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         struct sockaddr_in rem_addr;
  74
  75         /* Statistics */
  76         pthread_mutex_t mutex;
  77         unsigned long long sent, really_sent, received;
  78 };
  79
  80 /*
  81 struct send_endpoint sepoint[] = {
  82         { .ac = AC_VO, .period_usec=200*MSEC_TO_USEC, .bandwidth_bps = 34*Kbit },
  83         { .ac = AC_VI, .period_usec=25*MSEC_TO_USEC, .bandwidth_bps =  480*Kbit },
  84         { .ac = AC_BE, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  85         { .ac = AC_BK, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  86 //      { .ac = AC_VI, .period_usec=17*MSEC_TO_USEC, .bandwidth_bps =  675*Kbit },
  87 };
  88 */
  89
  90 struct stream streams[MAX_STREAMS];
  91
  92 unsigned int nr_streams = 0;
  93
  94 sem_t sem_thread_finished;
  95
  96 bool exit_flag = false;
  97
  98 void stopper()
  99 {
 100         int i;
 101         exit_flag = true;
 102
 103         /* Interrupt all receivers */
 104         for (i=0; i < AC_NUM; i++) {
 105                 pthread_kill(receivers[i].thread, SIGUSR1);
 106         }
 107 }
 108
 109 void stream_to_text(char *stream_desc, size_t n, struct stream *stream, long long useconds)
 110 {
 111         char buf[3][12];
 112         char real[100];
 113
 114         if (useconds) {
 115                 snprintf(real, sizeof(real), "; real: %s sent %lld (%lld/s), received %lld (%lld/s)",
 116                          bandwidth_to_text(buf[0], (long long)stream->really_sent*stream->packet_size*8*SEC_TO_USEC/useconds),
 117                          stream->sent, stream->sent*SEC_TO_USEC/useconds,
 118                          stream->received, stream->received*SEC_TO_USEC/useconds);
 119         } else {
 120                 real[0]=0;
 121         }
 122
 123         snprintf(stream_desc, n, "%d: %s %s (%d bytes per %s +-%s, %d packets/s)%s",
 124                  stream-streams, ac_to_text[stream->ac], bandwidth_to_text(buf[0], stream->bandwidth_bps),
 125                  stream->packet_size, usec_to_text(buf[1], stream->period_usec),
 126                  usec_to_text(buf[2], stream->jitter*stream->period_usec/100),
 127                  (int)(SEC_TO_USEC/stream->period_usec), real);
 128 }
 129
 130 void save_results(int argc, char *argv[], int useconds)
 131 {
 132         int ac, i, maxi;
 133         const int mini = 3000/opt_granularity_usec;
 134         bool allzeros;
 135         unsigned sum[AC_NUM];
 136         double val;
 137
 138         fprintf(stderr, "Writing data to %s... ", logfname);
 139         fflush(stderr);
 140
 141         fprintf(logfd, "# Invoked as: ");
 142         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 143         fprintf(logfd, "\n");
 144
 145         if (useconds/SEC_TO_USEC != opt_count_sec) {
 146                 fprintf(logfd, "# Data gathered for %d seconds.\n", (int)(useconds/SEC_TO_USEC));
 147         }
 148
 149         for (i = 0; i < nr_streams; i++) {
 150                 char stream_desc[120];
 151                 stream_to_text(stream_desc, sizeof(stream_desc), &streams[i], useconds);
 152                 fprintf(logfd, "# Stream %s\n", stream_desc);
 153         }
 154
 155         /* Find maximal delay */
 156         allzeros = true;
 157         for (maxi = MAX_DELAY_US/opt_granularity_usec - 1; maxi >= 0; maxi--) {
 158                 for (ac = 0; ac < AC_NUM; ac++) {
 159                         if (delay_stats[ac][maxi] != 0) allzeros = false;
 160                 }
 161                 if (!allzeros) break;
 162         }
 163         maxi++;
 164         if (maxi < mini) maxi = mini;
 165
 166         /* Calculate total number of sent packets per AC */
 167         for (ac = 0; ac < AC_NUM; ac++) sum[ac] = 0;
 168         for (i = 0; i < nr_streams; i++) {
 169                 ac = streams[i].ac;
 170                 sum[ac] += streams[i].sent;
 171         }
 172
 173 #if 0
 174         /* Write pdf */
 175         for ( i = 0 ; i < maxi; i++) {
 176                 fprintf(logfd,"\n%f", i*opt_granularity_usec/1000.0);
 177                 for (ac = 0; ac < AC_NUM; ac++) {
 178                         if (sum[ac])
 179                                 val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 180                         else val = -1; /* Don't display this ac */
 181                         fprintf(logfd," %lf", val);
 182                 }
 183         }
 184
 185         fprintf(logfd,"\n\n");
 186 #endif
 187
 188         /* Write PDF */
 189         for (ac = 0; ac < AC_NUM; ac++) {
 190                 unsigned long long integral = 0, last = -1;
 191
 192                 fprintf(logfd,"%f %f\n", 0.0, 0.0);
 193
 194                 if (sum[ac] != 0) {
 195                         i=0;
 196                         while (delay_stats[ac][i] == 0) i++;
 197
 198                         for (i++; i < maxi+1; i++) {
 199                                 if (last != integral) {
 200                                         val = (double)integral*100.0 / sum[ac];
 201                                         fprintf(logfd,"%f %f\n", i*opt_granularity_usec/1000.0, val);
 202                                         last = integral;
 203                                 }
 204                                 if (i>0)
 205                                         integral += delay_stats[ac][i-1];
 206                         }
 207                 }
 208                 fprintf(logfd,"\n\n");
 209         }
 210
 211         fprintf(stderr, "finished.\n");
 212         fclose(logfd);
 213
 214         exit(0);
 215 }
 216
 217 static inline
 218 void timespec_add (struct timespec *sum, const struct timespec *left,
 219               const struct timespec *right)
 220 {
 221         sum->tv_sec = left->tv_sec + right->tv_sec;
 222         sum->tv_nsec = left->tv_nsec + right->tv_nsec;
 223
 224         if (sum->tv_nsec >= 1000000000){
 225                 ++sum->tv_sec;
 226                 sum->tv_nsec -= 1000000000;
 227         }
 228 }
 229
 230 static inline
 231 void timespec_sub (struct timespec *diff, const struct timespec *left,
 232               const struct timespec *right)
 233 {
 234         diff->tv_sec = left->tv_sec - right->tv_sec;
 235         diff->tv_nsec = left->tv_nsec - right->tv_nsec;
 236
 237         if (diff->tv_nsec < 0){
 238                   --diff->tv_sec;
 239                   diff->tv_nsec += 1000000000;
 240         }
 241 }
 242
 243 static inline long long timespec_sub_usec(const struct timespec *left,
 244                                           const struct timespec *right)
 245 {
 246         struct timespec result;
 247         timespec_sub(&result, left, right);
 248         return result.tv_sec * SEC_TO_USEC +
 249                 result.tv_nsec / USEC_TO_NSEC;
 250 }
 251
 252 static inline long long timespec2usec(const struct timespec *ts)
 253 {
 254         return ts->tv_sec * SEC_TO_USEC + ts->tv_nsec / USEC_TO_NSEC;
 255 }
 256
 257
 258 int create_ac_socket(unsigned int ac)
 259 {
 260         int sockfd;
 261         unsigned int yes=1, tos;
 262
 263
 264         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 265         {
 266                 perror("Unable to open socket");
 267                 return -1;
 268         }
 269         if (fcntl(sockfd, F_SETFL, O_NONBLOCK) != 0) {
 270                 perror("set non-blocking socket");
 271                 return -1;
 272         }
 273         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 274                 perror("Unable to set socket");
 275                 return -1;
 276         }
 277
 278
 279         //tos = ((AC_NUM - ac) *2 - 1)*32;
 280         tos = ac_to_tos[ac];
 281         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 282                 perror("Unable to set TOS");
 283                 close(sockfd);
 284                 return -1;
 285         }
 286
 287         return sockfd;
 288 }
 289
 290 void empty_handler()
 291 {
 292 }
 293
 294 void reset_statistics()
 295 {
 296         int i;
 297         /* Mutexes??? */
 298         for (i = 0; i < nr_streams; i++) {
 299                 pthread_mutex_lock(&streams[i].mutex);
 300                 streams[i].sent = 0;
 301                 streams[i].really_sent = 0;
 302                 streams[i].received = 0;
 303                 pthread_mutex_unlock(&streams[i].mutex);
 304         }
 305         pthread_mutex_lock(&delay_stats_mutex);
 306         clock_gettime(CLOCK_MONOTONIC, &reset_timestamp);
 307         memset(delay_stats, 0, sizeof(delay_stats));
 308         pthread_mutex_unlock(&delay_stats_mutex);
 309 }
 310
 311 void* receiver(void* queue)
 312 {
 313         struct msg_t    msg;
 314         struct  sockaddr_in rem_addr;
 315         int     mlen, ret;
 316         unsigned int ac, rem_addr_length;
 317         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 318         long long int min_trans_time;
 319         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 320         fd_set fdset;
 321
 322         min_trans_time = ~0;
 323
 324         block_signals();
 325         set_rt_prio(99);
 326
 327         ac = (int)queue;
 328         rem_addr_length = sizeof(rem_addr);
 329         FD_ZERO(&fdset);
 330         while (!exit_flag) {
 331                 FD_SET(ac_sockfd[ac], &fdset);
 332                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 333                 if (ret < 0) {
 334                         if (errno == EINTR) continue;
 335                         perror("receiver select");
 336                         goto out;
 337                 }
 338                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 339                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 340                 if (mlen < 0) {
 341                         perror("Chyba pri prijimani pozadavku");
 342                         goto out;
 343                 }
 344                 clock_gettime(CLOCK_MONOTONIC,&recv_timestamp);
 345                 send_timestamp = msg.send_timestamp;
 346 /*              server_timestamp = msg.sendback_timestamp; */
 347
 348                 /* Check whether this message was sent after reset_statistics() */
 349
 350                 if (timespec_sub_usec(&send_timestamp, &reset_timestamp) < 0) {
 351                         continue; /* If so, don't count it */
 352                 }
 353
 354                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp);
 355                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 356                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 357
 358                 trans_time_usec /= 2;
 359
 360                 if (trans_time_usec < MAX_DELAY_US) {
 361                         pthread_mutex_lock(&delay_stats_mutex);
 362                         delay_stats[ac][trans_time_usec/opt_granularity_usec]++;
 363                         pthread_mutex_unlock(&delay_stats_mutex);
 364                 }
 365
 366                 receivers[ac].received++;
 367                 pthread_mutex_lock(&streams[msg.stream].mutex);
 368                 streams[msg.stream].received++;
 369                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 370
 371                 /*if (trans_time_nsec < min_trans_time)
 372                         min_trans_time = trans_time_nsec;*/
 373                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 374                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 375                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 376                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 377                          recv_timestamp.tv_nsec, trans_time_msec); */
 378         }
 379 out:
 380         sem_post(&sem_thread_finished);
 381         return NULL;
 382 }
 383
 384 /**
 385  * Send a packet.
 386  *
 387  * @return -1 in case of error, 1 in case of sucessfull send and 0
 388  *         when all buffers are full.
 389  */
 390 static inline int
 391 send_packet(struct stream* stream, union msg_buff* buff)
 392 {
 393         int ret = 1;
 394         while (sendto(ac_sockfd[stream->ac], &buff, stream->packet_size, 0,
 395                       (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) {
 396                 if (errno == EINTR) continue;
 397                 if (errno == EAGAIN) {
 398                         if (opt_wait_for_queue_is_full &&
 399                             !some_queue_is_full &&
 400                             /* We use mutex as atomic test and set */
 401                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 402                                 some_queue_is_full = true;
 403                                 reset_statistics();
 404                         }
 405                         ret = 0;
 406                         break;
 407                 } else {
 408                         perror("Error while sending");
 409                         ret = -1;
 410                         break;
 411                 }
 412         }
 413         return ret;
 414 }
 415
 416 static inline void
 417 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 418 {
 419         struct timespec time_to_wait, current_time, period, interval;
 420         unsigned period_usec = stream->period_usec;
 421
 422         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 423         /* |-------------|     nominal period*/
 424         if (stream->jitter) {
 425                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 426                                                + rand() % (2*period_usec*stream->jitter/100));
 427         } else {
 428                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 429         }
 430         period.tv_sec = 0;
 431
 432         timespec_add(&time_to_wait, last_send_time, &period);
 433         clock_gettime(CLOCK_MONOTONIC,&current_time);
 434         timespec_sub(&interval,&time_to_wait,&current_time);
 435         nanosleep(&interval,NULL);
 436 }
 437
 438
 439 void* sender(void* arg)
 440 {
 441         union msg_buff buff;
 442         unsigned long int seqn;
 443         struct stream* stream = (struct stream*) arg;
 444         char stream_desc[100];
 445         int ret;
 446
 447         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 448         printf("%s\n", stream_desc);
 449
 450         if (stream->bandwidth_bps == 0)
 451                 goto out;
 452
 453         seqn = 0;
 454
 455         block_signals();
 456         set_rt_prio(90-stream->ac);
 457
 458         while (!exit_flag) {
 459
 460 /*              buff.msg.seqn = seqn++; */
 461 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 462                 buff.msg.stream = stream-streams;
 463
 464                 clock_gettime(CLOCK_MONOTONIC,&buff.msg.send_timestamp);
 465
 466                 ret = send_packet(stream, &buff);
 467                 if (ret < 0) {
 468                         goto out;
 469                 }
 470
 471                 pthread_mutex_lock(&stream->mutex);
 472                 stream->sent++;
 473                 if (ret > 0)
 474                         stream->really_sent++;
 475                 pthread_mutex_unlock(&stream->mutex);
 476
 477 #ifdef DEBUG
 478                 printf("%d", stream->ac);
 479                 fflush(stdout);
 480 #endif
 481
 482                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 483         }
 484 out:
 485         sem_post(&sem_thread_finished);
 486         return NULL;
 487 }
 488
 489 static inline void
 490 calc_stream_params(struct stream *stream)
 491 {
 492         int packet_size;
 493         unsigned period_usec;
 494         int bandwidth;
 495         struct hostent* ph;
 496
 497         bandwidth = stream->bandwidth_bps;
 498
 499         if (stream->packet_size) {
 500                 packet_size = stream->packet_size;
 501                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 502                 if (period_usec == 0) period_usec = 1;
 503         } else if (stream->period_usec) {
 504                 period_usec = stream->period_usec;
 505                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 506         } else {
 507                 char buf[200];
 508                 stream_to_text(buf, sizeof(buf), stream, 0);
 509                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 510                 exit(1);
 511         }
 512
 513         if (packet_size < sizeof(struct msg_t)) {
 514                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 515                 exit(1);
 516         }
 517
 518         stream->packet_size = packet_size;
 519         stream->period_usec = period_usec;
 520         stream->jitter = opt_jitter;
 521
 522         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 523
 524         stream->rem_addr.sin_family = AF_INET;
 525         ph = gethostbyname(server_addr);
 526         if (ph)
 527                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 528         else {
 529                 perror("Unknown server");
 530                 exit(1);
 531         }
 532         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 533
 534 }
 535
 536 /**
 537  * Parse -b parameter.
 538  *
 539  * @param params String to parse
 540  *
 541  * @return NULL in case of success, pointer to a problematic character
 542  *         on error.
 543  */
 544 char* parse_bandwidths(char *params)
 545 {
 546         struct stream *sp = &streams[nr_streams];
 547
 548         while (*params && nr_streams < MAX_STREAMS) {
 549                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 550                 int i;
 551                 char *next_char;
 552
 553                 if (strlen(params) < 2)
 554                         return params;
 555                 for (i=0; i<AC_NUM; i++) {
 556                         if (strncmp(params, ac_ids[i], 2) == 0) {
 557                                 sp->ac = i;
 558                                 params+=strlen(ac_ids[i]);
 559                                 break;
 560                         }
 561                 }
 562                 if (i==AC_NUM)
 563                         return params;
 564
 565                 long bw;
 566                 if (*params == ':') {
 567                         params++;
 568
 569                         bw = strtol(params, &next_char, 10);
 570                         if (next_char == params)
 571                                 return params;
 572                         params = next_char;
 573                 } else
 574                         bw = opt_def_bandwidth;
 575
 576                 sp->bandwidth_bps = bw*Kbit;
 577
 578                 long period = 0;
 579                 long packet_size = 0;
 580                 if (*params == '@') {
 581                         params++;
 582                         period = strtol(params, &next_char, 10);
 583                         if (period == 0)
 584                                 return params;
 585                         params = next_char;
 586                 }
 587                 else {
 588                         if (*params == '/') {
 589                                 params++;
 590                                 packet_size = strtol(params, &next_char, 10);
 591                                 if (packet_size == 0)
 592                                         return params;
 593                                 params = next_char;
 594                         } else {
 595                                 packet_size = opt_packet_size;
 596                                 period = opt_def_period_msec;
 597                         }
 598                 }
 599                 sp->period_usec = period*MSEC_TO_USEC;
 600                 sp->packet_size = packet_size;
 601
 602
 603
 604                 if (*params != '\0' && *params != ',')
 605                         return params;
 606                 nr_streams++;
 607                 sp++;
 608                 if (*params == ',')
 609                         params++;
 610         }
 611         return NULL;
 612 }
 613
 614 int main(int argc, char *argv[])
 615 {
 616         int ac, i, rc, seconds;
 617         pthread_attr_t attr;
 618         pthread_t thread;
 619         char opt;
 620
 621
 622         while ((opt = getopt(argc, argv, "B:b:c:g:j:o:qs:T:")) != -1) {
 623                 switch (opt) {
 624                         case 'B':
 625                                 opt_def_bandwidth = atoi(optarg);
 626                                 break;
 627                         case 'b': {
 628                                 char *error;
 629                                 error = parse_bandwidths(optarg);
 630                                 if (error != NULL) {
 631                                         if (*error == '\0')
 632                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 633                                         else
 634                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 635                                         exit(1);
 636                                 }
 637                                 break;
 638                         }
 639                         case 'c':
 640                                 opt_count_sec = atoi(optarg);
 641                                 break;
 642                         case 'g':
 643                                 opt_granularity_usec = atoi(optarg);
 644                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 645                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 646                                         exit(1);
 647                                 }
 648                                 break;
 649                         case 'j':
 650                                 opt_jitter = atoi(optarg);
 651                                 break;
 652                         case 'o':
 653                                 opt_output = optarg;
 654                                 break;
 655                         case 'q':
 656                                 opt_wait_for_queue_is_full = true;
 657                                 break;
 658                         case 's':
 659                                 opt_packet_size = atoi(optarg);
 660                                 break;
 661                         case 'T':
 662                                 opt_def_period_msec = atoi(optarg);
 663                                 break;
 664                         default:
 665                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 666                                 fprintf(stderr, "Options:\n");
 667                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 668                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 669                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 670                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 671                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 672                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 673                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 674                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 675                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 676                                 exit(1);
 677                 }
 678         }
 679         if (opt_packet_size && opt_def_period_msec) {
 680                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 681                 exit(1);
 682         }
 683
 684         if (optind < argc) {
 685                 server_addr = argv[optind];
 686         } else {
 687                 fprintf(stderr, "Expected server address argument\n");
 688                 exit(1);
 689         }
 690
 691         if (nr_streams == 0)
 692                 parse_bandwidths("BE");
 693
 694         pthread_attr_init(&attr);
 695
 696         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 697
 698         if ((logfd = fopen(logfname,"w+")) == NULL) {
 699                 fprintf(stderr,"Can not open %s\n", logfname);
 700                 exit(1);
 701         }
 702         if (signal(SIGTERM, stopper) == SIG_ERR) {
 703                 perror("Error in signal registration");
 704                 exit(1);
 705         }
 706
 707         if (signal(SIGINT, stopper) == SIG_ERR) {
 708                 perror("Signal handler registration error");
 709                 exit(1);
 710         }
 711
 712         struct sigaction sa;
 713         sa.sa_handler = empty_handler;
 714         sa.sa_flags = 0;        /* don't restart syscalls */
 715
 716         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 717                 perror("sigaction error");
 718                 exit(1);
 719         }
 720
 721         sem_init(&sem_thread_finished, 0, 0);
 722
 723         reset_statistics();
 724
 725         /* create four receivers each per AC */
 726         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 727                 ac_sockfd[ac] = create_ac_socket(ac);
 728                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 729                 if (rc) {
 730                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 731                         return 1;
 732                 }
 733         }
 734
 735         /* create sendpoints */
 736         for (i = 0; i < nr_streams; i++) {
 737                 struct stream *s = &streams[i];
 738                 pthread_mutex_init(&s->mutex, NULL);
 739                 calc_stream_params(s);
 740                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 741                 if (rc) {
 742                         fprintf(stderr, "Error while creating sender %d\n",rc);
 743                         return 1;
 744                 }
 745         }
 746
 747         seconds = 0;
 748         while (!exit_flag) {
 749                 sleep(1);
 750                 seconds++;
 751                 fprintf(stderr, "\r%3ds", seconds);
 752                 for (ac = 0; ac < AC_NUM; ac++) {
 753                         int delta = receivers[ac].received - receivers[ac].last_received;
 754                         receivers[ac].last_received = receivers[ac].received;
 755                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 756                 }
 757                 fflush(stderr);
 758                 if (seconds == opt_count_sec)
 759                         stopper();
 760         }
 761
 762         fprintf(stderr, "\nWaiting for threads to finish\n");
 763         /* Wait for all threads to finish */
 764         for (i=0; i < nr_streams + AC_NUM; i++) {
 765                 sem_wait(&sem_thread_finished);
 766         }
 767         struct timespec end_timestamp, measure_length;
 768         clock_gettime(CLOCK_MONOTONIC,&end_timestamp);
 769         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 770
 771         save_results(argc, argv, timespec2usec(&measure_length));
 772
 773         return 0;
 774 }