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 = 10;
  31 int opt_granularity_usec = MIN_GRANULARITY;
  32
  33 int ac_sockfd[AC_NUM];
  34
  35 struct receiver {
  36         pthread_t thread;
  37         unsigned received, last_received;
  38 } receivers[AC_NUM];
  39
  40 FILE* logfd;
  41 char* server_addr;
  42 char logfname[100];
  43
  44 /* maximal traffic delay in ms - 10 s*/
  45 #define MAX_DELAY_US 10000000
  46
  47 unsigned delay_stats[AC_NUM][MAX_DELAY_US/MIN_GRANULARITY];
  48
  49 /*struct ac_stats[AC_NUM] {
  50    unsigned long int min_trans_time;
  51    unsigned long int sum_trans_time;
  52    struct timespec   recv_timestamp;
  53    struct timespec   send_timestamp;
  54 };*/
  55
  56 struct stream {
  57         /* Input parameters */
  58         enum ac ac;             /*  */
  59         int bandwidth_bps;      /* bits per second */
  60         int jitter;             /* percent */
  61         /* Mulualy exclusive input parameters */
  62         int packet_size;
  63         long period_usec;       /* all time units are in microseconds */
  64
  65         /* Statistics */
  66         unsigned long long sent, received;
  67 };
  68
  69 /*
  70 struct send_endpoint sepoint[] = {
  71         { .ac = AC_VO, .period_usec=200*MSEC_TO_USEC, .bandwidth_bps = 34*Kbit },
  72         { .ac = AC_VI, .period_usec=25*MSEC_TO_USEC, .bandwidth_bps =  480*Kbit },
  73         { .ac = AC_BE, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  74         { .ac = AC_BK, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  75 //      { .ac = AC_VI, .period_usec=17*MSEC_TO_USEC, .bandwidth_bps =  675*Kbit },
  76 };
  77 */
  78
  79 struct stream streams[MAX_STREAMS];
  80
  81 unsigned int nr_streams = 0;
  82
  83 sem_t sem_thread_finished;
  84
  85 bool exit_flag = false;
  86
  87 void stopper()
  88 {
  89         int i;
  90         exit_flag = true;
  91
  92         /* Interrupt all receivers */
  93         for (i=0; i < AC_NUM; i++) {
  94                 pthread_kill(receivers[i].thread, SIGUSR1);
  95         }
  96 }
  97
  98 void stream_to_text(char *stream_desc, size_t n, struct stream *stream, int seconds)
  99 {
 100         char buf[3][12];
 101         char real[100];
 102
 103         if (seconds) {
 104                 snprintf(real, sizeof(real), "; real: sent %lld (%lld/s), received %lld (%lld/s)",
 105                          stream->sent, stream->sent/seconds,
 106                          stream->received, stream->received/seconds);
 107         }
 108
 109         snprintf(stream_desc, n, "%d: %s %s (%d bytes per %s +-%s, %d packets/s)%s",
 110                  stream-streams, ac_to_text[stream->ac], bandwidth_to_text(buf[0], stream->bandwidth_bps),
 111                  stream->packet_size, usec_to_text(buf[1], stream->period_usec),
 112                  usec_to_text(buf[2], stream->jitter*stream->period_usec/100),
 113                  (int)(SEC_TO_USEC/stream->period_usec), real);
 114 }
 115
 116 void save_results(int argc, char *argv[], int seconds)
 117 {
 118         int ac, i, maxi;
 119         const int mini = 3000/opt_granularity_usec;
 120         bool allzeros;
 121         unsigned sum[AC_NUM];
 122         double val;
 123
 124         fprintf(stderr, "Writing data to %s... ", logfname);
 125         fflush(stderr);
 126
 127         fprintf(logfd, "# Invoked as: ");
 128         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 129         fprintf(logfd, "\n");
 130
 131         for (i = 0; i < nr_streams; i++) {
 132                 char stream_desc[120];
 133                 stream_to_text(stream_desc, sizeof(stream_desc), &streams[i], seconds);
 134                 fprintf(logfd, "# Stream %s\n", stream_desc);
 135         }
 136
 137         /* Find maximal delay */
 138         allzeros = true;
 139         for (maxi = MAX_DELAY_US/opt_granularity_usec - 1; maxi >= 0; maxi--) {
 140                 for (ac = 0; ac < AC_NUM; ac++) {
 141                         if (delay_stats[ac][maxi] != 0) allzeros = false;
 142                 }
 143                 if (!allzeros) break;
 144         }
 145         maxi++;
 146         if (maxi < mini) maxi = mini;
 147
 148         /* Calculate total number of received packets per AC */
 149         for (ac = 0; ac < AC_NUM; ac++) {
 150                 sum[ac] = 0;
 151                 for ( i = 0 ; i < maxi; i++)
 152                         sum[ac]+=delay_stats[ac][i];
 153 /*              if (sum[ac] == 0) */
 154 /*                      fprintf(stderr, "No response in AC %d\n", ac); */
 155         }
 156
 157 #if 0
 158         /* Write pdf */
 159         for ( i = 0 ; i < maxi; i++) {
 160                 fprintf(logfd,"\n%f", i*opt_granularity_usec/1000.0);
 161                 for (ac = 0; ac < AC_NUM; ac++) {
 162                         if (sum[ac])
 163                                 val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 164                         else val = -1; /* Don't display this ac */
 165                         fprintf(logfd," %lf", val);
 166                 }
 167         }
 168
 169         fprintf(logfd,"\n\n");
 170 #endif
 171
 172         /* Write PDF */
 173         for (ac = 0; ac < AC_NUM; ac++) {
 174                 unsigned long long integral = 0, last = -1;
 175
 176                 fprintf(logfd,"%f %f\n", 0.0, 0.0);
 177
 178                 if (sum[ac] != 0) {
 179                         i=0;
 180                         while (delay_stats[ac][i] == 0) i++;
 181
 182                         for (i++; i < maxi+1; i++) {
 183                                 if (last != integral) {
 184                                         val = (double)integral*100.0 / sum[ac];
 185                                         fprintf(logfd,"%f %f\n", i*opt_granularity_usec/1000.0, val);
 186                                         last = integral;
 187                                 }
 188                                 if (i>0)
 189                                         integral += delay_stats[ac][i-1];
 190                         }
 191                 }
 192                 fprintf(logfd,"\n\n");
 193         }
 194
 195         fprintf(stderr, "finished.\n");
 196         fclose(logfd);
 197
 198         exit(0);
 199 }
 200
 201 static inline
 202 void timespec_add (struct timespec *sum, const struct timespec *left,
 203               const struct timespec *right)
 204 {
 205         sum->tv_sec = left->tv_sec + right->tv_sec;
 206         sum->tv_nsec = left->tv_nsec + right->tv_nsec;
 207
 208         if (sum->tv_nsec >= 1000000000){
 209                 ++sum->tv_sec;
 210                 sum->tv_nsec -= 1000000000;
 211         }
 212 }
 213
 214 static inline
 215 void timespec_sub (struct timespec *diff, const struct timespec *left,
 216               const struct timespec *right)
 217 {
 218         diff->tv_sec = left->tv_sec - right->tv_sec;
 219         diff->tv_nsec = left->tv_nsec - right->tv_nsec;
 220
 221         if (diff->tv_nsec < 0){
 222                   --diff->tv_sec;
 223                   diff->tv_nsec += 1000000000;
 224         }
 225 }
 226
 227 int create_ac_socket(unsigned int ac)
 228 {
 229         int sockfd;
 230         unsigned int yes=1, tos;
 231
 232
 233         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 234         {
 235                 perror("Unable to open socket");
 236                 return -1;
 237         }
 238
 239         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 240                 perror("Unable to set socket");
 241                 return -1;
 242         }
 243
 244
 245         //tos = ((AC_NUM - ac) *2 - 1)*32;
 246         tos = ac_to_tos[ac];
 247         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 248                 perror("Unable to set TOS");
 249                 close(sockfd);
 250                 return -1;
 251         }
 252
 253         return sockfd;
 254 }
 255
 256 void empty_handler()
 257 {
 258 }
 259
 260 void* receiver(void* queue)
 261 {
 262         struct msg_t    msg;
 263         struct  sockaddr_in rem_addr;
 264         int     mlen;
 265         unsigned int ac, rem_addr_length;
 266         unsigned long int trans_time_usec;
 267         unsigned long int min_trans_time;
 268         struct timespec   send_timestamp,recv_timestamp, trans_time;
 269
 270         min_trans_time = ~0;
 271
 272         block_signals();
 273         set_rt_prio(99);
 274
 275         ac = (int)queue;
 276         rem_addr_length = sizeof(rem_addr);
 277         while (!exit_flag) {
 278                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,    \
 279                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 280                 if (mlen < 0) {
 281                         if (errno == EINTR) continue;
 282                         perror("Chyba pri prijimani pozadavku");
 283                         goto out;
 284                 }
 285                 clock_gettime(CLOCK_MONOTONIC,&recv_timestamp);
 286                 send_timestamp = msg.send_timestamp;
 287
 288                 timespec_sub(&trans_time,&recv_timestamp ,&send_timestamp);
 289                 trans_time_usec = (trans_time.tv_sec * SEC_TO_USEC + \
 290                                          trans_time.tv_nsec / USEC_TO_NSEC) /2;
 291
 292                 if (trans_time_usec < MAX_DELAY_US)
 293                         delay_stats[ac][trans_time_usec/opt_granularity_usec]++;
 294
 295                 receivers[ac].received++;
 296                 streams[msg.stream].received++;
 297
 298                 /*if (trans_time_nsec < min_trans_time)
 299                         min_trans_time = trans_time_nsec;*/
 300                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 301                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 302                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 303                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 304                          recv_timestamp.tv_nsec, trans_time_msec); */
 305         }
 306 out:
 307         sem_post(&sem_thread_finished);
 308         return NULL;
 309 }
 310
 311 void* sender(void* arg)
 312 {
 313         struct sockaddr_in rem_addr;
 314         union msg_buff buff;
 315         unsigned long int seqn;
 316         struct timespec time_to_wait, current_time, period, interval;
 317         struct hostent* ph;
 318         struct stream* stream = (struct stream*) arg;
 319         int packet_size;
 320         unsigned period_usec;
 321         char stream_desc[100];
 322
 323         if (stream->bandwidth_bps == 0)
 324                 goto out;
 325
 326         set_rt_prio(90-stream->ac);
 327
 328         if (opt_packet_size) {
 329                 packet_size = opt_packet_size;
 330                 period_usec = SEC_TO_USEC*packet_size*8/stream->bandwidth_bps;
 331         } else {
 332                 period_usec = stream->period_usec;
 333                 packet_size = (long long)stream->bandwidth_bps/8 * period_usec/SEC_TO_USEC;
 334         }
 335         stream->packet_size = packet_size;
 336         stream->period_usec = period_usec;
 337         stream->jitter = opt_jitter;
 338
 339
 340         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 341
 342         printf("%s\n", stream_desc);
 343
 344         if (packet_size < sizeof(struct msg_t)) {
 345                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 346                 exit(1);
 347         }
 348
 349
 350         memset(&rem_addr,0, sizeof(rem_addr));
 351
 352         rem_addr.sin_family = AF_INET;
 353         ph = gethostbyname(server_addr);
 354         if (ph)
 355                 rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 356         else {
 357                 perror("Unknown server");
 358                 exit(1);
 359         }
 360         rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 361         seqn = 0;
 362
 363         block_signals();
 364
 365         while (!exit_flag) {
 366
 367                 buff.msg.seqn = seqn;
 368                 buff.msg.tos = ac_to_tos[stream->ac];
 369                 buff.msg.stream = stream-streams;
 370
 371                 clock_gettime(CLOCK_MONOTONIC,&buff.msg.send_timestamp);
 372
 373                 while (sendto(ac_sockfd[stream->ac], &buff, packet_size, 0,\
 374                                 (struct sockaddr*)&rem_addr, sizeof(rem_addr)) < 0) {
 375                                 if (errno == EINTR) continue;
 376                                 perror("Error while sending");
 377                                 goto out;
 378                 }
 379
 380 #ifdef DEBUG
 381                 printf("%d", ac);
 382                 fflush(stdout);
 383 #endif
 384                 seqn++;
 385                 stream->sent++;
 386
 387                 /*           |~~~+~~~| jitter interval (width = 2*opt_jitter percentage from period)*/
 388                 /* |-------------|     nominal period*/
 389                 if (opt_jitter) {
 390                         period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-opt_jitter)/100
 391                                                  + rand() % (2*period_usec*opt_jitter/100));
 392                 } else {
 393                         period.tv_nsec = USEC_TO_NSEC*(period_usec);
 394                 }
 395                 period.tv_sec = 0;
 396
 397                 timespec_add(&time_to_wait,&buff.msg.send_timestamp,&period);
 398                 clock_gettime(CLOCK_MONOTONIC,&current_time);
 399                 timespec_sub(&interval,&time_to_wait,&current_time);
 400                 nanosleep(&interval,NULL);
 401         }
 402 out:
 403         sem_post(&sem_thread_finished);
 404         return NULL;
 405 }
 406
 407 char* parse_bandwidths(char *params)
 408 {
 409         struct stream *sp = &streams[nr_streams];
 410
 411         while (*params && nr_streams < MAX_STREAMS) {
 412                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 413                 int i;
 414                 char *next_char;
 415
 416                 if (strlen(params) < 2)
 417                         return params;
 418                 for (i=0; i<AC_NUM; i++) {
 419                         if (strncmp(params, ac_ids[i], 2) == 0) {
 420                                 sp->ac = i;
 421                                 params+=strlen(ac_ids[i]);
 422                                 break;
 423                         }
 424                 }
 425                 if (i==AC_NUM)
 426                         return params;
 427
 428                 long bw;
 429                 if (*params == ':') {
 430                         params++;
 431
 432                         bw = strtol(params, &next_char, 10);
 433                         if (next_char == params)
 434                                 return params;
 435                         params = next_char;
 436                 } else
 437                         bw = opt_def_bandwidth;
 438
 439                 sp->bandwidth_bps = bw*Kbit;
 440
 441                 long period;
 442                 if (*params == '@') {
 443                         params++;
 444                         period = strtol(params, &next_char, 10);
 445                         if (period == 0)
 446                                 return params;
 447                         params = next_char;
 448                 }
 449                 else
 450                         period = opt_def_period_msec;
 451                 sp->period_usec = period*MSEC_TO_USEC;
 452
 453                 if (*params != '\0' && *params != ',')
 454                         return params;
 455                 nr_streams++;
 456                 sp++;
 457                 if (*params == ',')
 458                         params++;
 459         }
 460         return NULL;
 461 }
 462
 463 int main(int argc, char *argv[])
 464 {
 465         int ac, i, rc, seconds;
 466         pthread_attr_t attr;
 467         pthread_t thread;
 468         char opt;
 469
 470
 471         while ((opt = getopt(argc, argv, "B:b:c:g:j:o:s:T:")) != -1) {
 472                 switch (opt) {
 473                         case 'B':
 474                                 opt_def_bandwidth = atoi(optarg);
 475                                 break;
 476                         case 'b': {
 477                                 char *error;
 478                                 error = parse_bandwidths(optarg);
 479                                 if (error != NULL) {
 480                                         if (*error == '\0')
 481                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 482                                         else
 483                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 484                                         exit(1);
 485                                 }
 486                                 break;
 487                         }
 488                         case 'c':
 489                                 opt_count_sec = atoi(optarg);
 490                                 break;
 491                         case 'g':
 492                                 opt_granularity_usec = atoi(optarg);
 493                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 494                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 495                                         exit(1);
 496                                 }
 497                                 break;
 498                         case 'j':
 499                                 opt_jitter = atoi(optarg);
 500                                 break;
 501                         case 'o':
 502                                 opt_output = optarg;
 503                                 break;
 504                         case 's':
 505                                 opt_packet_size = atoi(optarg);
 506                                 break;
 507                         case 'T':
 508                                 opt_def_period_msec = atoi(optarg);
 509                                 break;
 510                         default:
 511                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 512                                 fprintf(stderr, "Options:\n");
 513                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 514                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec>][,...]\n");
 515                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 516                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 517                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 518                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 519                                 fprintf(stderr, "    -s  size of data payload in packets [bytes]\n");
 520                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 521                                 exit(1);
 522                 }
 523         }
 524         if (optind < argc) {
 525                 server_addr = argv[optind];
 526         } else {
 527                 fprintf(stderr, "Expected server address argument\n");
 528                 exit(1);
 529         }
 530
 531
 532         if (nr_streams == 0)
 533                 parse_bandwidths("BE");
 534
 535         memset(delay_stats,0, sizeof(delay_stats));
 536         pthread_attr_init(&attr);
 537
 538         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 539
 540         if ((logfd = fopen(logfname,"w+")) == NULL) {
 541                 fprintf(stderr,"Can not open %s\n", logfname);
 542                 exit(1);
 543         }
 544         if (signal(SIGTERM, stopper) == SIG_ERR) {
 545                 perror("Error in signal registration");
 546                 exit(1);
 547         }
 548
 549         if (signal(SIGINT, stopper) == SIG_ERR) {
 550                 perror("Signal handler registration error");
 551                 exit(1);
 552         }
 553
 554         struct sigaction sa;
 555         sa.sa_handler = empty_handler;
 556         sa.sa_flags = 0;        /* don't restart syscalls */
 557
 558         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 559                 perror("sigaction error");
 560                 exit(1);
 561         }
 562
 563         sem_init(&sem_thread_finished, 0, 0);
 564
 565         /* create four receivers each per AC */
 566         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 567                 ac_sockfd[ac] = create_ac_socket(ac);
 568                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 569                 if (rc) {
 570                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 571                         return 1;
 572                 }
 573         }
 574
 575         /* create sendpoints */
 576         for (i = 0; i < nr_streams; i++) {
 577                 rc = pthread_create(&thread, &attr, sender, (void*) &streams[i]);
 578                 if (rc) {
 579                         fprintf(stderr, "Error while creating sender %d\n",rc);
 580                         return 1;
 581                 }
 582         }
 583
 584         seconds = 0;
 585         while (!exit_flag) {
 586                 sleep(1);
 587                 seconds++;
 588                 fprintf(stderr, "\r%3ds", seconds);
 589                 for (ac = 0; ac < AC_NUM; ac++) {
 590                         int delta = receivers[ac].received - receivers[ac].last_received;
 591                         receivers[ac].last_received = receivers[ac].received;
 592                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 593                 }
 594                 fflush(stderr);
 595                 if (seconds == opt_count_sec)
 596                         stopper();
 597         }
 598
 599         fprintf(stderr, "\nWaiting for threads to finish\n");
 600         /* Wait for all threads to finish */
 601         for (i=0; i < nr_streams + AC_NUM; i++) {
 602                 sem_wait(&sem_thread_finished);
 603         }
 604
 605         save_results(argc, argv, seconds);
 606
 607         return 0;
 608 }