dragonfly-custom.C 128 KB
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/*
 * Copyright (C) 2013 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
 */

#include <ross.h>

#include "codes/jenkins-hash.h"
#include "codes/codes_mapping.h"
#include "codes/codes.h"
#include "codes/model-net.h"
#include "codes/model-net-method.h"
#include "codes/model-net-lp.h"
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#include "codes/net/dragonfly-custom.h"
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#include "sys/file.h"
#include "codes/quickhash.h"
#include "codes/rc-stack.h"
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#include <vector>
#include <map>
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#include <set>
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#ifdef ENABLE_CORTEX
#include <cortex/cortex.h>
#include <cortex/topology.h>
#endif
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#define DUMP_CONNECTIONS 0
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#define PRINT_CONFIG 1
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#define CREDIT_SIZE 8
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#define DFLY_HASH_TABLE_SIZE 4999
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// debugging parameters
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#define DEBUG_LP 892
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#define T_ID 10
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#define TRACK -1
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#define TRACK_PKT 0
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#define TRACK_MSG -1
#define DEBUG 0
#define MAX_STATS 65536
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#define SHOW_ADAP_STATS 1
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#define LP_CONFIG_NM_TERM (model_net_lp_config_names[DRAGONFLY_CUSTOM])
#define LP_METHOD_NM_TERM (model_net_method_names[DRAGONFLY_CUSTOM])
#define LP_CONFIG_NM_ROUT (model_net_lp_config_names[DRAGONFLY_CUSTOM_ROUTER])
#define LP_METHOD_NM_ROUT (model_net_method_names[DRAGONFLY_CUSTOM_ROUTER])
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static int BIAS_MIN = 1;
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static int DF_DALLY = 0;
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static int adaptive_threshold = 1024;
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static long num_local_packets_sr = 0;
static long num_local_packets_sg = 0;
static long num_remote_packets = 0;
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using namespace std;
struct Link {
  int offset, type;
};
struct bLink {
  int offset, dest;
};
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/* Each entry in the vector is for a router id
 * against each router id, there is a map of links (key of the map is the dest
 * router id)
 * link has information on type (green or black) and offset (number of links
 * between that particular source and dest router ID)*/
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vector< map< int, vector<Link> > > intraGroupLinks;
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/* contains mapping between source router and destination group via link (link
 * has dest ID)*/
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vector< map< int, vector<bLink> > > interGroupLinks;
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/*MM: Maintains a list of routers connecting the source and destination groups */
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vector< vector< vector<int> > > connectionList;

struct IntraGroupLink {
  int src, dest, type;
};

struct InterGroupLink {
  int src, dest;
};

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#ifdef ENABLE_CORTEX
/* This structure is defined at the end of the file */
extern "C" {
extern cortex_topology dragonfly_custom_cortex_topology;
}
#endif
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static int debug_slot_count = 0;
static long term_ecount, router_ecount, term_rev_ecount, router_rev_ecount;
static long packet_gen = 0, packet_fin = 0;
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static double maxd(double a, double b) { return a < b ? b : a; }

/* minimal and non-minimal packet counts for adaptive routing*/
static int minimal_count=0, nonmin_count=0;
static int num_routers_per_mgrp = 0;

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;

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

/* router magic number */
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static int router_magic_num = 0;
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/* terminal magic number */
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static int terminal_magic_num = 0;
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/* Hops within a group */
static int num_intra_nonmin_hops = 4;
static int num_intra_min_hops = 2;

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static FILE * dragonfly_log = NULL;
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static int sample_bytes_written = 0;
static int sample_rtr_bytes_written = 0;
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static char cn_sample_file[MAX_NAME_LENGTH];
static char router_sample_file[MAX_NAME_LENGTH];
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//don't do overhead here - job of MPI layer
static tw_stime mpi_soft_overhead = 0;
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typedef struct terminal_custom_message_list terminal_custom_message_list;
struct terminal_custom_message_list {
    terminal_custom_message msg;
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    char* event_data;
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    terminal_custom_message_list *next;
    terminal_custom_message_list *prev;
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};

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static void init_terminal_custom_message_list(terminal_custom_message_list *thisO, 
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    terminal_custom_message *inmsg) {
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    thisO->msg = *inmsg;
    thisO->event_data = NULL;
    thisO->next = NULL;
    thisO->prev = NULL;
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}

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static void delete_terminal_custom_message_list(void *thisO) {
    terminal_custom_message_list* toDel = (terminal_custom_message_list*)thisO;
    if(toDel->event_data != NULL) free(toDel->event_data);
    free(toDel);
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}

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;
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    int intra_grp_radix;
    int num_col_chans;
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    int num_row_chans;
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    int num_router_rows;
    int num_router_cols;
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    int num_groups;
    int radix;
    int total_routers;
    int total_terminals;
    int num_global_channels;
    double cn_delay;
    double local_delay;
    double global_delay;
    double credit_delay;
    double router_delay;
};

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static const dragonfly_param* stored_params;


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struct dfly_hash_key
{
    uint64_t message_id;
    tw_lpid sender_id;
};

struct dfly_router_sample
{
    tw_lpid router_id;
    tw_stime* busy_time;
    int64_t* link_traffic_sample;
    tw_stime end_time;
    long fwd_events;
    long rev_events;
};

struct dfly_cn_sample
{
   tw_lpid terminal_id;
   long fin_chunks_sample;
   long data_size_sample;
   double fin_hops_sample;
   tw_stime fin_chunks_time;
   tw_stime busy_time_sample;
   tw_stime end_time;
   long fwd_events;
   long rev_events;
};

struct dfly_qhash_entry
{
   struct dfly_hash_key key;
   char * remote_event_data;
   int num_chunks;
   int remote_event_size;
   struct qhash_head hash_link;
};

/* handles terminal and router events like packet generate/send/receive/buffer */
typedef struct terminal_state terminal_state;
typedef struct router_state router_state;

/* dragonfly compute node data structure */
struct terminal_state
{
   uint64_t packet_counter;

   int packet_gen;
   int packet_fin;

   // Dragonfly specific parameters
   unsigned int router_id;
   unsigned int terminal_id;

   // Each terminal will have an input and output channel with the router
   int* vc_occupancy; // NUM_VC
   int num_vcs;
   tw_stime terminal_available_time;
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   terminal_custom_message_list **terminal_msgs;
   terminal_custom_message_list **terminal_msgs_tail;
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   int in_send_loop;
   struct mn_stats dragonfly_stats_array[CATEGORY_MAX];

   struct rc_stack * st;
   int issueIdle;
   int terminal_length;

   const char * anno;
   const dragonfly_param *params;

   struct qhash_table *rank_tbl;
   uint64_t rank_tbl_pop;

   tw_stime   total_time;
   uint64_t total_msg_size;
   double total_hops;
   long finished_msgs;
   long finished_chunks;
   long finished_packets;

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   tw_stime * last_buf_full;
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   tw_stime busy_time;
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   tw_stime max_latency;
   tw_stime min_latency;

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   char output_buf[4096];
   /* For LP suspend functionality */
   int error_ct;

   /* For sampling */
   long fin_chunks_sample;
   long data_size_sample;
   double fin_hops_sample;
   tw_stime fin_chunks_time;
   tw_stime busy_time_sample;

   char sample_buf[4096];
   struct dfly_cn_sample * sample_stat;
   int op_arr_size;
   int max_arr_size;
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   /* for logging forward and reverse events */
   long fwd_events;
   long rev_events;
};

/* terminal event type (1-4) */
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typedef enum event_t
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{
  T_GENERATE=1,
  T_ARRIVE,
  T_SEND,
  T_BUFFER,
  R_SEND,
  R_ARRIVE,
  R_BUFFER,
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} event_t;
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/* whether the last hop of a packet was global, local or a terminal */
enum last_hop
{
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   GLOBAL=1,
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   LOCAL,
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   TERMINAL,
   ROOT
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};

/* 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
{
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    MINIMAL = 1,
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    NON_MINIMAL,
    ADAPTIVE,
    PROG_ADAPTIVE
};

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enum LINK_TYPE
{
    GREEN,
    BLACK,
};
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struct router_state
{
   unsigned int router_id;
   int group_id;
   int op_arr_size;
   int max_arr_size;

   int* global_channel; 
   
   tw_stime* next_output_available_time;
   tw_stime* cur_hist_start_time;
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   tw_stime** last_buf_full;
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   tw_stime* busy_time;
   tw_stime* busy_time_sample;

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   terminal_custom_message_list ***pending_msgs;
   terminal_custom_message_list ***pending_msgs_tail;
   terminal_custom_message_list ***queued_msgs;
   terminal_custom_message_list ***queued_msgs_tail;
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   int *in_send_loop;
   int *queued_count;
   struct rc_stack * st;
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   int* last_sent_chan;
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   int** vc_occupancy;
   int64_t* link_traffic;
   int64_t * link_traffic_sample;

   const char * anno;
   const dragonfly_param *params;

   int* prev_hist_num;
   int* cur_hist_num;
   
   char output_buf[4096];
   char output_buf2[4096];

   struct dfly_router_sample * rsamples;
   
   long fwd_events;
   long rev_events;
};

static short routing = MINIMAL;

static tw_stime         dragonfly_total_time = 0;
static tw_stime         dragonfly_max_latency = 0;


static long long       total_hops = 0;
static long long       N_finished_packets = 0;
static long long       total_msg_sz = 0;
static long long       N_finished_msgs = 0;
static long long       N_finished_chunks = 0;

static int dragonfly_rank_hash_compare(
        void *key, struct qhash_head *link)
{
    struct dfly_hash_key *message_key = (struct dfly_hash_key *)key;
    struct dfly_qhash_entry *tmp = NULL;

    tmp = qhash_entry(link, struct dfly_qhash_entry, hash_link);
    
    if (tmp->key.message_id == message_key->message_id
            && tmp->key.sender_id == message_key->sender_id)
        return 1;

    return 0;
}
static int dragonfly_hash_func(void *k, int table_size)
{
    struct dfly_hash_key *tmp = (struct dfly_hash_key *)k;
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    uint32_t pc = 0, pb = 0;	
    bj_hashlittle2(tmp, sizeof(*tmp), &pc, &pb);
    return (int)(pc % (table_size - 1));
    /*uint64_t key = (~tmp->message_id) + (tmp->message_id << 18);
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    key = key * 21;
    key = ~key ^ (tmp->sender_id >> 4);
    key = key * tmp->sender_id; 
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    return (int)(key & (table_size - 1));*/
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}

/* 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);
    /* GiB to s */
    time = time / GB_p_s;
    /* s to ns */
    time = time * 1000.0 * 1000.0 * 1000.0;

    return(time);
}

/* returns the dragonfly message size */
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int dragonfly_custom_get_msg_sz(void)
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{
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	   return sizeof(terminal_custom_message);
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}

static void free_tmp(void * ptr)
{
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    struct dfly_qhash_entry * dfly = (dfly_qhash_entry *)ptr; 
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    if(dfly->remote_event_data)
        free(dfly->remote_event_data);
   
    if(dfly)
        free(dfly);
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}
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static void append_to_terminal_custom_message_list(  
        terminal_custom_message_list ** thisq,
        terminal_custom_message_list ** thistail,
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        int index, 
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        terminal_custom_message_list *msg) {
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    if(thisq[index] == NULL) {
        thisq[index] = msg;
    } else {
        thistail[index]->next = msg;
        msg->prev = thistail[index];
    } 
    thistail[index] = msg;
}

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static void prepend_to_terminal_custom_message_list(  
        terminal_custom_message_list ** thisq,
        terminal_custom_message_list ** thistail,
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        int index, 
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        terminal_custom_message_list *msg) {
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    if(thisq[index] == NULL) {
        thistail[index] = msg;
    } else {
        thisq[index]->prev = msg;
        msg->next = thisq[index];
    } 
    thisq[index] = msg;
}

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static terminal_custom_message_list* return_head(
        terminal_custom_message_list ** thisq,
        terminal_custom_message_list ** thistail,
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        int index) {
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    terminal_custom_message_list *head = thisq[index];
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    if(head != NULL) {
        thisq[index] = head->next;
        if(head->next != NULL) {
            head->next->prev = NULL;
            head->next = NULL;
        } else {
            thistail[index] = NULL;
        }
    }
    return head;
}

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static terminal_custom_message_list* return_tail(
        terminal_custom_message_list ** thisq,
        terminal_custom_message_list ** thistail,
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        int index) {
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    terminal_custom_message_list *tail = thistail[index];
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    assert(tail);
    if(tail->prev != NULL) {
        tail->prev->next = NULL;
        thistail[index] = tail->prev;
        tail->prev = NULL;
    } else {
        thistail[index] = NULL;
        thisq[index] = NULL;
    }
    return tail;
}

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void dragonfly_print_params(const dragonfly_param *p)
{
    int myRank;
    MPI_Comm_rank(MPI_COMM_CODES, &myRank);
    if (!myRank) { 
        printf("\n------------------ Dragonfly Custom Parameters ---------\n");
        printf("\tnum_routers =            %d\n",p->num_routers);
        printf("\tlocal_bandwidth =        %.2f\n",p->local_bandwidth);
        printf("\tglobal_bandwidth =       %.2f\n",p->global_bandwidth);
        printf("\tcn_bandwidth =           %.2f\n",p->cn_bandwidth);
        printf("\tnum_vcs =                %d\n",p->num_vcs);
        printf("\tlocal_vc_size =          %d\n",p->local_vc_size);
        printf("\tglobal_vc_size =         %d\n",p->global_vc_size);
        printf("\tcn_vc_size =             %d\n",p->cn_vc_size);
        printf("\tchunk_size =             %d\n",p->chunk_size);
        printf("\tnum_cn =                 %d\n",p->num_cn);
        printf("\tintra_grp_radix =        %d\n",p->intra_grp_radix);
        printf("\tnum_col_chans =          %d\n",p->num_col_chans);
        printf("\tnum_row_chans =          %d\n",p->num_row_chans);
        printf("\tnum_router_rows =        %d\n",p->num_router_rows);
        printf("\tnum_router_cols =        %d\n",p->num_router_cols);
        printf("\tnum_groups =             %d\n",p->num_groups);
        printf("\tradix =                  %d\n",p->radix);
        printf("\ttotal_routers =          %d\n",p->total_routers);
        printf("\ttotal_terminals =        %d\n",p->total_terminals);
        printf("\tnum_global_channels =    %d\n",p->num_global_channels);
        printf("\tcn_delay =               %.2f\n",p->cn_delay);
        printf("\tlocal_delay =            %.2f\n",p->local_delay);
        printf("\tglobal_delay =           %.2f\n",p->global_delay);
        printf("\tcredit_delay =           %.2f\n",p->credit_delay);
        printf("\trouter_delay =           %.2f\n",p->router_delay);
        printf("\trouting =                %d\n",routing);
        printf("------------------------------------------------------\n\n");
    }
}

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static void dragonfly_read_config(const char * anno, dragonfly_param *params){
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    /*Adding init for router magic number*/
    uint32_t h1 = 0, h2 = 0; 
    bj_hashlittle2(LP_METHOD_NM_ROUT, strlen(LP_METHOD_NM_ROUT), &h1, &h2);
    router_magic_num = h1 + h2;
    
    bj_hashlittle2(LP_METHOD_NM_TERM, strlen(LP_METHOD_NM_TERM), &h1, &h2);
    terminal_magic_num = h1 + h2;
    
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    // shorthand
    dragonfly_param *p = params;
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    int myRank;
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    MPI_Comm_rank(MPI_COMM_CODES, &myRank);
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    int rc = configuration_get_value_int(&config, "PARAMS", "local_vc_size", anno, &p->local_vc_size);
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    if(rc) {
        p->local_vc_size = 1024;
        fprintf(stderr, "Buffer size of local channels not specified, setting to %d\n", p->local_vc_size);
    }

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    rc = configuration_get_value_int(&config, "PARAMS", "adaptive_threshold", anno, &adaptive_threshold);
    if(rc) {
    	adaptive_threshold = p->local_vc_size / 8;
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        printf("\n Setting adaptive threshold to %d ", adaptive_threshold);
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	}
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    else
    {
        printf("\n Setting adaptive threshold to %d ", adaptive_threshold);
    }
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    rc = configuration_get_value_int(&config, "PARAMS", "global_vc_size", anno, &p->global_vc_size);
    if(rc) {
        p->global_vc_size = 2048;
        fprintf(stderr, "Buffer size of global channels not specified, setting to %d\n", p->global_vc_size);
    }

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    rc = configuration_get_value_int(&config, "PARAMS", "df-dally-vc", anno, &DF_DALLY);
    if(rc) {
        DF_DALLY = 0;
    }
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    rc = configuration_get_value_int(&config, "PARAMS", "minimal-bias", anno, &BIAS_MIN);
    if(rc) {
        BIAS_MIN = 0;
    }
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    else
	printf("\n Setting minimal bias");

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

    rc = configuration_get_value_int(&config, "PARAMS", "chunk_size", anno, &p->chunk_size);
    if(rc) {
        p->chunk_size = 512;
        fprintf(stderr, "Chunk size for packets is specified, setting to %d\n", p->chunk_size);
    }

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

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

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

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    rc = configuration_get_value_double(&config, "PARAMS", "router_delay", anno,
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            &p->router_delay);
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    if(rc) {
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      p->router_delay = 100;
    }
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    configuration_get_value(&config, "PARAMS", "cn_sample_file", anno, cn_sample_file,
            MAX_NAME_LENGTH);
    configuration_get_value(&config, "PARAMS", "rt_sample_file", anno, router_sample_file,
            MAX_NAME_LENGTH);
    
    char routing_str[MAX_NAME_LENGTH];
    configuration_get_value(&config, "PARAMS", "routing", anno, routing_str,
            MAX_NAME_LENGTH);
    if(strcmp(routing_str, "minimal") == 0)
        routing = MINIMAL;
    else if(strcmp(routing_str, "nonminimal")==0 || 
            strcmp(routing_str,"non-minimal")==0)
        routing = NON_MINIMAL;
    else if (strcmp(routing_str, "adaptive") == 0)
        routing = ADAPTIVE;
    else if (strcmp(routing_str, "prog-adaptive") == 0)
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	      routing = PROG_ADAPTIVE;
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    else
    {
        fprintf(stderr, 
                "No routing protocol specified, setting to minimal routing\n");
        routing = -1;
    }

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    // rc = configuration_get_value_int(&config, "PARAMS", "num_vcs_override", anno, &p->num_vcs);
    // if(rc) {
    //     if(routing == PROG_ADAPTIVE)
    //         p->num_vcs = 10;
    //     else
    //         p->num_vcs = 8;
    // }
    // else {
    //     printf("Overriding num_vcs: p->num_vcs=%d\n",p->num_vcs);
    // }
660 661 662
   
if(DF_DALLY == 0) 
{
663 664 665 666
    if(routing == PROG_ADAPTIVE)
        p->num_vcs = 10;
    else
        p->num_vcs = 8;
667 668 669
}
else
{
670
    if(routing == PROG_ADAPTIVE)
671
        p->num_vcs = 5;
672
    else
673
        p->num_vcs = 4;
674
}
675 676 677
    rc = configuration_get_value_int(&config, "PARAMS", "num_groups", anno, &p->num_groups);
    if(rc) {
      printf("Number of groups not specified. Aborting");
678
      MPI_Abort(MPI_COMM_CODES, 1);
679
    }
680 681 682 683 684
    rc = configuration_get_value_int(&config, "PARAMS", "num_col_chans", anno, &p->num_col_chans);
    if(rc) {
//        printf("\n Number of links connecting chassis not specified, setting to default value 3 ");
        p->num_col_chans = 3;
    }
685 686 687 688 689
    rc = configuration_get_value_int(&config, "PARAMS", "num_row_chans", anno, &p->num_row_chans);
    if(rc) {
//        printf("\n Number of links connecting chassis not specified, setting to default value 3 ");
        p->num_row_chans = 1;
    }
690 691 692 693 694 695 696 697 698 699
    rc = configuration_get_value_int(&config, "PARAMS", "num_router_rows", anno, &p->num_router_rows);
    if(rc) {
        printf("\n Number of router rows not specified, setting to 6 ");
        p->num_router_rows = 6;
    }
    rc = configuration_get_value_int(&config, "PARAMS", "num_router_cols", anno, &p->num_router_cols);
    if(rc) {
        printf("\n Number of router columns not specified, setting to 16 ");
        p->num_router_cols = 16;
    }
700 701 702 703
    p->intra_grp_radix = (p->num_router_cols * p->num_row_chans);
    if(p->num_router_rows > 1)
        p->intra_grp_radix += (p->num_router_rows * p->num_col_chans);

704 705
    p->num_routers = p->num_router_rows * p->num_router_cols;
    
706
    rc = configuration_get_value_int(&config, "PARAMS", "num_cns_per_router", anno, &p->num_cn);
707
    if(rc) {
708 709
        printf("\n Number of cns per router not specified, setting to %d ", p->num_routers/2);
        p->num_cn = p->num_routers/2;
710
    }
711

712 713
    rc = configuration_get_value_int(&config, "PARAMS", "num_global_channels", anno, &p->num_global_channels);
    if(rc) {
714 715
        printf("\n Number of global channels per router not specified, setting to 10 ");
        p->num_global_channels = 10;
716
    }
717
    p->radix = p->intra_grp_radix + p->num_global_channels + p->num_cn;
718 719
    p->total_routers = p->num_groups * p->num_routers;
    p->total_terminals = p->total_routers * p->num_cn;
720 721 722 723
    
    // read intra group connections, store from a router's perspective
    // all links to the same router form a vector
    char intraFile[MAX_NAME_LENGTH];
724
    configuration_get_value(&config, "PARAMS", "intra-group-connections", 
725
        anno, intraFile, MAX_NAME_LENGTH);
726 727
    if(strlen(intraFile) <= 0) {
      tw_error(TW_LOC, "Intra group connections file not specified. Aborting");
728 729
    }
    FILE *groupFile = fopen(intraFile, "rb");
730 731 732
    if(!groupFile)
        tw_error(TW_LOC, "intra-group file not found ");

733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754
    if(!myRank)
      printf("Reading intra-group connectivity file: %s\n", intraFile);

    {
      vector< int > offsets;
      offsets.resize(p->num_routers, 0);
      intraGroupLinks.resize(p->num_routers);
      IntraGroupLink newLink;

      while(fread(&newLink, sizeof(IntraGroupLink), 1, groupFile) != 0) {
        Link tmpLink;
        tmpLink.type = newLink.type;
        tmpLink.offset = offsets[newLink.src]++;
        intraGroupLinks[newLink.src][newLink.dest].push_back(tmpLink);
      }
    }

    fclose(groupFile);

    // read inter group connections, store from a router's perspective
    // also create a group level table that tells all the connecting routers
    char interFile[MAX_NAME_LENGTH];
755
    configuration_get_value(&config, "PARAMS", "inter-group-connections", 
756
        anno, interFile, MAX_NAME_LENGTH);
757 758
    if(strlen(interFile) <= 0) {
      tw_error(TW_LOC, "Inter group connections file not specified. Aborting");
759 760 761
    }
    FILE *systemFile = fopen(interFile, "rb");
    if(!myRank)
762
    {
763
      printf("Reading inter-group connectivity file: %s\n", interFile);
764 765
      printf("\n Total routers %d total groups %d ", p->total_routers, p->num_groups);
    }
766 767 768 769 770 771 772 773 774

    {
      vector< int > offsets;
      offsets.resize(p->total_routers, 0);
      interGroupLinks.resize(p->total_routers);
      connectionList.resize(p->num_groups);
      for(int g = 0; g < connectionList.size(); g++) {
        connectionList[g].resize(p->num_groups);
      }
775
      
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796
      InterGroupLink newLink;

      while(fread(&newLink, sizeof(InterGroupLink), 1, systemFile) != 0) {
        bLink tmpLink;
        tmpLink.dest = newLink.dest;
        int srcG = newLink.src / p->num_routers;
        int destG = newLink.dest / p->num_routers;
        tmpLink.offset = offsets[newLink.src]++;
        interGroupLinks[newLink.src][destG].push_back(tmpLink);
        int r;
        for(r = 0; r < connectionList[srcG][destG].size(); r++) {
          if(connectionList[srcG][destG][r] == newLink.src) break;
        }
        if(r == connectionList[srcG][destG].size()) {
          connectionList[srcG][destG].push_back(newLink.src);
        }
      }
    }

    fclose(systemFile);

797
#if DUMP_CONNECTIONS == 1
798 799 800 801 802 803 804 805
    printf("Dumping intra-group connections\n");
    for(int a = 0; a < intraGroupLinks.size(); a++) {
      printf("Connections for router %d\n", a);
      map< int, vector<Link> >  &curMap = intraGroupLinks[a];
      map< int, vector<Link> >::iterator it = curMap.begin();
      for(; it != curMap.end(); it++) {
        printf(" ( %d - ", it->first);
        for(int l = 0; l < it->second.size(); l++) {
806
          // offset is number of local connections
807
          // type is black or green according to Cray architecture 
808 809 810 811 812 813 814
          printf("%d,%d ", it->second[l].offset, it->second[l].type);
        }
        printf(")");
      }
      printf("\n");
    }
#endif
815
#if DUMP_CONNECTIONS == 1
816 817 818
    printf("Dumping inter-group connections\n");
    for(int a = 0; a < interGroupLinks.size(); a++) {
      printf("Connections for router %d\n", a);
819 820
      map< int, vector<bLink> >  &curMap = interGroupLinks[a];
      map< int, vector<bLink> >::iterator it = curMap.begin();
821
      for(; it != curMap.end(); it++) {
822
        // dest group ID 
823 824
        printf(" ( %d - ", it->first);
        for(int l = 0; l < it->second.size(); l++) {
825 826
            // dest is dest router ID
            // offset is number of global connections
827 828 829 830 831 832 833 834
          printf("%d,%d ", it->second[l].offset, it->second[l].dest);
        }
        printf(")");
      }
      printf("\n");
    }
#endif

835
#if DUMP_CONNECTIONS == 1
836 837 838 839 840 841 842 843 844 845 846 847 848
    printf("Dumping source aries for global connections\n");
    for(int g = 0; g < p->num_groups; g++) {
      for(int g1 = 0; g1 < p->num_groups; g1++) {
        printf(" ( ");
        for(int l = 0; l < connectionList[g][g1].size(); l++) {
          printf("%d ", connectionList[g][g1][l]);
        }
        printf(")");
      }
      printf("\n");
    }
#endif
    if(!myRank) {
849
        printf("\n Total nodes %d routers %d groups %d routers per group %d radix %d\n",
850
                p->num_cn * p->total_routers, p->total_routers, p->num_groups,
851
                p->num_routers, p->radix);
852
    }
853

854 855 856
    p->cn_delay = bytes_to_ns(p->chunk_size, p->cn_bandwidth);
    p->local_delay = bytes_to_ns(p->chunk_size, p->local_bandwidth);
    p->global_delay = bytes_to_ns(p->chunk_size, p->global_bandwidth);
857
    p->credit_delay = bytes_to_ns(CREDIT_SIZE, p->local_bandwidth); //assume 8 bytes packet
858 859 860 861 862

    if (PRINT_CONFIG) 
        dragonfly_print_params(p);

    stored_params = p;
863 864
}

865
void dragonfly_custom_configure(){
866 867 868
    anno_map = codes_mapping_get_lp_anno_map(LP_CONFIG_NM_TERM);
    assert(anno_map);
    num_params = anno_map->num_annos + (anno_map->has_unanno_lp > 0);
869
    all_params = (dragonfly_param *)malloc(num_params * sizeof(*all_params));
870 871 872 873 874 875 876 877

    for (int i = 0; i < anno_map->num_annos; i++){
        const char * anno = anno_map->annotations[i].ptr;
        dragonfly_read_config(anno, &all_params[i]);
    }
    if (anno_map->has_unanno_lp > 0){
        dragonfly_read_config(NULL, &all_params[anno_map->num_annos]);
    }
878 879 880
#ifdef ENABLE_CORTEX
	model_net_topology = dragonfly_custom_cortex_topology;
#endif
881 882 883
}

/* report dragonfly statistics like average and maximum packet latency, average number of hops traversed */
884
void dragonfly_custom_report_stats()
885 886 887 888 889 890
{
   long long avg_hops, total_finished_packets, total_finished_chunks;
   long long total_finished_msgs, final_msg_sz;
   tw_stime avg_time, max_time;
   int total_minimal_packets, total_nonmin_packets;
   long total_gen, total_fin;
891
   long total_local_packets_sr, total_local_packets_sg, total_remote_packets;
892

893 894 895 896 897 898 899
   MPI_Reduce( &total_hops, &avg_hops, 1, MPI_LONG_LONG, MPI_SUM, 0, MPI_COMM_CODES);
   MPI_Reduce( &N_finished_packets, &total_finished_packets, 1, MPI_LONG_LONG, MPI_SUM, 0, MPI_COMM_CODES);
   MPI_Reduce( &N_finished_msgs, &total_finished_msgs, 1, MPI_LONG_LONG, MPI_SUM, 0, MPI_COMM_CODES);
   MPI_Reduce( &N_finished_chunks, &total_finished_chunks, 1, MPI_LONG_LONG, MPI_SUM, 0, MPI_COMM_CODES);
   MPI_Reduce( &total_msg_sz, &final_msg_sz, 1, MPI_LONG_LONG, MPI_SUM, 0, MPI_COMM_CODES);
   MPI_Reduce( &dragonfly_total_time, &avg_time, 1,MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_CODES);
   MPI_Reduce( &dragonfly_max_latency, &max_time, 1, MPI_DOUBLE, MPI_MAX, 0, MPI_COMM_CODES);
900
   
901
   MPI_Reduce( &packet_gen, &total_gen, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
902
   MPI_Reduce(&packet_fin, &total_fin, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
903 904
    MPI_Reduce( &num_local_packets_sr, &total_local_packets_sr, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
    MPI_Reduce( &num_local_packets_sg, &total_local_packets_sg, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
905
   MPI_Reduce( &num_remote_packets, &total_remote_packets, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
906
   if(routing == ADAPTIVE || routing == PROG_ADAPTIVE || SHOW_ADAP_STATS)
907
    {
908 909
	MPI_Reduce(&minimal_count, &total_minimal_packets, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_CODES);
 	MPI_Reduce(&nonmin_count, &total_nonmin_packets, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_CODES);
910 911 912 913 914
    }

   /* print statistics */
   if(!g_tw_mynode)
   {	
915 916 917
    if (PRINT_CONFIG) 
        dragonfly_print_params(stored_params);

918 919
      printf(" Average number of hops traversed %f average chunk latency %lf us maximum chunk latency %lf us avg message size %lf bytes finished messages %lld finished chunks %lld \n", 
              (float)avg_hops/total_finished_chunks, avg_time/(total_finished_chunks*1000), max_time/1000, (float)final_msg_sz/total_finished_msgs, total_finished_msgs, total_finished_chunks);
920
     if(routing == ADAPTIVE || routing == PROG_ADAPTIVE || SHOW_ADAP_STATS)
921 922 923
              printf("\n ADAPTIVE ROUTING STATS: %d chunks routed minimally %d chunks routed non-minimally completed packets %lld \n", 
                      total_minimal_packets, total_nonmin_packets, total_finished_chunks);
 
924
      printf("\n Total packets generated %ld finished %ld Locally routed- same router %ld different-router %ld Remote (inter-group) %ld \n", total_gen, total_fin, total_local_packets_sr, total_local_packets_sg, total_remote_packets);
925 926 927 928 929 930 931
   }
   return;
}


/* initialize a dragonfly compute node terminal */
void 
932
terminal_custom_init( terminal_state * s, 
933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
	       tw_lp * lp )
{
    s->packet_gen = 0;
    s->packet_fin = 0;

    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_TERM,
           s->anno, 0);

958
   s->terminal_id = codes_mapping_get_lp_relative_id(lp->gid, 0, 0);
959
   s->router_id=(int)s->terminal_id / (s->params->num_cn);
960 961
   s->terminal_available_time = 0.0;
   s->packet_counter = 0;
962 963 964
   s->min_latency = INT_MAX;
   s->max_latency = 0;   

965 966 967 968 969 970 971 972 973 974 975 976 977 978
   s->finished_msgs = 0;
   s->finished_chunks = 0;
   s->finished_packets = 0;
   s->total_time = 0.0;
   s->total_msg_size = 0;

   s->busy_time = 0.0;

   s->fwd_events = 0;
   s->rev_events = 0;

   rc_stack_create(&s->st);
   s->num_vcs = 1;
   s->vc_occupancy = (int*)malloc(s->num_vcs * sizeof(int));
979
   s->last_buf_full = (tw_stime*)malloc(s->num_vcs * sizeof(tw_stime));
980 981 982

   for( i = 0; i < s->num_vcs; i++ )
    {
983
      s->last_buf_full[i] = 0.0;
984 985 986 987
      s->vc_occupancy[i]=0;
    }


988
   s->rank_tbl = NULL;
989
   s->terminal_msgs = 
990
       (terminal_custom_message_list**)malloc(s->num_vcs*sizeof(terminal_custom_message_list*));
991
   s->terminal_msgs_tail = 
992
       (terminal_custom_message_list**)malloc(s->num_vcs*sizeof(terminal_custom_message_list*));
993 994 995 996 997 998 999 1000 1001 1002 1003
   s->terminal_msgs[0] = NULL;
   s->terminal_msgs_tail[0] = NULL;
   s->terminal_length = 0;
   s->in_send_loop = 0;
   s->issueIdle = 0;

   return;
}

/* sets up the router virtual channels, global channels, 
 * local channels, compute node channels */
1004
void router_custom_setup(router_state * r, tw_lp * lp)
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
{
    
    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;

1023
    num_routers_per_mgrp = codes_mapping_get_lp_count (lp_group_name, 1, "modelnet_dragonfly_custom_router",
1024 1025 1026 1027 1028 1029 1030
            NULL, 0);
    int num_grp_reps = codes_mapping_get_group_reps(lp_group_name);
    if(p->total_routers != num_grp_reps * num_routers_per_mgrp)
        tw_error(TW_LOC, "\n Config error: num_routers specified %d total routers computed in the network %d "
                "does not match with repetitions * dragonfly_router %d  ",
                p->num_routers, p->total_routers, num_grp_reps * num_routers_per_mgrp);

1031
   r->router_id = codes_mapping_get_lp_relative_id(lp->gid, 0, 0);
1032
   r->group_id=r->router_id/p->num_routers;
1033 1034
    
   //printf("\n Local router id %d global id %d ", r->router_id, lp->gid);
1035 1036 1037 1038

   r->fwd_events = 0;
   r->rev_events = 0;

1039

1040 1041 1042 1043 1044 1045 1046
   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->cur_hist_start_time = (tw_stime*)malloc(p->radix * sizeof(tw_stime));
   r->link_traffic = (int64_t*)malloc(p->radix * sizeof(int64_t));
   r->link_traffic_sample = (int64_t*)malloc(p->radix * sizeof(int64_t));
   r->cur_hist_num = (int*)malloc(p->radix * sizeof(int));
   r->prev_hist_num = (int*)malloc(p->radix * sizeof(int));
1047 1048
  
   r->last_sent_chan = (int*) malloc(p->num_router_rows * sizeof(int));
1049 1050 1051
   r->vc_occupancy = (int**)malloc(p->radix * sizeof(int*));
   r->in_send_loop = (int*)malloc(p->radix * sizeof(int));
   r->pending_msgs = 
1052
    (terminal_custom_message_list***)malloc(p->radix * sizeof(terminal_custom_message_list**));
1053
   r->pending_msgs_tail = 
1054
    (terminal_custom_message_list***)malloc(p->radix * sizeof(terminal_custom_message_list**));
1055
   r->queued_msgs = 
1056
    (terminal_custom_message_list***)malloc(p->radix * sizeof(terminal_custom_message_list**));
1057
   r->queued_msgs_tail = 
1058
    (terminal_custom_message_list***)malloc(p->radix * sizeof(terminal_custom_message_list**));
1059
   r->queued_count = (int*)malloc(p->radix * sizeof(int));
1060
   r->last_buf_full = (tw_stime**)malloc(p->radix * sizeof(tw_stime*));
1061 1062 1063 1064
   r->busy_time = (tw_stime*)malloc(p->radix * sizeof(tw_stime));
   r->busy_time_sample = (tw_stime*)malloc(p->radix * sizeof(tw_stime));

   rc_stack_create(&r->st);
1065 1066 1067 1068

   for(int i = 0; i < p->num_router_rows; i++)
       r->last_sent_chan[i] = 0;

1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
   for(int i=0; i < p->radix; i++)
    {
       // Set credit & router occupancy
    r->busy_time[i] = 0.0;
    r->busy_time_sample[i] = 0.0;
	r->next_output_available_time[i]=0;
	r->cur_hist_start_time[i] = 0;
    r->link_traffic[i]=0;
    r->link_traffic_sample[i] = 0;
	r->cur_hist_num[i] = 0;
	r->prev_hist_num[i] = 0;
    r->queued_count[i] = 0;    
    r->in_send_loop[i] = 0;
    r->vc_occupancy[i] = (int*)malloc(p->num_vcs * sizeof(int));
1083 1084
    r->pending_msgs[i] = (terminal_custom_message_list**)malloc(p->num_vcs * 
        sizeof(terminal_custom_message_list*));
1085
    r->last_buf_full[i] = (tw_stime*)malloc(p->num_vcs * sizeof(tw_stime));
1086 1087 1088 1089 1090 1091
    r->pending_msgs_tail[i] = (terminal_custom_message_list**)malloc(p->num_vcs * 
        sizeof(terminal_custom_message_list*));
    r->queued_msgs[i] = (terminal_custom_message_list**)malloc(p->num_vcs * 
        sizeof(terminal_custom_message_list*));
    r->queued_msgs_tail[i] = (terminal_custom_message_list**)malloc(p->num_vcs * 
        sizeof(terminal_custom_message_list*));
1092
        for(int j = 0; j < p->num_vcs; j++) {
1093
            r->last_buf_full[i][j] = 0.0;
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
            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;
        }
    }
   return;
}	


/* dragonfly packet event , generates a dragonfly packet on the compute node */
1106
static tw_stime dragonfly_custom_packet_event(
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
        model_net_request const * req,
        uint64_t message_offset,
        uint64_t packet_size,
        tw_stime offset,
        mn_sched_params const * sched_params,
        void const * remote_event,
        void const * self_event,
        tw_lp *sender,
        int is_last_pckt)
{
    (void)message_offset;
    (void)sched_params;
    tw_event * e_new;
    tw_stime xfer_to_nic_time;
1121
    terminal_custom_message * msg;
1122 1123 1124 1125 1126 1127
    char* tmp_ptr;

    xfer_to_nic_time = codes_local_latency(sender); 
    //e_new = tw_event_new(sender->gid, 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,
1128
            sender, DRAGONFLY_CUSTOM, (void**)&msg, (void**)&tmp_ptr);
1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
    strcpy(msg->category, req->category);
    msg->final_dest_gid = req->final_dest_lp;
    msg->total_size = req->msg_size;
    msg->sender_lp=req->src_lp;
    msg->sender_mn_lp = sender->gid;
    msg->packet_size = packet_size;
    msg->travel_start_time = tw_now(sender);
    msg->remote_event_size_bytes = 0;
    msg->local_event_size_bytes = 0;
    msg->type = T_GENERATE;
    msg->dest_terminal_id = req->dest_mn_lp;
    msg->message_id = req->msg_id;
    msg->is_pull = req->is_pull;
    msg->pull_size = req->pull_size;
    msg->magic = terminal_magic_num; 
    msg->msg_start_time = req->msg_start_time;

    if(is_last_pckt) /* Its the last packet so pass in remote and local event information*/
      {
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159
        if(req->remote_event_size > 0)
         {
            msg->remote_event_size_bytes = req->remote_event_size;
            memcpy(tmp_ptr, remote_event, req->remote_event_size);
            tmp_ptr += req->remote_event_size;
        }
        if(req->self_event_size > 0)
        {
            msg->local_event_size_bytes = req->self_event_size;
            memcpy(tmp_ptr, self_event, req->self_event_size);
            tmp_ptr += req->self_event_size;
        }
1160 1161 1162 1163 1164 1165 1166
     }
	   //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);
    tw_event_send(e_new);
    return xfer_to_nic_time;
}

/* dragonfly packet event reverse handler */
1167
static void dragonfly_custom_packet_event_rc(tw_lp *sender)
1168 1169 1170 1171 1172 1173
{
	  codes_local_latency_reverse(sender);
	    return;
}

/*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*/
1174
static void router_credit_send(router_state * s, terminal_custom_message * msg, 
1175 1176 1177
  tw_lp * lp, int sq) {
  tw_event * buf_e;
  tw_stime ts;
1178
  terminal_custom_message * buf_msg;
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189

  int dest = 0,  type = R_BUFFER;
  int is_terminal = 0;

  const dragonfly_param *p = s->params;
 
  // Notify sender terminal about available buffer space
  if(msg->last_hop == TERMINAL) {
    dest = msg->src_terminal_id;
    type = T_BUFFER;
    is_terminal = 1;
1190 1191 1192 1193
  } else if(msg->last_hop == GLOBAL 
          || msg->last_hop == LOCAL
          || msg->last_hop == ROOT)
  {
1194 1195 1196 1197 1198 1199 1200
    dest = msg->intm_lp_id;
  } else
    printf("\n Invalid message type");

  ts = g_tw_lookahead + p->credit_delay +  tw_rand_unif(lp->rng);
	
  if (is_terminal) {
1201
    buf_e = model_net_method_event_new(dest, ts, lp, DRAGONFLY_CUSTOM, 
1202 1203 1204
      (void**)&buf_msg, NULL);
    buf_msg->magic = terminal_magic_num;
  } else {
1205
    buf_e = model_net_method_event_new(dest, ts, lp, DRAGONFLY_CUSTOM_ROUTER,
1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223
            (void**)&buf_msg, NULL);
    buf_msg->magic = router_magic_num;
  }
 
  if(sq == -1) {
    buf_msg->vc_index = msg->vc_index;
    buf_msg->output_chan = msg->output_chan;
  } else {
    buf_msg->vc_index = msg->saved_vc;
    buf_msg->output_chan = msg->saved_channel;
  }
  
  buf_msg->type = type;

  tw_event_send(buf_e);
  return;
}

1224
static void packet_generate_rc(terminal_state * s, tw_bf * bf, terminal_custom_message * msg, tw_lp * lp)
1225 1226 1227
{
   s->packet_gen--;
   packet_gen--;
1228 1229
   s->packet_counter--;

1230 1231 1232
   tw_rand_reverse_unif(lp->rng);

   int num_chunks = msg->packet_size/s->params->chunk_size;
1233
   if(msg->packet_size < s->params->chunk_size)
1234 1235 1236 1237
       num_chunks++;

   int i;
   for(i = 0; i < num_chunks; i++) {
1238
        delete_terminal_custom_message_list(return_tail(s->terminal_msgs, 
1239 1240 1241 1242 1243 1244 1245 1246 1247
          s->terminal_msgs_tail, 0));
        s->terminal_length -= s->params->chunk_size;
   }
    if(bf->c5) {
        codes_local_latency_reverse(lp);
        s->in_send_loop = 0;
    }
      if(bf->c11) {
        s->issueIdle = 0;
1248 1249 1250 1251
        if(bf->c8)
        {
            s->last_buf_full[0] = msg->saved_busy_time;
        }
1252 1253 1254 1255 1256 1257 1258 1259 1260
      }
     struct 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/s->params->cn_bandwidth) * msg->packet_size;
}

/* generates packet at the current dragonfly compute node */
1261
static void packet_generate(terminal_state * s, tw_bf * bf, terminal_custom_message * msg, 
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272
  tw_lp * lp) {
  packet_gen++;
  s->packet_gen++;

  tw_stime ts, nic_ts;

  assert(lp->gid != msg->dest_terminal_id);
  const dragonfly_param *p = s->params;

  int total_event_size;
  uint64_t num_chunks = msg->packet_size / p->chunk_size;
1273 1274
  double cn_delay = s->params->cn_delay;

1275
  if (msg->packet_size < s->params->chunk_size) 
1276 1277
      num_chunks++;

1278 1279 1280
  if(msg->packet_size < s->params->chunk_size)
      cn_delay = bytes_to_ns(msg->packet_size % s->params->chunk_size, s->params->cn_bandwidth);

1281 1282 1283 1284 1285
  int dest_router_id = codes_mapping_get_lp_relative_id(msg->dest_terminal_id, 0, 0) / s->params->num_cn;
  int dest_grp_id = dest_router_id / s->params->num_routers; 
  int src_grp_id = s->router_id / s->params->num_routers; 

  if(src_grp_id == dest_grp_id)
1286 1287 1288 1289 1290 1291
  {
      if(dest_router_id == s->router_id)
          num_local_packets_sr++;
      else
          num_local_packets_sg++;
  }
1292
  else
1293
  {
1294
      num_remote_packets++;
1295
  }
1296
  nic_ts = g_tw_lookahead + (num_chunks * cn_delay) + tw_rand_unif(lp->rng);
1297
  
1298
  msg->packet_ID = s->packet_counter;
1299
  s->packet_counter++;
1300 1301 1302 1303 1304
  msg->my_N_hop = 0;
  msg->my_l_hop = 0;
  msg->my_g_hop = 0;


1305
  for(int i = 0; i < num_chunks; i++)
1306
  {
1307 1308
    terminal_custom_message_list *cur_chunk = (terminal_custom_message_list*)malloc(
      sizeof(terminal_custom_message_list));
1309
    msg->origin_router_id = s->router_id;
1310
    init_terminal_custom_message_list(cur_chunk, msg);
1311 1312 1313 1314 1315 1316
  
    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);
    }
    
1317
    void * m_data_src = model_net_method_get_edata(DRAGONFLY_CUSTOM, msg);
1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328
    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);
    }

    cur_chunk->msg.chunk_id = i;
    cur_chunk->msg.origin_router_id = s->router_id;
1329
    append_to_terminal_custom_message_list(s->terminal_msgs, s->terminal_msgs_tail,
1330 1331 1332 1333 1334 1335 1336 1337 1338
      0, cur_chunk);
    s->terminal_length += s->params->chunk_size;
  }

  if(s->terminal_length < 2 * s->params->cn_vc_size) {
    model_net_method_idle_event(nic_ts, 0, lp);
  } else {
    bf->c11 = 1;
    s->issueIdle = 1;
1339 1340 1341 1342 1343 1344 1345 1346

      if(s->last_buf_full[0] == 0.0)
      {
        bf->c8 = 1;
        msg->saved_busy_time = s->last_buf_full[0];
        /* TODO: Assumes a single vc from terminal to router */
        s->last_buf_full[0] = tw_now(lp);
      }
1347 1348 1349 1350 1351
  }
  
  if(s->in_send_loop == 0) {
    bf->c5 = 1;
    ts = codes_local_latency(lp);
1352
    terminal_custom_message *m;
1353
    tw_event* e = model_net_method_event_new(lp->gid, ts, lp, DRAGONFLY_CUSTOM, 
1354 1355 1356 1357 1358 1359 1360
      (void**)&m, NULL);
    m->type = T_SEND;
    m->magic = terminal_magic_num;
    s->in_send_loop = 1;
    tw_event_send(e);
  }

1361
  total_event_size = model_net_get_msg_sz(DRAGONFLY_CUSTOM) + 
1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
      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)
	  stat->max_event_size = total_event_size;

  return;
}

1374
static void packet_send_rc(terminal_state * s, tw_bf * bf, terminal_custom_message * msg,
1375 1376
        tw_lp * lp)
{
1377 1378 1379
      if(bf->c10)
         s->last_buf_full[0] = msg->saved_busy_time;
      
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393
      if(bf->c1) {
        s->in_send_loop = 1;
        return;
      }
      
      tw_rand_reverse_unif(lp->rng);
      s->terminal_available_time = msg->saved_available_time;
      if(bf->c2) {
        codes_local_latency_reverse(lp);
      }
     
      s->terminal_length += s->params->chunk_size;
      s->vc_occupancy[0] -= s->params->chunk_size;

1394
      terminal_custom_message_list* cur_entry = (terminal_custom_message_list *)rc_stack_pop(s->st);
1395

1396
      prepend_to_terminal_custom_message_list(s->terminal_msgs, 
1397 1398 1399 1400 1401 1402 1403
              s->terminal_msgs_tail, 0, cur_entry);
      if(bf->c3) {
        tw_rand_reverse_unif(lp->rng);
      }
      if(bf->c4) {
        s->in_send_loop = 1;
      }
1404
      if(bf->c5)
1405
      {
1406
          tw_rand_reverse_unif(lp->rng);
1407
          s->issueIdle = 1;
1408 1409 1410
          if(bf->c6)
          {
            s->busy_time = msg->saved_total_time;
1411
            s->last_buf_full[0] = msg->saved_busy_time;
1412 1413
            s->busy_time_sample = msg->saved_sample_time;
          }
1414
      }
1415 1416 1417
      return;
}
/* sends the packet from the current dragonfly compute node to the attached router */
1418
static void packet_send(terminal_state * s, tw_bf * bf, terminal_custom_message * msg, 
1419 1420 1421 1422
  tw_lp * lp) {
  
  tw_stime ts;
  tw_event *e;
1423
  terminal_custom_message *m;
1424 1425
  tw_lpid router_id;

1426
  terminal_custom_message_list* cur_entry = s->terminal_msgs[0];
1427

1428 1429 1430 1431 1432 1433 1434 1435 1436 1437
  if(s->vc_occupancy[0] + s->params->chunk_size > s->params->cn_vc_size)
  {
      if(s->last_buf_full[0] == 0.0)
      {
        bf->c10 = 1;
        msg->saved_busy_time = s->last_buf_full[0];
        s->last_buf_full[0] = tw_now(lp);
      }
  }

1438 1439 1440 1441 1442 1443 1444 1445
  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;
    return;
  }

  uint64_t num_chunks = cur_entry->msg.packet_size/s->params->chunk_size;
1446
  if(cur_entry->msg.packet_size < s->params->chunk_size)
1447 1448 1449
    num_chunks++;

  tw_stime delay = s->params->cn_delay;
1450
  if((cur_entry->msg.packet_size < s->params->chunk_size) && (cur_entry->msg.chunk_id == num_chunks - 1))
1451 1452 1453 1454 1455 1456 1457
       delay = bytes_to_ns(cur_entry->msg.packet_size % s->params->chunk_size, s->params->cn_bandwidth); 

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

1458
  ts = s->terminal_available_time - tw_now(lp);
1459 1460
  codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id, NULL,
      &mapping_type_id, NULL, &mapping_rep_id, &mapping_offset);
1461
  codes_mapping_get_lp_id(lp_group_name, LP_CONFIG_NM_ROUT, NULL, 0,
1462
      s->router_id / num_routers_per_mgrp, s->router_id % num_routers_per_mgrp, &router_id);
1463 1464 1465

//  if(s->router_id == 1)
//   printf("\n Local router id %d global router id %d ", s->router_id, router_id);
1466 1467
  // we are sending an event to the router, so no method_event here
  void * remote_event;
1468
  e = model_net_method_event_new(router_id, ts, lp,
1469
          DRAGONFLY_CUSTOM_ROUTER, (void**)&m, &remote_event);
1470
  memcpy(m, &cur_entry->msg, sizeof(terminal_custom_message));
1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
  if (m->remote_event_size_bytes){
    memcpy(remote_event, cur_entry->event_data, m->remote_event_size_bytes);
  }

  m->type = R_ARRIVE;
  m->src_terminal_id = lp->gid;
  m->vc_index = 0;
  m->last_hop = TERMINAL;
  m->magic = router_magic_num;
  m->path_type = -1;
  m->local_event_size_bytes = 0;
1482
  m->intm_rtr_id = -1;
1483 1484 1485
  tw_event_send(e);


1486 1487 1488 1489 1490
  if(cur_entry->msg.packet_ID == LLU(TRACK_PKT) && lp->gid == T_ID)
    printf("\n Packet %llu generated at terminal %d dest %llu size %llu num chunks %llu router-id %d %d", 
            cur_entry->msg.packet_ID, s->terminal_id, LLU(cur_entry->msg.dest_terminal_id),
            LLU(cur_entry->msg.packet_size), LLU(num_chunks), s->router_id, router_id);

1491 1492 1493
  if(cur_entry->msg.chunk_id == num_chunks - 1 && 
      (cur_entry->msg.local_event_size_bytes > 0)) {
    bf->c2 = 1;
1494 1495
    tw_stime local_ts = codes_local_latency(lp); 
    tw_event *e_new = tw_event_new(cur_entry->msg.sender_lp, local_ts, lp);
1496 1497 1498 1499 1500 1501 1502 1503
    void * 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->vc_occupancy[0] += s->params->chunk_size;
  cur_entry = return_head(s->terminal_msgs, s->terminal_msgs_tail, 0); 
1504
  rc_stack_push(lp, cur_entry, delete_terminal_custom_message_list, s->st);
1505 1506 1507 1508 1509 1510 1511 1512
  s->terminal_length -= s->params->chunk_size;

  cur_entry = s->terminal_msgs[0];

  /* if there is another packet inline then schedule another send event */
  if(cur_entry != NULL &&
    s->vc_occupancy[0] + s->params->chunk_size <= s->params->cn_vc_size) {
    bf->c3 = 1;
1513
    terminal_custom_message *m_new;
1514
    ts += tw_rand_unif(lp->rng);
1515
    e = model_net_method_event_new(lp->gid, ts, lp, DRAGONFLY_CUSTOM, 
1516 1517 1518 1519 1520 1521 1522 1523 1524
      (void**)&m_new, NULL);
    m_new->type = T_SEND;
    m_new->magic = terminal_magic_num;
    tw_event_send(e);
  } else {
      /* If not then the LP will wait for another credit or packet generation */
    bf->c4 = 1;
    s->in_send_loop = 0;
  }
1525
  if(s->issueIdle) {
1526 1527
    bf->c5 = 1;
    s->issueIdle = 0;
1528 1529 1530
    ts += tw_rand_unif(lp->rng);
    model_net_method_idle_event(ts, 0, lp);
   
1531
    if(s->last_buf_full[0] > 0.0)
1532 1533 1534
    {
        bf->c6 = 1;
        msg->saved_total_time = s->busy_time;
1535
        msg->saved_busy_time = s->last_buf_full[0];
1536 1537
        msg->saved_sample_time = s->busy_time_sample;

1538 1539 1540
        s->busy_time += (tw_now(lp) - s->last_buf_full[0]);
        s->busy_time_sample += (tw_now(lp) - s->last_buf_full[0]);
        s->last_buf_full[0] = 0.0;
1541
    }
1542
  }