dragonfly-plus.C 172 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 DEBUG_QOS 1
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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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#define BW_MONITOR 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

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static tw_stime max_qos_monitor = 5000000000;
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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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/* bw monitoring time in nanosecs */
static int bw_reset_window = 5000000;

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static FILE * dragonfly_rtr_bw_log = NULL;
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#define indexer3d(_ptr, _x, _y, _z, _maxx, _maxy, _maxz) \
        ((_ptr) + _z * (_maxx * _maxz) + _y * (_maxx) + _x)

#define indexer2d(_ptr, _x, _y, _maxx, _maxy) \
        ((_ptr) + _y * (_maxx) + _x)

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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_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;

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    // qos params
    int num_qos_levels;
    int * qos_bandwidths;

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    // 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];
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    int * qos_status;
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    unsigned long long* qos_data;
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    int num_term_rc_windows;
    int rc_index;
    int* last_qos_status;
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    unsigned long long* last_qos_data;
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    int last_qos_lvl;
    int is_monitoring_bw;
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    struct rc_stack *st;
    int issueIdle;
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    unsigned long long * terminal_length;
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    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];
    /* 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,
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    R_BANDWIDTH,
    T_BANDWIDTH,
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} 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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typedef enum qos_priority
{
    Q_HIGH =0,
    Q_MEDIUM,
    Q_LOW,
    Q_UNKNOWN,
} qos_priority;

typedef enum qos_status
{
    Q_ACTIVE = 1,
    Q_OVERBW,
} qos_status;

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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;
  
    /* qos related state variables */
    int rc_index;
    int num_rtr_rc_windows;
    int is_monitoring_bw;
    int* last_qos_lvl;
    int** qos_status;
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    unsigned long long** qos_data;
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    /* for reverse handler of qos */
    int* last_qos_status;
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    unsigned long long* last_qos_data;
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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_qos_levels =                 %d\n",p->num_qos_levels);
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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);
    }
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    rc = configuration_get_value_int(&config, "PARAMS", "num_qos_levels", anno, &p->num_qos_levels);
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    if(rc) {
        p->num_qos_levels = 1;
        fprintf(stderr, "Number of QOS levels not specified, setting to %d\n", p->num_qos_levels);
    }
    
    char qos_levels_str[MAX_NAME_LENGTH];
    rc = configuration_get_value(&config, "PARAMS", "qos_bandwidth", anno, qos_levels_str, MAX_NAME_LENGTH);
    p->qos_bandwidths = (int*)calloc(p->num_qos_levels, sizeof(int));

    if(p->num_qos_levels > 1)
    {
        int total_bw = 0;
        char * token;
        token = strtok(qos_levels_str, ",");
        int i = 0;
        while(token != NULL)
        {
            sscanf(token, "%d", &p->qos_bandwidths[i]);
            total_bw += p->qos_bandwidths[i];
            if(p->qos_bandwidths[i] <= 0)
            {
                tw_error(TW_LOC, "\n Invalid bandwidth levels");
            }
            i++;
            token = strtok(NULL,",");
        }
        assert(total_bw <= 100);
    }
    else
        p->qos_bandwidths[0] = 100;

    rc = configuration_get_value_double(&config, "PARAMS", "max_qos_monitor", anno, &max_qos_monitor);
    if(rc) {
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        printf("\n Setting max_qos_monitor to %lf ", max_qos_monitor);
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	}
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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);
    }

    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;
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    if(p->num_qos_levels > 1)
        p->num_vcs = p->num_qos_levels * p->num_vcs;
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    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);
        }
Neil McGlohon's avatar
Neil McGlohon committed
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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;
}

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void reset_rtr_bw_counters(router_state * s,
		tw_bf * bf, 
		terminal_plus_message * msg, 
        tw_lp * lp)
{
    int num_qos_levels = s->params->num_qos_levels;
    if(msg->type == R_BANDWIDTH)
    {
        for(int k = 0; k < s->num_rtr_rc_windows; k++)
        {   
            for(int i = 0; i < s->params->radix; i++)
            {
                for(int j = 0; j < num_qos_levels; j++)
            {
              *(indexer3d(s->last_qos_status, k, i, j, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = 0;
             *(indexer3d(s->last_qos_data, k, i, j, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = 0;
            }
            }
        }
        s->rc_index = 0;
    }
}
void reset_bw_counters(terminal_state * s,
		tw_bf * bf, 
		terminal_plus_message * msg, 
        tw_lp * lp)
{
   int num_qos_levels = s->params->num_qos_levels;
   if(msg->type == T_BANDWIDTH)
   {
        for(int i = 0; i < s->num_term_rc_windows; i++)
        {
            for(int j = 0; j < s->params->num_qos_levels; j++)
            {
              *(indexer2d(s->last_qos_status, i, j, s->num_term_rc_windows, num_qos_levels)) = 0;
             *(indexer2d(s->last_qos_data, i, j, s->num_term_rc_windows, num_qos_levels)) = 0;
            }
        }
        s->rc_index = 0; 
   }
}
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/* 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;
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    s->is_monitoring_bw = 0;
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    s->num_term_rc_windows = 100;
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    s->rc_index = 0;
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    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];
    }

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    int num_qos_levels = s->params->num_qos_levels;
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    int num_lps = codes_mapping_get_lp_count(lp_group_name, 1, LP_CONFIG_NM_TERM, s->anno, 0);
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    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);
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    s->num_vcs = 1;
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    if(num_qos_levels > 1)
        s->num_vcs *= num_qos_levels;
   
    /* Whether the virtual channel group is active or over-bw*/
    s->qos_status = (int*)calloc(num_qos_levels, sizeof(int));
   
    /* How much data has been transmitted on the virtual channel group within
    * the window */
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    s->qos_data = (unsigned long long*)calloc(num_qos_levels, sizeof(unsigned long long));
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    s->vc_occupancy = (int*)calloc(num_qos_levels, sizeof(int));
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    /* for reverse handlers */
    s->last_qos_status = (int*)calloc(s->num_term_rc_windows * num_qos_levels, sizeof(int));
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    s->last_qos_data = (unsigned long long*)calloc(s->num_term_rc_windows * num_qos_levels, sizeof(unsigned long long));
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    for(i = 0; i < num_qos_levels; i++)
    {
       s->qos_data[i] = 0;
       s->qos_status[i] = Q_ACTIVE;
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       s->vc_occupancy[i] = 0;
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    }

    s->last_qos_lvl = 0;
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    s->last_buf_full = 0;
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    s->rank_tbl = NULL;
    s->terminal_msgs =
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        (terminal_plus_message_list **) calloc(num_qos_levels, sizeof(terminal_plus_message_list *));
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    s->terminal_msgs_tail =
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        (terminal_plus_message_list **) calloc(num_qos_levels, sizeof(terminal_plus_message_list *));

    for(int i = 0; i < num_qos_levels; i++)
    {
        s->terminal_msgs[i] = NULL;
        s->terminal_msgs_tail[i] = NULL;
    }

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    s->terminal_length = (unsigned long long*)calloc(num_qos_levels, sizeof(unsigned long long));
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    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);

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    r->num_rtr_rc_windows = 100;
    r->rc_index = 0;
    r->is_monitoring_bw = 0;
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    r->fwd_events = 0;
    r->rev_events = 0;

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    // QoS related variables
    // for reverse computation of QoS
   /* history window for bandwidth reverse computation */
   int num_qos_levels = p->num_qos_levels;
   r->last_qos_status = (int*)calloc(r->num_rtr_rc_windows * r->params->radix * num_qos_levels, sizeof(int));
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   r->last_qos_data = (unsigned long long*)calloc(r->num_rtr_rc_windows * r->params->radix * num_qos_levels, sizeof(unsigned long long));
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    // 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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#if DEBUG_QOS == 1 
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        char rtr_bw_log[128];
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        sprintf(rtr_bw_log, "router-bw-tracker-%d", g_tw_mynode);
       
        if(dragonfly_rtr_bw_log == NULL)
        {
            dragonfly_rtr_bw_log = fopen(rtr_bw_log, "w+");
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           fprintf(dragonfly_rtr_bw_log, "\n router-id time-stamp port-id qos-level bw-consumed qos-status qos-data busy-time");
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        }
#endif 
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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 *));
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    r->qos_data = (unsigned long long**)calloc(p->radix, sizeof(unsigned long long*));
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    r->last_qos_lvl = (int*)calloc(p->radix, sizeof(int));
    r->qos_status = (int**)calloc(p->radix, sizeof(int*));
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    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
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        r->last_buf_full[i] = 0.0;
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        r->busy_time[i] = 0.0;
        r->busy_time_sample[i] = 0.0;
        r->next_output_available_time[i] = 0;
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        r->last_qos_lvl[i] = 0;
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        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->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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        r->qos_status[i] = (int*)calloc(num_qos_levels, sizeof(int));
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        r->qos_data[i] = (unsigned long long*)calloc(num_qos_levels, sizeof(unsigned long long));
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        for(int j = 0; j < num_qos_levels; j++)
        {
            r->qos_status[i][j] = Q_ACTIVE;
            r->qos_data[i][j] = 0;
        }
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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;
}
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int get_vcg_from_category(terminal_plus_message * msg)
{
   if(strcmp(msg->category, "high") == 0)
       return Q_HIGH;
   else if(strcmp(msg->category, "medium") == 0)
       return Q_MEDIUM;
   else
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       tw_error(TW_LOC, "\n priority needs to be specified with qos_levels > 1 %s", msg->category);
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}

static int get_rtr_bandwidth_consumption(router_state * s, int qos_lvl, int output_port)
{
    assert(qos_lvl >= Q_HIGH && qos_lvl <= Q_LOW);
    assert(output_port < s->params->intra_grp_radix + s->params->num_global_connections + s->params->num_cn);

    int bandwidth = s->params->cn_bandwidth;
    if(output_port < s->params->intra_grp_radix)
        bandwidth = s->params->local_bandwidth;
    else if(output_port < s->params->intra_grp_radix + s->params->num_global_connections)
        bandwidth = s->params->global_bandwidth;

    /* conversion into bytes/sec from GiB/sec */
    double max_bw = bandwidth * 1024.0 * 1024.0 * 1024.0;
    /* conversion into bytes per one nanosecs */
    double max_bw_per_ns = max_bw / (1000.0 * 1000.0 * 1000.0);
    /* derive maximum bytes that can be transferred during the window */
    double max_bytes_per_win = max_bw_per_ns * bw_reset_window;

    int percent_bw = (((double)s->qos_data[output_port][qos_lvl]) / max_bytes_per_win) * 100;
//    printf("\n percent bw consumed by qos_lvl %d is %d bytes transferred %d max_bw %lf ", qos_lvl, percent_bw, s->qos_data[output_port][qos_lvl], max_bw_per_ns);
    return percent_bw;

}

static int get_term_bandwidth_consumption(terminal_state * s, int qos_lvl)
{
    assert(qos_lvl >= Q_HIGH && qos_lvl <= Q_LOW);

    /* conversion into bytes/sec from GiB/sec */
    double max_bw = s->params->cn_bandwidth * 1024.0 * 1024.0 * 1024.0;
    /* conversion into bytes per one nanosecs */
    double max_bw_per_ns = max_bw / (1000.0 * 1000.0 * 1000.0);
    /* derive maximum bytes that can be transferred during the window */
    double max_bytes_per_win = max_bw_per_ns * bw_reset_window;
    int percent_bw = (((double)s->qos_data[qos_lvl]) / max_bytes_per_win) * 100;
//    printf("\n At terminal %lf max bytes %d percent %d ", max_bytes_per_win, s->qos_data[qos_lvl], percent_bw);
    return percent_bw;
}
/* reverse handler for router BW monitor */
void issue_rtr_bw_monitor_event_rc(router_state * s, tw_bf * bf, terminal_plus_message * msg, tw_lp * lp)
{
    int num_qos_levels = s->params->num_qos_levels; 
    int rc_index = msg->qos_index;

    for(int i = 0 ; i < msg->num_cll; i++)
        codes_local_latency_reverse(lp);
    
    for(int j = 0; j < s->params->radix; j++)
    {
        for(int k = 0; k < num_qos_levels; k++)  
        {
            s->qos_status[j][k] = *(indexer3d(s->last_qos_status, rc_index, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels));
            s->qos_data[j][k] = *(indexer3d(s->last_qos_data, rc_index, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels));
            *(indexer3d(s->last_qos_status, rc_index, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = 0;
            *(indexer3d(s->last_qos_data, rc_index, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = 0;
        }
    }
}
void issue_rtr_bw_monitor_event(router_state * s, tw_bf * bf, terminal_plus_message * msg, tw_lp * lp)
{
    msg->num_cll = 0;
    msg->num_rngs = 0;

    int num_qos_levels = s->params->num_qos_levels;
    int rc_index = s->rc_index;
    int num_rtr_rc_windows = s->num_rtr_rc_windows;

    /* dynamically reallocate the array.. */
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    if(s->rc_index >= s->num_rtr_rc_windows)
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    {
        s->num_rtr_rc_windows *= 2;
        int * tmp1 = (int*)calloc(s->num_rtr_rc_windows * s->params->radix * num_qos_levels, sizeof(int));
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        unsigned long long * tmp2 = (unsigned long long*)calloc(s->num_rtr_rc_windows * s->params->radix * num_qos_levels, sizeof(unsigned long long));
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        /* now copy elements one by one. can't use memcpy with 2d array. */
        for(int i = 0; i < num_rtr_rc_windows; i++)
        {
            for(int j = 0; j < s->params->radix; j++)
            {
                for(int k = 0; k < num_qos_levels; k++)
                {
                      *(indexer3d(tmp1, i, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = *(indexer3d(s->last_qos_status, i, j, k, num_rtr_rc_windows, s->params->radix, num_qos_levels));
                      *(indexer3d(tmp2, i, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = *(indexer3d(s->last_qos_data, i, j, k, num_rtr_rc_windows, s->params->radix, num_qos_levels));
                }
            }
        }
        free(s->last_qos_status);
        free(s->last_qos_data);

        s->last_qos_status = tmp1;
        s->last_qos_data = tmp2;
    }
    assert(rc_index < s->num_rtr_rc_windows && rc_index >= 0);
   
    for(int j = 0; j < s->params->radix; j++)
    {
        for(int k = 0; k < num_qos_levels; k++)
        {
                      *(indexer3d(s->last_qos_status, rc_index, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = s->qos_status[j][k];
                      *(indexer3d(s->last_qos_data, rc_index, j, k, s->num_rtr_rc_windows, s->params->radix, num_qos_levels)) = s->qos_data[j][k];
        }
    }
    
    msg->qos_index = s->rc_index;
    s->rc_index++;
    
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    for(int j = 0; j < s->params->radix; j++)
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    {
        for(int k = 0; k < num_qos_levels; k++)
        {
            int bw_consumed = get_rtr_bandwidth_consumption(s, k, j);
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#if DEBUG_QOS == 1 
            if(dragonfly_rtr_bw_log != NULL)
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            {
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                if(s->qos_data[j][k] > 0)
                {
                    fprintf(dragonfly_rtr_bw_log, "\n %d %f %d %d %d %d %d %f", s->router_id, tw_now(lp), j, k, bw_consumed, s->qos_status[j][k], s->qos_data[j][k], s->busy_time_sample[j]);
                }
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            }
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#endif 
            
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        }
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    }
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    for(int j = 0; j < s->params->radix; j++)
    {
        /* Reset the qos status and bandwidth consumption. */
        for(int k = 0; k < num_qos_levels; k++)
        {
            s->qos_status[j][k] = Q_ACTIVE;
            s->qos_data[j][k] = 0;
        }
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        s->busy_time_sample[j] = 0;
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    }
    
    if(tw_now(lp) > max_qos_monitor)
        return;
    
    msg->num_cll++;
    tw_stime bw_ts = bw_reset_window + codes_local_latency(lp);
    terminal_plus_message *m;
    tw_event * e = model_net_method_event_new(lp->gid, bw_ts, lp,
1643
            DRAGONFLY_PLUS_ROUTER, (void**)&m, NULL);
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    m->type = R_BANDWIDTH;
    m->magic = router_magic_num;
    tw_event_send(e);
}

void issue_bw_monitor_event_rc(terminal_state * s, tw_bf * bf, terminal_plus_message * msg, tw_lp * lp)
{
    for(int i = 0 ; i < msg->num_cll; i++)
        codes_local_latency_reverse(lp);
    
    int num_qos_levels = s->params->num_qos_levels;
    int num_term_rc_wins = s->num_term_rc_windows;
    int rc_index = msg->qos_index;

    for(int k = 0; k < num_qos_levels; k++)
    {
        s->qos_status[k] = *(indexer2d(s->last_qos_status, rc_index, k, num_term_rc_wins, num_qos_levels));
        s->qos_data[k] = *(indexer2d(s->last_qos_data, rc_index, k, num_term_rc_wins, num_qos_levels));
        *(indexer2d(s->last_qos_status, rc_index, k, num_term_rc_wins, num_qos_levels)) = 0;
        *(indexer2d(s->last_qos_data, rc_index, k, num_term_rc_wins, num_qos_levels)) = 0;
    }
}
/* resets the bandwidth numbers recorded so far */
void issue_bw_monitor_event(terminal_state * s, tw_bf * bf, terminal_plus_message * msg, tw_lp * lp)
{
   
    msg->num_cll = 0;
    msg->num_rngs = 0;
    int num_qos_levels = s->params->num_qos_levels;
    int rc_index = s->rc_index;
    int num_term_rc_wins = s->num_term_rc_windows;

    /* dynamically reallocate array if index has reached max-size */
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    if(s->rc_index >= s->num_term_rc_windows)
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    {
        s->num_term_rc_windows *= 2;
        int * tmp1 = (int*)calloc(s->num_term_rc_windows * num_qos_levels, sizeof(int));
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        unsigned long long * tmp2 = (unsigned long long*)calloc(s->num_term_rc_windows * num_qos_levels, sizeof(unsigned long long));
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        /* now copy elements one by one. can't use memcpy with 2d array. */
        for(int i = 0; i < s->num_term_rc_windows; i++)
        {
            for(int j = 0; j < num_qos_levels; j++)
            {
            *(indexer2d(tmp1, i, j,  s->num_term_rc_windows, num_qos_levels)) = *(indexer2d(s->last_qos_status, i, j,  num_term_rc_wins, num_qos_levels));
            *(indexer2d(tmp2, i, j, s->num_term_rc_windows, num_qos_levels)) = *(indexer2d(s->last_qos_data, i, j,  num_term_rc_wins, num_qos_levels)); 
            }
        }
       free(s->last_qos_status);
       free(s->last_qos_data);

       s->last_qos_status = tmp1;
       s->last_qos_data = tmp2;
    }
    /* Reset the qos status and bandwidth consumption. */
    for(int k = 0; k < num_qos_levels; k++)
    {
        *(indexer2d(s->last_qos_status, rc_index, k,  num_term_rc_wins, num_qos_levels)) = s->qos_status[k];
        *(indexer2d(s->last_qos_data, rc_index, k,  num_term_rc_wins, num_qos_levels)) = s->qos_data[k];
        s->qos_status[k] = Q_ACTIVE;
        s->qos_data[k] = 0;
    }
    msg->qos_index = s->rc_index;        
    s->rc_index++;
    assert(s->rc_index < s->num_term_rc_windows); 
    
/*    if(s->router_id == 0)
    {
       fprintf(dragonfly_term_bw_log, "\n %d %lf %lf ", s->terminal_id, tw_now(lp), s->busy_time_sample);
       s->busy_time_sample = 0;
    }
  */  
    if(tw_now(lp) > max_qos_monitor)
        return;
    
    msg->num_cll++;
    terminal_plus_message * m; 
    tw_stime bw_ts = bw_reset_window + codes_local_latency(lp);
1722
    tw_event * e = model_net_method_event_new(lp->gid, bw_ts, lp, DRAGONFLY_PLUS,
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            (void**)&m, NULL); 
    m->type = T_BANDWIDTH;
    m->magic = terminal_magic_num; 
    tw_event_send(e);
}

static int get_next_vcg(terminal_state * s, tw_bf * bf, terminal_plus_message * msg, tw_lp * lp)
{
  int num_qos_levels = s->params->num_qos_levels;
  
  if(num_qos_levels == 1)
  {
      if(s->terminal_msgs[0] == NULL || s->vc_occupancy[0] + s->params->chunk_size > s->params->cn_vc_size)
          return -1;
      else
          return 0;
  }

  int bw_consumption[num_qos_levels];

  /* First make sure the bandwidth consumptions are up to date. */
  for(int k = 0; k < num_qos_levels; k++)
  {
    if(s->qos_status[k] != Q_OVERBW)
    {
        bw_consumption[k] = get_term_bandwidth_consumption(s, k);
        if(bw_consumption[k] > s->params->qos_bandwidths[k]) 
        {
            if(k == 0)
                msg->qos_reset1 = 1;
            else if(k == 1)
                msg->qos_reset2 = 1;

            s->qos_status[k] = Q_OVERBW;
        }
    }
  }
  if(BW_MONITOR == 1)
  {
   for(int i = 0; i < num_qos_levels; i++)
   {
        if(s->qos_status[i] == Q_ACTIVE)
        {
            if(s->terminal_msgs[i] != NULL && s->vc_occupancy[i] + s->params->chunk_size <= s->params->cn_vc_size)
               return i;
        }
   }
  }


   int next_rr_vcg = (s->last_qos_lvl + 1) % num_qos_levels;
   /* All vcgs are exceeding their bandwidth limits*/
   for(int i = 0; i < num_qos_levels; i++)
   {
        if(s->terminal_msgs[i] != NULL && s->vc_occupancy[i] + s->params->chunk_size <= s->params->cn_vc_size)
        {
            bf->c2 = 1;
            
            if(msg->last_saved_qos < 0)
                msg->last_saved_qos = s->last_qos_lvl;
            
            s->last_qos_lvl = next_rr_vcg;
            return i;
        }
        next_rr_vcg = (next_rr_vcg + 1) % num_qos_levels;
   }
   return -1;
}
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/* 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;
1828
    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*/
1865
static void router_credit_send(router_state *s, terminal_plus_message *msg, tw_lp *lp, int sq, short*