dragonfly-plus.C 141 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
#define PRINT_CONFIG 1
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#define CREDIT_SIZE 8
#define DFLY_HASH_TABLE_SIZE 4999
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#define SHOW_ADAPTIVE_STATS 1
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// debugging parameters
#define TRACK -1
#define TRACK_PKT -1
#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);
}

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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    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;
};

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;

    tw_stime *last_buf_full;
    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,
} 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 dfp_path_hop_t
{
    SOURCE_LEAF = 1, //a leaf router in the packets originating group
    SOURCE_SPINE, //a spine router in the packets originating group
    INTERMEDIATE_LEAF, //a leaf router not in the packets originating group or destination group
    INTERMEDIATE_SPINE, //a spine router not in the packets originating group or destination group
    DESTINATION_LEAF, //a leaf router in the packets destination group
    DESTINATION_SPINE //a spine router in the packets destination group
} dfp_path_hop_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
};

struct router_state
{
    unsigned int router_id;
    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 *global_channel;

    tw_stime *next_output_available_time;
    tw_stime **last_buf_full;

    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(dragonfly_plus_param *p)
{
    int myRank;
    MPI_Comm_rank(MPI_COMM_CODES, &myRank);
    if (!myRank) { 
        printf("--------- Dragonfly Plus Parameters ---------\n");
        printf("num_routers =            %d\n",p->num_routers);
        printf("local_bandwidth =        %.2f\n",p->local_bandwidth);
        printf("global_bandwidth =       %.2f\n",p->global_bandwidth);
        printf("cn_bandwidth =           %.2f\n",p->cn_bandwidth);
        printf("num_vcs =                %d\n",p->num_vcs);
        printf("local_vc_size =          %d\n",p->local_vc_size);
        printf("global_vc_size =         %d\n",p->global_vc_size);
        printf("cn_vc_size =             %d\n",p->cn_vc_size);
        printf("num_cn =                 %d\n",p->num_cn);
        printf("intra_grp_radix =        %d\n",p->intra_grp_radix);
        printf("num_level_chans =        %d\n",p->num_level_chans);
        printf("num_router_spine =       %d\n",p->num_router_spine);
        printf("num_router_leaf =        %d\n",p->num_router_leaf);
        printf("adaptive_threshold =     %d\n",p->adaptive_threshold);
        printf("max_port_score =         %d\n",p->max_port_score);
        printf("num_groups =             %d\n",p->num_groups);
        printf("radix =                  %d\n",p->radix);
        printf("total_routers =          %d\n",p->total_routers);
        printf("total_terminals =        %d\n",p->total_terminals);
        printf("num_global_connections = %d\n",p->num_global_connections);
        printf("cn_delay =               %.2f\n",p->cn_delay);
        printf("local_delay =            %.2f\n",p->local_delay);
        printf("global_delay =           %.2f\n",p->global_delay);
        printf("credit_delay =           %.2f\n",p->credit_delay);
        printf("router_delay =           %.2f\n",p->router_delay);
        printf("scoring =                %d\n",scoring);
        printf("routing =                %d\n",routing);
        printf("---------------------------------------------\n");
    }
}

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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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    }

    /* 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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    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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}

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);
    all_params = (dragonfly_plus_param *) malloc(num_params * sizeof(*all_params));

    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) {
        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;
    s->vc_occupancy = (int *) malloc(s->num_vcs * sizeof(int));
    s->last_buf_full = (tw_stime *) malloc(s->num_vcs * sizeof(tw_stime));

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


    s->rank_tbl = NULL;
    s->terminal_msgs =
        (terminal_plus_message_list **) malloc(s->num_vcs * sizeof(terminal_plus_message_list *));
    s->terminal_msgs_tail =
        (terminal_plus_message_list **) malloc(s->num_vcs * sizeof(terminal_plus_message_list *));
    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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        // 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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        // 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->global_channel = (int *) malloc(p->num_global_connections * sizeof(int));
    r->next_output_available_time = (tw_stime *) malloc(p->radix * sizeof(tw_stime));
    r->link_traffic = (int64_t *) malloc(p->radix * sizeof(int64_t));
    r->link_traffic_sample = (int64_t *) malloc(p->radix * sizeof(int64_t));

    r->vc_occupancy = (int **) malloc(p->radix * sizeof(int *));
    r->in_send_loop = (int *) malloc(p->radix * sizeof(int));
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    r->pending_msgs =
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        (terminal_plus_message_list ***) malloc(p->radix * sizeof(terminal_plus_message_list **));
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    r->pending_msgs_tail =
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        (terminal_plus_message_list ***) malloc(p->radix * sizeof(terminal_plus_message_list **));
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    r->queued_msgs =
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        (terminal_plus_message_list ***) malloc(p->radix * sizeof(terminal_plus_message_list **));
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    r->queued_msgs_tail =
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        (terminal_plus_message_list ***) malloc(p->radix * sizeof(terminal_plus_message_list **));
    r->queued_count = (int *) malloc(p->radix * sizeof(int));
    r->last_buf_full = (tw_stime **) malloc(p->radix * sizeof(tw_stime *));
    r->busy_time = (tw_stime *) malloc(p->radix * sizeof(tw_stime));
    r->busy_time_sample = (tw_stime *) malloc(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;
        r->vc_occupancy[i] = (int *) malloc(p->num_vcs * sizeof(int));
        r->pending_msgs[i] =
            (terminal_plus_message_list **) malloc(p->num_vcs * sizeof(terminal_plus_message_list *));
        r->last_buf_full[i] = (tw_stime *) malloc(p->num_vcs * sizeof(tw_stime));
        r->pending_msgs_tail[i] =
            (terminal_plus_message_list **) malloc(p->num_vcs * sizeof(terminal_plus_message_list *));
        r->queued_msgs[i] =
            (terminal_plus_message_list **) malloc(p->num_vcs * sizeof(terminal_plus_message_list *));
        r->queued_msgs_tail[i] =
            (terminal_plus_message_list **) malloc(p->num_vcs * sizeof(terminal_plus_message_list *));
        for (int j = 0; j < p->num_vcs; j++) {
            r->last_buf_full[i][j] = 0.0;
            r->vc_occupancy[i][j] = 0;
            r->pending_msgs[i][j] = NULL;
            r->pending_msgs_tail[i][j] = NULL;
            r->queued_msgs[i][j] = NULL;
            r->queued_msgs_tail[i][j] = NULL;
        }
    }

    return;
}

/* 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;
1208
    msg->dfp_dest_terminal_id = codes_mapping_get_lp_relative_id(msg->dest_terminal_id,0,0);
1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
    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;
    }
1262
    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--;

    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;
        if (bf->c8) {
            s->last_buf_full[0] = msg->saved_busy_time;
        }
    }
    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;

1342
    int dest_router_id = dragonfly_plus_get_assigned_router_id(msg->dfp_dest_terminal_id, s->params);
1343 1344
    int dest_grp_id = dest_router_id / s->params->num_routers;
    int src_grp_id = s->router_id / s->params->num_routers;
1345 1346

    if(src_grp_id == dest_grp_id)
1347 1348 1349 1350 1351 1352
    {
      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);

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

    // if(msg->dest_terminal_id == TRACK)
    if (msg->packet_ID == LLU(TRACK_PKT))
        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 =
            (terminal_plus_message_list *) malloc(sizeof(terminal_plus_message_list));
        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 =
                (char *) malloc(msg->remote_event_size_bytes + msg->local_event_size_bytes);
        }

        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->last_buf_full[0] == 0.0) {
            bf->c8 = 1;
            msg->saved_busy_time = s->last_buf_full[0];
            /* TODO: Assumes a single vc from terminal to router */
            s->last_buf_full[0] = tw_now(lp);
        }
    }

    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;

        if (bf->c10)
            s->last_buf_full[0] = msg->saved_busy_time;

        return;
    }

    tw_rand_reverse_unif(lp->rng);
    s->terminal_available_time = msg->saved_available_time;
    if (bf->c2) {
        codes_local_latency_reverse(lp);
    }

    s->terminal_length += s->params->chunk_size;
    s->packet_counter--;
    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;
            s->last_buf_full[0] = msg->saved_busy_time;
            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];

    if (s->vc_occupancy[0] + s->params->chunk_size > s->params->cn_vc_size) {
        if (s->last_buf_full[0] == 0.0) {
            bf->c10 = 1;
            msg->saved_busy_time = s->last_buf_full[0];
            s->last_buf_full[0] = tw_now(lp);
        }
    }

    if (s->vc_occupancy[0] + s->params->chunk_size > s->params->cn_vc_size || cur_entry == NULL) {
        bf->c1 = 1;
        s->in_send_loop = 0;
        return;
    }

    uint64_t num_chunks = cur_entry->msg.packet_size / s->params->chunk_size;
    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;
1541
    m->intm_group_id = -1;
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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);
    }
    s->packet_counter++;
    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);

        if (s->last_buf_full[0] > 0.0) {
            bf->c6 = 1;
            msg->saved_total_time = s->busy_time;
            msg->saved_busy_time = s->last_buf_full[0];
            msg->saved_sample_time = s->busy_time_sample;

            s->busy_time += (tw_now(lp) - s->last_buf_full[0]);
            s->busy_time_sample += (tw_now(lp) - s->last_buf_full[0]);
            s->last_buf_full[0] = 0.0;
        }
    }
    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--;
1606 1607
    else
        nonmin_count--;
1608 1609
    // 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

1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730
    if (routing == MINIMAL) {
        if (msg->my_N_hop > 4)
            printf("Bad Routed Packet Arrived: %d hops\n",msg->my_N_hop);
    }
    if (routing == NON_MINIMAL_LEAF) {
        if (msg->my_N_hop > 7)
            printf("Bad Routed Packet Arrived: %d hops\n",msg->my_N_hop);
    }
    if (routing == NON_MINIMAL_SPINE) {
        if (msg->my_N_hop > 5)
            printf("Bad Routed Packet Arrived: %d hops\n",msg->my_N_hop);
    }
    if (routing == PROG_ADAPTIVE) {
        if (msg->my_N_hop > 7)
            printf("Bad Routed Packet Arrived: %d hops\n",msg->my_N_hop);
    }
    
1731

1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796
    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);

    if (msg->packet_ID == LLU(TRACK_PKT))
        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);

1797 1798 1799 1800 1801
    // 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);

1802 1803 1804 1805 1806 1807
    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++;
1808 1809
    else
        nonmin_count++;
1810 1811 1812 1813 1814 1815

    if (msg->chunk_id == num_chunks - 1) {
        bf->c31 = 1;
        s->packet_fin++;
        packet_fin++;
    }
1816 1817
    // if (msg->path_type != MINIMAL)
    //     printf("\n Wrong message path type %d ", msg->path_type);
1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933

    /* 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;
        struct dfly_qhash_entry *d_entry = (dfly_qhash_entry *) malloc(sizeof(struct dfly_qhash_entry));
        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 */
        tmp->remote_event_data = (char *) malloc(msg->remote_event_size_bytes);
        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) - msg->travel_start_time;
    }
    if (dragonfly_max_latency < tw_now(lp) - msg->travel_start_time) {
        bf->c3 = 1;
        msg->saved_available_time = dragonfly_max_latency;
        dragonfly_max_latency = tw_now(lp) - msg->travel_start_time;
        s->max_latency = tw_now(lp) - msg->travel_start_time;
    }
    if (s->max_latency < tw_now(lp) - msg->travel_start_time) {
        bf->c22 = 1;
        msg->saved_available_time = s->max_latency;
        s->max_latency = tw_now(lp) - msg->travel_start_time;
    }
    /* If all chunks of a message have arrived then send a remote event to the
     * callee*/
    // assert(tmp->num_chunks <= total_chunks);

    if (tmp->num_chunks >= total_chunks) {
        bf->c7 = 1;

        s->data_size_sample += msg->total_size;
        N_finished_msgs++;
        total_msg_sz += msg->total_size;
        s->total_msg_size += msg->total_size;
        s->finished_msgs++;

        // assert(tmp->remote_event_data && tmp->remote_event_size > 0);
        if (tmp->remote_event_data && tmp->remote_event_size > 0) {
            bf->c8 = 1;
            send_remote_event(s, msg, lp, bf, tmp->remote_event_data, tmp->remote_event_size);
        }
        /* Remove the hash entry */
        qhash_del(hash_link);
        rc_stack_push(lp, tmp, free_tmp, s->st);
        s->rank_tbl_pop--;
    }
    return;
}

void dragonfly_plus_rsample_init(router_state *s, tw_lp *lp)
{
    (void) lp;
    int i = 0;
    const dragonfly_plus_param *p = s->params;

1934
    assert(p->radix);
1935 1936 1937 1938

    s->max_arr_size = MAX_STATS;
    s->rsamples = (struct dfly_router_sample *) malloc(MAX_STATS * sizeof(struct dfly_router_sample));
    for (; i < s->max_arr_size; i++) {
1939 1940
        s->rsamples[i].busy_time = (tw_stime *) malloc(sizeof(tw_stime) * p->radix);
        s->rsamples[i].link_traffic_sample = (int64_t *) malloc(sizeof(int64_t) * p->radix);
1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955
    }
}
void dragonfly_plus_rsample_rc_fn(router_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    (void) bf;
    (void) lp;
    (void) msg;

    s->op_arr_size--;
    int cur_indx = s->op_arr_size;
    struct dfly_router_sample stat = s->rsamples[cur_indx];

    const dragonfly_plus_param *p = s->params;
    int i = 0;

1956
    for (; i < p->radix; i++) {
1957 1958 1959 1960
        s->busy_time_sample[i] = stat.busy_time[i];
        s->link_traffic_sample[i] = stat.link_traffic_sample[i];
    }

1961
    for (i = 0; i < p->radix; i++) {
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993
        stat.busy_time[i] = 0;
        stat.link_traffic_sample[i] = 0;
    }
    s->fwd_events = stat.fwd_events;
    s->rev_events = stat.rev_events;
}

void dragonfly_plus_rsample_fn(router_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    (void) bf;
    (void) lp;
    (void) msg;

    const dragonfly_plus_param *p = s->params;

    if (s->op_arr_size >= s->max_arr_size) {
        struct dfly_router_sample *tmp =
            (dfly_router_sample *) malloc((MAX_STATS + s->max_arr_size) * sizeof(struct dfly_router_sample));
        memcpy(tmp, s->rsamples, s->op_arr_size * sizeof(struct dfly_router_sample));
        free(s->rsamples);
        s->rsamples = tmp;
        s->max_arr_size += MAX_STATS;
    }

    int i = 0;
    int cur_indx = s->op_arr_size;

    s->rsamples[cur_indx].router_id = s->router_id;
    s->rsamples[cur_indx].end_time = tw_now(lp);
    s->rsamples[cur_indx].fwd_events = s->fwd_events;
    s->rsamples[cur_indx].rev_events = s->rev_events;

1994
    for (; i < p->radix; i++) {
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
        s->rsamples[cur_indx].busy_time[i] = s->busy_time_sample[i];
        s->rsamples[cur_indx].link_traffic_sample[i] = s->link_traffic_sample[i];
    }

    s->op_arr_size++;

    /* clear up the current router stats */
    s->fwd_events = 0;
    s->rev_events = 0;

2005
    for (i = 0; i < p->radix; i++) {
2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026
        s->busy_time_sample[i] = 0;
        s->link_traffic_sample[i] = 0;
    }
}

void dragonfly_plus_rsample_fin(router_state *s, tw_lp *lp)
{
    (void) lp;
    const dragonfly_plus_param *p = s->params;

    if (s->router_id == 0) {
        /* write metadata file */
        char meta_fname[64];
        sprintf(meta_fname, "dragonfly-plus-router-sampling.meta");

        FILE *fp = fopen(meta_fname, "w");
        fprintf(fp,
                "Router sample struct format: \nrouter_id (tw_lpid) \nbusy time for each of the %d links "
                "(double) \n"
                "link traffic for each of the %d links (int64_t) \nsample end time (double) forward events "
                "per sample \nreverse events per sample ",
2027
                p->radix, p->radix);
2028 2029 2030 2031 2032 2033 2034 2035 2036 2037
        fclose(fp);
    }
    char rt_fn[MAX_NAME_LENGTH];
    if (strcmp(router_sample_file, "") == 0)
        sprintf(rt_fn, "dragonfly-plus-router-sampling-%ld.bin", g_tw_mynode);
    else
        sprintf(rt_fn, "%s-%ld.bin", router_sample_file, g_tw_mynode);

    int i = 0;

2038
    int size_sample = sizeof(tw_lpid) + p->radix * (sizeof(int64_t) + sizeof(tw_stime)) +
2039 2040 2041 2042 2043 2044
                      sizeof(tw_stime) + 2 * sizeof(long);
    FILE *fp = fopen(rt_fn, "a");
    fseek(fp, sample_rtr_bytes_written, SEEK_SET);

    for (; i < s->op_arr_size; i++) {
        fwrite((void *) &(s->rsamples[i].router_id), sizeof(tw_lpid), 1, fp);
2045 2046
        fwrite(s->rsamples[i].busy_time, sizeof(tw_stime), p->radix, fp);
        fwrite(s->rsamples[i].link_traffic_sample, sizeof(int64_t), p->radix, fp);
2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271
        fwrite((void *) &(s->rsamples[i].end_time), sizeof(tw_stime), 1, fp);
        fwrite((void *) &(s->rsamples[i].fwd_events), sizeof(long), 1, fp);
        fwrite((void *) &(s->rsamples[i].rev_events), sizeof(long), 1, fp);
    }
    sample_rtr_bytes_written += (s->op_arr_size * size_sample);
    fclose(fp);
}
void dragonfly_plus_sample_init(terminal_state *s, tw_lp *lp)
{
    (void) lp;
    s->fin_chunks_sample = 0;
    s->data_size_sample = 0;
    s->fin_hops_sample = 0;
    s->fin_chunks_time = 0;
    s->busy_time_sample = 0;

    s->op_arr_size = 0;
    s->max_arr_size = MAX_STATS;

    s->sample_stat = (dfly_cn_sample *) malloc(MAX_STATS * sizeof(struct dfly_cn_sample));
}
void dragonfly_plus_sample_rc_fn(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    (void) lp;
    (void) bf;
    (void) msg;

    s->op_arr_size--;
    int cur_indx = s->op_arr_size;
    struct dfly_cn_sample stat = s->sample_stat[cur_indx];
    s->busy_time_sample = stat.busy_time_sample;
    s->fin_chunks_time = stat.fin_chunks_time;
    s->fin_hops_sample = stat.fin_hops_sample;
    s->data_size_sample = stat.data_size_sample;
    s->fin_chunks_sample = stat.fin_chunks_sample;
    s->fwd_events = stat.fwd_events;
    s->rev_events = stat.rev_events;

    stat.busy_time_sample = 0;
    stat.fin_chunks_time = 0;
    stat.fin_hops_sample = 0;
    stat.data_size_sample = 0;
    stat.fin_chunks_sample = 0;
    stat.end_time = 0;
    stat.terminal_id = 0;
    stat.fwd_events = 0;
    stat.rev_events = 0;
}

void dragonfly_plus_sample_fn(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    (void) lp;
    (void) msg;
    (void) bf;

    if (s->op_arr_size >= s->max_arr_size) {
        /* In the worst case, copy array to a new memory location, its very
         * expensive operation though */
        struct dfly_cn_sample *tmp =
            (dfly_cn_sample *) malloc((MAX_STATS + s->max_arr_size) * sizeof(struct dfly_cn_sample));
        memcpy(tmp, s->sample_stat, s->op_arr_size * sizeof(struct dfly_cn_sample));
        free(s->sample_stat);
        s->sample_stat = tmp;
        s->max_arr_size += MAX_STATS;
    }

    int cur_indx = s->op_arr_size;

    s->sample_stat[cur_indx].terminal_id = s->terminal_id;
    s->sample_stat[cur_indx].fin_chunks_sample = s->fin_chunks_sample;
    s->sample_stat[cur_indx].data_size_sample = s->data_size_sample;
    s->sample_stat[cur_indx].fin_hops_sample = s->fin_hops_sample;
    s->sample_stat[cur_indx].fin_chunks_time = s->fin_chunks_time;
    s->sample_stat[cur_indx].busy_time_sample = s->busy_time_sample;
    s->sample_stat[cur_indx].end_time = tw_now(lp);
    s->sample_stat[cur_indx].fwd_events = s->fwd_events;
    s->sample_stat[cur_indx].rev_events = s->rev_events;

    s->op_arr_size++;
    s->fin_chunks_sample = 0;
    s->data_size_sample = 0;
    s->fin_hops_sample = 0;
    s->fwd_events = 0;
    s->rev_events = 0;
    s->fin_chunks_time = 0;
    s->busy_time_sample = 0;
}

void dragonfly_plus_sample_fin(terminal_state *s, tw_lp *lp)
{
    (void) lp;


    if (!g_tw_mynode) {
        /* write metadata file */
        char meta_fname[64];
        sprintf(meta_fname, "dragonfly-cn-sampling.meta");

        FILE *fp = fopen(meta_fname, "w");
        fprintf(
            fp,
            "Compute node sample format\nterminal_id (tw_lpid) \nfinished chunks (long)"
            "\ndata size per sample (long) \nfinished hops (double) \ntime to finish chunks (double)"
            "\nbusy time (double)\nsample end time(double) \nforward events (long) \nreverse events (long)");
        fclose(fp);
    }

    char rt_fn[MAX_NAME_LENGTH];
    if (strncmp(cn_sample_file, "", 10) == 0)
        sprintf(rt_fn, "dragonfly-cn-sampling-%ld.bin", g_tw_mynode);
    else
        sprintf(rt_fn, "%s-%ld.bin", cn_sample_file, g_tw_mynode);

    FILE *fp = fopen(rt_fn, "a");
    fseek(fp, sample_bytes_written, SEEK_SET);
    fwrite(s->sample_stat, sizeof(struct dfly_cn_sample), s->op_arr_size, fp);
    fclose(fp);

    sample_bytes_written += (s->op_arr_size * sizeof(struct dfly_cn_sample));
}

static void terminal_buf_update_rc(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    s->vc_occupancy[0] += s->params->chunk_size;
    codes_local_latency_reverse(lp);
    if (bf->c1) {
        s->in_send_loop = 0;
    }

    return;
}
/* update the compute node-router channel buffer */
static void terminal_buf_update(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    bf->c1 = 0;
    bf->c2 = 0;
    bf->c3 = 0;

    tw_stime ts = codes_local_latency(lp);
    s->vc_occupancy[0] -= s->params->chunk_size;

    if (s->in_send_loop == 0 && s->terminal_msgs[0] != NULL) {
        terminal_plus_message *m;
        bf->c1 = 1;
        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);
    }
    return;
}

void terminal_plus_event(terminal_state *s, tw_bf *bf, terminal_plus_message *msg, tw_lp *lp)
{
    s->fwd_events++;
    //*(int *)bf = (int)0;
    assert(msg->magic == terminal_magic_num);

    rc_stack_gc(lp, s->st);
    switch (msg->type) {
        case T_GENERATE:
            packet_generate(s, bf, msg, lp);
            break;

        case T_ARRIVE:
            packet_arrive(s, bf, msg, lp);
            break;

        case T_SEND:
            packet_send(s, bf, msg, lp);
            break;

        case T_BUFFER:
            terminal_buf_update(s, bf, msg, lp);
            break;

        default:
            printf("\n LP %d Terminal message type not supported %d ", (int) lp->gid, msg->type);
            tw_error(TW_LOC, "Msg type not supported");
    }
}

void dragonfly_plus_terminal_final(terminal_state *s, tw_lp *lp)
{
    model_net_print_stats(lp->gid, s->dragonfly_stats_array);

    if (s->terminal_id == 0) {
        char meta_filename[64];
        sprintf(meta_filename, "dragonfly-msg-stats.meta");

        FILE *fp = fopen(meta_filename, "w+");
        fprintf(fp,
                "# Format <LP id> <Terminal ID> <Total Data Size> <Avg packet latency> <# Flits/Packets "
                "finished> <Avg hops> <Busy Time> <Max packet Latency> <Min packet Latency >\n");
    }
    int written = 0;

    written += sprintf(s->output_buf + written, "%llu %u %llu %lf %ld %lf %lf %lf %lf\n", LLU(lp->gid),
                       s->terminal_id, LLU(s->total_msg_size), s->total_time / s->finished_chunks,
                       s->finished_packets, (double) s->total_hops / s->finished_chunks, s->busy_time,
                       s->max_latency, s->min_latency);

    lp_io_write(lp->gid, (char *) "dragonfly-msg-stats", written, s->output_buf);

    if (s->terminal_msgs[0] != NULL)
        printf("[%llu] leftover terminal messages \n", LLU(lp->gid));


    // if(s->packet_gen != s->packet_fin)
    //    printf("\n generated %d finished %d ", s->packet_gen, s->packet_fin);

    if (s->rank_tbl)
        qhash_finalize(s->rank_tbl);

    rc_stack_destroy(s->st);
    free(s->vc_occupancy);
    free(s->terminal_msgs);
    free(s->terminal_msgs_tail);
}

void dragonfly_plus_router_final(router_state *s, tw_lp *lp)
{
    free(s->global_channel);
    int i, j;
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    for (i = 0; i < s->params->radix; i++) {
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        for (j = 0; j < s->params->num_vcs; j++) {
            if (s->queued_msgs[i][j] != NULL) {
                printf("[%llu] leftover queued messages %d %d %d\n", LLU(lp->gid), i, j,
                       s->vc_occupancy[i][j]);
            }
            if (s->pending_msgs[i][j] != NULL) {
                printf("[%llu] lefover pending messages %d %d\n", LLU(lp->gid), i, j);
            }
        }
    }

    rc_stack_destroy(s->st);

    /*MM: These statistics will need to be updated for dragonfly plus.
     * Especially the meta file information on router ports still have green
     * and black links. */
    const dragonfly_plus_param *p = s->params;
    int written = 0;
    if (!s->router_id) {
        written = sprintf(s->output_buf, "DRAGONFLY-PLUS STATS OUTPUT NOT IMPLEMENTED\n");
        written =
            sprintf(s->output_buf, "# Format <LP ID> <Group ID> <Router ID> <Busy time per router port(s)>");
    }
    written += sprintf(s->output_buf + written, "\n %llu %d %d", LLU(lp->gid), s->router_id / p->num_routers,
                       s->router_id % p->num_routers);