - 1)
      {
        bf->c1 = 1;
890
	/* Invoke an event on the sending server */
891 892 893 894
	if(msg->local_event_size_bytes > 0)
	{
          tw_event* e_new;
	  nodes_message* m_new;
895
	  void* local_event;
896
	  ts = (1/link_bandwidth) * msg->local_event_size_bytes;
897
	  e_new = tw_event_new(msg->sender_svr, ts, lp);
898
	  m_new = tw_event_data(e_new);
899 900 901 902
	  //local_event = (char*)msg;
	  //local_event += torus_get_msg_sz() + msg->remote_event_size_bytes;
          local_event = (char*)model_net_method_get_edata(TORUS, msg) +
              msg->remote_event_size_bytes;
903 904 905 906 907 908
	  memcpy(m_new, local_event, msg->local_event_size_bytes);
	  tw_event_send(e_new);
	}
     }
  } // end if
    else
909
    {
910
	    printf("\n buffer overflown ");
911 912 913
	    MPI_Finalize();
	    exit(-1);
    }
914 915
}

916 917 918
/*Processes the packet after it arrives from the neighboring torus node 
 * routes it to the next compute node if this is not the destination
 * OR if this is the destination then a remote event at the server is issued. */
919 920 921 922 923 924 925 926 927
static void packet_arrive( nodes_state * s, 
		    tw_bf * bf, 
		    nodes_message * msg, 
		    tw_lp * lp )
{
  bf->c2 = 0;
  tw_event *e;
  tw_stime ts;
  nodes_message *m;
928
  mn_stats* stat;
929

930
  credit_send( s, bf, lp, msg); 
931 932 933 934 935 936 937 938 939 940
  
  msg->my_N_hop++;
  ts = 0.1 + tw_rand_exponential(lp->rng, MEAN_INTERVAL/200);
  if(msg->packet_ID == TRACE)
	  printf("\n packet arrived at lp %d final dest %d ", (int)lp->gid, (int)msg->dest_lp);
  if( lp->gid == msg->dest_lp )
    {   
        if( msg->chunk_id == num_chunks - 1 )    
        {
	    bf->c2 = 1;
941 942 943 944 945 946
	    stat = model_net_find_stats(msg->category, s->torus_stats_array);
	    stat->recv_count++;
	    stat->recv_bytes += msg->packet_size;
	    stat->recv_time += tw_now( lp ) - msg->travel_start_time;

	    /*count the number of packets completed overall*/
947 948 949 950 951 952 953 954 955 956 957 958 959
	    N_finished_packets++;
	    total_time += tw_now( lp ) - msg->travel_start_time;
	    total_hops += msg->my_N_hop;

	    if (max_latency < tw_now( lp ) - msg->travel_start_time) {
		  bf->c3 = 1;
		  msg->saved_available_time = max_latency;
	          max_latency=tw_now( lp ) - msg->travel_start_time;
     		}
	    // Trigger an event on receiving server
	    if(msg->remote_event_size_bytes)
	    {
	       ts = (1/link_bandwidth) * msg->remote_event_size_bytes;
960
               void *tmp_ptr = model_net_method_get_edata(TORUS, msg);
961
               if (msg->is_pull){
962
                   int net_id = model_net_get_id(LP_METHOD_NM);
963
                   model_net_event(net_id, msg->category, msg->sender_svr,
964 965 966 967 968 969 970 971 972
                           msg->pull_size, ts, msg->remote_event_size_bytes,
                           tmp_ptr, 0, NULL, lp);
               }
               else{
                   e = tw_event_new(msg->final_dest_gid, ts, lp);
                   m = tw_event_data(e);
                   memcpy(m, tmp_ptr, msg->remote_event_size_bytes);
                   tw_event_send(e);
               }
973 974 975 976 977
	    }
       }
    }
  else
    {
978 979 980 981 982 983 984 985 986 987 988
      //e = tw_event_new(lp->gid, ts , lp);
      //m = tw_event_data( e );
      //memcpy(m, msg, torus_get_msg_sz() + msg->remote_event_size_bytes);
      void *m_data;
      e = model_net_method_event_new(lp->gid, ts, lp, TORUS, (void**)&m,
              &m_data);
      memcpy(m, msg, sizeof(nodes_message));
      if (msg->remote_event_size_bytes){
        memcpy(m_data, model_net_method_get_edata(TORUS, msg),
                msg->remote_event_size_bytes);
      }
989 990 991 992 993 994
      m->type = SEND;
      m->next_stop = -1;
      tw_event_send(e);
   }
}

995 996
/* reports torus statistics like average packet latency, maximum packet latency and average
 * number of torus hops traversed by the packet */
997 998
static void torus_report_stats()
{
999
    long long avg_hops, total_finished_packets;
1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011
    tw_stime avg_time, max_time;

    MPI_Reduce( &total_hops, &avg_hops, 1, MPI_LONG_LONG, MPI_SUM, 0, MPI_COMM_WORLD);
    MPI_Reduce( &N_finished_packets, &total_finished_packets, 1, MPI_LONG_LONG, MPI_SUM, 0, MPI_COMM_WORLD);
    MPI_Reduce( &total_time, &avg_time, 1,MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD);
    MPI_Reduce( &max_latency, &max_time, 1, MPI_DOUBLE, MPI_MAX, 0, MPI_COMM_WORLD);

    if(!g_tw_mynode)
     {
       printf(" Average number of hops traversed %f average message latency %lf us maximum message latency %lf us \n", (float)avg_hops/total_finished_packets, avg_time/(total_finished_packets*1000), max_time/1000);
     }
}
1012
/* finalize the torus node and free all event buffers available */
1013 1014 1015
void
final( nodes_state * s, tw_lp * lp )
{
1016
  model_net_print_stats(lp->gid, &s->torus_stats_array[0]); 
1017 1018 1019 1020 1021 1022
  free(s->next_link_available_time);
  free(s->next_credit_available_time);
  free(s->next_flit_generate_time);
  free(s->buffer); 
}

1023
/* increments the buffer count after a credit arrives from the remote compute node */
1024 1025 1026 1027
static void packet_buffer_process( nodes_state * s, tw_bf * bf, nodes_message * msg, tw_lp * lp )
{
   s->buffer[ msg->source_direction + ( msg->source_dim * 2 ) ][  0 ]--;
}
1028

1029
/* reverse handler for torus node */
1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
static void node_rc_handler(nodes_state * s, tw_bf * bf, nodes_message * msg, tw_lp * lp)
{
  switch(msg->type)
    {
       case GENERATE:
		   {
		     s->packet_counter--;
		     int i;//, saved_dim, saved_dir;
	 	     //saved_dim = msg->saved_src_dim;
		     //saved_dir = msg->saved_src_dir;

		     //s->next_flit_generate_time[(saved_dim * 2) + saved_dir][0] = msg->saved_available_time;
		     for(i=0; i < num_chunks; i++)
1043 1044 1045 1046 1047 1048
  		        tw_rand_reverse_unif(lp->rng);
	     	     mn_stats* stat;
		     stat = model_net_find_stats(msg->category, s->torus_stats_array);
		     stat->send_count--; 
		     stat->send_bytes -= msg->packet_size;
		     stat->send_time -= (1/link_bandwidth) * msg->packet_size;
1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
		   }
	break;
	
	case ARRIVAL:
		   {
  		    tw_rand_reverse_unif(lp->rng);
		    tw_rand_reverse_unif(lp->rng);
		    int next_dim = msg->source_dim;
		    int next_dir = msg->source_direction;

		    s->next_credit_available_time[next_dir + ( next_dim * 2 )][0] = msg->saved_available_time;
		    if(bf->c2)
		    {
1062 1063 1064 1065 1066
		       struct mn_stats* stat;
		       stat = model_net_find_stats(msg->category, s->torus_stats_array);
		       stat->recv_count--;
		       stat->recv_bytes -= msg->packet_size;
		        stat->recv_time -= tw_now(lp) - msg->travel_start_time;	    
1067 1068 1069 1070
		       N_finished_packets--;
		       total_time -= tw_now( lp ) - msg->travel_start_time;
		       total_hops -= msg->my_N_hop;
		    }
1071
 		    msg->my_N_hop--;
1072 1073 1074
                    if (lp->gid == msg->dest_lp && 
                            msg->chunk_id == num_chunks-1 &&
                            msg->remote_event_size_bytes && msg->is_pull){
1075
                        int net_id = model_net_get_id(LP_METHOD_NM);
1076 1077
                        model_net_event_rc(net_id, lp, msg->pull_size);
                    }
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098
		   }
	break;	

	case SEND:
		 {
		    if(bf->c2)
		     {
                        int next_dim = msg->saved_src_dim;
			int next_dir = msg->saved_src_dir;
			s->next_link_available_time[next_dir + ( next_dim * 2 )][0] = msg->saved_available_time;
			s->buffer[ next_dir + ( next_dim * 2 ) ][ 0 ] --;
	                tw_rand_reverse_unif(lp->rng);
		    }
		 }
	break;

       case CREDIT:
		{
		  s->buffer[ msg->source_direction + ( msg->source_dim * 2 ) ][  0 ]++;
              }
       break;
1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
	
       case T_COLLECTIVE_INIT:
                {
                    s->collective_init_time = msg->saved_collective_init_time;
                }
        break;

        case T_COLLECTIVE_FAN_IN:
                {
                   int i;
                   s->num_fan_nodes--;
                   if(bf->c1)
                    {
                        s->num_fan_nodes = msg->saved_fan_nodes;
                    }
                   if(bf->c2)
                     {
                        s->num_fan_nodes = msg->saved_fan_nodes;
                        for( i = 0; i < s->num_children; i++ )
                            tw_rand_reverse_unif(lp->rng);
                     }
                }
        break;

        case T_COLLECTIVE_FAN_OUT:
                {
                 int i;
                 if(bf->c1)
                    {
                        for( i = 0; i < s->num_children; i++ )
                            tw_rand_reverse_unif(lp->rng);
                    }
                }
        break;      
1133 1134 1135
     }
}

1136
/* forward event handler for torus node event */
1137 1138 1139 1140 1141 1142 1143 1144
static void event_handler(nodes_state * s, tw_bf * bf, nodes_message * msg, tw_lp * lp)
{
 *(int *) bf = (int) 0;
 switch(msg->type)
 {
  case GENERATE:
    packet_generate(s,bf,msg,lp);
  break;
1145

1146 1147 1148
  case ARRIVAL:
    packet_arrive(s,bf,msg,lp);
  break;
1149

1150 1151 1152
  case SEND:
   packet_send(s,bf,msg,lp);
  break;
1153

1154 1155 1156
  case CREDIT:
    packet_buffer_process(s,bf,msg,lp);
   break;
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169

  case T_COLLECTIVE_INIT:
    node_collective_init(s, bf, msg, lp);
  break;

  case T_COLLECTIVE_FAN_IN:
    node_collective_fan_in(s, bf, msg, lp);
  break;

  case T_COLLECTIVE_FAN_OUT:
    node_collective_fan_out(s, bf, msg, lp);
  break;
 
1170
  default:
1171
	printf("\n Being sent to wrong LP %d", msg->type);
1172 1173 1174
  break;
 }
}
1175
/* event types */
1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
tw_lptype torus_lp =
{
  (init_f) torus_init,
  (event_f) event_handler,
  (revent_f) node_rc_handler,
  (final_f) final,
  (map_f) codes_mapping,
  sizeof(nodes_state),
};

1186
/* returns the torus lp type for lp registration */
1187 1188 1189 1190 1191
static const tw_lptype* torus_get_lp_type(void)
{
   return(&torus_lp); 
}

1192 1193 1194 1195
static tw_lpid torus_find_local_device(tw_lp *sender)
{
     tw_lpid dest_id;

1196 1197 1198 1199 1200
     //TODO: be annotation-aware
     codes_mapping_get_lp_info(sender->gid, grp_name, &mapping_grp_id, NULL,
             &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
     codes_mapping_get_lp_id(grp_name, LP_CONFIG_NM, NULL, 1, mapping_rep_id,
             mapping_offset, &dest_id);
1201 1202 1203 1204

    return(dest_id);
}

1205 1206 1207 1208 1209 1210 1211 1212 1213 1214
/* data structure for torus statistics */
struct model_net_method torus_method =
{
   .mn_setup = torus_setup,
   .model_net_method_packet_event = torus_packet_event,
   .model_net_method_packet_event_rc = torus_packet_event_rc,
   .mn_get_lp_type = torus_get_lp_type,
   .mn_get_msg_sz = torus_get_msg_sz,
   .mn_report_stats = torus_report_stats,
   .model_net_method_find_local_device = torus_find_local_device,
1215 1216
   .mn_collective_call = torus_collective,
   .mn_collective_call_rc = torus_collective_rc
1217
};
Philip Carns's avatar
Philip Carns committed
1218 1219 1220 1221 1222 1223 1224 1225 1226

/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ts=8 sts=4 sw=4 expandtab
 */