src/nse/nse-profiler.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 2011 Christian Grothoff (and other contributing authors)
   4
   5      GNUnet is free software; you can redistribute it and/or modify
   6      it under the terms of the GNU General Public License as published
   7      by the Free Software Foundation; either version 3, or (at your
   8      option) any later version.
   9
  10      GNUnet is distributed in the hope that it will be useful, but
  11      WITHOUT ANY WARRANTY; without even the implied warranty of
  12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13      General Public License for more details.
  14
  15      You should have received a copy of the GNU General Public License
  16      along with GNUnet; see the file COPYING.  If not, write to the
  17      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18      Boston, MA 02111-1307, USA.
  19 */
  20 /**
  21  * @file nse/nse-profiler.c
  22  *
  23  * @brief Profiling driver for the network size estimation service.
  24  *        Generally, the profiler starts a given number of peers,
  25  *        then churns some off, waits a certain amount of time, then
  26  *        churns again, and repeats.
  27  */
  28 #include "platform.h"
  29 #include "gnunet_testing_lib.h"
  30 #include "gnunet_nse_service.h"
  31
  32 #define VERBOSE GNUNET_NO
  33
  34 struct NSEPeer
  35 {
  36   struct NSEPeer *prev;
  37
  38   struct NSEPeer *next;
  39
  40   struct GNUNET_TESTING_Daemon *daemon;
  41
  42   struct GNUNET_NSE_Handle *nse_handle;
  43 };
  44
  45 struct StatsContext
  46 {
  47   GNUNET_SCHEDULER_Task task;
  48   GNUNET_SCHEDULER_TaskIdentifier *task_id;
  49   void *task_cls;
  50   unsigned long long total_nse_bytes;
  51 };
  52
  53 static struct NSEPeer *peer_head;
  54
  55 static struct NSEPeer *peer_tail;
  56
  57 /**
  58  * How long until we give up on connecting the peers?
  59  */
  60 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1500)
  61
  62 static int ok;
  63
  64 /**
  65  * Be verbose
  66  */
  67 static int verbose;
  68
  69 /**
  70  * Total number of peers in the test.
  71  */
  72 static unsigned long long num_peers;
  73
  74 /**
  75  * Global configuration file
  76  */
  77 static struct GNUNET_CONFIGURATION_Handle *testing_cfg;
  78
  79 /**
  80  * Total number of currently running peers.
  81  */
  82 static unsigned long long peers_running;
  83
  84 /**
  85  * Current round we are in.
  86  */
  87 static unsigned long long current_round;
  88
  89 /**
  90  * Peers desired in the next round.
  91  */
  92 static unsigned long long peers_next_round;
  93
  94 /**
  95  * Maximum number of connections to NSE services.
  96  */
  97 static unsigned long long connection_limit;
  98
  99 /**
 100  * Total number of connections in the whole network.
 101  */
 102 static unsigned int total_connections;
 103
 104 /**
 105  * The currently running peer group.
 106  */
 107 static struct GNUNET_TESTING_PeerGroup *pg;
 108
 109 /**
 110  * File to report results to.
 111  */
 112 static struct GNUNET_DISK_FileHandle *output_file;
 113
 114 /**
 115  * File to log connection info, statistics to.
 116  */
 117 static struct GNUNET_DISK_FileHandle *data_file;
 118
 119 /**
 120  * How many data points to capture before triggering next round?
 121  */
 122 static struct GNUNET_TIME_Relative wait_time;
 123
 124 /**
 125  * Task called to disconnect peers.
 126  */
 127 static GNUNET_SCHEDULER_TaskIdentifier disconnect_task;
 128
 129 /**
 130  * Task called to shutdown test.
 131  */
 132 static GNUNET_SCHEDULER_TaskIdentifier shutdown_handle;
 133
 134 /**
 135  * Task used to churn the network.
 136  */
 137 static GNUNET_SCHEDULER_TaskIdentifier churn_task;
 138
 139 static char *topology_file;
 140
 141 static char *data_filename;
 142
 143 static uint64_t clock_skew;
 144
 145 /**
 146  * Check whether peers successfully shut down.
 147  */
 148 static void
 149 shutdown_callback (void *cls, const char *emsg)
 150 {
 151   if (emsg != NULL)
 152     {
 153 #if VERBOSE
 154       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Shutdown of peers failed!\n");
 155 #endif
 156       if (ok == 0)
 157         ok = 666;
 158     }
 159   else
 160     {
 161 #if VERBOSE
 162       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 163                   "All peers successfully shut down!\n");
 164 #endif
 165       ok = 0;
 166     }
 167 }
 168
 169 static void
 170 shutdown_task (void *cls,
 171                const struct GNUNET_SCHEDULER_TaskContext *tc)
 172 {
 173   struct NSEPeer *pos;
 174 #if VERBOSE
 175   fprintf(stderr, "Ending test.\n");
 176 #endif
 177
 178   if (disconnect_task != GNUNET_SCHEDULER_NO_TASK)
 179     {
 180       GNUNET_SCHEDULER_cancel(disconnect_task);
 181       disconnect_task = GNUNET_SCHEDULER_NO_TASK;
 182     }
 183   while (NULL != (pos = peer_head))
 184     {
 185       if (pos->nse_handle != NULL)
 186         GNUNET_NSE_disconnect(pos->nse_handle);
 187       GNUNET_CONTAINER_DLL_remove(peer_head, peer_tail, pos);
 188       GNUNET_free(pos);
 189     }
 190
 191   if (data_file != NULL)
 192     GNUNET_DISK_file_close(data_file);
 193   GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
 194 }
 195
 196 /**
 197  * Callback to call when network size estimate is updated.
 198  *
 199  * @param cls closure
 200  * @param estimate the value of the current network size estimate
 201  * @param std_dev standard deviation (rounded down to nearest integer)
 202  *                of the size estimation values seen
 203  *
 204  */
 205 static void
 206 handle_estimate (void *cls, double estimate, double std_dev)
 207 {
 208   struct NSEPeer *peer = cls;
 209   char *output_buffer;
 210   size_t size;
 211
 212   if (output_file != NULL)
 213     {
 214       size = GNUNET_asprintf(&output_buffer,
 215                              "%s %u %f %f %f\n",
 216                              GNUNET_i2s(&peer->daemon->id),
 217                              peers_running,
 218                              pow(2, estimate),
 219                              estimate,
 220                              std_dev);
 221       if (size != GNUNET_DISK_file_write(output_file, output_buffer, size))
 222         GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 223                    "Unable to write to file!\n");
 224       GNUNET_free (output_buffer);
 225     }
 226   else
 227     fprintf(stderr,
 228             "Received network size estimate from peer %s. Size: %f std.dev. %f\n",
 229             GNUNET_i2s(&peer->daemon->id),
 230             estimate,
 231             std_dev);
 232
 233 }
 234
 235 static void
 236 connect_nse_service (void *cls,
 237                      const struct GNUNET_SCHEDULER_TaskContext *tc)
 238 {
 239   struct NSEPeer *current_peer;
 240   unsigned int i;
 241
 242 #if VERBOSE
 243   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 244               "Connecting to nse service of peers\n");
 245 #endif
 246   for (i = 0; i < num_peers; i++)
 247     {
 248       if ((connection_limit > 0) && (i % (num_peers / connection_limit) != 0))
 249         continue;
 250 #if VERBOSE
 251       GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "nse-profiler: connecting to nse service of peer %d\n", i);
 252 #endif
 253       current_peer = GNUNET_malloc(sizeof(struct NSEPeer));
 254       current_peer->daemon = GNUNET_TESTING_daemon_get(pg, i);
 255       if (GNUNET_YES == GNUNET_TESTING_daemon_running(GNUNET_TESTING_daemon_get(pg, i)))
 256         {
 257           current_peer->nse_handle = GNUNET_NSE_connect (current_peer->daemon->cfg,
 258                                                          &handle_estimate,
 259                                                          current_peer);
 260           GNUNET_assert(current_peer->nse_handle != NULL);
 261         }
 262       GNUNET_CONTAINER_DLL_insert (peer_head, peer_tail, current_peer);
 263     }
 264 }
 265
 266
 267 static void
 268 churn_peers (void *cls,
 269              const struct GNUNET_SCHEDULER_TaskContext *tc);
 270
 271
 272 /**
 273  * Continuation called by the "get_all" and "get" functions.
 274  *
 275  * @param cls struct StatsContext
 276  * @param success GNUNET_OK if statistics were
 277  *        successfully obtained, GNUNET_SYSERR if not.
 278  */
 279 static void
 280 stats_finished_callback (void *cls, int success)
 281 {
 282   struct StatsContext *stats_context = (struct StatsContext *)cls;
 283   char *buf;
 284   int buf_len;
 285
 286   if ((GNUNET_OK == success) && (data_file != NULL)) /* Stats lookup successful, write out data */
 287     {
 288       buf = NULL;
 289       buf_len = GNUNET_asprintf(&buf,
 290                                 "TOTAL_NSE_BYTES: %u\n",
 291                                 stats_context->total_nse_bytes);
 292       if (buf_len > 0)
 293         {
 294           GNUNET_DISK_file_write(data_file, buf, buf_len);
 295         }
 296       GNUNET_free_non_null(buf);
 297     }
 298
 299   if (stats_context->task != NULL)
 300     *stats_context->task_id = GNUNET_SCHEDULER_add_now(stats_context->task,
 301                                                        stats_context->task_cls);
 302   GNUNET_free(stats_context);
 303 }
 304
 305
 306 /**
 307  * Callback function to process statistic values.
 308  *
 309  * @param cls struct StatsContext
 310  * @param peer the peer the statistics belong to
 311  * @param subsystem name of subsystem that created the statistic
 312  * @param name the name of the datum
 313  * @param value the current value
 314  * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
 315  * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
 316  */
 317 static int
 318 statistics_iterator (void *cls,
 319                      const struct GNUNET_PeerIdentity *peer,
 320                      const char *subsystem,
 321                      const char *name,
 322                      uint64_t value,
 323                      int is_persistent)
 324 {
 325   struct StatsContext *stats_context = cls;
 326
 327   if ((0 == strstr(subsystem, "nse")) && (0 == strstr(name, "# flood messages received")))
 328     {
 329       stats_context->total_nse_bytes += value;
 330     }
 331
 332   return GNUNET_OK;
 333 }
 334
 335
 336 /**
 337  * @param cls struct StatsContext
 338  * @param tc task context
 339  */
 340 static void
 341 get_statistics (void *cls,
 342                 const struct GNUNET_SCHEDULER_TaskContext *tc)
 343 {
 344   struct StatsContext *stats_context = cls;
 345
 346   GNUNET_TESTING_get_statistics(pg,
 347                                 &stats_finished_callback,
 348                                 &statistics_iterator,
 349                                 stats_context);
 350 }
 351
 352
 353 static void
 354 disconnect_nse_peers (void *cls,
 355                       const struct GNUNET_SCHEDULER_TaskContext *tc)
 356 {
 357   struct NSEPeer *pos;
 358   char *buf;
 359   struct StatsContext *stats_context;
 360   disconnect_task = GNUNET_SCHEDULER_NO_TASK;
 361   pos = peer_head;
 362
 363   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 364               "disconnecting nse service of peers\n");
 365   while (NULL != (pos = peer_head))
 366     {
 367       if (pos->nse_handle != NULL)
 368         {
 369           GNUNET_NSE_disconnect(pos->nse_handle);
 370           pos->nse_handle = NULL;
 371         }
 372       GNUNET_CONTAINER_DLL_remove(peer_head, peer_tail, pos);
 373       GNUNET_free(pos);
 374     }
 375
 376   GNUNET_asprintf(&buf,
 377                   "round%llu",
 378                   current_round);
 379   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (testing_cfg,
 380                                                           "nse-profiler",
 381                                                           buf,
 382                                                           &peers_next_round))
 383     {
 384       current_round++;
 385       GNUNET_assert(churn_task == GNUNET_SCHEDULER_NO_TASK);
 386       churn_task = GNUNET_SCHEDULER_add_now(&churn_peers, NULL);
 387     }
 388   else /* No more rounds, let's shut it down! */
 389     {
 390       stats_context = GNUNET_malloc(sizeof(struct StatsContext));
 391       GNUNET_SCHEDULER_cancel(shutdown_handle);
 392       shutdown_handle = GNUNET_SCHEDULER_NO_TASK;
 393       stats_context->task = &shutdown_task;
 394       stats_context->task_cls = NULL;
 395       stats_context->task_id = &shutdown_handle;
 396       GNUNET_SCHEDULER_add_now(&get_statistics, stats_context);
 397       //shutdown_handle = GNUNET_SCHEDULER_add_now(&shutdown_task, NULL);
 398     }
 399   GNUNET_free(buf);
 400 }
 401
 402
 403 /**
 404  * Prototype of a function that will be called when a
 405  * particular operation was completed the testing library.
 406  *
 407  * @param cls unused
 408  * @param emsg NULL on success
 409  */
 410 static void
 411 topology_output_callback (void *cls, const char *emsg)
 412 {
 413   struct StatsContext *stats_context;
 414   stats_context = GNUNET_malloc(sizeof(struct StatsContext));
 415
 416   disconnect_task = GNUNET_SCHEDULER_add_delayed(wait_time, &disconnect_nse_peers, NULL);
 417   GNUNET_SCHEDULER_add_now(&connect_nse_service, NULL);
 418 }
 419
 420
 421 /**
 422  * Prototype of a function that will be called when a
 423  * particular operation was completed the testing library.
 424  *
 425  * @param cls closure
 426  * @param emsg NULL on success
 427  */
 428 static void
 429 churn_callback (void *cls, const char *emsg)
 430 {
 431   char *temp_output_file;
 432
 433   if (emsg == NULL) /* Everything is okay! */
 434     {
 435       peers_running = peers_next_round;
 436       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 437                   "Round %lu, churn finished successfully.\n",
 438                   current_round);
 439       GNUNET_assert(disconnect_task == GNUNET_SCHEDULER_NO_TASK);
 440       GNUNET_asprintf(&temp_output_file,
 441                       "%s_%lu.dot",
 442                       topology_file,
 443                       current_round);
 444       GNUNET_TESTING_peergroup_topology_to_file(pg,
 445                                                 temp_output_file,
 446                                                 &topology_output_callback,
 447                                                 NULL);
 448       GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 449                  "Writing topology to file %s\n",
 450                  temp_output_file);
 451       GNUNET_free(temp_output_file);
 452     }
 453   else
 454     {
 455       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 456                   "Round %lu, churn FAILED!!\n",
 457                   current_round);
 458       GNUNET_SCHEDULER_cancel(shutdown_handle);
 459       GNUNET_SCHEDULER_add_now(&shutdown_task, NULL);
 460     }
 461 }
 462
 463
 464 static void
 465 churn_peers (void *cls,
 466              const struct GNUNET_SCHEDULER_TaskContext *tc)
 467 {
 468   /* peers_running = GNUNET_TESTING_daemons_running(pg); */
 469   churn_task = GNUNET_SCHEDULER_NO_TASK;
 470   if (peers_next_round == peers_running)
 471     {
 472       /* Nothing to do... */
 473       GNUNET_SCHEDULER_add_now(&connect_nse_service, NULL);
 474       GNUNET_assert(disconnect_task == GNUNET_SCHEDULER_NO_TASK);
 475       disconnect_task = GNUNET_SCHEDULER_add_delayed(wait_time,
 476                                                      &disconnect_nse_peers, NULL);
 477       GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 478                  "Round %lu, doing nothing!\n",
 479                  current_round);
 480     }
 481   else
 482     {
 483       if (peers_next_round > num_peers)
 484         {
 485           GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 486                      "Asked to turn on more peers than we have!!\n");
 487           GNUNET_SCHEDULER_cancel(shutdown_handle);
 488           GNUNET_SCHEDULER_add_now(&shutdown_task, NULL);
 489         }
 490       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 491                   "Round %lu, turning off %lu peers, turning on %lu peers!\n",
 492                   current_round,
 493                   (peers_running > peers_next_round) ? peers_running
 494                       - peers_next_round : 0,
 495                   (peers_next_round > peers_running) ? peers_next_round
 496                       - peers_running : 0);
 497       GNUNET_TESTING_daemons_churn (pg, "nse",
 498                                     (peers_running > peers_next_round) ? peers_running
 499                                         - peers_next_round
 500                                         : 0,
 501                                     (peers_next_round > peers_running) ? peers_next_round
 502                                         - peers_running
 503                                         : 0, wait_time, &churn_callback,
 504                                     NULL);
 505     }
 506 }
 507
 508
 509 static void
 510 my_cb (void *cls,
 511        const char *emsg)
 512 {
 513   char *buf;
 514   int buf_len;
 515   if (emsg != NULL)
 516     {
 517       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 518                   "Peergroup callback called with error, aborting test!\n");
 519       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Error from testing: `%s'\n");
 520       ok = 1;
 521       GNUNET_TESTING_daemons_stop (pg, TIMEOUT, &shutdown_callback, NULL);
 522       return;
 523     }
 524 #if VERBOSE
 525   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 526               "Peer Group started successfully, connecting to NSE service for each peer!\n");
 527 #endif
 528   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 529               "Have %u connections\n", total_connections);
 530   if (data_file != NULL)
 531     {
 532       buf = NULL;
 533       buf_len = GNUNET_asprintf(&buf,
 534                                 "CONNECTIONS_0: %u\n",
 535                                 total_connections);
 536       if (buf_len > 0)
 537         GNUNET_DISK_file_write(data_file, buf, buf_len);
 538       GNUNET_free (buf);
 539     }
 540   peers_running = GNUNET_TESTING_daemons_running(pg);
 541   GNUNET_SCHEDULER_add_now(&connect_nse_service, NULL);
 542   disconnect_task = GNUNET_SCHEDULER_add_delayed(wait_time, &disconnect_nse_peers, NULL);
 543 }
 544
 545
 546 /**
 547  * Function that will be called whenever two daemons are connected by
 548  * the testing library.
 549  *
 550  * @param cls closure
 551  * @param first peer id for first daemon
 552  * @param second peer id for the second daemon
 553  * @param distance distance between the connected peers
 554  * @param first_cfg config for the first daemon
 555  * @param second_cfg config for the second daemon
 556  * @param first_daemon handle for the first daemon
 557  * @param second_daemon handle for the second daemon
 558  * @param emsg error message (NULL on success)
 559  */
 560 static void
 561 connect_cb (void *cls,
 562             const struct GNUNET_PeerIdentity *first,
 563             const struct GNUNET_PeerIdentity *second,
 564             uint32_t distance,
 565             const struct GNUNET_CONFIGURATION_Handle *first_cfg,
 566             const struct GNUNET_CONFIGURATION_Handle *second_cfg,
 567             struct GNUNET_TESTING_Daemon *first_daemon,
 568             struct GNUNET_TESTING_Daemon *second_daemon,
 569             const char *emsg)
 570 {
 571   if (emsg == NULL)
 572     total_connections++;
 573 }
 574
 575
 576 static void
 577 run (void *cls,
 578      char *const *args,
 579      const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg)
 580 {
 581   char *temp_str;
 582   unsigned long long temp_wait;
 583   struct GNUNET_TESTING_Host *hosts;
 584
 585   ok = 1;
 586   testing_cfg = GNUNET_CONFIGURATION_create();
 587   GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_load(testing_cfg, cfgfile));
 588 #if VERBOSE
 589   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting daemons.\n");
 590   GNUNET_CONFIGURATION_set_value_string (testing_cfg, "testing",
 591                                            "use_progressbars",
 592                                            "YES");
 593 #endif
 594   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (testing_cfg,
 595                                                           "testing",
 596                                                           "num_peers", &num_peers))
 597     {
 598       GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Option TESTING:NUM_PEERS is required!\n");
 599       return;
 600     }
 601
 602   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (testing_cfg,
 603                                                           "nse-profiler",
 604                                                           "wait_time",
 605                                                           &temp_wait))
 606     {
 607       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 608                  "Option nse-profiler:wait_time is required!\n");
 609       return;
 610     }
 611
 612   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (testing_cfg,
 613                                                           "nse-profiler", "connection_limit",
 614                                                           &connection_limit))
 615     {
 616       connection_limit = 0;
 617     }
 618
 619   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (testing_cfg,
 620                                                           "nse-profiler", "topology_output_file",
 621                                                           &topology_file))
 622     {
 623       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 624                  "Option nse-profiler:topology_output_file is required!\n");
 625       return;
 626     }
 627
 628   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (testing_cfg,
 629                                                           "nse-profiler", "data_output_file",
 630                                                           &data_filename))
 631     {
 632       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 633                  "Option nse-profiler:data_output_file is required!\n");
 634       return;
 635     }
 636
 637   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno (testing_cfg,
 638                                                           "nse-profiler",
 639                                                           "skew_clock"))
 640     {
 641       GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 642                  "Setting our clock as skewed...\n");
 643       clock_skew = GNUNET_CRYPTO_random_u64(GNUNET_CRYPTO_QUALITY_WEAK,
 644                                             GNUNET_TIME_UNIT_MINUTES.rel_value);
 645     }
 646
 647
 648   data_file = GNUNET_DISK_file_open (data_filename,
 649                                      GNUNET_DISK_OPEN_READWRITE
 650                                      | GNUNET_DISK_OPEN_CREATE,
 651                                      GNUNET_DISK_PERM_USER_READ |
 652                                      GNUNET_DISK_PERM_USER_WRITE);
 653   if (data_file == NULL)
 654     GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 655                "Failed to open %s for output!\n",
 656                data_filename);
 657   GNUNET_free(data_filename);
 658
 659   wait_time = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, temp_wait);
 660
 661   if (GNUNET_YES == GNUNET_CONFIGURATION_get_value_string(cfg,
 662                                                           "nse-profiler",
 663                                                           "output_file",
 664                                                           &temp_str))
 665     {
 666       output_file = GNUNET_DISK_file_open (temp_str, GNUNET_DISK_OPEN_READWRITE
 667                                                       | GNUNET_DISK_OPEN_CREATE,
 668                                                       GNUNET_DISK_PERM_USER_READ |
 669                                                       GNUNET_DISK_PERM_USER_WRITE);
 670       if (output_file == NULL)
 671         GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 672                    "Failed to open %s for output!\n",
 673                    temp_str);
 674     }
 675   GNUNET_free_non_null(temp_str);
 676
 677   hosts = GNUNET_TESTING_hosts_load (testing_cfg);
 678
 679   pg = GNUNET_TESTING_peergroup_start(testing_cfg,
 680                                       num_peers,
 681                                       TIMEOUT,
 682                                       &connect_cb,
 683                                       &my_cb, NULL,
 684                                       hosts);
 685   GNUNET_assert (pg != NULL);
 686   shutdown_handle = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_get_forever(),
 687                                                   &shutdown_task,
 688                                                   NULL);
 689 }
 690
 691
 692
 693 /**
 694  * nse-profiler command line options
 695  */
 696 static struct GNUNET_GETOPT_CommandLineOption options[] = {
 697   {'V', "verbose", NULL,
 698    gettext_noop ("be verbose (print progress information)"),
 699    0, &GNUNET_GETOPT_set_one, &verbose},
 700   GNUNET_GETOPT_OPTION_END
 701 };
 702
 703
 704 int
 705 main (int argc, char *argv[])
 706 {
 707   int ret;
 708
 709   GNUNET_log_setup ("nse-profiler",
 710 #if VERBOSE
 711                     "DEBUG",
 712 #else
 713                     "WARNING",
 714 #endif
 715                     NULL);
 716   ret = 1;
 717   GNUNET_PROGRAM_run (argc,
 718                       argv, "nse-profiler", gettext_noop
 719                       ("Run a test of the NSE service."),
 720                       options, &run, &ok);
 721   GNUNET_DISK_directory_remove ("/tmp/nse-profiler");
 722   return ret;
 723 }
 724
 725 /* end of nse-profiler.c */