dragonfly-plus.C 148 KB
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/*
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 * Neil McGlohon - Rensselaer Polytechnic Institute
 * Original Dragonfly-Custom Base Code by Misbah Mubarak - Argonne National Labs
 *
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 * Copyright (C) 2017 Rensselaer Polytechnic Institute.
 * See COPYRIGHT notice in top-level directory.
 *
 */

#include <ross.h>

#define DEBUG_LP 892
#include <map>
#include <set>
#include <vector>
#include "codes/codes.h"
#include "codes/codes_mapping.h"
#include "codes/jenkins-hash.h"
#include "codes/model-net-lp.h"
#include "codes/model-net-method.h"
#include "codes/model-net.h"
#include "codes/net/dragonfly-plus.h"
#include "codes/quickhash.h"
#include "codes/rc-stack.h"
#include "sys/file.h"

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#include "codes/connection-manager.h"

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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 T_ID 1
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#define CREDIT_SIZE 8
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#define DFLY_HASH_TABLE_SIZE 40000
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#define SHOW_ADAPTIVE_STATS 1
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// debugging parameters
#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

#define LP_CONFIG_NM_TERM (model_net_lp_config_names[DRAGONFLY_PLUS])
#define LP_METHOD_NM_TERM (model_net_method_names[DRAGONFLY_PLUS])
#define LP_CONFIG_NM_ROUT (model_net_lp_config_names[DRAGONFLY_PLUS_ROUTER])
#define LP_METHOD_NM_ROUT (model_net_method_names[DRAGONFLY_PLUS_ROUTER])

using namespace std;
struct Link
{
    int offset;
};
struct bLink
{
    int offset, dest;
};

/*MM: Maintains a list of routers connecting the source and destination groups */
static vector< vector< vector< int > > > connectionList;

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static vector< ConnectionManager > connManagerList;

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struct IntraGroupLink
{
    int src, dest;
};

struct InterGroupLink
{
    int src, dest;
};

#ifdef ENABLE_CORTEX
/* This structure is defined at the end of the file */
extern "C" {
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//extern cortex_topology dragonfly_plus_cortex_topology;
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}
#endif

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;

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_plus_param dragonfly_plus_param;
/* annotation-specific parameters (unannotated entry occurs at the
 * last index) */
static uint64_t num_params = 0;
static dragonfly_plus_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 */
static int router_magic_num = 0;

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

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static long num_local_packets_sr = 0;
static long num_local_packets_sg = 0;
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static long num_remote_packets = 0;

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/* Hops within a group */
static int num_intra_nonmin_hops = 4;
static int num_intra_min_hops = 2;

static FILE *dragonfly_log = NULL;

static int sample_bytes_written = 0;
static int sample_rtr_bytes_written = 0;

static char cn_sample_file[MAX_NAME_LENGTH];
static char router_sample_file[MAX_NAME_LENGTH];

// don't do overhead here - job of MPI layer
static tw_stime mpi_soft_overhead = 0;

typedef struct terminal_plus_message_list terminal_plus_message_list;
struct terminal_plus_message_list
{
    terminal_plus_message msg;
    char *event_data;
    terminal_plus_message_list *next;
    terminal_plus_message_list *prev;
};

static void init_terminal_plus_message_list(terminal_plus_message_list *thisO, terminal_plus_message *inmsg)
{
    thisO->msg = *inmsg;
    thisO->event_data = NULL;
    thisO->next = NULL;
    thisO->prev = NULL;
}

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

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template <class InputIterator1, class InputIterator2, class OutputIterator>
OutputIterator _set_difference (InputIterator1 first1, InputIterator1 last1,
                                 InputIterator2 first2, InputIterator2 last2,
                                 OutputIterator result)
{
  while (first1!=last1 && first2!=last2)
  {
    if (*first1<*first2) { *result = *first1; ++result; ++first1; }
    else if (*first2<*first1) ++first2;
    else { ++first1; ++first2; }
  }
  return std::copy(first1,last1,result);
}

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template <class T>
vector< T > set_difference_vectors(vector<T> vec1, vector<T> vec2)
{
    int max_len = std::max(vec1.size(), vec2.size());
    vector< T > retVec(max_len);
    typename vector< T >::iterator retIt;

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    retIt = _set_difference(vec1.begin(), vec1.end(), vec2.begin(), vec2.end(), retVec.begin());
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    retVec.resize(retIt - retVec.begin());

    return retVec;
}


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struct dragonfly_plus_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 intra_grp_radix;

    // dfp params start
    int num_level_chans;   // number of channels between levels of the group(?)
    int num_router_spine;  // number of spine routers (top level)
    int num_router_leaf;   // number of leaf routers (bottom level)
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    int adaptive_threshold;   // predefined queue length threshold T before a packet is routed through a lower priority queue
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    bool source_leaf_consider_nonmin;
    bool int_spine_consider_min;
    bool dest_spine_consider_nonmin;
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    bool dest_spine_consider_global_nonmin;
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    int max_hops_notify; //maximum number of hops allowed before notifying via printout

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    long max_port_score;   // maximum score that can be given to any port during route scoring
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    // dfp params end

    int num_groups;
    int radix;
    int total_routers;
    int total_terminals;
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    int num_global_connections;
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    double cn_delay;
    double local_delay;
    double global_delay;
    double credit_delay;
    double router_delay;
};

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static const dragonfly_plus_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;
    terminal_plus_message_list **terminal_msgs;
    terminal_plus_message_list **terminal_msgs_tail;
    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_plus_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;

    tw_stime max_latency;
    tw_stime min_latency;

    char output_buf[4096];
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    char output_buf2[4096];
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    /* 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;

    /* for logging forward and reverse events */
    long fwd_events;
    long rev_events;
};

/* terminal event type (1-4) */
typedef enum event_t {
    T_GENERATE = 1,
    T_ARRIVE,
    T_SEND,
    T_BUFFER,
    R_SEND,
    R_ARRIVE,
    R_BUFFER,
} event_t;

/* whether the last hop of a packet was global, local or a terminal */
enum last_hop
{
    GLOBAL = 1,
    LOCAL,
    TERMINAL,
};

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// Used to denote whether a connection is one that would allow a packet to continue along a minimal path or not
// Specifically used to clearly pass whether a connection is a minimal one through to the connection scoring function
typedef enum conn_minimality_t
{
    C_MIN = 1,
    C_NONMIN
} conn_minimality_t;

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typedef enum routing_alg_t
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{
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    MINIMAL = 1, //will always follow the minimal route from host to host
    NON_MINIMAL_SPINE, //will always route through an intermediate spine in an intermediate group for inter group traffic
    NON_MINIMAL_LEAF, //will always route through an intermediate leaf in an intermediate group for inter group traffic
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    PROG_ADAPTIVE, //Choose between Minimal, Nonmin spine, and nonmin leaf at the router level based on own congestion
    FULLY_PROG_ADAPTIVE, //OTFA with ARNs
    NON_MINIMAL //A catch all for adaptive routing to determine if a path had deviated from minimal - not an algorithm!!!!!
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} routing_alg_t;

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typedef enum route_scoring_metric_t
{
    ALPHA = 1, //Count queue lengths and pending messages for a port
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    BETA, //Expected Hops to Destination * (Count queue lengths and pending messages) for a port
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    GAMMA,
    DELTA
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} route_scoring_metric_t;

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typedef enum route_scoring_preference_t
{
    LOWER = 1,
    HIGHER
} route_scoring_preference_t;

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bool isRoutingAdaptive(int alg)
{
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    if (alg == PROG_ADAPTIVE || alg == FULLY_PROG_ADAPTIVE)
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        return true;
    else
        return false;
}

bool isRoutingMinimal(int alg)
{
    if (alg == MINIMAL)
        return true;
    else
        return false;
}
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bool isRoutingNonminimalExplicit(int alg)
{
    if (alg == NON_MINIMAL_LEAF || alg == NON_MINIMAL_SPINE)
        return true;
    else
        return false;
}

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enum LINK_TYPE
{
    GREEN,
    BLACK,
};

enum router_type
{
    SPINE = 1,
    LEAF
};

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typedef enum intermediate_router_t
{
    INT_CHOICE_LEAF = 1,
    INT_CHOICE_SPINE,
    INT_CHOICE_BOTH
} intermediate_router_t;

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static map< int, router_type> router_type_map;


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struct router_state
{
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    int router_id;
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    int group_id;
    int op_arr_size;
    int max_arr_size;

    router_type dfp_router_type;  // Enum to specify whether this router is a spine or a leaf

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    ConnectionManager *connMan;
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    int *gc_usage;
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    int *global_channel;

    tw_stime *next_output_available_time;
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    tw_stime *last_buf_full;
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    tw_stime *busy_time;
    tw_stime *busy_time_sample;

    terminal_plus_message_list ***pending_msgs;
    terminal_plus_message_list ***pending_msgs_tail;
    terminal_plus_message_list ***queued_msgs;
    terminal_plus_message_list ***queued_msgs_tail;
    int *in_send_loop;
    int *queued_count;
    struct rc_stack *st;

    int **vc_occupancy;
    int64_t *link_traffic;
    int64_t *link_traffic_sample;

    const char *anno;
    const dragonfly_plus_param *params;

    char output_buf[4096];
    char output_buf2[4096];

    struct dfly_router_sample *rsamples;

    long fwd_events;
    long rev_events;
};

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int dragonfly_plus_get_assigned_router_id(int terminal_id, const dragonfly_plus_param *p);

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static short routing = MINIMAL;
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static short scoring = ALPHA;
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static short scoring_preference = LOWER;
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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;
    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);
    key = key * 21;
    key = ~key ^ (tmp->sender_id >> 4);
    key = key * tmp->sender_id;
    return (int)(key & (table_size - 1));*/
}

/* 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 */
int dragonfly_plus_get_msg_sz(void)
{
    return sizeof(terminal_plus_message);
}

static void free_tmp(void *ptr)
{
    struct dfly_qhash_entry *dfly = (dfly_qhash_entry *) ptr;
    if (dfly->remote_event_data)
        free(dfly->remote_event_data);

    if (dfly)
        free(dfly);
}

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

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

static terminal_plus_message_list *return_head(terminal_plus_message_list **thisq,
                                               terminal_plus_message_list **thistail,
                                               int index)
{
    terminal_plus_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;
}

static terminal_plus_message_list *return_tail(terminal_plus_message_list **thisq,
                                               terminal_plus_message_list **thistail,
                                               int index)
{
    terminal_plus_message_list *tail = thistail[index];
    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_plus_print_params(const dragonfly_plus_param *p)
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{
    int myRank;
    MPI_Comm_rank(MPI_COMM_CODES, &myRank);
    if (!myRank) { 
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        printf("\n------------------ Dragonfly Plus Parameters ---------\n");
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        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_level_chans =             %d\n",p->num_level_chans);
        printf("\tnum_router_spine =            %d\n",p->num_router_spine);
        printf("\tnum_router_leaf =             %d\n",p->num_router_leaf);
        printf("\tmax_port_score =              %ld\n",p->max_port_score);
        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_connections =      %d\n",p->num_global_connections);
        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("\tscoring =                     %d\n",scoring);
        printf("\tadaptive_threshold =          %d\n",p->adaptive_threshold);
        printf("\trouting =                     %d\n",routing);
        printf("\tsource_leaf_consider_nonmin = %s\n", (p->source_leaf_consider_nonmin ? "true" : "false"));
        printf("\tint_spine_consider_min =      %s\n", (p->int_spine_consider_min ? "true" : "false"));
        printf("\tdest_spine_consider_nonmin =  %s\n", (p->dest_spine_consider_nonmin ? "true" : "false"));
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        printf("\tdest_spine_consider_gnonmin = %s\n", (p->dest_spine_consider_global_nonmin ? "true" : "false"));
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        printf("\tmax hops notification =       %d\n",p->max_hops_notify);
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        printf("------------------------------------------------------\n\n");
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    }
}

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static void dragonfly_read_config(const char *anno, dragonfly_plus_param *params)
{
    /*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;

    // shorthand
    dragonfly_plus_param *p = params;
    int myRank;
    MPI_Comm_rank(MPI_COMM_CODES, &myRank);

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

    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);
    }

    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);
    }

    rc = configuration_get_value_double(&config, "PARAMS", "router_delay", anno, &p->router_delay);
    if (rc) {
        p->router_delay = 100;
    }

    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;
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    else if (strcmp(routing_str, "non-minimal-spine") == 0)
        routing = NON_MINIMAL_SPINE;
    else if (strcmp(routing_str, "non-minimal-leaf") == 0)
        routing = NON_MINIMAL_LEAF;
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    else if (strcmp(routing_str, "prog-adaptive") == 0)
        routing = PROG_ADAPTIVE;
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    else if (strcmp(routing_str, "fully-prog-adaptive") == 0)
        routing = FULLY_PROG_ADAPTIVE;
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    else {
        fprintf(stderr, "No routing protocol specified, setting to minimal routing\n");
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        routing = MINIMAL;
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    }

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    rc = configuration_get_value_int(&config, "PARAMS", "notification_on_hops_greater_than", anno, &p->max_hops_notify);
    if (rc) {
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        printf("Maximum hops for notifying not specified, setting to INT MAX\n");
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        p->max_hops_notify = INT_MAX;
    }

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    int src_leaf_cons_choice;
    rc = configuration_get_value_int(&config, "PARAMS", "source_leaf_consider_nonmin", anno, &src_leaf_cons_choice);
    if (rc) {
        printf("Source leaf consideration of nonmin ports not specified. Defaulting to True\n");
        p->source_leaf_consider_nonmin = true;
    }
    else if (src_leaf_cons_choice == 1) {
        p->source_leaf_consider_nonmin = true;
    }
    else
        p->source_leaf_consider_nonmin = false;


    int int_spn_cons_choice;
    rc = configuration_get_value_int(&config, "PARAMS", "int_spine_consider_min", anno, &int_spn_cons_choice);
    if (rc) {
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        printf("Int spine consideration of min ports not specified. Defaulting to False\n");
        p->int_spine_consider_min = false;
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    }
    else if (int_spn_cons_choice == 1) {
        p->int_spine_consider_min = true;
    }
    else
        p->int_spine_consider_min = false;

    int dst_spn_cons_choice;
    rc = configuration_get_value_int(&config, "PARAMS", "dest_spine_consider_nonmin", anno, &dst_spn_cons_choice);
    if (rc) {
        printf("Dest spine consideration of nonmin ports not specified. Defaulting to False");
        p->dest_spine_consider_nonmin = false;
    }
    else if (dst_spn_cons_choice == 1) {
        p->dest_spine_consider_nonmin = true;
    }
    else
        p->dest_spine_consider_nonmin = false;

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    int dst_spn_gcons_choice;
    rc = configuration_get_value_int(&config, "PARAMS", "dest_spine_consider_global_nonmin", anno, &dst_spn_gcons_choice);
    if (rc) {
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        printf("Dest spine consideration of global nonmin ports not specified. Defaulting to True");
        p->dest_spine_consider_global_nonmin = true;
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    }
    else if (dst_spn_gcons_choice == 1) {
        p->dest_spine_consider_global_nonmin = true;
    }
    else
        p->dest_spine_consider_global_nonmin = false;


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    /* MM: This should be 2 for dragonfly plus*/
    p->num_vcs = 2;

    rc = configuration_get_value_int(&config, "PARAMS", "num_groups", anno, &p->num_groups);
    if (rc) {
        printf("Number of groups not specified. Aborting");
        MPI_Abort(MPI_COMM_CODES, 1);
    }
    rc = configuration_get_value_int(&config, "PARAMS", "num_router_spine", anno, &p->num_router_spine);
    if (rc) {
        p->num_router_spine = 1;
    }
    rc = configuration_get_value_int(&config, "PARAMS", "num_router_leaf", anno, &p->num_router_leaf);
    if (rc) {
        p->num_router_leaf = 1;
    }
    rc = configuration_get_value_int(&config, "PARAMS", "num_level_chans", anno, &p->num_level_chans);
    if (rc) {
        printf("\n Number of links connecting chassis not specified, setting to default value 1 ");
        p->num_level_chans = 1;
    }

    p->num_routers = p->num_router_spine + p->num_router_leaf;  // num routers per group
    p->intra_grp_radix = (p->num_routers / 2) * p->num_level_chans;

    rc = configuration_get_value_int(&config, "PARAMS", "num_cns_per_router", anno, &p->num_cn);
    if (rc) {
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        printf("\n Number of cns per router not specified, setting to %d ", 4);
        p->num_cn = 4;
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    }

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    rc = configuration_get_value_int(&config, "PARAMS", "num_global_connections", anno, &p->num_global_connections);
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    if (rc) {
        printf("\n Number of global channels per router not specified, setting to 10 ");
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        p->num_global_connections = 10;
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    }
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    p->radix = p->intra_grp_radix + p->num_global_connections +
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               p->num_cn;  // TODO this may not be sufficient, radix isn't same for leaf and spine routers
    p->total_routers = p->num_groups * p->num_routers;
    p->total_terminals = (p->num_groups * p->num_router_leaf) * p->num_cn;

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    char scoring_str[MAX_NAME_LENGTH];
    configuration_get_value(&config, "PARAMS", "route_scoring_metric", anno, scoring_str, MAX_NAME_LENGTH);
    if (strcmp(scoring_str, "alpha") == 0) {
        scoring = ALPHA;
        scoring_preference = LOWER;
    }
    else if (strcmp(scoring_str, "beta") == 0) {
        scoring = BETA;
        scoring_preference = LOWER;
    }
    else if (strcmp(scoring_str, "gamma") == 0) {
        scoring = GAMMA;
        scoring_preference = HIGHER;
    }
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    else if (strcmp(scoring_str, "delta") == 0) {
        scoring = DELTA;
        scoring_preference = LOWER;
    }
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    else {
        fprintf(stderr, "No route scoring protocol specified, setting to alpha scoring\n");
        scoring = ALPHA;
        scoring_preference = LOWER;
    }

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    rc = configuration_get_value_int(&config, "PARAMS", "adaptive_threshold", anno, &p->adaptive_threshold);
    if (rc) {
        printf("Adaptive Minimal Routing Threshold not specified: setting to default = 0. (Will consider minimal and nonminimal routes based on scoring metric alone)");
        p->adaptive_threshold = 0;
    }
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    int largest_vc_size = 0;
    if (p->local_vc_size > largest_vc_size)
        largest_vc_size = p->local_vc_size;
    if (p->global_vc_size > largest_vc_size)
        largest_vc_size = p->global_vc_size;
    if (p->cn_vc_size > largest_vc_size)
        largest_vc_size = p->cn_vc_size;

    p->max_port_score = (p->num_vcs * largest_vc_size) + largest_vc_size; //The maximum score that a port can get during the scoring metrics.

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    // read intra group connections, store from a router's perspective
    // all links to the same router form a vector
    char intraFile[MAX_NAME_LENGTH];
    configuration_get_value(&config, "PARAMS", "intra-group-connections", anno, intraFile, MAX_NAME_LENGTH);
    if (strlen(intraFile) <= 0) {
        tw_error(TW_LOC, "Intra group connections file not specified. Aborting");
    }
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    //setup Connection Managers for each router
    for(int i = 0; i < p->total_routers; i++)
    {
        int src_id_global = i;
        int src_id_local = i % p->num_routers;
        int src_group = i / p->num_routers;

        ConnectionManager conman = ConnectionManager(src_id_local, src_id_global, src_group, p->intra_grp_radix, p->num_global_connections, p->num_cn, p->num_routers);
        connManagerList.push_back(conman);
    }

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    FILE *groupFile = fopen(intraFile, "rb");
    if (!groupFile)
        tw_error(TW_LOC, "intra-group file not found ");

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    IntraGroupLink newLink;
    while (fread(&newLink, sizeof(IntraGroupLink), 1, groupFile) != 0) {
        int src_id_local = newLink.src;
        int dest_id_local = newLink.dest;
        for(int i = 0; i < p->total_routers; i++)
        {
            int group_id = i/p->num_routers;
            if (i % p->num_routers == src_id_local)
            {
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                int dest_id_global = group_id * p->num_routers + dest_id_local;
                connManagerList[i].add_connection(dest_id_global, CONN_LOCAL);
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            }
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        }
    }
    fclose(groupFile);

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    //terminal assignment!
    for(int i = 0; i < p->total_terminals; i++)
    {
        int assigned_router_id = dragonfly_plus_get_assigned_router_id(i, p);
        int assigned_group_id = assigned_router_id / p->num_routers;
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        connManagerList[assigned_router_id].add_connection(i, CONN_TERMINAL);
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    }
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    // 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];
    configuration_get_value(&config, "PARAMS", "inter-group-connections", anno, interFile, MAX_NAME_LENGTH);
    if (strlen(interFile) <= 0) {
        tw_error(TW_LOC, "Inter group connections file not specified. Aborting");
    }
    FILE *systemFile = fopen(interFile, "rb");
    if (!myRank) {
        printf("Reading inter-group connectivity file: %s\n", interFile);
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        printf("\nTotal routers: %d; total groups: %d \n", p->total_routers, p->num_groups);
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    }

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    connectionList.resize(p->num_groups);
    for (int g = 0; g < connectionList.size(); g++) {
        connectionList[g].resize(p->num_groups);
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    }

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    InterGroupLink newInterLink;
    while (fread(&newInterLink, sizeof(InterGroupLink), 1, systemFile) != 0) {
        int src_id_global = newInterLink.src;
        int src_group_id = src_id_global / p->num_routers;
        int dest_id_global = newInterLink.dest;
        int dest_group_id = dest_id_global / p->num_routers;
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        // printf("[%d -> %d]\n",src_id_global, dest_id_global);
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        connManagerList[src_id_global].add_connection(dest_id_global, CONN_GLOBAL);
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        int r;
        for (r = 0; r < connectionList[src_group_id][dest_group_id].size(); r++) {
            if (connectionList[src_group_id][dest_group_id][r] == newInterLink.src)
                break;
        }
        if (r == connectionList[src_group_id][dest_group_id].size()) {
            connectionList[src_group_id][dest_group_id].push_back(newInterLink.src);
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        }
    }
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    if (DUMP_CONNECTIONS)
    {
        if (!myRank) {
            for(int i=0; i < connManagerList.size(); i++)
            {
                connManagerList[i].print_connections();
            }
        }
    }
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    for(int i = 0; i < p->total_routers; i++){
        int loc_id = i % p->num_routers;
        if (loc_id < p->num_router_leaf)
            router_type_map[i] = LEAF;
        else
            router_type_map[i] = SPINE;
    }

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    if (!myRank) {
        printf("\n Total nodes %d routers %d groups %d routers per group %d radix %d\n",
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               p->num_cn * p->num_router_leaf * p->num_groups, p->total_routers, p->num_groups, p->num_routers, p->radix);
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    }

    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);
    p->credit_delay = bytes_to_ns(CREDIT_SIZE, p->local_bandwidth);  // assume 8 bytes packet
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    if (PRINT_CONFIG)
        dragonfly_plus_print_params(p);
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    stored_params = p;
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}

void dragonfly_plus_configure()
{
    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);
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    all_params = (dragonfly_plus_param *) calloc(num_params, sizeof(*all_params));
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    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]);
    }
#ifdef ENABLE_CORTEX
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//    model_net_topology = dragonfly_plus_cortex_topology;
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#endif
}

/* report dragonfly statistics like average and maximum packet latency, average number of hops traversed */
void dragonfly_plus_report_stats()
{
    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;
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    long total_local_packets_sr, total_local_packets_sg, total_remote_packets;
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    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);

    MPI_Reduce(&packet_gen, &total_gen, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
    MPI_Reduce(&packet_fin, &total_fin, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
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    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);
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    MPI_Reduce( &num_remote_packets, &total_remote_packets, 1, MPI_LONG, MPI_SUM, 0, MPI_COMM_CODES);
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    if(isRoutingAdaptive(routing) || SHOW_ADAPTIVE_STATS) {
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        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);
    }
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    /* print statistics */
    if (!g_tw_mynode) {
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        if (PRINT_CONFIG) 
            dragonfly_plus_print_params(stored_params);


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        printf(
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            " Average number of router 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",
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            (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);
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        if(isRoutingAdaptive(routing) || SHOW_ADAPTIVE_STATS) {
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            printf("\n ADAPTIVE ROUTING STATS: %d chunks routed minimally %d chunks routed non-minimally - completed packets: %lld \n",
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                total_minimal_packets, total_nonmin_packets, total_finished_chunks);
        }
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      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);
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    }
    return;
}

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int dragonfly_plus_get_router_type(int router_id, const dragonfly_plus_param *p)
{
    int num_groups = p->num_groups;
    int num_routers = p->num_routers;
    int num_router_leaf = p->num_router_leaf;

    int group_id = router_id / num_groups;
    int router_local_id = router_id % num_routers;

    if (router_local_id > num_router_leaf)
        return SPINE;
    else
        return LEAF;
}

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/* get the router id associated with a given terminal id */
int dragonfly_plus_get_assigned_router_id(int terminal_id, const dragonfly_plus_param *p)
{
    // currently supports symmetrical bipartite spine/leaf router configurations
    // first half of routers in a given group are leafs which have terminals
    // second half of routers in a given group are spines which have no terminals

    int num_groups = p->num_groups;            // number of groups of routers in the network
    int num_routers = p->num_routers;          // num routers per group
    int num_router_leaf = p->num_router_leaf;  // num leaf routers per group
    int num_cn = p->num_cn;                    // num compute nodes per leaf router

    int group_id = terminal_id / (num_router_leaf * num_cn);
    int local_router_id = terminal_id % (num_router_leaf * num_cn) / num_router_leaf;

    int router_id = (group_id * num_routers) + local_router_id;
    // printf("Terminal %d: assigned to group %d, local router id %d, global router id %d\n",terminal_id,
    // group_id, local_router_id, router_id);

    return router_id;
}

/* initialize a dragonfly compute node terminal */
void terminal_plus_init(terminal_state *s, tw_lp *lp)
{
    // printf("%d: Terminal Init()\n",lp->gid);
    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);

    s->terminal_id = codes_mapping_get_lp_relative_id(lp->gid, 0, 0);
    s->router_id = dragonfly_plus_get_assigned_router_id(s->terminal_id, s->params);
    //    s->router_id=(int)s->terminal_id / (s->params->num_cn); //TODO I think this is where the router that
    //    the terminal is connected to is specified
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    // printf("%d gid is TERMINAL %d with assigned router %d\n",lp->gid,s->terminal_id,s->router_id);
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    s->terminal_available_time = 0.0;
    s->packet_counter = 0;
    s->min_latency = INT_MAX;
    s->max_latency = 0;

    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;
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    s->vc_occupancy = (int *) calloc(s->num_vcs, sizeof(int));
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    s->last_buf_full = 0.0;
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    for (i = 0; i < s->num_vcs; i++) {
        s->vc_occupancy[i] = 0;
    }


    s->rank_tbl = NULL;
    s->terminal_msgs =
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        (terminal_plus_message_list **) calloc(s->num_vcs, sizeof(terminal_plus_message_list *));
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    s->terminal_msgs_tail =
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        (terminal_plus_message_list **) calloc(s->num_vcs, sizeof(terminal_plus_message_list *));
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    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 */
void router_plus_setup(router_state *r, tw_lp *lp)
{
    // printf("%d: Router Init()\n",lp->gid);

    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_plus_param *p = r->params;

    num_routers_per_mgrp =
        codes_mapping_get_lp_count(lp_group_name, 1, "modelnet_dragonfly_plus_router", 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);

    r->router_id = codes_mapping_get_lp_relative_id(lp->gid, 0, 0);
    r->group_id = r->router_id / p->num_routers;

    // printf("\n Local router id %d global id %d ", r->router_id, lp->gid);

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

    // Determine if router is a spine or a leaf
    int intra_group_id = r->router_id % p->num_routers;
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    if (intra_group_id >= (p->num_routers / 2)) { //TODO this assumes symmetric spine and leafs
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        r->dfp_router_type = SPINE;
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        assert(router_type_map[r->router_id] == SPINE);
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        // printf("%lu: %i is a SPINE\n",lp->gid, r->router_id);
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    }
    else {
        r->dfp_router_type = LEAF;
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        assert(router_type_map[r->router_id] == LEAF);
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        // printf("%lu: %i is a LEAF\n",lp->gid, r->router_id);
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    }

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    r->connMan = &connManagerList[r->router_id];
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    r->gc_usage = (int *) calloc(p->num_global_connections, sizeof(int));

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    r->global_channel = (int *) calloc(p->num_global_connections, sizeof(int));
    r->next_output_available_time = (tw_stime *) calloc(p->radix, sizeof(tw_stime));
    r->link_traffic = (int64_t *) calloc(p->radix, sizeof(int64_t));
    r->link_traffic_sample = (int64_t *) calloc(p->radix, sizeof(int64_t));
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    r->vc_occupancy = (int **) calloc(p->radix, sizeof(int *));
    r->in_send_loop = (int *) calloc(p->radix, sizeof(int));
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    r->pending_msgs =
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        (terminal_plus_message_list ***) calloc(p->radix, sizeof(terminal_plus_message_list **));
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    r->pending_msgs_tail =
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        (terminal_plus_message_list ***) calloc(p->radix, sizeof(terminal_plus_message_list **));
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    r->queued_msgs =
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        (terminal_plus_message_list ***) calloc(p->radix, sizeof(terminal_plus_message_list **));
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    r->queued_msgs_tail =
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        (terminal_plus_message_list ***) calloc(p->radix, sizeof(terminal_plus_message_list **));
    r->queued_count = (int *) calloc(p->radix, sizeof(int));
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    r->last_buf_full = (tw_stime *) calloc(p->radix, sizeof(tw_stime));
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    r->busy_time = (tw_stime *) calloc(p->radix, sizeof(tw_stime));
    r->busy_time_sample = (tw_stime *) calloc(p->radix, sizeof(tw_stime));
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    rc_stack_create(&r->st);

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    for (int i = 0; i < p->radix; i++) {
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        // 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->link_traffic[i] = 0;
        r->link_traffic_sample[i] = 0;
        r->queued_count[i] = 0;
        r->in_send_loop[i] = 0;
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        r->vc_occupancy[i] = (int *) calloc(p->num_vcs, sizeof(int));
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        r->pending_msgs[i] =
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            (terminal_plus_message_list **) calloc(p->num_vcs, sizeof(terminal_plus_message_list *));
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        r->last_buf_full[i] = 0.0;
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        r->pending_msgs_tail[i] =
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            (terminal_plus_message_list **) calloc(p->num_vcs, sizeof(terminal_plus_message_list *));
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        r->queued_msgs[i] =
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            (terminal_plus_message_list **) calloc(p->num_vcs, sizeof(terminal_plus_message_list *));
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        r->queued_msgs_tail[i] =
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            (terminal_plus_message_list **) calloc(p->num_vcs, sizeof(terminal_plus_message_list *));
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        for (int j = 0; j < p->num_vcs; j++) {
            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;
        }
    }

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    r->connMan->solidify_connections();
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    return;
}

/* MM: These packet events (packet_send, packet_receive etc.) will be used as is, basically, the routing
 * functions will be changed only. */
/* dragonfly packet event , generates a dragonfly packet on the compute node */
static tw_stime dragonfly_plus_packet_event(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;
    terminal_plus_message *msg;
    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, sender, DRAGONFLY_PLUS,
                                       (void **) &msg, (void **) &tmp_ptr);
    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;
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    msg->dfp_dest_terminal_id = codes_mapping_get_lp_relative_id(msg->dest_terminal_id,0,0);
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    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*/
    {
        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;
        }
    }
    // 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 */
static void dragonfly_plus_packet_event_rc(tw_lp *sender)
{
    codes_local_latency_reverse(sender);
    return;
}

/*MM: This will also be used as is. This is meant to sent a credit back to the
 * sending router. */
/*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*/
static void router_credit_send(router_state *s, terminal_plus_message *msg, tw_lp *lp, int sq)
{
    tw_event *buf_e;
    tw_stime ts;
    terminal_plus_message *buf_msg;

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

    const dragonfly_plus_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;
    }
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    else if (msg->last_hop == GLOBAL || msg->last_hop == LOCAL) {
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        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) {
        buf_e = model_net_method_event_new(dest, ts, lp, DRAGONFLY_PLUS, (void **) &buf_msg, NULL);
        buf_msg->magic = terminal_magic_num;
    }
    else {
        buf_e = model_net_method_event_new(dest, ts, lp, DRAGONFLY_PLUS_ROUTER, (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;
}

static void packet_generate_rc(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    s->packet_gen--;
    packet_gen--;
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    s->packet_counter--;
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    tw_rand_reverse_unif(lp->rng);

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

    int i;
    for (i = 0; i < num_chunks; i++) {
        delete_terminal_plus_message_list(return_tail(s->terminal_msgs, 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;
    }
    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 */
static void packet_generate(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    packet_gen++;
    s->packet_gen++;

    tw_stime ts, nic_ts;

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

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

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    int dest_router_id = dragonfly_plus_get_assigned_router_id(msg->dfp_dest_terminal_id, s->params);
Neil McGlohon's avatar
Neil McGlohon committed
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    int dest_grp_id = dest_router_id / s->params->num_routers;
    int src_grp_id = s->router_id / s->params->num_routers;
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    if(src_grp_id == dest_grp_id)
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    {
      if(dest_router_id == s->router_id)
          num_local_packets_sr++;
      else
          num_local_packets_sg++;
    }
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    else
      num_remote_packets++;

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

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

    nic_ts = g_tw_lookahead + (num_chunks * cn_delay) + tw_rand_unif(lp->rng);

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    // msg->packet_ID = lp->gid + g_tw_nlp * s->packet_counter;
    msg->packet_ID = s->packet_counter;
    s->packet_counter++;
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    msg->my_N_hop = 0;
    msg->my_l_hop = 0;
    msg->my_g_hop = 0;

    // if(msg->dest_terminal_id == TRACK)
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    if (msg->packet_ID == LLU(TRACK_PKT) && lp->gid == T_ID)
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        printf("\n Packet %llu generated at terminal %d dest %llu size %llu num chunks %llu ", msg->packet_ID,
               s->terminal_id, LLU(msg->dest_terminal_id), LLU(msg->packet_size), LLU(num_chunks));

    for (int i = 0; i < num_chunks; i++) {
        terminal_plus_message_list *cur_chunk =
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            (terminal_plus_message_list *) calloc(1, sizeof(terminal_plus_message_list));
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        msg->origin_router_id = s->router_id;
        init_terminal_plus_message_list(cur_chunk, msg);

        if (msg->remote_event_size_bytes + msg->local_event_size_bytes > 0) {
            cur_chunk->event_data =
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                (char *) calloc(1, msg->remote_event_size_bytes + msg->local_event_size_bytes);
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        }

        void *m_data_src = model_net_method_get_edata(DRAGONFLY_PLUS, 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);
        }

        cur_chunk->msg.chunk_id = i;
        cur_chunk->msg.origin_router_id = s->router_id;
        append_to_terminal_plus_message_list(s->terminal_msgs, s->terminal_msgs_tail, 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;
    }

    if (s->in_send_loop == 0) {
        bf->c5 = 1;
        ts = codes_local_latency(lp);
        terminal_plus_message *m;
        tw_event *e = model_net_method_event_new(lp->gid, ts, lp, DRAGONFLY_PLUS, (void **) &m, NULL);
        m->type = T_SEND;
        m->magic = terminal_magic_num;
        s->in_send_loop = 1;
        tw_event_send(e);
    }

    total_event_size =
        model_net_get_msg_sz(DRAGONFLY_PLUS) + 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;
}

static void packet_send_rc(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    if (bf->c1) {
        s->in_send_loop = 1;

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        if (bf->c3)
            s->last_buf_full = msg->saved_busy_time;
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        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;
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    // s->packet_counter--;
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    s->vc_occupancy[0] -= s->params->chunk_size;

    terminal_plus_message_list *cur_entry = (terminal_plus_message_list *) rc_stack_pop(s->st);

    prepend_to_terminal_plus_message_list(s->terminal_msgs, s->terminal_msgs_tail, 0, cur_entry);
    if (bf->c3) {
        tw_rand_reverse_unif(lp->rng);
    }
    if (bf->c4) {
        s->in_send_loop = 1;
    }
    if (bf->c5) {
        tw_rand_reverse_unif(lp->rng);
        s->issueIdle = 1;
        if (bf->c6) {
            s->busy_time = msg->saved_total_time;
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            s->last_buf_full = msg->saved_busy_time;
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            s->busy_time_sample = msg->saved_sample_time;
        }
    }
    return;
}
/* sends the packet from the current dragonfly compute node to the attached router */
static void packet_send(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    tw_stime ts;
    tw_event *e;
    terminal_plus_message *m;
    tw_lpid router_id;

    terminal_plus_message_list *cur_entry = s->terminal_msgs[0];
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    bool noEmptyVC = false;
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    if (s->vc_occupancy[0] + s->params->chunk_size > s->params->cn_vc_size) {
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        noEmptyVC = true;
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    }

    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;
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        if(noEmptyVC && !s->last_buf_full)
        {
            bf->c3 = 1;
            msg->saved_busy_time = s->last_buf_full;
            s->last_buf_full = tw_now(lp); 
        }
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        return;
    }

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

    tw_stime delay = s->params->cn_delay;
    if ((cur_entry->msg.packet_size < s->params->chunk_size) && (cur_entry->msg.chunk_id == num_chunks - 1))
        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;

    ts = s->terminal_available_time - tw_now(lp);
    // 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, LP_CONFIG_NM_ROUT, NULL, 1, s->router_id / num_routers_per_mgrp,
                            s->router_id % num_routers_per_mgrp, &router_id);
    //  printf("\n Local router id %d global router id %d ", s->router_id, router_id);
    // we are sending an event to the router, so no method_event here
    void *remote_event;
    e = model_net_method_event_new(router_id, ts, lp, DRAGONFLY_PLUS_ROUTER, (void **) &m, &remote_event);
    memcpy(m, &cur_entry->msg, sizeof(terminal_plus_message));
    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;
    m->intm_rtr_id = -1;
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    m->intm_group_id = -1;
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    m->dfp_upward_channel_flag = 0;
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    tw_event_send(e);


    if (cur_entry->msg.chunk_id == num_chunks - 1 && (cur_entry->msg.local_event_size_bytes > 0)) {
        bf->c2 = 1;
        tw_stime local_ts = codes_local_latency(lp);
        tw_event *e_new = tw_event_new(cur_entry->msg.sender_lp, local_ts, lp);
        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);
    }
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    // s->packet_counter++;
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    s->vc_occupancy[0] += s->params->chunk_size;
    cur_entry = return_head(s->terminal_msgs, s->terminal_msgs_tail, 0);
    rc_stack_push(lp, cur_entry, delete_terminal_plus_message_list, s->st);
    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;
        terminal_plus_message *m_new;
        ts += tw_rand_unif(lp->rng);
        e = model_net_method_event_new(lp->gid, ts, lp, DRAGONFLY_PLUS, (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;
    }
    if (s->issueIdle) {
        bf->c5 = 1;
        s->issueIdle = 0;
        ts += tw_rand_unif(lp->rng);
        model_net_method_idle_event(ts, 0, lp);

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        if (s->last_buf_full > 0.0) {
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            bf->c6 = 1;
            msg->saved_total_time = s->busy_time;
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            msg->saved_busy_time = s->last_buf_full;
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            msg->saved_sample_time = s->busy_time_sample;

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            s->busy_time += (tw_now(lp) - s->last_buf_full);
            s->busy_time_sample += (tw_now(lp) - s->last_buf_full);
            s->last_buf_full = 0.0;
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        }
    }
    return;
}

static void packet_arrive_rc(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    if (bf->c31) {
        s->packet_fin--;
        packet_fin--;
    }
    tw_rand_reverse_unif(lp->rng);
    if (msg->path_type == MINIMAL)
        minimal_count--;
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    else
        nonmin_count--;
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    // if (msg->path_type == NON_MINIMAL)
    //     nonmin_count--;
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    N_finished_chunks--;
    s->finished_chunks--;
    s->fin_chunks_sample--;

    total_hops -= msg->my_N_hop;
    s->total_hops -= msg->my_N_hop;
    s->fin_hops_sample -= msg->my_N_hop;
    dragonfly_total_time = msg->saved_total_time;
    s->fin_chunks_time = msg->saved_sample_time;
    s->total_time = msg->saved_avg_time;

    struct qhash_head *hash_link = NULL;
    struct dfly_qhash_entry *tmp = NULL;

    struct dfly_hash_key key;
    key.message_id = msg->message_id;
    key.sender_id = msg->sender_lp;

    hash_link = qhash_search(s->rank_tbl, &key);
    tmp = qhash_entry(hash_link, struct dfly_qhash_entry, hash_link);

    mn_stats *stat;
    stat = model_net_find_stats(msg->category, s->dragonfly_stats_array);
    stat->recv_time = msg->saved_rcv_time;

    if (bf->c1) {
        stat->recv_count--;
        stat->recv_bytes -= msg->packet_size;
        N_finished_packets--;
        s->finished_packets--;
    }
    if (bf->c3) {
        dragonfly_max_latency = msg->saved_available_time;
    }

    if (bf->c22) {
        s->max_latency = msg->saved_available_time;
    }
    if (bf->c7) {
        // assert(!hash_link);
        if (bf->c8)
            tw_rand_reverse_unif(lp->rng);
        N_finished_msgs--;
        s->finished_msgs--;
        total_msg_sz -= msg->total_size;
        s->total_msg_size -= msg->total_size;
        s->data_size_sample -= msg->total_size;

        struct dfly_qhash_entry *d_entry_pop = (dfly_qhash_entry *) rc_stack_pop(s->st);
        qhash_add(s->rank_tbl, &key, &(d_entry_pop->hash_link));
        s->rank_tbl_pop++;

        if (s->rank_tbl_pop >= DFLY_HASH_TABLE_SIZE)
            tw_error(TW_LOC, "\n Exceeded allocated qhash size, increase hash size in dragonfly model");

        hash_link = &(d_entry_pop->hash_link);
        tmp = d_entry_pop;

        if (bf->c4)
            model_net_event_rc2(lp, &msg->event_rc);
    }

    assert(tmp);
    tmp->num_chunks--;

    if (bf->c5) {
        qhash_del(hash_link);
        free_tmp(tmp);
        s->rank_tbl_pop--;
    }
    return;
}
static void send_remote_event(terminal_state *s, terminal_plus_message *msg, tw_lp *lp, tw_bf *bf,
                              char *event_data, int remote_event_size)
{
    void *tmp_ptr = model_net_method_get_edata(DRAGONFLY_PLUS, msg);
    // tw_stime ts = g_tw_lookahead + bytes_to_ns(msg->remote_event_size_bytes, (1/s->params->cn_bandwidth));
    tw_stime ts = g_tw_lookahead + mpi_soft_overhead + tw_rand_unif(lp->rng);
    if (msg->is_pull) {
        bf->c4 = 1;
        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);
        int net_id = model_net_get_id(LP_METHOD_NM_TERM);

        model_net_set_msg_param(MN_MSG_PARAM_START_TIME, MN_MSG_PARAM_START_TIME_VAL, &(msg->msg_start_time));

        msg->event_rc = model_net_event_mctx(net_id, &mc_src, &mc_dst, msg->category, msg->sender_lp,
                                             msg->pull_size, ts, remote_event_size, tmp_ptr, 0, NULL, lp);
    }
    else {
        tw_event *e = tw_event_new(msg->final_dest_gid, ts, lp);
        void *m_remote = tw_event_data(e);
        memcpy(m_remote, event_data, remote_event_size);
        tw_event_send(e);
    }
    return;
}
/* packet arrives at the destination terminal */
static void packet_arrive(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    // NIC aggregation - should this be a separate function?
    // Trigger an event on receiving server

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    if (msg->my_N_hop > s->params->max_hops_notify)
    {
        printf("Terminal received a packet with %d hops! (Notify on > than %d)\n",msg->my_N_hop, s->params->max_hops_notify);
    }
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    if (!s->rank_tbl)
        s->rank_tbl = qhash_init(dragonfly_rank_hash_compare, dragonfly_hash_func, DFLY_HASH_TABLE_SIZE);

    struct dfly_hash_key key;
    key.message_id = msg->message_id;
    key.sender_id = msg->sender_lp;

    struct qhash_head *hash_link = NULL;
    struct dfly_qhash_entry *tmp = NULL;

    hash_link = qhash_search(s->rank_tbl, &key);

    if (hash_link)
        tmp = qhash_entry(hash_link, struct dfly_qhash_entry, hash_link);

    uint64_t total_chunks = msg->total_size / s->params->chunk_size;

    if (msg->total_size % s->params->chunk_size)
        total_chunks++;

    if (!total_chunks)
        total_chunks = 1;

    /*if(tmp)
    {
        if(tmp->num_chunks >= total_chunks || tmp->num_chunks < 0)
        {
           //tw_output(lp, "\n invalid number of chunks %d for LP %ld ", tmp->num_chunks, lp->gid);
           tw_lp_suspend(lp, 0, 0);
           return;
        }
    }*/
    assert(lp->gid == msg->dest_terminal_id);

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    if (msg->packet_ID == LLU(TRACK_PKT) && msg->src_terminal_id == T_ID)
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        printf("\n Packet %llu arrived at lp %llu hops %d ", msg->packet_ID, LLU(lp->gid), msg->my_N_hop);

    tw_stime ts = g_tw_lookahead + s->params->credit_delay + tw_rand_unif(lp->rng);

    // no method_event here - message going to router
    tw_event *buf_e;
    terminal_plus_message *buf_msg;
    buf_e =
        model_net_method_event_new(msg->intm_lp_id, ts, lp, DRAGONFLY_PLUS_ROUTER, (void **) &buf_msg, NULL);
    buf_msg->magic = router_magic_num;
    buf_msg->vc_index = msg->vc_index;
    buf_msg->output_chan = msg->output_chan;
    buf_msg->type = R_BUFFER;
    tw_event_send(buf_e);

    bf->c1 = 0;
    bf->c3 = 0;
    bf->c4 = 0;
    bf->c7 = 0;

    /* Total overall finished chunks in simulation */
    N_finished_chunks++;
    /* Finished chunks on a LP basis */
    s->finished_chunks++;
    /* Finished chunks per sample */
    s->fin_chunks_sample++;

    /* WE do not allow self messages through dragonfly */
    assert(lp->gid != msg->src_terminal_id);

Neil McGlohon's avatar
Neil McGlohon committed
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    // Verify that the router that send the packet to this terminal is the router assigned to this terminal
    int dest_router_id = dragonfly_plus_get_assigned_router_id(s->terminal_id, s->params);
    int received_from_rel_id = codes_mapping_get_lp_relative_id(msg->intm_lp_id,0,0);
    assert(dest_router_id == received_from_rel_id);

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    uint64_t num_chunks = msg->packet_size / s->params->chunk_size;
    if (msg->packet_size < s->params->chunk_size)
        num_chunks++;

    if (msg->path_type == MINIMAL)
        minimal_count++;
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    else
        nonmin_count++;
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    if (msg->chunk_id == num_chunks - 1) {
        bf->c31 = 1;
        s->packet_fin++;
        packet_fin++;
    }
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    // if (msg->path_type != MINIMAL)
    //     printf("\n Wrong message path type %d ", msg->path_type);
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    /* save the sample time */
    msg->saved_sample_time = s->fin_chunks_time;
    s->fin_chunks_time += (tw_now(lp) - msg->travel_start_time);

    /* save the total time per LP */
    msg->saved_avg_time = s->total_time;
    s->total_time += (tw_now(lp) - msg->travel_start_time);

    msg->saved_total_time = dragonfly_total_time;
    dragonfly_total_time += tw_now(lp) - msg->travel_start_time;
    total_hops += msg->my_N_hop;
    s->total_hops += msg->my_N_hop;
    s->fin_hops_sample += msg->my_N_hop;

    mn_stats *stat = model_net_find_stats(msg->category, s->dragonfly_stats_array);
    msg->saved_rcv_time = stat->recv_time;
    stat->recv_time += (tw_now(lp) - msg->travel_start_time);

#if DEBUG == 1
    if (msg->packet_ID == TRACK && msg->chunk_id == num_chunks - 1 && msg->message_id == TRACK_MSG) {
        printf("(%lf) [Terminal %d] packet %lld has arrived  \n", tw_now(lp), (int) lp->gid, msg->packet_ID);

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

        printf("My hop now is %d\n", msg->my_N_hop);
    }
#endif

    /* Now retreieve the number of chunks completed from the hash and update
     * them */
    void *m_data_src = model_net_method_get_edata(DRAGONFLY_PLUS, msg);

    /* If an entry does not exist then create one */
    if (!tmp) {
        bf->c5 = 1;
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        struct dfly_qhash_entry *d_entry = (dfly_qhash_entry *) calloc(1, sizeof(struct dfly_qhash_entry));
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        d_entry->num_chunks = 0;
        d_entry->key = key;
        d_entry->remote_event_data = NULL;
        d_entry->remote_event_size = 0;
        qhash_add(s->rank_tbl, &key, &(d_entry->hash_link));
        s->rank_tbl_pop++;

        if (s->rank_tbl_pop >= DFLY_HASH_TABLE_SIZE)
            tw_error(TW_LOC, "\n Exceeded allocated qhash size, increase hash size in dragonfly model");

        hash_link = &(d_entry->hash_link);
        tmp = d_entry;
    }

    assert(tmp);
    tmp->num_chunks++;

    if (msg->chunk_id == num_chunks - 1) {
        bf->c1 = 1;
        stat->recv_count++;
        stat->recv_bytes += msg->packet_size;

        N_finished_packets++;
        s->finished_packets++;
    }
    /* if its the last chunk of the packet then handle the remote event data */
    if (msg->remote_event_size_bytes > 0 && !tmp->remote_event_data) {
        /* Retreive the remote event entry */
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        tmp->remote_event_data = (char *) calloc(1, msg->remote_event_size_bytes);
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        assert(tmp->remote_event_data);
        tmp->remote_event_size = msg->remote_event_size_bytes;
        memcpy(tmp->remote_event_data, m_data_src, msg->remote_event_size_bytes);
    }
    if (s->min_latency > tw_now(lp) - msg->travel_start_time) {
        s->min_latency = tw_now(lp