wme_test/wclient.c

   1 #include <errno.h>
   2 #include <sys/types.h>
   3 #include <sys/socket.h>
   4 #include <netinet/in.h>
   5 #include <arpa/inet.h>
   6 #include <netdb.h>
   7 #include <signal.h>
   8 #include <sys/wait.h>
   9 #include <stdio.h>
  10 #include <unistd.h>
  11 #include <fcntl.h>
  12 #include <time.h>
  13 #include <string.h>
  14 #include <pthread.h>
  15 #include <string.h>
  16 #include <stdlib.h>
  17 #include <stdbool.h>
  18 #include "common.h"
  19 #include <semaphore.h>
  20
  21 #define MAX_STREAMS  10
  22 #define MIN_GRANULARITY 100
  23
  24 unsigned opt_packet_size = 800;
  25 unsigned opt_period_usec = 10*MSEC_TO_USEC;
  26 unsigned opt_jitter = 0;
  27 char    *opt_output = "delay_stats";
  28 unsigned opt_count_sec = 0;
  29 unsigned opt_def_bandwidth = 200;
  30 unsigned opt_def_period_msec = 0;
  31 int opt_granularity_usec = MIN_GRANULARITY;
  32 bool opt_wait_for_queue_is_full; /* Don't gather any statistics until any queue is full */
  33
  34 bool some_queue_is_full = false;
  35 struct timespec reset_timestamp;
  36
  37 /* Locked when some queue is full to prevent multiple resets of
  38    statstics. */
  39 pthread_mutex_t queue_full_mutex = PTHREAD_MUTEX_INITIALIZER;
  40
  41 int ac_sockfd[AC_NUM];
  42
  43 struct receiver {
  44         pthread_t thread;
  45         unsigned received, last_received;
  46 } receivers[AC_NUM];
  47
  48 FILE* logfd;
  49 char* server_addr;
  50 char logfname[100];
  51
  52 /* maximal traffic delay in ms - 10 s*/
  53 #define MAX_DELAY_US 10000000
  54
  55 unsigned delay_stats[AC_NUM][MAX_DELAY_US/MIN_GRANULARITY];
  56 pthread_mutex_t delay_stats_mutex = PTHREAD_MUTEX_INITIALIZER;
  57
  58 /*struct ac_stats[AC_NUM] {
  59    unsigned long int min_trans_time;
  60    unsigned long int sum_trans_time;
  61    struct timespec   recv_timestamp;
  62    struct timespec   send_timestamp;
  63 };*/
  64
  65 struct stream {
  66         /* Input parameters */
  67         enum ac ac;             /*  */
  68         int bandwidth_bps;      /* bits per second */
  69         int jitter;             /* percent */
  70         /* Mulualy exclusive input parameters */
  71         int packet_size;
  72         long period_usec;       /* all time units are in microseconds */
  73
  74         /* Statistics */
  75         pthread_mutex_t mutex;
  76         unsigned long long sent, really_sent, received;
  77 };
  78
  79 /*
  80 struct send_endpoint sepoint[] = {
  81         { .ac = AC_VO, .period_usec=200*MSEC_TO_USEC, .bandwidth_bps = 34*Kbit },
  82         { .ac = AC_VI, .period_usec=25*MSEC_TO_USEC, .bandwidth_bps =  480*Kbit },
  83         { .ac = AC_BE, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  84         { .ac = AC_BK, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  85 //      { .ac = AC_VI, .period_usec=17*MSEC_TO_USEC, .bandwidth_bps =  675*Kbit },
  86 };
  87 */
  88
  89 struct stream streams[MAX_STREAMS];
  90
  91 unsigned int nr_streams = 0;
  92
  93 sem_t sem_thread_finished;
  94
  95 bool exit_flag = false;
  96
  97 void stopper()
  98 {
  99         int i;
 100         exit_flag = true;
 101
 102         /* Interrupt all receivers */
 103         for (i=0; i < AC_NUM; i++) {
 104                 pthread_kill(receivers[i].thread, SIGUSR1);
 105         }
 106 }
 107
 108 void stream_to_text(char *stream_desc, size_t n, struct stream *stream, long long useconds)
 109 {
 110         char buf[3][12];
 111         char real[100];
 112
 113         if (useconds) {
 114                 snprintf(real, sizeof(real), "; real: %s sent %lld (%lld/s), received %lld (%lld/s)",
 115                          bandwidth_to_text(buf[0], (long long)stream->really_sent*stream->packet_size*8*SEC_TO_USEC/useconds),
 116                          stream->sent, stream->sent*SEC_TO_USEC/useconds,
 117                          stream->received, stream->received*SEC_TO_USEC/useconds);
 118         } else {
 119                 real[0]=0;
 120         }
 121
 122         snprintf(stream_desc, n, "%d: %s %s (%d bytes per %s +-%s, %d packets/s)%s",
 123                  stream-streams, ac_to_text[stream->ac], bandwidth_to_text(buf[0], stream->bandwidth_bps),
 124                  stream->packet_size, usec_to_text(buf[1], stream->period_usec),
 125                  usec_to_text(buf[2], stream->jitter*stream->period_usec/100),
 126                  (int)(SEC_TO_USEC/stream->period_usec), real);
 127 }
 128
 129 void save_results(int argc, char *argv[], int useconds)
 130 {
 131         int ac, i, maxi;
 132         const int mini = 3000/opt_granularity_usec;
 133         bool allzeros;
 134         unsigned sum[AC_NUM];
 135         double val;
 136
 137         fprintf(stderr, "Writing data to %s... ", logfname);
 138         fflush(stderr);
 139
 140         fprintf(logfd, "# Invoked as: ");
 141         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 142         fprintf(logfd, "\n");
 143
 144         if (useconds/SEC_TO_USEC != opt_count_sec) {
 145                 fprintf(logfd, "# Data gathered for %d seconds.\n", (int)(useconds/SEC_TO_USEC));
 146         }
 147
 148         for (i = 0; i < nr_streams; i++) {
 149                 char stream_desc[120];
 150                 stream_to_text(stream_desc, sizeof(stream_desc), &streams[i], useconds);
 151                 fprintf(logfd, "# Stream %s\n", stream_desc);
 152         }
 153
 154         /* Find maximal delay */
 155         allzeros = true;
 156         for (maxi = MAX_DELAY_US/opt_granularity_usec - 1; maxi >= 0; maxi--) {
 157                 for (ac = 0; ac < AC_NUM; ac++) {
 158                         if (delay_stats[ac][maxi] != 0) allzeros = false;
 159                 }
 160                 if (!allzeros) break;
 161         }
 162         maxi++;
 163         if (maxi < mini) maxi = mini;
 164
 165         /* Calculate total number of sent packets per AC */
 166         for (ac = 0; ac < AC_NUM; ac++) sum[ac] = 0;
 167         for (i = 0; i < nr_streams; i++) {
 168                 ac = streams[i].ac;
 169                 sum[ac] += streams[i].sent;
 170         }
 171
 172 #if 0
 173         /* Write pdf */
 174         for ( i = 0 ; i < maxi; i++) {
 175                 fprintf(logfd,"\n%f", i*opt_granularity_usec/1000.0);
 176                 for (ac = 0; ac < AC_NUM; ac++) {
 177                         if (sum[ac])
 178                                 val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 179                         else val = -1; /* Don't display this ac */
 180                         fprintf(logfd," %lf", val);
 181                 }
 182         }
 183
 184         fprintf(logfd,"\n\n");
 185 #endif
 186
 187         /* Write PDF */
 188         for (ac = 0; ac < AC_NUM; ac++) {
 189                 unsigned long long integral = 0, last = -1;
 190
 191                 fprintf(logfd,"%f %f\n", 0.0, 0.0);
 192
 193                 if (sum[ac] != 0) {
 194                         i=0;
 195                         while (delay_stats[ac][i] == 0) i++;
 196
 197                         for (i++; i < maxi+1; i++) {
 198                                 if (last != integral) {
 199                                         val = (double)integral*100.0 / sum[ac];
 200                                         fprintf(logfd,"%f %f\n", i*opt_granularity_usec/1000.0, val);
 201                                         last = integral;
 202                                 }
 203                                 if (i>0)
 204                                         integral += delay_stats[ac][i-1];
 205                         }
 206                 }
 207                 fprintf(logfd,"\n\n");
 208         }
 209
 210         fprintf(stderr, "finished.\n");
 211         fclose(logfd);
 212
 213         exit(0);
 214 }
 215
 216 static inline
 217 void timespec_add (struct timespec *sum, const struct timespec *left,
 218               const struct timespec *right)
 219 {
 220         sum->tv_sec = left->tv_sec + right->tv_sec;
 221         sum->tv_nsec = left->tv_nsec + right->tv_nsec;
 222
 223         if (sum->tv_nsec >= 1000000000){
 224                 ++sum->tv_sec;
 225                 sum->tv_nsec -= 1000000000;
 226         }
 227 }
 228
 229 static inline
 230 void timespec_sub (struct timespec *diff, const struct timespec *left,
 231               const struct timespec *right)
 232 {
 233         diff->tv_sec = left->tv_sec - right->tv_sec;
 234         diff->tv_nsec = left->tv_nsec - right->tv_nsec;
 235
 236         if (diff->tv_nsec < 0){
 237                   --diff->tv_sec;
 238                   diff->tv_nsec += 1000000000;
 239         }
 240 }
 241
 242 static inline long long timespec_sub_usec(const struct timespec *left,
 243                                           const struct timespec *right)
 244 {
 245         struct timespec result;
 246         timespec_sub(&result, left, right);
 247         return result.tv_sec * SEC_TO_USEC +
 248                 result.tv_nsec / USEC_TO_NSEC;
 249 }
 250
 251 static inline long long timespec2usec(const struct timespec *ts)
 252 {
 253         return ts->tv_sec * SEC_TO_USEC + ts->tv_nsec / USEC_TO_NSEC;
 254 }
 255
 256
 257 int create_ac_socket(unsigned int ac)
 258 {
 259         int sockfd;
 260         unsigned int yes=1, tos;
 261
 262
 263         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 264         {
 265                 perror("Unable to open socket");
 266                 return -1;
 267         }
 268         if (fcntl(sockfd, F_SETFL, O_NONBLOCK) != 0) {
 269                 perror("set non-blocking socket");
 270                 return -1;
 271         }
 272         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 273                 perror("Unable to set socket");
 274                 return -1;
 275         }
 276
 277
 278         //tos = ((AC_NUM - ac) *2 - 1)*32;
 279         tos = ac_to_tos[ac];
 280         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 281                 perror("Unable to set TOS");
 282                 close(sockfd);
 283                 return -1;
 284         }
 285
 286         return sockfd;
 287 }
 288
 289 void empty_handler()
 290 {
 291 }
 292
 293 void reset_statistics()
 294 {
 295         int i;
 296         /* Mutexes??? */
 297         for (i = 0; i < nr_streams; i++) {
 298                 pthread_mutex_lock(&streams[i].mutex);
 299                 streams[i].sent = 0;
 300                 streams[i].really_sent = 0;
 301                 streams[i].received = 0;
 302                 pthread_mutex_unlock(&streams[i].mutex);
 303         }
 304         pthread_mutex_lock(&delay_stats_mutex);
 305         clock_gettime(CLOCK_MONOTONIC, &reset_timestamp);
 306         memset(delay_stats, 0, sizeof(delay_stats));
 307         pthread_mutex_unlock(&delay_stats_mutex);
 308 }
 309
 310 void* receiver(void* queue)
 311 {
 312         struct msg_t    msg;
 313         struct  sockaddr_in rem_addr;
 314         int     mlen, ret;
 315         unsigned int ac, rem_addr_length;
 316         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 317         long long int min_trans_time;
 318         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 319         fd_set fdset;
 320
 321         min_trans_time = ~0;
 322
 323         block_signals();
 324         set_rt_prio(99);
 325
 326         ac = (int)queue;
 327         rem_addr_length = sizeof(rem_addr);
 328         FD_ZERO(&fdset);
 329         while (!exit_flag) {
 330                 FD_SET(ac_sockfd[ac], &fdset);
 331                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 332                 if (ret < 0) {
 333                         if (errno == EINTR) continue;
 334                         perror("receiver select");
 335                         goto out;
 336                 }
 337                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 338                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 339                 if (mlen < 0) {
 340                         perror("Chyba pri prijimani pozadavku");
 341                         goto out;
 342                 }
 343                 clock_gettime(CLOCK_MONOTONIC,&recv_timestamp);
 344                 send_timestamp = msg.send_timestamp;
 345 /*              server_timestamp = msg.sendback_timestamp; */
 346
 347                 /* Check whether this message was sent after reset_statistics() */
 348
 349                 if (timespec_sub_usec(&send_timestamp, &reset_timestamp) < 0) {
 350                         continue; /* If so, don't count it */
 351                 }
 352
 353                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp);
 354                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 355                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 356
 357                 trans_time_usec /= 2;
 358
 359                 if (trans_time_usec < MAX_DELAY_US) {
 360                         pthread_mutex_lock(&delay_stats_mutex);
 361                         delay_stats[ac][trans_time_usec/opt_granularity_usec]++;
 362                         pthread_mutex_unlock(&delay_stats_mutex);
 363                 }
 364
 365                 receivers[ac].received++;
 366                 pthread_mutex_lock(&streams[msg.stream].mutex);
 367                 streams[msg.stream].received++;
 368                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 369
 370                 /*if (trans_time_nsec < min_trans_time)
 371                         min_trans_time = trans_time_nsec;*/
 372                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 373                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 374                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 375                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 376                          recv_timestamp.tv_nsec, trans_time_msec); */
 377         }
 378 out:
 379         sem_post(&sem_thread_finished);
 380         return NULL;
 381 }
 382
 383 void* sender(void* arg)
 384 {
 385         struct sockaddr_in rem_addr;
 386         union msg_buff buff;
 387         unsigned long int seqn;
 388         struct timespec time_to_wait, current_time, period, interval;
 389         struct hostent* ph;
 390         struct stream* stream = (struct stream*) arg;
 391         int bandwidth;
 392         int packet_size;
 393         unsigned period_usec;
 394         char stream_desc[100];
 395
 396         set_rt_prio(90-stream->ac);
 397
 398         bandwidth = stream->bandwidth_bps;
 399         if (bandwidth == 0) {
 400                 /* Either we are going to measure saturation bandwidth
 401                    or we will return before the main loop. */
 402                 bandwidth = 300*Mbit;
 403         }
 404
 405         if (stream->packet_size) {
 406                 packet_size = stream->packet_size;
 407                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 408                 if (period_usec == 0) period_usec = 1;
 409         } else if (stream->period_usec) {
 410                 period_usec = stream->period_usec;
 411                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 412         } else {
 413                 char buf[200];
 414                 stream_to_text(buf, sizeof(buf), stream, 0);
 415                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 416                 exit(1);
 417         }
 418         stream->packet_size = packet_size;
 419         stream->period_usec = period_usec;
 420         stream->jitter = opt_jitter;
 421
 422         bandwidth = stream->bandwidth_bps;
 423
 424         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 425         printf("%s\n", stream_desc);
 426
 427         if (packet_size < sizeof(struct msg_t)) {
 428                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 429                 exit(1);
 430         }
 431
 432         memset(&rem_addr,0, sizeof(rem_addr));
 433
 434         rem_addr.sin_family = AF_INET;
 435         ph = gethostbyname(server_addr);
 436         if (ph)
 437                 rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 438         else {
 439                 perror("Unknown server");
 440                 exit(1);
 441         }
 442         rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 443         seqn = 0;
 444
 445         block_signals();
 446
 447         if (bandwidth == 0)
 448                 goto out;
 449
 450         while (!exit_flag) {
 451
 452 /*              buff.msg.seqn = seqn; */
 453 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 454                 buff.msg.stream = stream-streams;
 455
 456                 clock_gettime(CLOCK_MONOTONIC,&buff.msg.send_timestamp);
 457
 458                 errno = 0;
 459                 while (sendto(ac_sockfd[stream->ac], &buff, packet_size, 0, \
 460                                 (struct sockaddr*)&rem_addr, sizeof(rem_addr)) < 0) {
 461                                 if (errno == EINTR) continue;
 462                                 if (errno == EAGAIN) {
 463                                         if (opt_wait_for_queue_is_full && !some_queue_is_full && (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 464                                                 some_queue_is_full = true;
 465                                                 reset_statistics();
 466                                         }
 467                                         break;
 468                                 } else {
 469                                         perror("Error while sending");
 470                                         goto out;
 471                                 }
 472                 }
 473
 474 #ifdef DEBUG
 475                 printf("%d", stream->ac);
 476                 fflush(stdout);
 477 #endif
 478                 seqn++;
 479                 pthread_mutex_lock(&stream->mutex);
 480                 stream->sent++;
 481                 if (errno != EAGAIN) {
 482                         stream->really_sent++;
 483                 }
 484                 pthread_mutex_unlock(&stream->mutex);
 485
 486                 /*           |~~~+~~~| jitter interval (width = 2*opt_jitter percentage from period)*/
 487                 /* |-------------|     nominal period*/
 488                 if (opt_jitter) {
 489                         period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-opt_jitter)/100
 490                                                  + rand() % (2*period_usec*opt_jitter/100));
 491                 } else {
 492                         period.tv_nsec = USEC_TO_NSEC*(period_usec);
 493                 }
 494                 period.tv_sec = 0;
 495
 496                 timespec_add(&time_to_wait,&buff.msg.send_timestamp,&period);
 497                 clock_gettime(CLOCK_MONOTONIC,&current_time);
 498                 timespec_sub(&interval,&time_to_wait,&current_time);
 499                 nanosleep(&interval,NULL);
 500         }
 501 out:
 502         sem_post(&sem_thread_finished);
 503         return NULL;
 504 }
 505
 506 char* parse_bandwidths(char *params)
 507 {
 508         struct stream *sp = &streams[nr_streams];
 509
 510         while (*params && nr_streams < MAX_STREAMS) {
 511                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 512                 int i;
 513                 char *next_char;
 514
 515                 if (strlen(params) < 2)
 516                         return params;
 517                 for (i=0; i<AC_NUM; i++) {
 518                         if (strncmp(params, ac_ids[i], 2) == 0) {
 519                                 sp->ac = i;
 520                                 params+=strlen(ac_ids[i]);
 521                                 break;
 522                         }
 523                 }
 524                 if (i==AC_NUM)
 525                         return params;
 526
 527                 long bw;
 528                 if (*params == ':') {
 529                         params++;
 530
 531                         bw = strtol(params, &next_char, 10);
 532                         if (next_char == params)
 533                                 return params;
 534                         params = next_char;
 535                 } else
 536                         bw = opt_def_bandwidth;
 537
 538                 sp->bandwidth_bps = bw*Kbit;
 539
 540                 long period = 0;
 541                 long packet_size = 0;
 542                 if (*params == '@') {
 543                         params++;
 544                         period = strtol(params, &next_char, 10);
 545                         if (period == 0)
 546                                 return params;
 547                         params = next_char;
 548                 }
 549                 else {
 550                         if (*params == '/') {
 551                                 params++;
 552                                 packet_size = strtol(params, &next_char, 10);
 553                                 if (packet_size == 0)
 554                                         return params;
 555                                 params = next_char;
 556                         } else {
 557                                 packet_size = opt_packet_size;
 558                                 period = opt_def_period_msec;
 559                         }
 560                 }
 561                 sp->period_usec = period*MSEC_TO_USEC;
 562                 sp->packet_size = packet_size;
 563
 564
 565
 566                 if (*params != '\0' && *params != ',')
 567                         return params;
 568                 nr_streams++;
 569                 sp++;
 570                 if (*params == ',')
 571                         params++;
 572         }
 573         return NULL;
 574 }
 575
 576 int main(int argc, char *argv[])
 577 {
 578         int ac, i, rc, seconds;
 579         pthread_attr_t attr;
 580         pthread_t thread;
 581         char opt;
 582
 583
 584         while ((opt = getopt(argc, argv, "B:b:c:g:j:o:qs:T:")) != -1) {
 585                 switch (opt) {
 586                         case 'B':
 587                                 opt_def_bandwidth = atoi(optarg);
 588                                 break;
 589                         case 'b': {
 590                                 char *error;
 591                                 error = parse_bandwidths(optarg);
 592                                 if (error != NULL) {
 593                                         if (*error == '\0')
 594                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 595                                         else
 596                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 597                                         exit(1);
 598                                 }
 599                                 break;
 600                         }
 601                         case 'c':
 602                                 opt_count_sec = atoi(optarg);
 603                                 break;
 604                         case 'g':
 605                                 opt_granularity_usec = atoi(optarg);
 606                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 607                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 608                                         exit(1);
 609                                 }
 610                                 break;
 611                         case 'j':
 612                                 opt_jitter = atoi(optarg);
 613                                 break;
 614                         case 'o':
 615                                 opt_output = optarg;
 616                                 break;
 617                         case 'q':
 618                                 opt_wait_for_queue_is_full = true;
 619                                 break;
 620                         case 's':
 621                                 opt_packet_size = atoi(optarg);
 622                                 break;
 623                         case 'T':
 624                                 opt_def_period_msec = atoi(optarg);
 625                                 break;
 626                         default:
 627                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 628                                 fprintf(stderr, "Options:\n");
 629                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 630                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 631                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 632                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 633                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 634                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 635                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 636                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 637                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 638                                 exit(1);
 639                 }
 640         }
 641         if (opt_packet_size && opt_def_period_msec) {
 642                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 643                 exit(1);
 644         }
 645
 646         if (optind < argc) {
 647                 server_addr = argv[optind];
 648         } else {
 649                 fprintf(stderr, "Expected server address argument\n");
 650                 exit(1);
 651         }
 652
 653         reset_statistics();
 654
 655         if (nr_streams == 0)
 656                 parse_bandwidths("BE");
 657
 658         pthread_attr_init(&attr);
 659
 660         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 661
 662         if ((logfd = fopen(logfname,"w+")) == NULL) {
 663                 fprintf(stderr,"Can not open %s\n", logfname);
 664                 exit(1);
 665         }
 666         if (signal(SIGTERM, stopper) == SIG_ERR) {
 667                 perror("Error in signal registration");
 668                 exit(1);
 669         }
 670
 671         if (signal(SIGINT, stopper) == SIG_ERR) {
 672                 perror("Signal handler registration error");
 673                 exit(1);
 674         }
 675
 676         struct sigaction sa;
 677         sa.sa_handler = empty_handler;
 678         sa.sa_flags = 0;        /* don't restart syscalls */
 679
 680         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 681                 perror("sigaction error");
 682                 exit(1);
 683         }
 684
 685         sem_init(&sem_thread_finished, 0, 0);
 686
 687         /* create four receivers each per AC */
 688         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 689                 ac_sockfd[ac] = create_ac_socket(ac);
 690                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 691                 if (rc) {
 692                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 693                         return 1;
 694                 }
 695         }
 696
 697         /* create sendpoints */
 698         for (i = 0; i < nr_streams; i++) {
 699                 pthread_mutex_init(&streams[i].mutex, NULL);
 700                 rc = pthread_create(&thread, &attr, sender, (void*) &streams[i]);
 701                 if (rc) {
 702                         fprintf(stderr, "Error while creating sender %d\n",rc);
 703                         return 1;
 704                 }
 705         }
 706
 707         seconds = 0;
 708         while (!exit_flag) {
 709                 sleep(1);
 710                 seconds++;
 711                 fprintf(stderr, "\r%3ds", seconds);
 712                 for (ac = 0; ac < AC_NUM; ac++) {
 713                         int delta = receivers[ac].received - receivers[ac].last_received;
 714                         receivers[ac].last_received = receivers[ac].received;
 715                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 716                 }
 717                 fflush(stderr);
 718                 if (seconds == opt_count_sec)
 719                         stopper();
 720         }
 721
 722         fprintf(stderr, "\nWaiting for threads to finish\n");
 723         /* Wait for all threads to finish */
 724         for (i=0; i < nr_streams + AC_NUM; i++) {
 725                 sem_wait(&sem_thread_finished);
 726         }
 727         struct timespec end_timestamp, measure_length;
 728         clock_gettime(CLOCK_MONOTONIC,&end_timestamp);
 729         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 730
 731         save_results(argc, argv, timespec2usec(&measure_length));
 732
 733         return 0;
 734 }