simplep2p.c 29 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14
/*
 * 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"
15
#include "codes/model-net-lp.h"
16 17
#include "codes/codes_mapping.h"
#include "codes/codes.h"
18
#include "codes/net/simplep2p.h"
19 20 21 22

#define CATEGORY_NAME_MAX 16
#define CATEGORY_MAX 12

23
#define SIMPLEP2P_DEBUG 0
24

25 26
#define LP_CONFIG_NM (model_net_lp_config_names[SIMPLEP2P])
#define LP_METHOD_NM (model_net_method_names[SIMPLEP2P])
27

28 29
// parameters for simplep2p configuration
struct simplep2p_param
30
{
31
    double * net_latency_ns_table;
32
    double * net_bw_mbps_table;
33

34 35 36
    int mat_len;
    int num_lps;
};
37
typedef struct simplep2p_param simplep2p_param;
38

39 40
/*Define simplep2p data types and structs*/
typedef struct sp_state sp_state;
41 42 43 44

typedef struct category_idles_s category_idles;

struct category_idles_s{
45
    /* each simplep2p "NIC" actually has N connections, so we need to track
46 47 48 49 50 51 52 53
     * 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];
};

54
struct sp_state
55 56 57 58 59
{
    /* next idle times for network card, both inbound and outbound */
    tw_stime *send_next_idle;
    tw_stime *recv_next_idle;

60
    const char * anno;
61
    const simplep2p_param * params;
62

63 64
    int id; /* logical id for matrix lookups */

65
    /* Each simplep2p "NIC" actually has N connections, so we need to track
66
     * idle times across all of them to correctly do stats.
67
     * Additionally need to track different idle times across different
68 69 70
     * categories */
    category_idles idle_times_cat[CATEGORY_MAX];

71
    struct mn_stats sp_stats_array[CATEGORY_MAX];
72 73
};

74
/* annotation-specific parameters (unannotated entry occurs at the
75 76
 * last index) */
static uint64_t                  num_params = 0;
77
static simplep2p_param         * all_params = NULL;
78
static const config_anno_map_t * anno_map   = NULL;
79

80
static int sp_magic = 0;
81

82 83
/* returns a pointer to the lptype struct to use for simplep2p LPs */
static const tw_lptype* sp_get_lp_type(void);
84 85

/* set model parameters:
86
 * - latency_fname - path containing triangular matrix of net latencies, in ns
87
 * - bw_fname      - path containing triangular matrix of bandwidths in MB/s.
88
 * note that this merely stores the files, they will be parsed later
89
 */
90 91
static void sp_set_params(
        const char      * latency_fname,
92
        const char      * bw_fname,
93
        simplep2p_param * params);
94

95
static void sp_configure();
96 97

/* retrieve the size of the portion of the event struct that is consumed by
98
 * the simplep2p module.  The caller should add this value to the size of
99 100
 * its own event structure to get the maximum total size of a message.
 */
101
static int sp_get_msg_sz(void);
102

103 104
/* Returns the simplep2p magic number */
static int sp_get_magic();
105

106
/* given two simplep2p logical ids, do matrix lookups to get the point-to-point
107
 * latency/bandwidth */
108
static double sp_get_table_ent(
109
        int      from_id,
110
        int      to_id,
111
	int	 is_outgoing,
112 113
        int      num_lps,
        double * table);
114 115

/* category lookup */
116
static category_idles* sp_get_category_idles(
117 118
        char * category, category_idles *idles);

119 120 121 122 123 124
/* collective network calls */
static void simple_wan_collective();

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

125 126
/* Issues a simplep2p packet event call */
static tw_stime simplep2p_packet_event(
127 128
        model_net_request const * req,
        uint64_t message_offset,
129 130
        uint64_t packet_size,
        tw_stime offset,
131 132 133
        mn_sched_params const * sched_params,
        void const * remote_event,
        void const * self_event,
134 135
        tw_lp *sender,
        int is_last_pckt);
136

137
static void simplep2p_packet_event_rc(tw_lp *sender);
138

139
static void sp_report_stats();
140 141

/* data structure for model-net statistics */
142
struct model_net_method simplep2p_method =
143
{
144
    .mn_configure = sp_configure,
145
    .mn_register = NULL,
146 147
    .model_net_method_packet_event = simplep2p_packet_event,
    .model_net_method_packet_event_rc = simplep2p_packet_event_rc,
148 149
    .model_net_method_recv_msg_event = NULL,
    .model_net_method_recv_msg_event_rc = NULL,
150 151 152
    .mn_get_lp_type = sp_get_lp_type,
    .mn_get_msg_sz = sp_get_msg_sz,
    .mn_report_stats = sp_report_stats,
153
    .mn_collective_call = simple_wan_collective,
154 155 156 157 158
    .mn_collective_call_rc = simple_wan_collective_rc,
    .mn_sample_fn = NULL,
    .mn_sample_rc_fn = NULL,
    .mn_sample_init_fn = NULL,
    .mn_sample_fini_fn = NULL
159 160
};

161 162
static void sp_init(
    sp_state * ns,
163
    tw_lp * lp);
164 165
static void sp_event(
    sp_state * ns,
166
    tw_bf * b,
167
    sp_message * m,
168
    tw_lp * lp);
169 170
static void sp_rev_event(
    sp_state * ns,
171
    tw_bf * b,
172
    sp_message * m,
173
    tw_lp * lp);
174 175
static void sp_finalize(
    sp_state * ns,
176 177
    tw_lp * lp);

178 179
tw_lptype sp_lp = {
    (init_f) sp_init,
180
    (pre_run_f) NULL,
181 182
    (event_f) sp_event,
    (revent_f) sp_rev_event,
183
    (commit_f) NULL,
184
    (final_f) sp_finalize,
185
    (map_f) codes_mapping,
186
    sizeof(sp_state),
187 188
};

189
static tw_stime rate_to_ns(uint64_t bytes, double MB_p_s);
190
static void handle_msg_ready_rev_event(
191 192
    sp_state * ns,
    sp_message * m,
193 194
    tw_lp * lp);
static void handle_msg_ready_event(
195 196
    sp_state * ns,
    sp_message * m,
197 198
    tw_lp * lp);
static void handle_msg_start_rev_event(
199 200
    sp_state * ns,
    sp_message * m,
201 202
    tw_lp * lp);
static void handle_msg_start_event(
203 204
    sp_state * ns,
    sp_message * m,
205 206
    tw_lp * lp);

207 208 209 210 211 212 213 214 215 216 217 218 219
/* collective network calls */
static void simple_wan_collective()
{
/* collectives not supported */
    return;
}

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

220 221
/* returns pointer to LP information for simplep2p module */
static const tw_lptype* sp_get_lp_type()
222
{
223
    return(&sp_lp);
224 225
}

226
/* returns number of bytes that the simplep2p module will consume in event
227 228
 * messages
 */
229
static int sp_get_msg_sz(void)
230
{
231
    return(sizeof(sp_message));
232 233
}

234
static double * parse_mat(char * buf, int *nvals_first, int *nvals_total, int is_tri_mat){
235 236 237 238 239 240
    int bufn = 128;
    double *vals = malloc(bufn*sizeof(double));

    *nvals_first = 0;
    *nvals_total = 0;

241
    //printf("\n parsing the matrix ");
242
    /* parse the files by line */
243
    int line_ct, line_ct_prev = 0;
244 245 246 247 248 249 250
    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){
251
	    char * val_save;
252 253 254 255
            if (line_ct + *nvals_total >= bufn){
                bufn<<=1;
                vals = realloc(vals, bufn*sizeof(double));
            }
256 257 258 259 260 261 262 263
	    char * val = strtok_r(tok, ",", &val_save);
	    while(val != NULL)
	    {
            	vals[line_ct+*nvals_total] = atof(val);
	        val = strtok_r(NULL, " \t", &val_save);
		line_ct++;
            }
	    tok = strtok_r(NULL, " \t", &tok_save);
264 265 266 267 268
        }
        /* first line check - number of tokens = the matrix dim */
        if (*nvals_first == 0) {
            *nvals_first = line_ct;
        }
269
        else if (is_tri_mat && line_ct != line_ct_prev-1){
270 271 272
            fprintf(stderr, "ERROR: tokens in line don't match triangular matrix format\n");
            exit(1);
        }
273 274 275 276
        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);
        }
277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302
        *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 */
303 304
static void sp_set_params(
        const char      * latency_fname,
305
        const char      * bw_fname,
306
        simplep2p_param * params){
307
    long int fsize_s, fsize_b;
308 309
    /* TODO: make this a run-time option */
    int is_tri_mat = 0;
310 311

    /* slurp the files */
312
    FILE *sf = fopen(latency_fname, "r");
313
    FILE *bf = fopen(bw_fname, "r");
314
    if (!sf)
315
        tw_error(TW_LOC, "simplep2p: unable to open %s", latency_fname);
316
    if (!bf)
317
        tw_error(TW_LOC, "simplep2p: unable to open %s", bw_fname);
318 319
    fseek(sf, 0, SEEK_END);
    fsize_s = ftell(sf);
320
    assert(fsize_s >= 0);
321 322 323
    fseek(sf, 0, SEEK_SET);
    fseek(bf, 0, SEEK_END);
    fsize_b = ftell(bf);
324
    assert(fsize_b >= 0);
325 326 327 328 329
    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';
330 331 332 333
    size_t ret = fread(sbuf, 1, fsize_s, sf);
    assert(ret == (size_t)fsize_s);
    ret = fread(bbuf, 1, fsize_b, bf);
    assert(ret == (size_t)fsize_b);
334 335 336 337 338
    fclose(sf);
    fclose(bf);

    int nvals_first_s, nvals_first_b, nvals_total_s, nvals_total_b;

339
    double *latency_tmp = parse_mat(sbuf, &nvals_first_s,
340 341
            &nvals_total_s, is_tri_mat);
    double *bw_tmp = parse_mat(bbuf, &nvals_first_b, &nvals_total_b, is_tri_mat);
342 343 344

    /* convert tri mat into a regular mat */
    assert(nvals_first_s == nvals_first_b);
345
    params->mat_len = nvals_first_s + ((is_tri_mat) ? 1 : 0);
346
    if (is_tri_mat){
347
        params->net_latency_ns_table =
348
            malloc(2*params->mat_len*params->mat_len*sizeof(double));
349
	params->net_bw_mbps_table =
350 351 352
            malloc(2*params->mat_len*params->mat_len*sizeof(double));

	fill_tri_mat(params->mat_len, params->net_latency_ns_table, latency_tmp);
353
        fill_tri_mat(params->mat_len, params->net_bw_mbps_table, bw_tmp);
354
        free(latency_tmp);
355 356 357
        free(bw_tmp);
    }
    else{
358
        params->net_latency_ns_table = latency_tmp;
359
        params->net_bw_mbps_table = bw_tmp;
360
    }
361 362 363 364
    /* done */
}

/* report network statistics */
365
static void sp_report_stats()
366
{
367
   /* TODO: Do we have some simplep2p statistics to report like we have for torus and dragonfly? */
368 369
   return;
}
370 371
static void sp_init(
    sp_state * ns,
372 373 374 375 376
    tw_lp * lp)
{
    uint32_t h1 = 0, h2 = 0;
    memset(ns, 0, sizeof(*ns));

377
    bj_hashlittle2(LP_METHOD_NM, strlen(LP_METHOD_NM), &h1, &h2);
378 379
    sp_magic = h1+h2;
    /* printf("\n sp_magic %d ", sp_magic); */
380

381 382 383 384 385 386
    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];
387 388
    }

389 390 391
    /* inititalize global logical ID w.r.t. annotation */
    ns->id = codes_mapping_get_lp_relative_id(lp->gid, 0, 1);

392
    /* all devices are idle to begin with */
393
    ns->send_next_idle = malloc(ns->params->num_lps *
394
            sizeof(ns->send_next_idle));
395
    ns->recv_next_idle = malloc(ns->params->num_lps *
396
            sizeof(ns->recv_next_idle));
397 398
    tw_stime st = tw_now(lp);
    int i;
399
    for (i = 0; i < ns->params->num_lps; i++){
400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
        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;
}

415 416
static void sp_event(
    sp_state * ns,
417
    tw_bf * b,
418
    sp_message * m,
419 420
    tw_lp * lp)
{
421
    (void)b;
422
    assert(m->magic == sp_magic);
423 424 425

    switch (m->event_type)
    {
426
        case SP_MSG_START:
427
            handle_msg_start_event(ns, m, lp);
428
            break;
429
        case SP_MSG_READY:
430
            handle_msg_ready_event(ns, m, lp);
431 432 433 434 435 436 437
            break;
        default:
            assert(0);
            break;
    }
}

438 439
static void sp_rev_event(
    sp_state * ns,
440
    tw_bf * b,
441
    sp_message * m,
442 443
    tw_lp * lp)
{
444
    (void)b;
445
    assert(m->magic == sp_magic);
446 447 448

    switch (m->event_type)
    {
449
        case SP_MSG_START:
450
            handle_msg_start_rev_event(ns, m, lp);
451
            break;
452
        case SP_MSG_READY:
453
            handle_msg_ready_rev_event(ns, m, lp);
454 455 456 457 458 459 460 461 462
            break;
        default:
            assert(0);
            break;
    }

    return;
}

463 464
static void sp_finalize(
    sp_state * ns,
465 466
    tw_lp * lp)
{
467 468
    /* first need to add last known active-range times (they aren't added
     * until afterwards) */
469
    int i;
470 471
    for (i = 0;
            i < CATEGORY_MAX && strlen(ns->idle_times_cat[i].category) > 0;
472 473
            i++){
        category_idles *id = ns->idle_times_cat + i;
474
        mn_stats       *st = ns->sp_stats_array + i;
475 476 477 478
        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;
    }

479
    model_net_print_stats(lp->gid, &ns->sp_stats_array[0]);
480 481 482
    return;
}

483
int sp_get_magic()
484
{
485
  return sp_magic;
486 487 488
}

/* convert MiB/s and bytes to ns */
489
static tw_stime rate_to_ns(uint64_t bytes, double MB_p_s)
490 491 492 493 494 495 496 497 498 499 500 501 502 503 504
{
    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(
505 506
    sp_state * ns,
    sp_message * m,
507 508 509 510 511
    tw_lp * lp)
{
    struct mn_stats* stat;
    category_idles * idles;

512
    stat = model_net_find_stats(m->category, ns->sp_stats_array);
513 514 515 516 517
    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;
518
    idles = sp_get_category_idles(m->category, ns->idle_times_cat);
519 520 521
    idles->recv_next_idle_all = m->recv_next_idle_all_saved;
    idles->recv_prev_idle_all = m->recv_prev_idle_all_saved;

522
    if (m->event_size_bytes && m->is_pull){
523
        model_net_event_rc2(lp, &m->event_rc);
524 525
    }

526 527 528 529 530 531 532
    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(
533 534
    sp_state * ns,
    sp_message * m,
535 536 537 538 539 540 541
    tw_lp * lp)
{
    tw_stime recv_queue_time = 0;
    tw_event *e_new;
    struct mn_stats* stat;

    /* get source->me network stats */
542
    double bw = sp_get_table_ent(m->src_mn_rel_id, ns->id,
543
            1, ns->params->num_lps, ns->params->net_bw_mbps_table);
544
    double latency = sp_get_table_ent(m->src_mn_rel_id, ns->id,
545
            1, ns->params->num_lps, ns->params->net_latency_ns_table);
546

547
   // printf("\n LP %d outgoing bandwidth with LP %d is %f ", ns->id, m->src_mn_rel_id, bw);
548
    if (bw <= 0.0 || latency < 0.0){
549 550
        fprintf(stderr,
                "Invalid link from Rel. id %d to LP %llu (rel. id %d)\n",
551
                m->src_mn_rel_id, LLU(lp->gid), ns->id);
552 553 554 555 556 557
        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))
558
        recv_queue_time +=
559 560 561 562 563 564 565 566 567 568
            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?)  */
569
    stat = model_net_find_stats(m->category, ns->sp_stats_array);
570
    category_idles *idles =
571
        sp_get_category_idles(m->category, ns->idle_times_cat);
572 573 574 575 576 577
    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;

578
#if SIMPLEP2P_DEBUG
579 580 581 582 583 584
    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);
585
#endif
586 587 588 589

    /* update global idles, recv time */
    if (tw_now(lp) > idles->recv_next_idle_all){
        /* there was an idle period between last idle and now */
590
        stat->recv_time +=
591
            idles->recv_next_idle_all - idles->recv_prev_idle_all;
592
        idles->recv_prev_idle_all = tw_now(lp);
593 594 595 596 597 598
    }
    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];
    }

599
#if SIMPLEP2P_DEBUG
600 601 602 603 604 605 606 607
    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");
    }
608
#endif
609 610 611 612

    /* copy only the part of the message used by higher level */
    if(m->event_size_bytes)
    {
613
        //char* tmp_ptr = (char*)m;
614 615
        //tmp_ptr += sp_get_msg_sz();
        void *tmp_ptr = model_net_method_get_edata(SIMPLEP2P, m);
616
        if (m->is_pull){
617 618 619 620
            struct codes_mctx mc_dst =
                codes_mctx_set_global_direct(m->src_mn_lp);
            struct codes_mctx mc_src =
                codes_mctx_set_global_direct(lp->gid);
621
            int net_id = model_net_get_id(LP_METHOD_NM);
622
            m->event_rc = model_net_event_mctx(net_id, &mc_src, &mc_dst, m->category,
623 624
                    m->src_gid, m->pull_size, recv_queue_time,
                    m->event_size_bytes, tmp_ptr, 0, NULL, lp);
625 626 627 628
        }
        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);
629
            void *m_new = tw_event_data(e_new);
630 631 632
            memcpy(m_new, tmp_ptr, m->event_size_bytes);
            tw_event_send(e_new);
        }
633 634 635 636 637 638 639
    }

    return;
}

/* reverse computation for msg start event */
static void handle_msg_start_rev_event(
640 641
    sp_state * ns,
    sp_message * m,
642 643 644 645 646 647 648 649
    tw_lp * lp)
{
    if(m->local_event_size_bytes > 0)
    {
        codes_local_latency_reverse(lp);
    }

    mn_stats* stat;
650
    stat = model_net_find_stats(m->category, ns->sp_stats_array);
651 652 653 654
    stat->send_count--;
    stat->send_bytes -= m->net_msg_size_bytes;
    stat->send_time = m->send_time_saved;

655
    category_idles *idles =
656
        sp_get_category_idles(m->category, ns->idle_times_cat);
657 658 659 660 661 662 663 664 665 666 667
    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(
668 669
    sp_state * ns,
    sp_message * m,
670 671 672
    tw_lp * lp)
{
    tw_event *e_new;
673
    sp_message *m_new;
674 675 676 677
    tw_stime send_queue_time = 0;
    mn_stats* stat;
    int total_event_size;
    int dest_rel_id;
678
    double bw, latency;
679

680
    total_event_size = model_net_get_msg_sz(SIMPLEP2P) + m->event_size_bytes +
681
        m->local_event_size_bytes;
682

683
    dest_rel_id = codes_mapping_get_lp_relative_id(m->dest_mn_lp, 0, 0);
684 685 686
    m->dest_mn_rel_id = dest_rel_id;

    /* grab the link params */
687
    bw = sp_get_table_ent(ns->id, dest_rel_id,
688
            0, ns->params->num_lps, ns->params->net_bw_mbps_table);
689
    latency = sp_get_table_ent(ns->id, dest_rel_id,
690
            0, ns->params->num_lps, ns->params->net_latency_ns_table);
691

692
    //printf("\n LP %d incoming bandwidth with LP %d is %f ", ns->id, dest_rel_id, bw);
693
    if (bw <= 0.0 || latency < 0.0){
694 695
        fprintf(stderr,
                "Invalid link from LP %llu (rel. id %d) to LP %llu (rel. id %d)\n",
696
                LLU(lp->gid), ns->id, LLU(m->dest_mn_lp), dest_rel_id);
697 698 699 700
        abort();
    }

    /* calculate send time stamp */
701
    send_queue_time = 0.0; /* net msg latency cost (negligible for this model) */
702 703 704 705 706
    /* 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
707 708
     * _complete_ from the sender's perspective
     */
709 710 711 712 713
    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?)  */
714
    stat = model_net_find_stats(m->category, ns->sp_stats_array);
715
    category_idles *idles =
716
        sp_get_category_idles(m->category, ns->idle_times_cat);
717 718 719 720 721 722 723 724
    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;

725
#if SIMPLEP2P_DEBUG
726 727 728 729 730
    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);
731
#endif
732 733 734 735 736

    /* 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;
737
        idles->send_prev_idle_all = tw_now(lp);
738 739 740 741 742 743
    }
    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];
    }

744
#if SIMPLEP2P_DEBUG
745 746 747 748 749 750 751 752
    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");
    }
753
#endif
754 755

    /* create new event to send msg to receiving NIC */
756
    void *m_data;
757
    e_new = model_net_method_event_new(m->dest_mn_lp, send_queue_time+latency, lp,
758
            SIMPLEP2P, (void**)&m_new, &m_data);
759 760 761 762

    /* copy entire previous message over, including payload from user of
     * this module
     */
763
    memcpy(m_new, m, sizeof(sp_message));
764
    if (m->event_size_bytes){
765
        memcpy(m_data, model_net_method_get_edata(SIMPLEP2P, m),
766 767
                m->event_size_bytes);
    }
768
    m_new->event_type = SP_MSG_READY;
769
    m_new->src_mn_rel_id = ns->id;
770 771
    m_new->dest_mn_rel_id = dest_rel_id;

772 773 774 775 776 777 778
    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
/*This method will serve as an intermediate layer between simplep2p and modelnet.
798 799
 * It takes the packets from modelnet layer and calls underlying simplep2p methods*/
static tw_stime simplep2p_packet_event(
800 801
        model_net_request const * req,
        uint64_t message_offset,
802 803
        uint64_t packet_size,
        tw_stime offset,
804 805 806
        mn_sched_params const * sched_params,
        void const * remote_event,
        void const * self_event,
807 808
        tw_lp *sender,
        int is_last_pckt)
809
{
810 811
    (void)message_offset;
    (void)sched_params;
812 813
     tw_event * e_new;
     tw_stime xfer_to_nic_time;
814
     sp_message * msg;
815 816 817 818
     char* tmp_ptr;

     xfer_to_nic_time = codes_local_latency(sender);

819
#if SIMPLEP2P_DEBUG
820
    printf("%lu: final %lu packet sz %d remote sz %d self sz %d is_last_pckt %d latency %lf\n",
821
            (src_lp - 1) / 2, req->final_dest_lp, packet_size,
822
            req->remote_event_size, req->self_event_size, is_last_pckt,
823
            xfer_to_nic_time+offset);
824
#endif
825

826
     e_new = model_net_method_event_new(sender->gid, xfer_to_nic_time+offset,
827
             sender, SIMPLEP2P, (void**)&msg, (void**)&tmp_ptr);
828 829 830 831
     strcpy(msg->category, req->category);
     msg->final_dest_gid = req->final_dest_lp;
     msg->dest_mn_lp = req->dest_mn_lp;
     msg->src_gid = req->src_lp;
832
     msg->src_mn_lp = sender->gid;
833
     msg->magic = sp_get_magic();
834 835 836
     msg->net_msg_size_bytes = packet_size;
     msg->event_size_bytes = 0;
     msg->local_event_size_bytes = 0;
837
     msg->event_type = SP_MSG_START;
838 839
     msg->is_pull = req->is_pull;
     msg->pull_size = req->pull_size;
840

841 842
    //printf("\n Sending to LP %d msg magic %d ", (int)dest_id, sp_get_magic());
     /*Fill in simplep2p information*/
843 844
     if(is_last_pckt) /* Its the last packet so pass in remote event information*/
      {
845
       if(req->remote_event_size)
846
	 {
847 848 849
           msg->event_size_bytes = req->remote_event_size;
           memcpy(tmp_ptr, remote_event, req->remote_event_size);
           tmp_ptr += req->remote_event_size;
850
	 }
851
       if(req->self_event_size)
852
       {
853 854 855
	   msg->local_event_size_bytes = req->self_event_size;
	   memcpy(tmp_ptr, self_event, req->self_event_size);
	   tmp_ptr += req->self_event_size;
856
       }
857
      // printf("\n Last packet size: %d ", sp_get_msg_sz() + remote_event_size + self_event_size);
858 859 860 861 862
      }
     tw_event_send(e_new);
     return xfer_to_nic_time;
}

863 864
static void sp_read_config(const char * anno, simplep2p_param *p){
    char latency_file[MAX_NAME_LENGTH];
865 866
    char bw_file[MAX_NAME_LENGTH];
    int rc;
867
    rc = configuration_get_value_relpath(&config, "PARAMS",
868
            "net_latency_ns_file", anno, latency_file, MAX_NAME_LENGTH);
869
    if (rc <= 0){
870 871
        if (anno == NULL)
            tw_error(TW_LOC,
872
                    "simplep2p: unable to read PARAMS:net_latency_ns_file");
873 874
        else
            tw_error(TW_LOC,
875
                    "simplep2p: unable to read PARAMS:net_latency_ns_file@%s",
876 877 878 879
                    anno);
    }
    rc = configuration_get_value_relpath(&config, "PARAMS", "net_bw_mbps_file",
            anno, bw_file, MAX_NAME_LENGTH);
880
    if (rc <= 0){
881 882
        if (anno == NULL)
            tw_error(TW_LOC,
883
                    "simplep2p: unable to read PARAMS:net_bw_mbps_file");
884 885
        else
            tw_error(TW_LOC,
886
                    "simplep2p: unable to read PARAMS:net_bw_mbps_file@%s",
887 888 889 890
                    anno);
    }
    p->num_lps = codes_mapping_get_lp_count(NULL, 0,
            LP_CONFIG_NM, anno, 0);
891
    sp_set_params(latency_file, bw_file, p);
892
    if (p->mat_len != (2 * p->num_lps)){
893 894
        tw_error(TW_LOC, "simplep2p config matrix doesn't match the "
                "number of simplep2p LPs (%d vs. %d)\n",
895 896 897 898
                p->mat_len, p->num_lps);
    }
}

899
static void sp_configure(){
900 901 902 903
    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));
904
    for (int i = 0; i < anno_map->num_annos; i++){
905
        sp_read_config(anno_map->annotations[i].ptr, &all_params[i]);
906 907
    }
    if (anno_map->has_unanno_lp > 0){
908
        sp_read_config(NULL, &all_params[anno_map->num_annos]);
909
    }
910 911
}

912
static void simplep2p_packet_event_rc(tw_lp *sender)
913 914 915 916 917
{
    codes_local_latency_reverse(sender);
    return;
}

918
static double sp_get_table_ent(
919
        int      from_id,
920
        int      to_id,
921
	int 	 is_incoming, /* chooses between incoming and outgoing bandwidths */
922 923 924
        int      num_lps,
        double * table){
    // TODO: if a tri-matrix, then change the addressing
925
    return table[2 * from_id * num_lps + 2 * to_id + is_incoming];
926 927 928
}

/* category lookup (more or less copied from model_net_find_stats) */
929
static category_idles* sp_get_category_idles(
930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962
        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
 */