simplep2p.c 29.5 KB
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/*
 * Copyright (C) 2014 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
 */

#include <string.h>
#include <assert.h>
#include <ross.h>

#include "codes/lp-io.h"
#include "codes/jenkins-hash.h"
#include "codes/model-net-method.h"
#include "codes/model-net.h"
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#include "codes/model-net-lp.h"
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#include "codes/codes_mapping.h"
#include "codes/codes.h"
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#include "codes/net/simplep2p.h"
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#define CATEGORY_NAME_MAX 16
#define CATEGORY_MAX 12

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#define SIMPLEP2P_DEBUG 0
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#define LP_CONFIG_NM (model_net_lp_config_names[SIMPLEP2P])
#define LP_METHOD_NM (model_net_method_names[SIMPLEP2P])
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// parameters for simplep2p configuration
struct simplep2p_param
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{
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    double * net_latency_ns_table;
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    double * net_bw_mbps_table;
    int mat_len;
    int num_lps;
};
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typedef struct simplep2p_param simplep2p_param;
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/*Define simplep2p data types and structs*/
typedef struct sp_state sp_state;
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typedef struct category_idles_s category_idles;

struct category_idles_s{
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    /* each simplep2p "NIC" actually has N connections, so we need to track
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     * idle times across all of them to correctly do stats */
    tw_stime send_next_idle_all;
    tw_stime send_prev_idle_all;
    tw_stime recv_next_idle_all;
    tw_stime recv_prev_idle_all;
    char category[CATEGORY_NAME_MAX];
};

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struct sp_state
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{
    /* next idle times for network card, both inbound and outbound */
    tw_stime *send_next_idle;
    tw_stime *recv_next_idle;

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    const char * anno;
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    const simplep2p_param * params;
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    int id; /* logical id for matrix lookups */

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    /* Each simplep2p "NIC" actually has N connections, so we need to track
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     * idle times across all of them to correctly do stats.
     * Additionally need to track different idle times across different 
     * categories */
    category_idles idle_times_cat[CATEGORY_MAX];

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    struct mn_stats sp_stats_array[CATEGORY_MAX];
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};

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/* annotation-specific parameters (unannotated entry occurs at the 
 * last index) */
static uint64_t                  num_params = 0;
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static simplep2p_param         * all_params = NULL;
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static const config_anno_map_t * anno_map   = NULL;
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static int sp_magic = 0;
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/* returns a pointer to the lptype struct to use for simplep2p LPs */
static const tw_lptype* sp_get_lp_type(void);
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/* set model parameters:
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 * - latency_fname - path containing triangular matrix of net latencies, in ns
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 * - bw_fname      - path containing triangular matrix of bandwidths in MB/s.
 * note that this merely stores the files, they will be parsed later 
 */
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static void sp_set_params(
        const char      * latency_fname,
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        const char      * bw_fname,
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        simplep2p_param * params);
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static void sp_configure();
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/* retrieve the size of the portion of the event struct that is consumed by
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 * the simplep2p module.  The caller should add this value to the size of
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 * its own event structure to get the maximum total size of a message.
 */
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static int sp_get_msg_sz(void);
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/* Returns the simplep2p magic number */
static int sp_get_magic();
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/* given two simplep2p logical ids, do matrix lookups to get the point-to-point
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 * latency/bandwidth */
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static double sp_get_table_ent(
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        int      from_id, 
        int      to_id,
        int      num_lps,
        double * table);
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/* category lookup */
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static category_idles* sp_get_category_idles(
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        char * category, category_idles *idles);

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/* collective network calls */
static void simple_wan_collective();

/* collective network calls-- rc */
static void simple_wan_collective_rc();

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/* Issues a simplep2p packet event call */
static tw_stime simplep2p_packet_event(
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        char* category,
        tw_lpid final_dest_lp,
        uint64_t packet_size,
        int is_pull,
        uint64_t pull_size, /* only used when is_pull == 1 */
        tw_stime offset,
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        const mn_sched_params *sched_params,
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        int remote_event_size,
        const void* remote_event,
        int self_event_size,
        const void* self_event,
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        tw_lpid src_lp,
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        tw_lp *sender,
        int is_last_pckt);
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static void simplep2p_packet_event_rc(tw_lp *sender);
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static void simplep2p_packet_event_rc(tw_lp *sender);
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static void sp_report_stats();
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static tw_lpid sp_find_local_device(
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        const char * annotation,
        int ignore_annotations,
        tw_lp *sender);
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/* data structure for model-net statistics */
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struct model_net_method simplep2p_method =
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{
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    .mn_configure = sp_configure,
    .model_net_method_packet_event = simplep2p_packet_event,
    .model_net_method_packet_event_rc = simplep2p_packet_event_rc,
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    .model_net_method_recv_msg_event = NULL,
    .model_net_method_recv_msg_event_rc = NULL,
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    .mn_get_lp_type = sp_get_lp_type,
    .mn_get_msg_sz = sp_get_msg_sz,
    .mn_report_stats = sp_report_stats,
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    .model_net_method_find_local_device = NULL,
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    .mn_collective_call = simple_wan_collective,
    .mn_collective_call_rc = simple_wan_collective_rc  
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};

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static void sp_init(
    sp_state * ns,
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    tw_lp * lp);
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static void sp_event(
    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp);
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static void sp_rev_event(
    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp);
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static void sp_finalize(
    sp_state * ns,
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    tw_lp * lp);

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tw_lptype sp_lp = {
    (init_f) sp_init,
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    (pre_run_f) NULL,
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    (event_f) sp_event,
    (revent_f) sp_rev_event,
    (final_f) sp_finalize,
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    (map_f) codes_mapping,
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    sizeof(sp_state),
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};

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static tw_stime rate_to_ns(uint64_t bytes, double MB_p_s);
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static void handle_msg_ready_rev_event(
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    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp);
static void handle_msg_ready_event(
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    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp);
static void handle_msg_start_rev_event(
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    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp);
static void handle_msg_start_event(
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    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp);

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/* collective network calls */
static void simple_wan_collective()
{
/* collectives not supported */
    return;
}

static void simple_wan_collective_rc()
{
/* collectives not supported */
   return;
}

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/* returns pointer to LP information for simplep2p module */
static const tw_lptype* sp_get_lp_type()
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{
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    return(&sp_lp);
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}

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/* returns number of bytes that the simplep2p module will consume in event
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 * messages
 */
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static int sp_get_msg_sz(void)
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{
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    return(sizeof(sp_message));
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}

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static double * parse_mat(char * buf, int *nvals_first, int *nvals_total, int is_tri_mat){
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    int bufn = 128;
    double *vals = malloc(bufn*sizeof(double));

    *nvals_first = 0;
    *nvals_total = 0;

    /* parse the files by line */ 
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    int line_ct, line_ct_prev = 0;
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    char * line_save;
    char * line = strtok_r(buf, "\r\n", &line_save);
    while (line != NULL){
        line_ct = 0;
        char * tok_save;
        char * tok = strtok_r(line, " \t", &tok_save);
        while (tok != NULL){
            if (line_ct + *nvals_total >= bufn){
                bufn<<=1;
                vals = realloc(vals, bufn*sizeof(double));
            }
            vals[line_ct+*nvals_total] = atof(tok);
            line_ct++;
            tok = strtok_r(NULL, " \t", &tok_save);
        }
        /* first line check - number of tokens = the matrix dim */
        if (*nvals_first == 0) {
            *nvals_first = line_ct;
        }
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        else if (is_tri_mat && line_ct != line_ct_prev-1){
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            fprintf(stderr, "ERROR: tokens in line don't match triangular matrix format\n");
            exit(1);
        }
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        else if (!is_tri_mat && line_ct != line_ct_prev){
            fprintf(stderr, "ERROR: tokens in line don't match square matrix format\n");
            exit(1);
        }
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        *nvals_total += line_ct;
        line_ct_prev = line_ct;
        line = strtok_r(NULL, "\r\n", &line_save);
    }
    return vals;
}

static void fill_tri_mat(int N, double *mat, double *tri){
    int i, j, p = 0;
    /* first fill in triangular mat entries */
    for (i = 0; i < N; i++){
        double *row = mat + i*N;
        row[i] = 0.0;
        for (j = i+1; j < N; j++){
            row[j] = tri[p++];
        }
    }
    /* now fill in remaining entries (basically a transpose) */
    for (i = 1; i < N; i++){
        for (j = 0; j < i; j++){
            mat[i*N+j] = mat[j*N+i];
        }
    }
}

/* lets caller specify model parameters to use */
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static void sp_set_params(
        const char      * latency_fname,
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        const char      * bw_fname,
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        simplep2p_param * params){
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    long int fsize_s, fsize_b;
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    /* TODO: make this a run-time option */
    int is_tri_mat = 0;
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    /* slurp the files */
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    FILE *sf = fopen(latency_fname, "r");
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    FILE *bf = fopen(bw_fname, "r");
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    if (!sf)
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        tw_error(TW_LOC, "simplep2p: unable to open %s", latency_fname);
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    if (!bf)
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        tw_error(TW_LOC, "simplep2p: unable to open %s", bw_fname);
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    fseek(sf, 0, SEEK_END);
    fsize_s = ftell(sf);
    fseek(sf, 0, SEEK_SET);
    fseek(bf, 0, SEEK_END);
    fsize_b = ftell(bf);
    fseek(bf, 0, SEEK_SET);
    char *sbuf = malloc(fsize_s+1);
    sbuf[fsize_s] = '\0';
    char *bbuf = malloc(fsize_b+1);
    bbuf[fsize_b] = '\0';
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    assert(fread(sbuf, 1, fsize_s, sf) == fsize_s);
    assert(fread(bbuf, 1, fsize_b, bf) == fsize_b);
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    fclose(sf);
    fclose(bf);

    int nvals_first_s, nvals_first_b, nvals_total_s, nvals_total_b;

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    double *latency_tmp = parse_mat(sbuf, &nvals_first_s, 
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            &nvals_total_s, is_tri_mat);
    double *bw_tmp = parse_mat(bbuf, &nvals_first_b, &nvals_total_b, is_tri_mat);
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    /* convert tri mat into a regular mat */
    assert(nvals_first_s == nvals_first_b);
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    params->mat_len = nvals_first_s + ((is_tri_mat) ? 1 : 0);
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    if (is_tri_mat){
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        params->net_latency_ns_table = 
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            malloc(params->mat_len*params->mat_len*sizeof(double));
        params->net_bw_mbps_table = 
            malloc(params->mat_len*params->mat_len*sizeof(double));
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        fill_tri_mat(params->mat_len, params->net_latency_ns_table, latency_tmp);
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        fill_tri_mat(params->mat_len, params->net_bw_mbps_table, bw_tmp);
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        free(latency_tmp);
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        free(bw_tmp);
    }
    else{
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        params->net_latency_ns_table = latency_tmp;
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        params->net_bw_mbps_table = bw_tmp;
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    }
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    /* done */
}

/* report network statistics */
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static void sp_report_stats()
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{
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   /* TODO: Do we have some simplep2p statistics to report like we have for torus and dragonfly? */
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   return;
}
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static void sp_init(
    sp_state * ns,
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    tw_lp * lp)
{
    uint32_t h1 = 0, h2 = 0;
    memset(ns, 0, sizeof(*ns));

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    bj_hashlittle2(LP_METHOD_NM, strlen(LP_METHOD_NM), &h1, &h2);
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    sp_magic = h1+h2;
    /* printf("\n sp_magic %d ", sp_magic); */
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    ns->anno = codes_mapping_get_annotation_by_lpid(lp->gid);
    if (ns->anno == NULL)
        ns->params = &all_params[num_params-1];
    else{
        int id = configuration_get_annotation_index(ns->anno, anno_map);
        ns->params = &all_params[id];
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    }

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    /* inititalize global logical ID w.r.t. annotation */
    ns->id = codes_mapping_get_lp_relative_id(lp->gid, 0, 1);

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    /* all devices are idle to begin with */
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    ns->send_next_idle = malloc(ns->params->num_lps * 
            sizeof(ns->send_next_idle));
    ns->recv_next_idle = malloc(ns->params->num_lps * 
            sizeof(ns->recv_next_idle));
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    tw_stime st = tw_now(lp);
    int i;
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    for (i = 0; i < ns->params->num_lps; i++){
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        ns->send_next_idle[i] = st;
        ns->recv_next_idle[i] = st;
    }

    for (i = 0; i < CATEGORY_MAX; i++){
        ns->idle_times_cat[i].send_next_idle_all = 0.0;
        ns->idle_times_cat[i].send_prev_idle_all = 0.0;
        ns->idle_times_cat[i].recv_next_idle_all = 0.0;
        ns->idle_times_cat[i].recv_prev_idle_all = 0.0;
        ns->idle_times_cat[i].category[0] = '\0';
    }

    return;
}

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static void sp_event(
    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp)
{
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    assert(m->magic == sp_magic);
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    switch (m->event_type)
    {
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        case SP_MSG_START:
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            handle_msg_start_event(ns, b, m, lp);
            break;
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        case SP_MSG_READY:
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            handle_msg_ready_event(ns, b, m, lp);
            break;
        default:
            assert(0);
            break;
    }
}

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static void sp_rev_event(
    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp)
{
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    assert(m->magic == sp_magic);
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    switch (m->event_type)
    {
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        case SP_MSG_START:
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            handle_msg_start_rev_event(ns, b, m, lp);
            break;
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        case SP_MSG_READY:
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            handle_msg_ready_rev_event(ns, b, m, lp);
            break;
        default:
            assert(0);
            break;
    }

    return;
}

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static void sp_finalize(
    sp_state * ns,
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    tw_lp * lp)
{
    /* first need to add last known active-range times (they aren't added 
     * until afterwards) */ 
    int i;
    for (i = 0; 
            i < CATEGORY_MAX && strlen(ns->idle_times_cat[i].category) > 0; 
            i++){
        category_idles *id = ns->idle_times_cat + i;
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        mn_stats       *st = ns->sp_stats_array + i;
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        st->send_time += id->send_next_idle_all - id->send_prev_idle_all;
        st->recv_time += id->recv_next_idle_all - id->recv_prev_idle_all;
    }

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    model_net_print_stats(lp->gid, &ns->sp_stats_array[0]);
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    return;
}

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int sp_get_magic()
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{
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  return sp_magic;
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}

/* convert MiB/s and bytes to ns */
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static tw_stime rate_to_ns(uint64_t bytes, double MB_p_s)
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{
    tw_stime time;

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

    return(time);
}

/* reverse computation for msg ready event */
static void handle_msg_ready_rev_event(
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    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp)
{
    struct mn_stats* stat;
    category_idles * idles;

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    stat = model_net_find_stats(m->category, ns->sp_stats_array);
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    stat->recv_count--;
    stat->recv_bytes -= m->net_msg_size_bytes;
    stat->recv_time = m->recv_time_saved;

    ns->recv_next_idle[m->src_mn_rel_id] = m->recv_next_idle_saved;
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    idles = sp_get_category_idles(m->category, ns->idle_times_cat);
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    idles->recv_next_idle_all = m->recv_next_idle_all_saved;
    idles->recv_prev_idle_all = m->recv_prev_idle_all_saved;

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    if (m->event_size_bytes && m->is_pull){
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        int net_id = model_net_get_id(LP_METHOD_NM);
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        model_net_event_rc(net_id, lp, m->pull_size);
    }

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    return;
}

/* handler for msg ready event.  This indicates that a message is available
 * to recv, but we haven't checked to see if the recv queue is available yet
 */
static void handle_msg_ready_event(
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    sp_state * ns,
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    tw_bf * b,
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    sp_message * m,
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    tw_lp * lp)
{
    tw_stime recv_queue_time = 0;
    tw_event *e_new;
    struct mn_stats* stat;

    /* get source->me network stats */
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    double bw = sp_get_table_ent(m->src_mn_rel_id, ns->id,
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            ns->params->num_lps, ns->params->net_bw_mbps_table);
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    double latency = sp_get_table_ent(m->src_mn_rel_id, ns->id,
            ns->params->num_lps, ns->params->net_latency_ns_table);
    if (bw <= 0.0 || latency < 0.0){
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        fprintf(stderr, 
                "Invalid link from Rel. id %d to LP %lu (rel. id %d)\n", 
                m->src_mn_rel_id, lp->gid, ns->id);
        abort();
    }

    /* are we available to recv the msg? */
    /* were we available when the transmission was started? */
    if(ns->recv_next_idle[m->src_mn_rel_id] > tw_now(lp))
        recv_queue_time += 
            ns->recv_next_idle[m->src_mn_rel_id] - tw_now(lp);

    /* calculate transfer time based on msg size and bandwidth */
    recv_queue_time += rate_to_ns(m->net_msg_size_bytes, bw);

    /* bump up input queue idle time accordingly */
    m->recv_next_idle_saved = ns->recv_next_idle[m->src_mn_rel_id];
    ns->recv_next_idle[m->src_mn_rel_id] = recv_queue_time + tw_now(lp);

    /* get stats, save state (TODO: smarter save state than param dump?)  */
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    stat = model_net_find_stats(m->category, ns->sp_stats_array);
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    category_idles *idles = 
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        sp_get_category_idles(m->category, ns->idle_times_cat);
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    stat->recv_count++;
    stat->recv_bytes += m->net_msg_size_bytes;
    m->recv_time_saved = stat->recv_time;
    m->recv_next_idle_all_saved = idles->recv_next_idle_all;
    m->recv_prev_idle_all_saved = idles->recv_prev_idle_all;

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#if SIMPLEP2P_DEBUG
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    printf("%d: from_id:%d now: %8.3lf next_idle_recv: %8.3lf\n",
            ns->id, m->src_mn_rel_id,
            tw_now(lp), ns->recv_next_idle[m->src_mn_rel_id]);
    printf("%d: BEFORE all_idles_recv %8.3lf %8.3lf\n",
            ns->id,
            idles->recv_prev_idle_all, idles->recv_next_idle_all);
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#endif
    
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    /* update global idles, recv time */
    if (tw_now(lp) > idles->recv_next_idle_all){
        /* there was an idle period between last idle and now */
        stat->recv_time += 
            idles->recv_next_idle_all - idles->recv_prev_idle_all;
        idles->recv_prev_idle_all = tw_now(lp); 
    }
    if (ns->recv_next_idle[m->src_mn_rel_id] > idles->recv_next_idle_all){
        /* extend the active period (active until at least this request) */
        idles->recv_next_idle_all = ns->recv_next_idle[m->src_mn_rel_id];
    }

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#if SIMPLEP2P_DEBUG
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    printf("%d: AFTER  all_idles_recv %8.3lf %8.3lf",
            ns->id, idles->recv_prev_idle_all, idles->recv_next_idle_all);
    if (m->event_size_bytes>0){
        printf(" - with event\n");
    }
    else{
        printf(" - without event\n");
    }
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#endif
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    /* copy only the part of the message used by higher level */
    if(m->event_size_bytes)
    {
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        //char* tmp_ptr = (char*)m;
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        //tmp_ptr += sp_get_msg_sz();
        void *tmp_ptr = model_net_method_get_edata(SIMPLEP2P, m);
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        if (m->is_pull){
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            int net_id = model_net_get_id(LP_METHOD_NM);
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            model_net_event(net_id, m->category, m->src_gid, m->pull_size,
                    recv_queue_time, m->event_size_bytes, tmp_ptr, 0, NULL, lp);
        }
        else{
            /* schedule event to final destination for when the recv is complete */
            e_new = tw_event_new(m->final_dest_gid, recv_queue_time, lp);
621
            void *m_new = tw_event_data(e_new);
622 623 624
            memcpy(m_new, tmp_ptr, m->event_size_bytes);
            tw_event_send(e_new);
        }
625 626 627 628 629 630 631
    }

    return;
}

/* reverse computation for msg start event */
static void handle_msg_start_rev_event(
632
    sp_state * ns,
633
    tw_bf * b,
634
    sp_message * m,
635 636 637 638 639 640 641 642
    tw_lp * lp)
{
    if(m->local_event_size_bytes > 0)
    {
        codes_local_latency_reverse(lp);
    }

    mn_stats* stat;
643
    stat = model_net_find_stats(m->category, ns->sp_stats_array);
644 645 646 647 648
    stat->send_count--;
    stat->send_bytes -= m->net_msg_size_bytes;
    stat->send_time = m->send_time_saved;

    category_idles *idles = 
649
        sp_get_category_idles(m->category, ns->idle_times_cat);
650 651 652 653 654 655 656 657 658 659 660
    ns->send_next_idle[m->dest_mn_rel_id] = m->send_next_idle_saved;
    idles->send_next_idle_all = m->send_next_idle_all_saved;
    idles->send_prev_idle_all = m->send_prev_idle_all_saved;

    return;
}

/* handler for msg start event; this indicates that the caller is trying to
 * transmit a message through this NIC
 */
static void handle_msg_start_event(
661
    sp_state * ns,
662
    tw_bf * b,
663
    sp_message * m,
664 665 666
    tw_lp * lp)
{
    tw_event *e_new;
667
    sp_message *m_new;
668 669
    tw_stime send_queue_time = 0;
    mn_stats* stat;
670
    int mapping_rep_id, mapping_offset, dummy;
671
    tw_lpid dest_id;
672
    char lp_group_name[MAX_NAME_LENGTH];
673 674
    int total_event_size;
    int dest_rel_id;
675
    double bw, latency;
676

677
    total_event_size = model_net_get_msg_sz(SIMPLEP2P) + m->event_size_bytes +
678
        m->local_event_size_bytes;
679

680
    dest_id = model_net_find_local_device(SIMPLEP2P, ns->anno, 0,
681
            m->final_dest_gid);
682
    dest_rel_id = codes_mapping_get_lp_relative_id(dest_id, 0, 0);
683 684 685
    m->dest_mn_rel_id = dest_rel_id;

    /* grab the link params */
686
    bw = sp_get_table_ent(ns->id, dest_rel_id,
687
            ns->params->num_lps, ns->params->net_bw_mbps_table);
688 689 690
    latency = sp_get_table_ent(ns->id, dest_rel_id,
            ns->params->num_lps, ns->params->net_latency_ns_table);
    if (bw <= 0.0 || latency < 0.0){
691 692 693 694 695 696 697
        fprintf(stderr, 
                "Invalid link from LP %lu (rel. id %d) to LP %lu (rel. id %d)\n", 
                lp->gid, ns->id, dest_id, dest_rel_id);
        abort();
    }

    /* calculate send time stamp */
698
    send_queue_time = 0.0; /* net msg latency cost (negligible for this model) */
699 700 701 702 703 704 705 706 707 708 709 710
    /* bump up time if the NIC send queue isn't idle right now */
    if(ns->send_next_idle[dest_rel_id] > tw_now(lp))
        send_queue_time += ns->send_next_idle[dest_rel_id] - tw_now(lp);

    /* move the next idle time ahead to after this transmission is
     * _complete_ from the sender's perspective 
     */ 
    m->send_next_idle_saved = ns->send_next_idle[dest_rel_id];
    ns->send_next_idle[dest_rel_id] = send_queue_time + tw_now(lp) +
        rate_to_ns(m->net_msg_size_bytes, bw);

    /* get stats, save state (TODO: smarter save state than param dump?)  */
711
    stat = model_net_find_stats(m->category, ns->sp_stats_array);
712
    category_idles *idles = 
713
        sp_get_category_idles(m->category, ns->idle_times_cat);
714 715 716 717 718 719 720 721
    stat->send_count++;
    stat->send_bytes += m->net_msg_size_bytes;
    m->send_time_saved = stat->send_time;
    m->send_next_idle_all_saved = idles->send_next_idle_all;
    m->send_prev_idle_all_saved = idles->send_prev_idle_all;
    if(stat->max_event_size < total_event_size)
        stat->max_event_size = total_event_size;

722
#if SIMPLEP2P_DEBUG
723 724 725 726 727
    printf("%d: to_id:%d now: %8.3lf next_idle_send: %8.3lf\n",
            ns->id, dest_rel_id,
            tw_now(lp), ns->send_next_idle[dest_rel_id]);
    printf("%d: BEFORE all_idles_send %8.3lf %8.3lf\n",
            ns->id, idles->send_prev_idle_all, idles->send_next_idle_all);
728
#endif
729 730 731 732 733 734 735 736 737 738 739 740

    /* update global idles, send time */
    if (tw_now(lp) > idles->send_next_idle_all){
        /* there was an idle period between last idle and now */
        stat->send_time += idles->send_next_idle_all - idles->send_prev_idle_all;
        idles->send_prev_idle_all = tw_now(lp); 
    }
    if (ns->send_next_idle[dest_rel_id] > idles->send_next_idle_all){
        /* extend the active period (active until at least this request) */
        idles->send_next_idle_all = ns->send_next_idle[dest_rel_id];
    }

741
#if SIMPLEP2P_DEBUG
742 743 744 745 746 747 748 749
    printf("%d: AFTER  all_idles_send %8.3lf %8.3lf",
            ns->id, idles->send_prev_idle_all, idles->send_next_idle_all);
    if (m->local_event_size_bytes>0){
        printf(" - with local event\n");
    }
    else{
        printf(" - without local event\n");
    }
750
#endif
751 752 753

    /* create new event to send msg to receiving NIC */
//    printf("\n msg start sending to %d ", dest_id);
754 755 756
    void *m_data;
    //e_new = tw_event_new(dest_id, send_queue_time, lp);
    //m_new = tw_event_data(e_new);
757 758
    e_new = model_net_method_event_new(dest_id, send_queue_time+latency, lp,
            SIMPLEP2P, (void**)&m_new, &m_data);
759 760 761 762

    /* copy entire previous message over, including payload from user of
     * this module
     */
763 764
    //memcpy(m_new, m, m->event_size_bytes + sp_get_msg_sz());
    memcpy(m_new, m, sizeof(sp_message));
765
    if (m->event_size_bytes){
766
        memcpy(m_data, model_net_method_get_edata(SIMPLEP2P, m),
767 768
                m->event_size_bytes);
    }
769
    m_new->event_type = SP_MSG_READY;
770 771 772 773 774 775 776 777 778
    m_new->src_mn_rel_id = ns->id;
    
    tw_event_send(e_new);

    /* if there is a local event to handle, then create an event for it as
     * well
     */
    if(m->local_event_size_bytes > 0)
    {
779
        //char* local_event;
780 781 782 783

        e_new = tw_event_new(m->src_gid, send_queue_time+codes_local_latency(lp), lp);
        m_new = tw_event_data(e_new);

784
        void * m_loc = (char*) model_net_method_get_edata(SIMPLEP2P, m) +
785 786
            m->event_size_bytes;
         //local_event = (char*)m;
787
         //local_event += sp_get_msg_sz() + m->event_size_bytes;         	 
788
        /* copy just the local event data over */
789
        memcpy(m_new, m_loc, m->local_event_size_bytes);
790 791 792 793 794 795 796
        tw_event_send(e_new);
    }
    return;
}

/* Model-net function calls */

797 798 799
/*This method will serve as an intermediate layer between simplep2p and modelnet. 
 * It takes the packets from modelnet layer and calls underlying simplep2p methods*/
static tw_stime simplep2p_packet_event(
800 801 802 803 804 805
        char* category,
        tw_lpid final_dest_lp,
        uint64_t packet_size,
        int is_pull,
        uint64_t pull_size, /* only used when is_pull == 1 */
        tw_stime offset,
806
        const mn_sched_params *sched_params,
807 808 809 810
        int remote_event_size,
        const void* remote_event,
        int self_event_size,
        const void* self_event,
811
        tw_lpid src_lp,
812 813
        tw_lp *sender,
        int is_last_pckt)
814 815 816
{
     tw_event * e_new;
     tw_stime xfer_to_nic_time;
817
     sp_message * msg;
818 819 820 821
     char* tmp_ptr;

     xfer_to_nic_time = codes_local_latency(sender);

822
#if SIMPLEP2P_DEBUG
823
    printf("%lu: final %lu packet sz %d remote sz %d self sz %d is_last_pckt %d latency %lf\n",
824
            (src_lp - 1) / 2, final_dest_lp, packet_size, 
825 826
            remote_event_size, self_event_size, is_last_pckt,
            xfer_to_nic_time+offset);
827
#endif
828

829
     e_new = model_net_method_event_new(sender->gid, xfer_to_nic_time+offset,
830
             sender, SIMPLEP2P, (void**)&msg, (void**)&tmp_ptr);
831 832
     strcpy(msg->category, category);
     msg->final_dest_gid = final_dest_lp;
833
     msg->src_gid = src_lp;
834
     msg->magic = sp_get_magic();
835 836 837
     msg->net_msg_size_bytes = packet_size;
     msg->event_size_bytes = 0;
     msg->local_event_size_bytes = 0;
838
     msg->event_type = SP_MSG_START;
839 840
     msg->is_pull = is_pull;
     msg->pull_size = pull_size;
841

842 843
    //printf("\n Sending to LP %d msg magic %d ", (int)dest_id, sp_get_magic()); 
     /*Fill in simplep2p information*/     
844 845 846 847 848 849 850 851 852 853 854 855 856 857
     if(is_last_pckt) /* Its the last packet so pass in remote event information*/
      {
       if(remote_event_size)
	 {
           msg->event_size_bytes = remote_event_size;
           memcpy(tmp_ptr, remote_event, remote_event_size);
           tmp_ptr += remote_event_size;
	 }
       if(self_event_size)
       {
	   msg->local_event_size_bytes = self_event_size;
	   memcpy(tmp_ptr, self_event, self_event_size);
	   tmp_ptr += self_event_size;
       }
858
      // printf("\n Last packet size: %d ", sp_get_msg_sz() + remote_event_size + self_event_size);
859 860 861 862 863
      }
     tw_event_send(e_new);
     return xfer_to_nic_time;
}

864 865
static void sp_read_config(const char * anno, simplep2p_param *p){
    char latency_file[MAX_NAME_LENGTH];
866 867 868
    char bw_file[MAX_NAME_LENGTH];
    int rc;
    rc = configuration_get_value_relpath(&config, "PARAMS", 
869
            "net_latency_ns_file", anno, latency_file, MAX_NAME_LENGTH);
870 871 872
    if (rc == 0){
        if (anno == NULL)
            tw_error(TW_LOC,
873
                    "simplep2p: unable to read PARAMS:net_latency_ns_file");
874 875
        else
            tw_error(TW_LOC,
876
                    "simplep2p: unable to read PARAMS:net_latency_ns_file@%s",
877 878 879 880 881 882 883
                    anno);
    }
    rc = configuration_get_value_relpath(&config, "PARAMS", "net_bw_mbps_file",
            anno, bw_file, MAX_NAME_LENGTH);
    if (rc == 0){
        if (anno == NULL)
            tw_error(TW_LOC,
884
                    "simplep2p: unable to read PARAMS:net_bw_mbps_file");
885 886
        else
            tw_error(TW_LOC,
887
                    "simplep2p: unable to read PARAMS:net_bw_mbps_file@%s",
888 889 890 891
                    anno);
    }
    p->num_lps = codes_mapping_get_lp_count(NULL, 0,
            LP_CONFIG_NM, anno, 0);
892
    sp_set_params(latency_file, bw_file, p);
893
    if (p->mat_len != p->num_lps){
894 895
        tw_error(TW_LOC, "simplep2p config matrix doesn't match the "
                "number of simplep2p LPs (%d vs. %d)\n",
896 897 898 899
                p->mat_len, p->num_lps);
    }
}

900
static void sp_configure(){
901 902 903 904 905
    anno_map = codes_mapping_get_lp_anno_map(LP_CONFIG_NM);
    assert(anno_map);
    num_params = anno_map->num_annos + (anno_map->has_unanno_lp > 0);
    all_params = malloc(num_params * sizeof(*all_params));
    for (uint64_t i = 0; i < anno_map->num_annos; i++){
906
        sp_read_config(anno_map->annotations[i], &all_params[i]);
907 908
    }
    if (anno_map->has_unanno_lp > 0){
909
        sp_read_config(NULL, &all_params[anno_map->num_annos]);
910
    }
911 912
}

913
static void simplep2p_packet_event_rc(tw_lp *sender)
914 915 916 917 918
{
    codes_local_latency_reverse(sender);
    return;
}

919
static tw_lpid sp_find_local_device(
920 921 922
        const char * annotation,
        int ignore_annotations,
        tw_lp *sender)
923
{
924 925
     char lp_group_name[MAX_NAME_LENGTH];
     int mapping_rep_id, mapping_offset, dummy;
926 927
     tw_lpid dest_id;

928 929
     // TODO: don't ignore annotation
     codes_mapping_get_lp_info(sender->gid, lp_group_name, &dummy, NULL, &dummy, NULL, &mapping_rep_id, &mapping_offset);
930 931
     codes_mapping_get_lp_id(lp_group_name, LP_CONFIG_NM, annotation,
             ignore_annotations, mapping_rep_id, mapping_offset, &dest_id);
932 933 934 935

    return(dest_id);
}

936
static double sp_get_table_ent(
937 938 939 940 941 942
        int      from_id, 
        int      to_id,
        int      num_lps,
        double * table){
    // TODO: if a tri-matrix, then change the addressing
    return table[from_id * num_lps + to_id]; 
943 944 945
}

/* category lookup (more or less copied from model_net_find_stats) */
946
static category_idles* sp_get_category_idles(
947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
        char * category, category_idles *idles){
    int i;
    int new_flag = 0;
    int found_flag = 0;

    for(i=0; i<CATEGORY_MAX; i++) {
        if(strlen(idles[i].category) == 0) {
            found_flag = 1;
            new_flag = 1;
            break;
        }
        if(strcmp(category, idles[i].category) == 0) {
            found_flag = 1;
            new_flag = 0;
            break;
        }
    }
    assert(found_flag);

    if(new_flag) {
        strcpy(idles[i].category, category);
    }
    return &idles[i];
}

/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ft=c ts=8 sts=4 sw=4 expandtab
 */