dragonfly.c 78.3 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
// Local router ID: 0 --- total_router-1
// Router LP ID 
// Terminal LP ID

11 12
#include <ross.h>

13
#include "codes/jenkins-hash.h"
14 15 16 17
#include "codes/codes_mapping.h"
#include "codes/codes.h"
#include "codes/model-net.h"
#include "codes/model-net-method.h"
18 19
#include "codes/model-net-lp.h"
#include "codes/net/dragonfly.h"
20
#include "sys/file.h"
21 22 23 24

#define CREDIT_SIZE 8
#define MEAN_PROCESS 1.0

25 26 27
/* collective specific parameters */
#define TREE_DEGREE 4
#define LEVEL_DELAY 1000
28
#define DRAGONFLY_COLLECTIVE_DEBUG 0
29 30 31
#define NUM_COLLECTIVES  1
#define COLLECTIVE_COMPUTATION_DELAY 5700
#define DRAGONFLY_FAN_OUT_DELAY 20.0
32
#define WINDOW_LENGTH 0
33

34
// debugging parameters
35
#define TRACK -1
36
#define PRINT_ROUTER_TABLE 1
37
#define DEBUG 0
38
#define USE_DIRECT_SCHEME 1
39

40 41 42
#define LP_CONFIG_NM (model_net_lp_config_names[DRAGONFLY])
#define LP_METHOD_NM (model_net_method_names[DRAGONFLY])

43
long term_ecount, router_ecount, term_rev_ecount, router_rev_ecount;
44

45 46
static double maxd(double a, double b) { return a < b ? b : a; }

47
/* minimal and non-minimal packet counts for adaptive routing*/
48
static unsigned int minimal_count=0, nonmin_count=0, completed_packets = 0;
49

50 51 52 53 54 55
typedef struct dragonfly_param dragonfly_param;
/* annotation-specific parameters (unannotated entry occurs at the 
 * last index) */
static uint64_t                  num_params = 0;
static dragonfly_param         * all_params = NULL;
static const config_anno_map_t * anno_map   = NULL;
56 57

/* global variables for codes mapping */
58
static char lp_group_name[MAX_NAME_LENGTH];
59 60
static int mapping_grp_id, mapping_type_id, mapping_rep_id, mapping_offset;

61 62 63 64 65 66
/* router magic number */
int router_magic_num = 0;

/* terminal magic number */
int terminal_magic_num = 0;

67 68 69 70 71 72 73
typedef struct terminal_message_list terminal_message_list;
struct terminal_message_list {
    terminal_message msg;
    char* event_data;
    terminal_message_list *next;
    terminal_message_list *prev;
};
74

75 76 77 78 79 80 81
void init_terminal_message_list(terminal_message_list *this, 
    terminal_message *inmsg) {
    this->msg = *inmsg;
    this->event_data = NULL;
    this->next = NULL;
    this->prev = NULL;
}
82

83 84 85 86
void delete_terminal_message_list(terminal_message_list *this) {
    if(this->event_data != NULL) free(this->event_data);
    free(this);
}
87

88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
struct dragonfly_param
{
    // configuration parameters
    int num_routers; /*Number of routers in a group*/
    double local_bandwidth;/* bandwidth of the router-router channels within a group */
    double global_bandwidth;/* bandwidth of the inter-group router connections */
    double cn_bandwidth;/* bandwidth of the compute node channels connected to routers */
    int num_vcs; /* number of virtual channels */
    int local_vc_size; /* buffer size of the router-router channels */
    int global_vc_size; /* buffer size of the global channels */
    int cn_vc_size; /* buffer size of the compute node channels */
    int chunk_size; /* full-sized packets are broken into smaller chunks.*/
    // derived parameters
    int num_cn;
    int num_groups;
    int radix;
    int total_routers;
105
    int total_terminals;
106
    int num_global_channels;
107 108 109 110
    double cn_delay;
    double local_delay;
    double global_delay;
    double credit_delay;
111 112
};

113 114 115 116 117 118 119 120 121 122 123
/* handles terminal and router events like packet generate/send/receive/buffer */
typedef enum event_t event_t;
typedef struct terminal_state terminal_state;
typedef struct router_state router_state;

/* dragonfly compute node data structure */
struct terminal_state
{
   unsigned long long packet_counter;

   // Dragonfly specific parameters
124 125
   unsigned int router_id;
   unsigned int terminal_id;
126 127 128

   // Each terminal will have an input and output channel with the router
   int* vc_occupancy; // NUM_VC
129
   int num_vcs;
130 131
   tw_stime terminal_available_time;
   tw_stime next_credit_available_time;
132 133 134
   terminal_message_list **terminal_msgs;
   terminal_message_list **terminal_msgs_tail;
   int in_send_loop;
135 136 137 138
// Terminal generate, sends and arrival T_SEND, T_ARRIVAL, T_GENERATE
// Router-Router Intra-group sends and receives RR_LSEND, RR_LARRIVE
// Router-Router Inter-group sends and receives RR_GSEND, RR_GARRIVE
   struct mn_stats dragonfly_stats_array[CATEGORY_MAX];
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
  /* 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;
163 164 165

   const char * anno;
   const dragonfly_param *params;
166
};
167

168 169 170 171 172
/* terminal event type (1-4) */
enum event_t
{
  T_GENERATE=1,
  T_ARRIVE,
173
  T_SEND,
174
  T_BUFFER,
175 176
  R_SEND,
  R_ARRIVE,
177 178 179 180
  R_BUFFER,
  D_COLLECTIVE_INIT,
  D_COLLECTIVE_FAN_IN,
  D_COLLECTIVE_FAN_OUT
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
};
/* status of a virtual channel can be idle, active, allocated or wait for credit */
enum vc_status
{
   VC_IDLE,
   VC_ACTIVE,
   VC_ALLOC,
   VC_CREDIT
};

/* whether the last hop of a packet was global, local or a terminal */
enum last_hop
{
   GLOBAL,
   LOCAL,
   TERMINAL
};

/* three forms of routing algorithms available, adaptive routing is not
 * accurate and fully functional in the current version as the formulas
 * for detecting load on global channels are not very accurate */
enum ROUTING_ALGO
{
204 205
    MINIMAL = 0,
    NON_MINIMAL,
206 207
    ADAPTIVE,
    PROG_ADAPTIVE
208 209 210 211 212 213
};

struct router_state
{
   unsigned int router_id;
   unsigned int group_id;
214 215
  
   int* global_channel; 
216
   
217 218
   tw_stime* next_output_available_time;
   tw_stime* next_credit_available_time;
219
   tw_stime* cur_hist_start_time;
220 221 222 223 224
   terminal_message_list ***pending_msgs;
   terminal_message_list ***pending_msgs_tail;
   terminal_message_list ***queued_msgs;
   terminal_message_list ***queued_msgs_tail;
   int *in_send_loop;
225
   
226 227
   int** vc_occupancy;
   int* link_traffic;
228 229 230

   const char * anno;
   const dragonfly_param *params;
231 232 233

   int* prev_hist_num;
   int* cur_hist_num;
234 235 236 237 238 239
};

static short routing = MINIMAL;

static tw_stime         dragonfly_total_time = 0;
static tw_stime         dragonfly_max_latency = 0;
240
static tw_stime         max_collective = 0;
241 242 243 244 245


static long long       total_hops = 0;
static long long       N_finished_packets = 0;

246 247 248 249 250 251 252 253 254 255 256 257 258 259
/* convert GiB/s and bytes to ns */
static tw_stime bytes_to_ns(uint64_t bytes, double GB_p_s)
{
    tw_stime time;

    /* bytes to GB */
    time = ((double)bytes)/(1024.0*1024.0*1024.0);
    /* MB to s */
    time = time / GB_p_s;
    /* s to ns */
    time = time * 1000.0 * 1000.0 * 1000.0;

    return(time);
}
260

261 262
/* returns the dragonfly message size */
static int dragonfly_get_msg_sz(void)
263
{
264 265
	   return sizeof(terminal_message);
}
266

267 268 269 270 271 272 273 274 275 276 277 278
static void append_to_terminal_message_list(  
        terminal_message_list ** thisq,
        terminal_message_list ** thistail,
        int index, 
        terminal_message_list *msg) {
    if(thisq[index] == NULL) {
        thisq[index] = msg;
    } else {
        thistail[index]->next = msg;
        msg->prev = thistail[index];
    } 
    thistail[index] = msg;
279 280
}

281 282 283 284 285 286 287 288 289 290 291 292 293
static void prepend_to_terminal_message_list(  
        terminal_message_list ** thisq,
        terminal_message_list ** thistail,
        int index, 
        terminal_message_list *msg) {
    if(thisq[index] == NULL) {
        thistail[index] = msg;
    } else {
        thisq[index]->prev = msg;
        msg->next = thisq[index];
    } 
    thisq[index] = msg;
}
294

295 296 297 298 299 300 301 302 303 304
static void create_prepend_to_terminal_message_list(
        terminal_message_list ** thisq,
        terminal_message_list ** thistail,
        int index, 
        terminal_message *msg) {
    terminal_message_list* new_entry = (terminal_message_list*)malloc(
        sizeof(terminal_message_list));
    init_terminal_message_list(new_entry, msg);
    if(msg->remote_event_size_bytes) {
        void *m_data = model_net_method_get_edata(DRAGONFLY, msg);
305 306 307
        size_t s = msg->remote_event_size_bytes + msg->local_event_size_bytes;
        new_entry->event_data = (void*)malloc(s);
        memcpy(new_entry->event_data, m_data, s);
308
    }
309
    prepend_to_terminal_message_list( thisq, thistail, index, new_entry);
310 311
}

312 313 314 315 316 317 318 319 320 321 322 323 324 325 326
static terminal_message_list* return_head(
        terminal_message_list ** thisq,
        terminal_message_list ** thistail,
        int index) {
    terminal_message_list *head = thisq[index];
    if(head != NULL) {
        thisq[index] = head->next;
        if(head->next != NULL) {
            head->next->prev = NULL;
            head->next = NULL;
        } else {
            thistail[index] = NULL;
        }
    }
    return head;
327 328
}

329 330 331 332 333 334 335 336 337 338 339 340 341 342
static terminal_message_list* return_tail(
        terminal_message_list ** thisq,
        terminal_message_list ** thistail,
        int index) {
    terminal_message_list *tail = thistail[index];
    if(tail->prev != NULL) {
        tail->prev->next = NULL;
        thistail[index] = tail->prev;
        tail->prev = NULL;
    } else {
        thistail[index] = NULL;
        thisq[index] = NULL;
    }
    return tail;
343 344
}

345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383
static void copy_terminal_list_entry( terminal_message_list *cur_entry,
    terminal_message *msg) {
    terminal_message *cur_msg = &cur_entry->msg;
    msg->travel_start_time = cur_msg->travel_start_time;
    msg->packet_ID = cur_msg->packet_ID;    
    strcpy(msg->category, cur_msg->category);
    msg->final_dest_gid = cur_msg->final_dest_gid;
    msg->sender_lp = cur_msg->sender_lp;
    msg->dest_terminal_id = cur_msg->dest_terminal_id;
    msg->src_terminal_id = cur_msg->src_terminal_id;
    msg->local_id = cur_msg->local_id;
    msg->origin_router_id = cur_msg->origin_router_id;
    msg->my_N_hop = cur_msg->my_N_hop;
    msg->my_l_hop = cur_msg->my_l_hop;
    msg->my_g_hop = cur_msg->my_g_hop;
    msg->intm_lp_id = cur_msg->intm_lp_id;
    msg->saved_channel = cur_msg->saved_channel;
    msg->saved_vc = cur_msg->saved_vc;
    msg->last_hop = cur_msg->last_hop;
    msg->path_type = cur_msg->path_type;
    msg->vc_index = cur_msg->vc_index;
    msg->output_chan = cur_msg->output_chan;
    msg->is_pull = cur_msg->is_pull;
    msg->pull_size = cur_msg->pull_size;
    msg->intm_group_id = cur_msg->intm_group_id;
    msg->chunk_id = cur_msg->chunk_id;
    msg->packet_size = cur_msg->packet_size;
    msg->local_event_size_bytes = cur_msg->local_event_size_bytes;
    msg->remote_event_size_bytes = cur_msg->remote_event_size_bytes;
    msg->sender_node = cur_msg->sender_node;
    msg->next_stop = cur_msg->next_stop;
    msg->magic = cur_msg->magic;

    if(msg->local_event_size_bytes +  msg->remote_event_size_bytes > 0) {
        void *m_data = model_net_method_get_edata(DRAGONFLY, msg);
        memcpy(m_data, cur_entry->event_data, 
            msg->local_event_size_bytes +  msg->remote_event_size_bytes);
    }
}
384 385 386
static void dragonfly_read_config(const char * anno, dragonfly_param *params){
    // shorthand
    dragonfly_param *p = params;
387

388 389 390 391 392 393 394 395
    configuration_get_value_int(&config, "PARAMS", "num_routers", anno,
            &p->num_routers);
    if(p->num_routers <= 0) {
        p->num_routers = 4;
        fprintf(stderr, "Number of dimensions not specified, setting to %d\n",
                p->num_routers);
    }

396
    /*configuration_get_value_int(&config, "PARAMS", "num_vcs", anno,
397
            &p->num_vcs);
398
    if(p->num_vcs <= 0) {
399 400
        p->num_vcs = 1;
        fprintf(stderr, "Number of virtual channels not specified, setting to %d\n", p->num_vcs);
401 402 403
    }*/
    
    p->num_vcs = 3;
404 405

    configuration_get_value_int(&config, "PARAMS", "local_vc_size", anno, &p->local_vc_size);
406
    if(!p->local_vc_size) {
407 408 409 410 411
        p->local_vc_size = 1024;
        fprintf(stderr, "Buffer size of local channels not specified, setting to %d\n", p->local_vc_size);
    }

    configuration_get_value_int(&config, "PARAMS", "global_vc_size", anno, &p->global_vc_size);
412
    if(!p->global_vc_size) {
413 414 415 416 417
        p->global_vc_size = 2048;
        fprintf(stderr, "Buffer size of global channels not specified, setting to %d\n", p->global_vc_size);
    }

    configuration_get_value_int(&config, "PARAMS", "cn_vc_size", anno, &p->cn_vc_size);
418
    if(!p->cn_vc_size) {
419 420 421 422 423
        p->cn_vc_size = 1024;
        fprintf(stderr, "Buffer size of compute node channels not specified, setting to %d\n", p->cn_vc_size);
    }

    configuration_get_value_int(&config, "PARAMS", "chunk_size", anno, &p->chunk_size);
424
    if(!p->chunk_size) {
425
        p->chunk_size = 64;
426
        fprintf(stderr, "Chunk size for packets is specified, setting to %d\n", p->chunk_size);
427 428 429
    }

    configuration_get_value_double(&config, "PARAMS", "local_bandwidth", anno, &p->local_bandwidth);
430
    if(!p->local_bandwidth) {
431 432 433 434 435
        p->local_bandwidth = 5.25;
        fprintf(stderr, "Bandwidth of local channels not specified, setting to %lf\n", p->local_bandwidth);
    }

    configuration_get_value_double(&config, "PARAMS", "global_bandwidth", anno, &p->global_bandwidth);
436
    if(!p->global_bandwidth) {
437 438 439 440 441
        p->global_bandwidth = 4.7;
        fprintf(stderr, "Bandwidth of global channels not specified, setting to %lf\n", p->global_bandwidth);
    }

    configuration_get_value_double(&config, "PARAMS", "cn_bandwidth", anno, &p->cn_bandwidth);
442
    if(!p->cn_bandwidth) {
443 444 445 446
        p->cn_bandwidth = 5.25;
        fprintf(stderr, "Bandwidth of compute node channels not specified, setting to %lf\n", p->cn_bandwidth);
    }

447 448
    char routing_str[MAX_NAME_LENGTH];
    configuration_get_value(&config, "PARAMS", "routing", anno, routing_str,
449
            MAX_NAME_LENGTH);
450 451
    if(strcmp(routing_str, "minimal") == 0)
        routing = MINIMAL;
452 453
    else if(strcmp(routing_str, "nonminimal")==0 || 
            strcmp(routing_str,"non-minimal")==0)
454 455 456 457 458
        routing = NON_MINIMAL;
    else if (strcmp(routing_str, "adaptive") == 0)
        routing = ADAPTIVE;
    else if (strcmp(routing_str, "prog-adaptive") == 0)
	routing = PROG_ADAPTIVE;
459 460 461 462
    else
    {
        fprintf(stderr, 
                "No routing protocol specified, setting to minimal routing\n");
463
        routing = -1;
464 465 466 467 468 469
    }

    // set the derived parameters
    p->num_cn = p->num_routers/2;
    p->num_global_channels = p->num_routers/2;
    p->num_groups = p->num_routers * p->num_cn + 1;
470
    p->radix = (p->num_cn + p->num_global_channels + p->num_routers);
471
    p->total_routers = p->num_groups * p->num_routers;
472
    p->total_terminals = p->total_routers * p->num_cn;
473 474 475 476 477 478 479
    int rank;
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    if(!rank) {
        printf("\n Total nodes %d routers %d groups %d radix %d \n",
                p->num_cn * p->total_routers, p->total_routers, p->num_groups,
                p->radix);
    }
480
    
481 482 483 484
    p->cn_delay = (1.0 / p->cn_bandwidth) * p->chunk_size;
    p->local_delay = (1.0 / p->local_bandwidth) * p->chunk_size;
    p->global_delay = (1.0 / p->global_bandwidth) * p->chunk_size;
    p->credit_delay = (1.0 / p->local_bandwidth) * 8; //assume 8 bytes packet
485 486 487

}

488 489 490 491
static void dragonfly_configure(){
    anno_map = codes_mapping_get_lp_anno_map(LP_CONFIG_NM);
    assert(anno_map);
    num_params = anno_map->num_annos + (anno_map->has_unanno_lp > 0);
492
    all_params = malloc(num_params * sizeof(*all_params));
493 494

    for (uint64_t i = 0; i < anno_map->num_annos; i++){
495
        const char * anno = anno_map->annotations[i].ptr;
496 497 498 499 500
        dragonfly_read_config(anno, &all_params[i]);
    }
    if (anno_map->has_unanno_lp > 0){
        dragonfly_read_config(NULL, &all_params[anno_map->num_annos]);
    }
501 502 503 504 505 506 507
}

/* report dragonfly statistics like average and maximum packet latency, average number of hops traversed */
static void dragonfly_report_stats()
{
   long long avg_hops, total_finished_packets;
   tw_stime avg_time, max_time;
508
   int total_minimal_packets, total_nonmin_packets, total_completed_packets;
509 510 511 512 513

   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( &dragonfly_total_time, &avg_time, 1,MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD);
   MPI_Reduce( &dragonfly_max_latency, &max_time, 1, MPI_DOUBLE, MPI_MAX, 0, MPI_COMM_WORLD);
514
   if(routing == ADAPTIVE || routing == PROG_ADAPTIVE)
515 516 517
    {
	MPI_Reduce(&minimal_count, &total_minimal_packets, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
 	MPI_Reduce(&nonmin_count, &total_nonmin_packets, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
518
 	MPI_Reduce(&completed_packets, &total_completed_packets, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
519
    }
520

521 522
   /* print statistics */
   if(!g_tw_mynode)
523
   {	
524
      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);
525
     if(routing == ADAPTIVE || routing == PROG_ADAPTIVE)
526
              printf("\n ADAPTIVE ROUTING STATS: %d percent packets routed minimally %d percent packets routed non-minimally completed packets %d ", total_minimal_packets, total_nonmin_packets, total_completed_packets);
527 528
 
  }
529 530
   return;
}
531

532 533 534
void dragonfly_collective_init(terminal_state * s,
           		   tw_lp * lp)
{
535 536 537 538 539
    // TODO: be annotation-aware
    codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id, NULL,
            &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
    int num_lps = codes_mapping_get_lp_count(lp_group_name, 1, LP_CONFIG_NM,
            NULL, 1);
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589
    int num_reps = codes_mapping_get_group_reps(lp_group_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 DRAGONFLY_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
}

590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647
/* initialize a dragonfly compute node terminal */
void 
terminal_init( terminal_state * s, 
	       tw_lp * lp )
{
    uint32_t h1 = 0, h2 = 0; 
    bj_hashlittle2(LP_METHOD_NM, strlen(LP_METHOD_NM), &h1, &h2);
    terminal_magic_num = h1 + h2;
    
    int i;
    char anno[MAX_NAME_LENGTH];

    // Assign the global router ID
    // TODO: be annotation-aware
    codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id, NULL,
            &mapping_type_id, anno, &mapping_rep_id, &mapping_offset);
    if (anno[0] == '\0'){
        s->anno = NULL;
        s->params = &all_params[num_params-1];
    }
    else{
        s->anno = strdup(anno);
        int id = configuration_get_annotation_index(anno, anno_map);
        s->params = &all_params[id];
    }

   int num_lps = codes_mapping_get_lp_count(lp_group_name, 1, LP_CONFIG_NM,
           s->anno, 0);

   s->terminal_id = (mapping_rep_id * num_lps) + mapping_offset;  
   s->router_id=(int)s->terminal_id / (s->params->num_routers/2);
   s->terminal_available_time = 0.0;
   s->packet_counter = 0;

   s->num_vcs = 1;
   s->vc_occupancy = (int*)malloc(s->num_vcs * sizeof(int));

   for( i = 0; i < s->num_vcs; i++ )
    {
      s->vc_occupancy[i]=0;
    }

   s->terminal_msgs = 
       (terminal_message_list**)malloc(1*sizeof(terminal_message_list*));
   s->terminal_msgs_tail = 
       (terminal_message_list**)malloc(1*sizeof(terminal_message_list*));
   s->terminal_msgs[0] = NULL;
   s->terminal_msgs_tail[0] = NULL;
   s->in_send_loop = 0;

   dragonfly_collective_init(s, lp);
   return;
}


/* sets up the router virtual channels, global channels, 
 * local channels, compute node channels */
void router_setup(router_state * r, tw_lp * lp)
648
{
649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690
    uint32_t h1 = 0, h2 = 0; 
    bj_hashlittle2(LP_METHOD_NM, strlen(LP_METHOD_NM), &h1, &h2);
    router_magic_num = h1 + h2;
    
    char anno[MAX_NAME_LENGTH];
    codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id, NULL,
            &mapping_type_id, anno, &mapping_rep_id, &mapping_offset);

    if (anno[0] == '\0'){
        r->anno = NULL;
        r->params = &all_params[num_params-1];
    } else{
        r->anno = strdup(anno);
        int id = configuration_get_annotation_index(anno, anno_map);
        r->params = &all_params[id];
    }

    // shorthand
    const dragonfly_param *p = r->params;

   r->router_id=mapping_rep_id + mapping_offset;
   r->group_id=r->router_id/p->num_routers;

   r->global_channel = (int*)malloc(p->num_global_channels * sizeof(int));
   r->next_output_available_time = (tw_stime*)malloc(p->radix * sizeof(tw_stime));
   r->next_credit_available_time = (tw_stime*)malloc(p->radix * sizeof(tw_stime));
   r->cur_hist_start_time = (tw_stime*)malloc(p->radix * sizeof(tw_stime));
   r->link_traffic = (int*)malloc(p->radix * sizeof(int));
   r->cur_hist_num = (int*)malloc(p->radix * sizeof(int));
   r->prev_hist_num = (int*)malloc(p->radix * sizeof(int));
   
   r->vc_occupancy = (int**)malloc(p->radix * sizeof(int*));
   r->in_send_loop = (int*)malloc(p->radix * sizeof(int));
   r->pending_msgs = 
    (terminal_message_list***)malloc(p->radix * sizeof(terminal_message_list**));
   r->pending_msgs_tail = 
    (terminal_message_list***)malloc(p->radix * sizeof(terminal_message_list**));
   r->queued_msgs = 
    (terminal_message_list***)malloc(p->radix * sizeof(terminal_message_list**));
   r->queued_msgs_tail = 
    (terminal_message_list***)malloc(p->radix * sizeof(terminal_message_list**));
  
691
   for(int i=0; i < p->radix; i++)
692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710
    {
       // Set credit & router occupancy
	r->next_output_available_time[i]=0;
        r->next_credit_available_time[i]=0;
	r->cur_hist_start_time[i] = 0;
        r->link_traffic[i]=0;
	r->cur_hist_num[i] = 0;
	r->prev_hist_num[i] = 0;
        
        r->in_send_loop[i] = 0;
        r->vc_occupancy[i] = (int*)malloc(p->num_vcs * sizeof(int));
        r->pending_msgs[i] = (terminal_message_list**)malloc(p->num_vcs * 
            sizeof(terminal_message_list*));
        r->pending_msgs_tail[i] = (terminal_message_list**)malloc(p->num_vcs * 
            sizeof(terminal_message_list*));
        r->queued_msgs[i] = (terminal_message_list**)malloc(p->num_vcs * 
            sizeof(terminal_message_list*));
        r->queued_msgs_tail[i] = (terminal_message_list**)malloc(p->num_vcs * 
            sizeof(terminal_message_list*));
711
        for(int j = 0; j < p->num_vcs; j++) {
712 713 714 715 716 717 718 719 720 721 722 723 724 725
            r->vc_occupancy[i][j] = 0;
            r->pending_msgs[i][j] = NULL;
            r->pending_msgs_tail[i][j] = NULL;
            r->queued_msgs[i][j] = NULL;
            r->queued_msgs_tail[i][j] = NULL;
        }
    }

#if DEBUG == 1
   printf("\n LP ID %d VC occupancy radix %d Router %d is connected to ", lp->gid, p->radix, r->router_id);
#endif 
   //round the number of global channels to the nearest even number
#if USE_DIRECT_SCHEME
       int first = r->router_id % p->num_routers;
726
       for(int i=0; i < p->num_global_channels; i++)
727 728 729 730 731 732 733 734 735 736 737 738 739
        {
            int target_grp = first;
            if(target_grp == r->group_id) {
                target_grp = p->num_groups - 1;
            }
            int my_pos = r->group_id % p->num_routers;
            if(r->group_id == p->num_groups - 1) {
                my_pos = target_grp % p->num_routers;
            }
            r->global_channel[i] = target_grp * p->num_routers + my_pos;
            first += p->num_routers;
        }
#else
740 741 742
   int router_offset = (r->router_id % p->num_routers) * 
    (p->num_global_channels / 2) + 1;
   for(int i=0; i < p->num_global_channels; i++)
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776
    {
      if(i % 2 != 0)
          {
             r->global_channel[i]=(r->router_id + (router_offset * p->num_routers))%p->total_routers;
             router_offset++;
          }
          else
           {
             r->global_channel[i]=r->router_id - ((router_offset) * p->num_routers);
           }
        if(r->global_channel[i]<0)
         {
           r->global_channel[i]=p->total_routers+r->global_channel[i]; 
	 }
#if DEBUG == 1
    printf("\n channel %d ", r->global_channel[i]);
#endif 
    }
#endif

#if DEBUG == 1
   printf("\n");
#endif
   return;
}	


/* dragonfly packet event , generates a dragonfly packet on the compute node */
static tw_stime dragonfly_packet_event(const char* category, 
    tw_lpid final_dest_lp, tw_lpid dest_mn_lp, 
    uint64_t packet_size, int is_pull, 
    uint64_t pull_size, tw_stime offset, const mn_sched_params *sched_params, 
    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) {
777 778 779 780 781
    tw_event * e_new;
    tw_stime xfer_to_nic_time;
    terminal_message * msg;
    char* tmp_ptr;

782 783 784 785
    xfer_to_nic_time = codes_local_latency(sender); 
    //printf("\n transfer in time %f %f ", xfer_to_nic_time+offset, tw_now(sender));
    //e_new = tw_event_new(sender->gid, xfer_to_nic_time+offset, sender);
    //msg = tw_event_data(e_new);
786 787
    e_new = model_net_method_event_new(sender->gid, xfer_to_nic_time+offset,
            sender, DRAGONFLY, (void**)&msg, (void**)&tmp_ptr);
788 789
    strcpy(msg->category, category);
    msg->final_dest_gid = final_dest_lp;
790
    msg->sender_lp=src_lp;
791 792 793 794
    msg->packet_size = packet_size;
    msg->remote_event_size_bytes = 0;
    msg->local_event_size_bytes = 0;
    msg->type = T_GENERATE;
795 796
    msg->is_pull = is_pull;
    msg->pull_size = pull_size;
797
    msg->magic = terminal_magic_num;
798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813

    if(is_last_pckt) /* Its the last packet so pass in remote and local 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;
	}
     }
814
	   //printf("\n dragonfly 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);
815
    tw_event_send(e_new);
816
    return xfer_to_nic_time;
817 818 819 820 821 822 823 824 825
}

/* dragonfly packet event reverse handler */
static void dragonfly_packet_event_rc(tw_lp *sender)
{
	  codes_local_latency_reverse(sender);
	    return;
}

826 827 828
/* given two group IDs, find the router of the src_gid that connects to the dest_gid*/
tw_lpid getRouterFromGroupID(int dest_gid, 
		    int src_gid,
829 830
		    int num_routers,
                    int total_groups)
831
{
832 833 834 835 836 837 838
#if USE_DIRECT_SCHEME
  int dest = dest_gid;
  if(dest == total_groups - 1) {
      dest = src_gid;
  }
  return src_gid * num_routers + (dest % num_routers);
#else
839 840 841
  int group_begin = src_gid * num_routers;
  int group_end = (src_gid * num_routers) + num_routers-1;
  int offset = (dest_gid * num_routers - group_begin) / num_routers;
842
  
843 844
  if((dest_gid * num_routers) < group_begin)
    offset = (group_begin - dest_gid * num_routers) / num_routers; // take absolute value
845
  
846 847
  int half_channel = num_routers / 4;
  int index = (offset - 1)/(half_channel * num_routers);
848
  
849
  offset=(offset - 1) % (half_channel * num_routers);
850 851 852 853 854 855 856 857 858 859

  // If the destination router is in the same group
  tw_lpid router_id;

  if(index % 2 != 0)
    router_id = group_end - (offset / half_channel); // start from the end
  else
    router_id = group_begin + (offset / half_channel);

  return router_id;
860
#endif
861 862 863
}	

/*When a packet is sent from the current router and a buffer slot becomes available, a credit is sent back to schedule another packet event*/
864 865
void router_credit_send(router_state * s, tw_bf * bf, terminal_message * msg, 
  tw_lp * lp, int sq) {
866 867 868 869
  tw_event * buf_e;
  tw_stime ts;
  terminal_message * buf_msg;

870
  int dest = 0,  type = R_BUFFER;
871
  int is_terminal = 0;
872

873
  const dragonfly_param *p = s->params;
874 875 876 877 878 879 880 881 882 883 884 885 886
 
  // Notify sender terminal about available buffer space
  if(msg->last_hop == TERMINAL) {
    dest = msg->src_terminal_id;
    type = T_BUFFER;
    is_terminal = 1;
  } else if(msg->last_hop == GLOBAL) {
    dest = msg->intm_lp_id;
  } else if(msg->last_hop == LOCAL) {
    dest = msg->intm_lp_id;
  } else
    printf("\n Invalid message type");

887
  ts = g_tw_lookahead + p->credit_delay +  tw_rand_unif(lp->rng);
888
	
889 890 891 892 893 894 895 896 897 898 899 900 901 902
  if (is_terminal) {
    buf_e = model_net_method_event_new(dest, ts, lp, DRAGONFLY, 
      (void**)&buf_msg, NULL);
    buf_msg->magic = terminal_magic_num;
  } else {
    buf_e = tw_event_new(dest, ts , lp);
    buf_msg = tw_event_data(buf_e);
    buf_msg->magic = router_magic_num;
  }
 
  if(sq == -1) {
    buf_msg->vc_index = msg->vc_index;
    buf_msg->output_chan = msg->output_chan;
  } else {
903
    buf_msg->vc_index = msg->saved_vc;
904 905 906 907
    buf_msg->output_chan = msg->saved_channel;
  }
  
  buf_msg->type = type;
908

909 910
  tw_event_send(buf_e);
  return;
911 912
}

913
void packet_generate_rc(terminal_state * s, tw_bf * bf, terminal_message * msg, tw_lp * lp)
914
{
915 916 917
   term_rev_ecount++;
   term_ecount--;

918 919
   tw_rand_reverse_unif(lp->rng);

920 921 922
   int num_chunks = msg->packet_size/s->params->chunk_size;
   if(msg->packet_size % s->params->chunk_size)
       num_chunks++;
923

924
   if(!num_chunks)
925
       num_chunks = 1;
926

927 928 929 930 931 932 933 934 935 936 937
   int i;
   for(i = 0; i < num_chunks; i++) {
        delete_terminal_message_list(return_tail(s->terminal_msgs, 
          s->terminal_msgs_tail, 0));
   }
    if(bf->c5) {
        tw_rand_reverse_unif(lp->rng);
        s->in_send_loop = 0;
    }
     struct mn_stats* stat;
     stat = model_net_find_stats(msg->category, s->dragonfly_stats_array);
938 939 940 941
     stat->send_count--;
     stat->send_bytes -= msg->packet_size;
     stat->send_time -= (1/s->params->cn_bandwidth) * msg->packet_size;
}
942

943
/* generates packet at the current dragonfly compute node */
944 945 946
void packet_generate(terminal_state * s, tw_bf * bf, terminal_message * msg, 
  tw_lp * lp) {
  term_ecount++;
947

948 949 950 951 952
  tw_stime ts;
  tw_lpid dest_terminal_id;
  dest_terminal_id = model_net_find_local_device(DRAGONFLY, s->anno, 0,
      msg->final_dest_gid);
  msg->dest_terminal_id = dest_terminal_id;
953

954
  const dragonfly_param *p = s->params;
955

956 957
  ts = g_tw_lookahead + s->params->cn_delay + tw_rand_unif(lp->rng);
  model_net_method_idle_event(ts, 0, lp);
958

959 960 961
  int i, total_event_size;
  int num_chunks = msg->packet_size / p->chunk_size;
  if (msg->packet_size % s->params->chunk_size) num_chunks++;
962 963 964 965

  if(!num_chunks)
    num_chunks = 1;

966 967 968 969 970 971
  msg->packet_ID = lp->gid + g_tw_nlp * s->packet_counter; 
  msg->travel_start_time = tw_now(lp);
  msg->my_N_hop = 0;
  msg->my_l_hop = 0;
  msg->my_g_hop = 0;
  msg->intm_group_id = -1;
972

973 974 975 976 977
  for(i = 0; i < num_chunks; i++)
  {
    terminal_message_list *cur_chunk = (terminal_message_list*)malloc(
      sizeof(terminal_message_list));
    init_terminal_message_list(cur_chunk, msg);
978

979 980 981 982 983 984 985 986 987 988 989 990 991 992
    if(msg->remote_event_size_bytes + msg->local_event_size_bytes > 0) {
      cur_chunk->event_data = (char*)malloc(
          msg->remote_event_size_bytes + msg->local_event_size_bytes);
    }
    
    void * m_data_src = model_net_method_get_edata(DRAGONFLY, msg);
    if (msg->remote_event_size_bytes){
      memcpy(cur_chunk->event_data, m_data_src, msg->remote_event_size_bytes);
    }
    if (msg->local_event_size_bytes){ 
      m_data_src = (char*)m_data_src + msg->remote_event_size_bytes;
      memcpy((char*)cur_chunk->event_data + msg->remote_event_size_bytes, 
          m_data_src, msg->local_event_size_bytes);
    }
993

994 995 996 997
    cur_chunk->msg.chunk_id = i;
    append_to_terminal_message_list(s->terminal_msgs, s->terminal_msgs_tail,
      0, cur_chunk);
  }
998

999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009
  if(s->in_send_loop == 0) {
    bf->c5 = 1;
    terminal_message *m;
    ts = g_tw_lookahead + s->params->cn_delay + tw_rand_unif(lp->rng);
    tw_event* e = model_net_method_event_new(lp->gid, ts, lp, DRAGONFLY, 
      (void**)&m, NULL);
    m->type = T_SEND;
    m->magic = terminal_magic_num;
    s->in_send_loop = 1;
    tw_event_send(e);
  }
1010

1011 1012 1013 1014 1015 1016 1017 1018
  total_event_size = model_net_get_msg_sz(DRAGONFLY) + 
      msg->remote_event_size_bytes + msg->local_event_size_bytes;
  mn_stats* stat;
  stat = model_net_find_stats(msg->category, s->dragonfly_stats_array);
  stat->send_count++;
  stat->send_bytes += msg->packet_size;
  stat->send_time += (1/p->cn_bandwidth) * msg->packet_size;
  if(stat->max_event_size < total_event_size)
1019
	  stat->max_event_size = total_event_size;
1020

1021 1022 1023
  return;
}

1024 1025
void packet_send_rc(terminal_state * s, tw_bf * bf, terminal_message * msg,
        tw_lp * lp)
1026
{
1027 1028
      term_ecount--;
      term_rev_ecount++;
1029

1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
      if(bf->c1) {
        s->in_send_loop = 1;
        return;
      }
      
      s->terminal_available_time = msg->saved_available_time;
      tw_rand_reverse_unif(lp->rng);
      if(bf->c2) {
        codes_local_latency_reverse(lp);
      }
     
      s->packet_counter--;
      s->vc_occupancy[0] -= s->params->chunk_size;
1043

1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
      create_prepend_to_terminal_message_list(s->terminal_msgs,
          s->terminal_msgs_tail, 0, msg);
      if(bf->c3) {
        tw_rand_reverse_unif(lp->rng);
      }
      if(bf->c4) {
        s->in_send_loop = 1;
      }
    return;
}
/* sends the packet from the current dragonfly compute node to the attached router */
void packet_send(terminal_state * s, tw_bf * bf, terminal_message * msg, 
  tw_lp * lp) {
  
  term_ecount++;
  tw_stime ts;
  tw_event *e;
  terminal_message *m;
  tw_lpid router_id;
1063

1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092
  terminal_message_list* cur_entry = s->terminal_msgs[0];

  if(s->vc_occupancy[0] + s->params->chunk_size > s->params->cn_vc_size 
      || cur_entry == NULL) {
    bf->c1 = 1;
    s->in_send_loop = 0;
    //printf("[%d] Skipping send %d %d\n", lp->gid, cur_entry == NULL, 
    //  (s->vc_occupancy[0] + s->params->chunk_size > s->params->cn_vc_size));
    return;
  }

  msg->saved_available_time = s->terminal_available_time;
  ts = g_tw_lookahead + s->params->cn_delay + tw_rand_unif(lp->rng);
  s->terminal_available_time = maxd(s->terminal_available_time, tw_now(lp));
  s->terminal_available_time += ts;

  //TODO: be annotation-aware
  codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id, NULL,
      &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
  codes_mapping_get_lp_id(lp_group_name, "dragonfly_router", NULL, 1,
      s->router_id, 0, &router_id);
  // we are sending an event to the router, so no method_event here
  e = tw_event_new(router_id, s->terminal_available_time - tw_now(lp), lp);
  m = tw_event_data(e);
  memcpy(m, &cur_entry->msg, sizeof(terminal_message));
  if (m->remote_event_size_bytes){
    memcpy(model_net_method_get_edata(DRAGONFLY, m), cur_entry->event_data,
        m->remote_event_size_bytes);
  }
1093

1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
  m->origin_router_id = s->router_id;
  m->type = R_ARRIVE;
  m->src_terminal_id = lp->gid;
  m->vc_index = 0;
  m->last_hop = TERMINAL;
  m->intm_group_id = -1;
  m->magic = router_magic_num;
  m->path_type = -1;
  m->local_event_size_bytes = 0;
  m->local_id = s->terminal_id;
  tw_event_send(e);

  int num_chunks = cur_entry->msg.packet_size/s->params->chunk_size;
  if(cur_entry->msg.packet_size % s->params->chunk_size)
    num_chunks++;

1110 1111 1112
  if(!num_chunks)
      num_chunks = 1;

1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
  if(cur_entry->msg.chunk_id == num_chunks - 1 && 
      (cur_entry->msg.local_event_size_bytes > 0)) {
    bf->c2 = 1;
    ts = codes_local_latency(lp); 
    tw_event *e_new = tw_event_new(cur_entry->msg.sender_lp, ts, lp);
    terminal_message* m_new = tw_event_data(e_new);
    void *local_event = (char*)cur_entry->event_data + 
      cur_entry->msg.remote_event_size_bytes;
    memcpy(m_new, local_event, cur_entry->msg.local_event_size_bytes);
    tw_event_send(e_new);
  }
  s->packet_counter++;
  s->vc_occupancy[0] += s->params->chunk_size;
  cur_entry = return_head(s->terminal_msgs, s->terminal_msgs_tail, 0); 
  copy_terminal_list_entry(cur_entry, msg);
  delete_terminal_message_list(cur_entry);

  cur_entry = s->terminal_msgs[0];
  
  if(cur_entry != NULL &&
    s->vc_occupancy[0] + s->params->chunk_size <= s->params->cn_vc_size) {
    bf->c3 = 1;
    terminal_message *m;
    ts = g_tw_lookahead + s->params->cn_delay + tw_rand_unif(lp->rng);
    tw_event* e = model_net_method_event_new(lp->gid, ts, lp, DRAGONFLY, 
      (void**)&m, NULL);
    m->type = T_SEND;
    m->magic = terminal_magic_num;
    tw_event_send(e);
  } else {
    bf->c4 = 1;
    s->in_send_loop = 0;
  }
  return;
1147
}
1148 1149

void packet_arrive_rc(terminal_state * s, tw_bf * bf, terminal_message * msg, tw_lp * lp)
1150
{
1151 1152
      term_ecount--;
      term_rev_ecount++;
1153

1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
      completed_packets--;
      if(msg->path_type == MINIMAL)
        minimal_count--;
      if(msg->path_type == NON_MINIMAL)
        nonmin_count--;

      if(bf->c2) {
        mn_stats* stat;
        stat = model_net_find_stats(msg->category, s->dragonfly_stats_array);
        stat->recv_count--;
        stat->recv_bytes -= msg->packet_size;
        stat->recv_time -= tw_now(lp) - msg->travel_start_time;
        N_finished_packets--;
        dragonfly_total_time -= (tw_now(lp) - msg->travel_start_time);
        total_hops -= msg->my_N_hop;
        if(bf->c3)
          dragonfly_max_latency = msg->saved_available_time;

        if(bf->c4)
        {
           int net_id = model_net_get_id(LP_METHOD_NM);
           model_net_event_rc(net_id, lp, msg->pull_size);
1176

1177 1178 1179 1180
        }
      }
      msg->my_N_hop--;
      tw_rand_reverse_unif(lp->rng);
1181

1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
      return;
}
/* packet arrives at the destination terminal */
void packet_arrive(terminal_state * s, tw_bf * bf, terminal_message * msg, 
  tw_lp * lp) {

  term_ecount++;

  bf->c2 = 0;
  bf->c3 = 0;
  bf->c4 = 0;
1193

1194 1195 1196
  int num_chunks = msg->packet_size / s->params->chunk_size;
  if (msg->packet_size % s->params->chunk_size)
    num_chunks++;
1197 1198
  if(!num_chunks)
      num_chunks = 1;
1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209

  completed_packets++;

  if(msg->path_type == MINIMAL)
    minimal_count++;

  if(msg->path_type == NON_MINIMAL)
    nonmin_count++;

  if(msg->path_type != MINIMAL && msg->path_type != NON_MINIMAL)
    printf("\n Wrong message path type %d ", msg->path_type);
1210
#if DEBUG == 1
1211 1212 1213 1214
  if( msg->packet_ID == TRACK && msg->chunk_id == num_chunks-1)
  {
    printf( "(%lf) [Terminal %d] packet %lld has arrived  \n",
        tw_now(lp), (int)lp->gid, msg->packet_ID);
1215

1216 1217
    printf("travel start time is %f\n",
        msg->travel_start_time);
1218

1219 1220
    printf("My hop now is %d\n",msg->my_N_hop);
  }
1221 1222 1223 1224
#endif

   tw_stime ts;

1225
   msg->my_N_hop++;
1226 1227
  if(msg->chunk_id == num_chunks-1)
  {
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242
    bf->c2 = 1;
    mn_stats* stat = model_net_find_stats(msg->category, s->dragonfly_stats_array);
    stat->recv_count++;
    stat->recv_bytes += msg->packet_size;
    stat->recv_time += tw_now(lp) - msg->travel_start_time;

    N_finished_packets++;
    dragonfly_total_time += tw_now( lp ) - msg->travel_start_time;
    total_hops += msg->my_N_hop;

    if (dragonfly_max_latency < tw_now( lp ) - msg->travel_start_time) {
      bf->c3 = 1;
      msg->saved_available_time = dragonfly_max_latency;
      dragonfly_max_latency = tw_now( lp ) - msg->travel_start_time;
    }
1243 1244
	if(msg->remote_event_size_bytes)
	{
1245
            void * tmp_ptr = model_net_method_get_edata(DRAGONFLY, msg);
1246
            ts = g_tw_lookahead + bytes_to_ns(msg->remote_event_size_bytes, (1/s->params->cn_bandwidth));
1247
            if (msg->is_pull){
1248
                bf->c4 = 0;
1249 1250 1251 1252
                struct codes_mctx mc_dst =
                    codes_mctx_set_global_direct(msg->sender_mn_lp);
                struct codes_mctx mc_src =
                    codes_mctx_set_global_direct(lp->gid);
1253
                int net_id = model_net_get_id(LP_METHOD_NM);
1254 1255 1256
                model_net_event_mctx(net_id, &mc_src, &mc_dst, msg->category,
                        msg->sender_lp, msg->pull_size, ts,
                        msg->remote_event_size_bytes, tmp_ptr, 0, NULL, lp);
1257 1258
            }
            else{
1259 1260 1261
                tw_event * e = tw_event_new(msg->final_dest_gid, ts, lp);
                void * m_remote = tw_event_data(e);
                memcpy(m_remote, tmp_ptr, msg->remote_event_size_bytes);
1262 1263
                tw_event_send(e); 
            }
1264 1265 1266
	}
  }

1267 1268
    // NIC aggregation - should this be a separate function?
    // Trigger an event on receiving server
1269

1270 1271
  ts = g_tw_lookahead + s->params->credit_delay + tw_rand_unif(lp->rng);
  
1272 1273
  if(msg->intm_lp_id == TRACK)
	printf("\n terminal sending credit at chan %d ", msg->saved_vc);
1274
  
1275 1276 1277 1278
  // no method_event here - message going to router
  tw_event * buf_e;
  terminal_message * buf_msg;
  buf_e = tw_event_new(msg->intm_lp_id, ts, lp);
1279
  buf_msg = tw_event_data(buf_e);
1280
  buf_msg->magic = router_magic_num;
1281 1282 1283
  buf_msg->vc_index = msg->vc_index;
  buf_msg->output_chan = msg->output_chan;
  buf_msg->type = R_BUFFER;
1284 1285 1286 1287 1288
  tw_event_send(buf_e);

  return;
}

1289
/* collective operation for the torus network */
1290
void dragonfly_collective(char const * category, int message_size, int remote_event_size, const void* remote_event, tw_lp* sender)
1291 1292 1293 1294 1295 1296 1297
{
    tw_event * e_new;
    tw_stime xfer_to_nic_time;
    terminal_message * msg;
    tw_lpid local_nic_id;
    char* tmp_ptr;

1298 1299 1300 1301
    codes_mapping_get_lp_info(sender->gid, lp_group_name, &mapping_grp_id,
            NULL, &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
    codes_mapping_get_lp_id(lp_group_name, LP_CONFIG_NM, NULL, 1,
            mapping_rep_id, mapping_offset, &local_nic_id);
1302

1303
    xfer_to_nic_time = codes_local_latency(sender);
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342
    e_new = model_net_method_event_new(local_nic_id, xfer_to_nic_time,
            sender, DRAGONFLY, (void**)&msg, (void**)&tmp_ptr);

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

    tmp_ptr = (char*)msg;
    tmp_ptr += dragonfly_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 dragonfly_collective_rc(int message_size, tw_lp* sender)
{
     codes_local_latency_reverse(sender);
     return;
}

static void send_remote_event(terminal_state * s,
                        tw_bf * bf,
                        terminal_message * msg,
                        tw_lp * lp)
{
    // Trigger an event on receiving server
    if(msg->remote_event_size_bytes)
     {
            tw_event* e;
            tw_stime ts;
            terminal_message * m;
1343
            ts = (1/s->params->cn_bandwidth) * msg->remote_event_size_bytes;
1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371
            e = codes_event_new(s->origin_svr, ts, lp);
            m = tw_event_data(e);
            char* tmp_ptr = (char*)msg;
            tmp_ptr += dragonfly_get_msg_sz();
            memcpy(m, tmp_ptr, msg->remote_event_size_bytes);
            tw_event_send(e);
     }
}

static void node_collective_init(terminal_state * s,
                        tw_bf * bf,
                        terminal_message * msg,
                        tw_lp * lp)
{
        tw_event * e_new;
        tw_lpid parent_nic_id;
        tw_stime xfer_to_nic_time;
        terminal_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 */
1372 1373 1374 1375 1376
            // TODO: be annotation-aware
            codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id,
                    NULL, &mapping_type_id, NULL, &mapping_rep_id,
                    &mapping_offset);
            num_lps = codes_mapping_get_lp_count(lp_group_name, 1, LP_CONFIG_NM,
1377 1378
                    s->anno, 0);
            codes_mapping_get_lp_id(lp_group_name, LP_CONFIG_NM, s->anno, 0,
1379 1380
                    s->parent_node_id/num_lps, (s->parent_node_id % num_lps),
                    &parent_nic_id);
1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410

           /* 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, DRAGONFLY, (void**)&msg_new, (void**)&m_data);
	    	
            memcpy(msg_new, msg, sizeof(terminal_message));
	    if (msg->remote_event_size_bytes){
        	memcpy(m_data, model_net_method_get_edata(DRAGONFLY, msg),
                	msg->remote_event_size_bytes);
      	    }
	    
            msg_new->type = D_COLLECTIVE_FAN_IN;
            msg_new->sender_node = s->node_id;

            tw_event_send(e_new);
        }
        return;
}

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

1411 1412 1413
        codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id,
                NULL, &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
        int num_lps = codes_mapping_get_lp_count(lp_group_name, 1, LP_CONFIG_NM,
1414
                s->anno, 0);
1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432

        tw_event* e_new;
        terminal_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 */
1433
            codes_mapping_get_lp_id(lp_group_name, LP_CONFIG_NM, s->anno, 0,
1434 1435
                    s->parent_node_id/num_lps, (s->parent_node_id % num_lps),
                    &parent_nic_id);
1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471

           /* 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, DRAGONFLY, (void**)&msg_new, &m_data);
	    
            memcpy(msg_new, msg, sizeof(terminal_message));
            msg_new->type = D_COLLECTIVE_FAN_IN;
            msg_new->sender_node = s->node_id;

            if (msg->remote_event_size_bytes){
	        memcpy(m_data, model_net_method_get_edata(DRAGONFLY, 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 */
1472 1473 1474
                codes_mapping_get_lp_id(lp_group_name, LP_CONFIG_NM, NULL, 1,
                        s->children[i]/num_lps, (s->children[i] % num_lps),
                        &child_nic_id);
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
                //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, DRAGONFLY, (void**)&msg_new, &m_data);

		memcpy(msg_new, msg, sizeof(terminal_message));
	        if (msg->remote_event_size_bytes){
1485
	                memcpy(m_data, model_net_method_get_edata(DRAGONFLY, msg),
1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501