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 (long long)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         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 ((ret = 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                 receivers[ac].received++;
 365                 pthread_mutex_lock(&streams[msg.stream].mutex);
 366                 streams[msg.stream].received++;
 367                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 368
 369                 /*if (trans_time_nsec < min_trans_time)
 370                         min_trans_time = trans_time_nsec;*/
 371                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 372                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 373                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 374                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 375                          recv_timestamp.tv_nsec, trans_time_msec); */
 376         }
 377 out:
 378         sem_post(&sem_thread_finished);
 379         return NULL;
 380 }
 381
 382 /**
 383  * Send a packet.
 384  *
 385  * @return -1 in case of error, 1 in case of sucessfull send and 0
 386  *         when all buffers are full.
 387  */
 388 static inline int
 389 send_packet(struct stream* stream, union msg_buff* buff)
 390 {
 391         int ret = 1;
 392         while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0,
 393                       (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) {
 394                 if (errno == EINTR) continue;
 395                 if (errno == EAGAIN) {
 396                         if (opt_wait_for_queue_is_full &&
 397                             !some_queue_is_full &&
 398                             /* We use mutex as atomic test and set */
 399                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 400                                 some_queue_is_full = true;
 401                                 reset_statistics();
 402                         }
 403                         ret = 0;
 404                         break;
 405                 } else {
 406                         perror("Error while sending");
 407                         ret = -1;
 408                         break;
 409                 }
 410         }
 411         return ret;
 412 }
 413
 414 static inline void
 415 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 416 {
 417         struct timespec time_to_wait, current_time, period, interval;
 418         unsigned period_usec = stream->period_usec;
 419
 420         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 421         /* |-------------|     nominal period*/
 422         if (stream->jitter) {
 423                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 424                                                + rand() % (2*period_usec*stream->jitter/100));
 425         } else {
 426                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 427         }
 428         period.tv_sec = 0;
 429
 430         timespec_add(&time_to_wait, last_send_time, &period);
 431         clock_gettime(CLOCK_MONOTONIC,&current_time);
 432         timespec_sub(&interval,&time_to_wait,&current_time);
 433         nanosleep(&interval,NULL);
 434 }
 435
 436
 437 void* sender(void* arg)
 438 {
 439         union msg_buff buff;
 440         unsigned long int seqn;
 441         struct stream* stream = (struct stream*) arg;
 442         char stream_desc[100];
 443         int ret;
 444
 445         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 446         printf("%s\n", stream_desc);
 447
 448         if (stream->bandwidth_bps == 0)
 449                 goto out;
 450
 451         seqn = 0;
 452
 453         block_signals();
 454         set_rt_prio(90-stream->ac);
 455
 456         while (!exit_flag) {
 457
 458 /*              buff.msg.seqn = seqn++; */
 459 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 460                 buff.msg.stream = stream-streams;
 461
 462                 clock_gettime(CLOCK_MONOTONIC,&buff.msg.send_timestamp);
 463
 464                 ret = send_packet(stream, &buff);
 465                 if (ret < 0) {
 466                         goto out;
 467                 }
 468
 469                 pthread_mutex_lock(&stream->mutex);
 470                 stream->sent++;
 471                 if (ret > 0)
 472                         stream->really_sent++;
 473                 pthread_mutex_unlock(&stream->mutex);
 474
 475 #ifdef DEBUG
 476                 printf("%d", stream->ac);
 477                 fflush(stdout);
 478 #endif
 479
 480                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 481         }
 482 out:
 483         sem_post(&sem_thread_finished);
 484         return NULL;
 485 }
 486
 487 static inline void
 488 calc_stream_params(struct stream *stream)
 489 {
 490         int packet_size;
 491         unsigned period_usec;
 492         int bandwidth;
 493         struct hostent* ph;
 494
 495         bandwidth = stream->bandwidth_bps;
 496
 497         if (stream->packet_size) {
 498                 packet_size = stream->packet_size;
 499                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 500                 if (period_usec == 0) period_usec = 1;
 501         } else if (stream->period_usec) {
 502                 period_usec = stream->period_usec;
 503                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 504         } else {
 505                 char buf[200];
 506                 stream_to_text(buf, sizeof(buf), stream, 0);
 507                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 508                 exit(1);
 509         }
 510
 511         if (packet_size < sizeof(struct msg_t)) {
 512                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 513                 exit(1);
 514         }
 515
 516         stream->packet_size = packet_size;
 517         stream->period_usec = period_usec;
 518         stream->jitter = opt_jitter;
 519
 520         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 521
 522         stream->rem_addr.sin_family = AF_INET;
 523         ph = gethostbyname(server_addr);
 524         if (ph)
 525                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 526         else {
 527                 perror("Unknown server");
 528                 exit(1);
 529         }
 530         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 531
 532 }
 533
 534 /**
 535  * Parse -b parameter.
 536  *
 537  * @param params String to parse
 538  *
 539  * @return NULL in case of success, pointer to a problematic character
 540  *         on error.
 541  */
 542 char* parse_bandwidths(char *params)
 543 {
 544         struct stream *sp = &streams[nr_streams];
 545
 546         while (*params && nr_streams < MAX_STREAMS) {
 547                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 548                 int i;
 549                 char *next_char;
 550
 551                 if (strlen(params) < 2)
 552                         return params;
 553                 for (i=0; i<AC_NUM; i++) {
 554                         if (strncmp(params, ac_ids[i], 2) == 0) {
 555                                 sp->ac = i;
 556                                 params+=strlen(ac_ids[i]);
 557                                 break;
 558                         }
 559                 }
 560                 if (i==AC_NUM)
 561                         return params;
 562
 563                 long bw;
 564                 if (*params == ':') {
 565                         params++;
 566
 567                         bw = strtol(params, &next_char, 10);
 568                         if (next_char == params)
 569                                 return params;
 570                         params = next_char;
 571                 } else
 572                         bw = opt_def_bandwidth;
 573
 574                 sp->bandwidth_bps = bw*Kbit;
 575
 576                 long period = 0;
 577                 long packet_size = 0;
 578                 if (*params == '@') {
 579                         params++;
 580                         period = strtol(params, &next_char, 10);
 581                         if (period == 0)
 582                                 return params;
 583                         params = next_char;
 584                 }
 585                 else {
 586                         if (*params == '/') {
 587                                 params++;
 588                                 packet_size = strtol(params, &next_char, 10);
 589                                 if (packet_size == 0)
 590                                         return params;
 591                                 params = next_char;
 592                         } else {
 593                                 packet_size = opt_packet_size;
 594                                 period = opt_def_period_msec;
 595                         }
 596                 }
 597                 sp->period_usec = period*MSEC_TO_USEC;
 598                 sp->packet_size = packet_size;
 599
 600
 601
 602                 if (*params != '\0' && *params != ',')
 603                         return params;
 604                 nr_streams++;
 605                 sp++;
 606                 if (*params == ',')
 607                         params++;
 608         }
 609         return NULL;
 610 }
 611
 612 int main(int argc, char *argv[])
 613 {
 614         int ac, i, rc, seconds;
 615         pthread_attr_t attr;
 616         pthread_t thread;
 617         char opt;
 618
 619
 620         while ((opt = getopt(argc, argv, "B:b:c:g:j:o:qs:T:")) != -1) {
 621                 switch (opt) {
 622                         case 'B':
 623                                 opt_def_bandwidth = atoi(optarg);
 624                                 break;
 625                         case 'b': {
 626                                 char *error;
 627                                 error = parse_bandwidths(optarg);
 628                                 if (error != NULL) {
 629                                         if (*error == '\0')
 630                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 631                                         else
 632                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 633                                         exit(1);
 634                                 }
 635                                 break;
 636                         }
 637                         case 'c':
 638                                 opt_count_sec = atoi(optarg);
 639                                 break;
 640                         case 'g':
 641                                 opt_granularity_usec = atoi(optarg);
 642                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 643                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 644                                         exit(1);
 645                                 }
 646                                 break;
 647                         case 'j':
 648                                 opt_jitter = atoi(optarg);
 649                                 break;
 650                         case 'o':
 651                                 opt_output = optarg;
 652                                 break;
 653                         case 'q':
 654                                 opt_wait_for_queue_is_full = true;
 655                                 break;
 656                         case 's':
 657                                 opt_packet_size = atoi(optarg);
 658                                 break;
 659                         case 'T':
 660                                 opt_def_period_msec = atoi(optarg);
 661                                 break;
 662                         default:
 663                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 664                                 fprintf(stderr, "Options:\n");
 665                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 666                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 667                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 668                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 669                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 670                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 671                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 672                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 673                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 674                                 exit(1);
 675                 }
 676         }
 677         if (opt_packet_size && opt_def_period_msec) {
 678                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 679                 exit(1);
 680         }
 681
 682         if (optind < argc) {
 683                 server_addr = argv[optind];
 684         } else {
 685                 fprintf(stderr, "Expected server address argument\n");
 686                 exit(1);
 687         }
 688
 689         if (nr_streams == 0)
 690                 parse_bandwidths("BE");
 691
 692         pthread_attr_init(&attr);
 693
 694         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 695
 696         if ((logfd = fopen(logfname,"w+")) == NULL) {
 697                 fprintf(stderr,"Can not open %s\n", logfname);
 698                 exit(1);
 699         }
 700         if (signal(SIGTERM, stopper) == SIG_ERR) {
 701                 perror("Error in signal registration");
 702                 exit(1);
 703         }
 704
 705         if (signal(SIGINT, stopper) == SIG_ERR) {
 706                 perror("Signal handler registration error");
 707                 exit(1);
 708         }
 709
 710         struct sigaction sa;
 711         sa.sa_handler = empty_handler;
 712         sa.sa_flags = 0;        /* don't restart syscalls */
 713
 714         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 715                 perror("sigaction error");
 716                 exit(1);
 717         }
 718
 719         sem_init(&sem_thread_finished, 0, 0);
 720
 721         reset_statistics();
 722
 723         /* create four receivers each per AC */
 724         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 725                 ac_sockfd[ac] = create_ac_socket(ac);
 726                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 727                 if (rc) {
 728                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 729                         return 1;
 730                 }
 731         }
 732
 733         /* create sendpoints */
 734         for (i = 0; i < nr_streams; i++) {
 735                 struct stream *s = &streams[i];
 736                 pthread_mutex_init(&s->mutex, NULL);
 737                 calc_stream_params(s);
 738                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 739                 if (rc) {
 740                         fprintf(stderr, "Error while creating sender %d\n",rc);
 741                         return 1;
 742                 }
 743         }
 744
 745         seconds = 0;
 746         while (!exit_flag) {
 747                 sleep(1);
 748                 seconds++;
 749                 fprintf(stderr, "\r%3ds", seconds);
 750                 for (ac = 0; ac < AC_NUM; ac++) {
 751                         int delta = receivers[ac].received - receivers[ac].last_received;
 752                         receivers[ac].last_received = receivers[ac].received;
 753                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 754                 }
 755                 fflush(stderr);
 756                 if (seconds == opt_count_sec)
 757                         stopper();
 758         }
 759
 760         fprintf(stderr, "\nWaiting for threads to finish\n");
 761         /* Wait for all threads to finish */
 762         for (i=0; i < nr_streams + AC_NUM; i++) {
 763                 sem_wait(&sem_thread_finished);
 764         }
 765         struct timespec end_timestamp, measure_length;
 766         clock_gettime(CLOCK_MONOTONIC,&end_timestamp);
 767         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 768
 769         save_results(argc, argv, timespec2usec(&measure_length));
 770
 771         return 0;
 772 }