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- /*
- This file is part of GNUnet.
- Copyright (C) 2011, 2012 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
-
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file nse/gnunet-nse-profiler.c
- *
- * @brief Profiling driver for the network size estimation service.
- * Generally, the profiler starts a given number of peers,
- * then churns some off, waits a certain amount of time, then
- * churns again, and repeats.
- * @author Christian Grothoff
- * @author Nathan Evans
- * @author Sree Harsha Totakura
- */
- #include "platform.h"
- #include "gnunet_testbed_service.h"
- #include "gnunet_nse_service.h"
- /**
- * Generic loggins shorthand
- */
- #define LOG(kind,...) \
- GNUNET_log (kind, __VA_ARGS__)
- /**
- * Debug logging shorthand
- */
- #define LOG_DEBUG(...) \
- LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
- /**
- * Information we track for a peer in the testbed.
- */
- struct NSEPeer
- {
- /**
- * Prev reference in DLL.
- */
- struct NSEPeer *prev;
- /**
- * Next reference in DLL.
- */
- struct NSEPeer *next;
- /**
- * Handle with testbed.
- */
- struct GNUNET_TESTBED_Peer *daemon;
- /**
- * Testbed operation to connect to NSE service.
- */
- struct GNUNET_TESTBED_Operation *nse_op;
- /**
- * Testbed operation to connect to statistics service
- */
- struct GNUNET_TESTBED_Operation *stat_op;
- /**
- * Handle to the statistics service
- */
- struct GNUNET_STATISTICS_Handle *sh;
- };
- /**
- * Operation map entry
- */
- struct OpListEntry
- {
- /**
- * DLL next ptr
- */
- struct OpListEntry *next;
- /**
- * DLL prev ptr
- */
- struct OpListEntry *prev;
- /**
- * The testbed operation
- */
- struct GNUNET_TESTBED_Operation *op;
- /**
- * Depending on whether we start or stop NSE service at the peer set this to 1
- * or -1
- */
- int delta;
- };
- /**
- * Head of DLL of peers we monitor closely.
- */
- static struct NSEPeer *peer_head;
- /**
- * Tail of DLL of peers we monitor closely.
- */
- static struct NSEPeer *peer_tail;
- /**
- * Return value from 'main' (0 == success)
- */
- static int ok;
- /**
- * Be verbose (configuration option)
- */
- static unsigned int verbose;
- /**
- * Name of the file with the hosts to run the test over (configuration option)
- */
- static char *hosts_file;
- /**
- * Maximum number of peers in the test.
- */
- static unsigned int num_peers;
- /**
- * Total number of rounds to execute.
- */
- static unsigned int num_rounds;
- /**
- * Current round we are in.
- */
- static unsigned int current_round;
- /**
- * Array of size 'num_rounds' with the requested number of peers in the given round.
- */
- static unsigned int *num_peers_in_round;
- /**
- * How many peers are running right now?
- */
- static unsigned int peers_running;
- /**
- * Specification for the numbers of peers to have in each round.
- */
- static char *num_peer_spec;
- /**
- * Handles to all of the running peers.
- */
- static struct GNUNET_TESTBED_Peer **daemons;
- /**
- * Global configuration file
- */
- static struct GNUNET_CONFIGURATION_Handle *testing_cfg;
- /**
- * Maximum number of connections to NSE services.
- */
- static unsigned int connection_limit;
- /**
- * Total number of connections in the whole network.
- */
- static unsigned int total_connections;
- /**
- * File to report results to.
- */
- static struct GNUNET_DISK_FileHandle *output_file;
- /**
- * Filename to log results to.
- */
- static char *output_filename;
- /**
- * File to log connection info, statistics to.
- */
- static struct GNUNET_DISK_FileHandle *data_file;
- /**
- * Filename to log connection info, statistics to.
- */
- static char *data_filename;
- /**
- * How long to wait before triggering next round?
- * Default: 60 s.
- */
- static struct GNUNET_TIME_Relative wait_time = { 60 * 1000 };
- /**
- * DLL head for operation list
- */
- static struct OpListEntry *oplist_head;
- /**
- * DLL tail for operation list
- */
- static struct OpListEntry *oplist_tail;
- /**
- * Task running each round of the experiment.
- */
- static struct GNUNET_SCHEDULER_Task *round_task;
- /**
- * Clean up all of the monitoring connections to NSE and
- * STATISTICS that we keep to selected peers.
- */
- static void
- close_monitor_connections ()
- {
- struct NSEPeer *pos;
- struct OpListEntry *oplist_entry;
- while (NULL != (pos = peer_head))
- {
- if (NULL != pos->nse_op)
- GNUNET_TESTBED_operation_done (pos->nse_op);
- if (NULL != pos->stat_op)
- GNUNET_TESTBED_operation_done (pos->stat_op);
- GNUNET_CONTAINER_DLL_remove (peer_head, peer_tail, pos);
- GNUNET_free (pos);
- }
- while (NULL != (oplist_entry = oplist_head))
- {
- GNUNET_CONTAINER_DLL_remove (oplist_head, oplist_tail, oplist_entry);
- GNUNET_TESTBED_operation_done (oplist_entry->op);
- GNUNET_free (oplist_entry);
- }
- }
- /**
- * Task run on shutdown; cleans up everything.
- *
- * @param cls unused
- */
- static void
- shutdown_task (void *cls)
- {
- LOG_DEBUG ("Ending test.\n");
- close_monitor_connections ();
- if (NULL != round_task)
- {
- GNUNET_SCHEDULER_cancel (round_task);
- round_task = NULL;
- }
- if (NULL != data_file)
- {
- GNUNET_DISK_file_close (data_file);
- data_file = NULL;
- }
- if (NULL != output_file)
- {
- GNUNET_DISK_file_close (output_file);
- output_file = NULL;
- }
- if (NULL != testing_cfg)
- {
- GNUNET_CONFIGURATION_destroy (testing_cfg);
- testing_cfg = NULL;
- }
- }
- /**
- * Callback to call when network size estimate is updated.
- *
- * @param cls closure with the 'struct NSEPeer' providing the update
- * @param timestamp server timestamp
- * @param estimate the value of the current network size estimate
- * @param std_dev standard deviation (rounded down to nearest integer)
- * of the size estimation values seen
- */
- static void
- handle_estimate (void *cls,
- struct GNUNET_TIME_Absolute timestamp,
- double estimate, double std_dev)
- {
- struct NSEPeer *peer = cls;
- char output_buffer[512];
- size_t size;
- if (NULL == output_file)
- {
- FPRINTF (stderr,
- "Received network size estimate from peer %p. Size: %f std.dev. %f\n",
- peer, estimate, std_dev);
- return;
- }
- size = GNUNET_snprintf (output_buffer,
- sizeof (output_buffer),
- "%p %llu %llu %f %f %f\n",
- peer, peers_running,
- (unsigned long long) timestamp.abs_value_us,
- GNUNET_NSE_log_estimate_to_n (estimate), estimate,
- std_dev);
- if (size != GNUNET_DISK_file_write (output_file, output_buffer, size))
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Unable to write to file!\n");
- }
- /**
- * Adapter function called to establish a connection to
- * NSE service.
- *
- * @param cls closure (the 'struct NSEPeer')
- * @param cfg configuration of the peer to connect to; will be available until
- * GNUNET_TESTBED_operation_done() is called on the operation returned
- * from GNUNET_TESTBED_service_connect()
- * @return service handle to return in 'op_result', NULL on error
- */
- static void *
- nse_connect_adapter (void *cls,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- struct NSEPeer *current_peer = cls;
- return GNUNET_NSE_connect (cfg, &handle_estimate, current_peer);
- }
- /**
- * Adapter function called to destroy a connection to
- * NSE service.
- *
- * @param cls closure
- * @param op_result service handle returned from the connect adapter
- */
- static void
- nse_disconnect_adapter (void *cls,
- void *op_result)
- {
- GNUNET_NSE_disconnect (op_result);
- }
- /**
- * Callback function to process statistic values.
- *
- * @param cls `struct NSEPeer`
- * @param subsystem name of subsystem that created the statistic
- * @param name the name of the datum
- * @param value the current value
- * @param is_persistent #GNUNET_YES if the value is persistent, #GNUNET_NO if not
- * @return #GNUNET_OK to continue, #GNUNET_SYSERR to abort iteration
- */
- static int
- stat_iterator (void *cls,
- const char *subsystem,
- const char *name,
- uint64_t value,
- int is_persistent)
- {
- char *output_buffer;
- struct GNUNET_TIME_Absolute now;
- int size;
- unsigned int flag;
- GNUNET_assert (NULL != data_file);
- now = GNUNET_TIME_absolute_get ();
- flag = strcasecmp (subsystem, "core");
- if (0 != flag)
- flag = 1;
- size = GNUNET_asprintf (&output_buffer, "%llu %llu %u\n",
- now.abs_value_us / 1000LL / 1000LL,
- value, flag);
- if (0 > size)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Error formatting output buffer.\n");
- GNUNET_free (output_buffer);
- return GNUNET_SYSERR;
- }
- if (size != GNUNET_DISK_file_write (data_file, output_buffer, (size_t) size))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Unable to write to file!\n");
- GNUNET_free (output_buffer);
- return GNUNET_SYSERR;
- }
- GNUNET_free (output_buffer);
- return GNUNET_OK;
- }
- /**
- * Called to open a connection to the peer's statistics
- *
- * @param cls peer context
- * @param cfg configuration of the peer to connect to; will be available until
- * GNUNET_TESTBED_operation_done() is called on the operation returned
- * from GNUNET_TESTBED_service_connect()
- * @return service handle to return in 'op_result', NULL on error
- */
- static void *
- stat_connect_adapter (void *cls,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- struct NSEPeer *peer = cls;
- peer->sh = GNUNET_STATISTICS_create ("nse-profiler", cfg);
- return peer->sh;
- }
- /**
- * Called to disconnect from peer's statistics service
- *
- * @param cls peer context
- * @param op_result service handle returned from the connect adapter
- */
- static void
- stat_disconnect_adapter (void *cls, void *op_result)
- {
- struct NSEPeer *peer = cls;
- GNUNET_break (GNUNET_OK == GNUNET_STATISTICS_watch_cancel
- (peer->sh, "core", "# peers connected",
- stat_iterator, peer));
- GNUNET_break (GNUNET_OK == GNUNET_STATISTICS_watch_cancel
- (peer->sh, "nse", "# peers connected",
- stat_iterator, peer));
- GNUNET_STATISTICS_destroy (op_result, GNUNET_NO);
- peer->sh = NULL;
- }
- /**
- * Called after successfully opening a connection to a peer's statistics
- * service; we register statistics monitoring for CORE and NSE here.
- *
- * @param cls the callback closure from functions generating an operation
- * @param op the operation that has been finished
- * @param ca_result the service handle returned from GNUNET_TESTBED_ConnectAdapter()
- * @param emsg error message in case the operation has failed; will be NULL if
- * operation has executed successfully.
- */
- static void
- stat_comp_cb (void *cls, struct GNUNET_TESTBED_Operation *op,
- void *ca_result, const char *emsg )
- {
- struct GNUNET_STATISTICS_Handle *sh = ca_result;
- struct NSEPeer *peer = cls;
- if (NULL != emsg)
- {
- GNUNET_break (0);
- return;
- }
- GNUNET_break (GNUNET_OK == GNUNET_STATISTICS_watch
- (sh, "core", "# peers connected",
- stat_iterator, peer));
- GNUNET_break (GNUNET_OK == GNUNET_STATISTICS_watch
- (sh, "nse", "# peers connected",
- stat_iterator, peer));
- }
- /**
- * Task run to connect to the NSE and statistics services to a subset of
- * all of the running peers.
- */
- static void
- connect_nse_service ()
- {
- struct NSEPeer *current_peer;
- unsigned int i;
- unsigned int connections;
- if (0 == connection_limit)
- return;
- LOG_DEBUG ("Connecting to nse service of peers\n");
- connections = 0;
- for (i = 0; i < num_peers_in_round[current_round]; i++)
- {
- if ((num_peers_in_round[current_round] > connection_limit) &&
- (0 != (i % (num_peers_in_round[current_round] / connection_limit))))
- continue;
- LOG_DEBUG ("Connecting to nse service of peer %d\n", i);
- current_peer = GNUNET_new (struct NSEPeer);
- current_peer->daemon = daemons[i];
- current_peer->nse_op
- = GNUNET_TESTBED_service_connect (NULL,
- current_peer->daemon,
- "nse",
- NULL, NULL,
- &nse_connect_adapter,
- &nse_disconnect_adapter,
- current_peer);
- if (NULL != data_file)
- current_peer->stat_op
- = GNUNET_TESTBED_service_connect (NULL,
- current_peer->daemon,
- "statistics",
- stat_comp_cb,
- current_peer,
- &stat_connect_adapter,
- &stat_disconnect_adapter,
- current_peer);
- GNUNET_CONTAINER_DLL_insert (peer_head, peer_tail, current_peer);
- if (++connections == connection_limit)
- break;
- }
- }
- /**
- * Task that starts/stops peers to move to the next round.
- *
- * @param cls NULL, unused
- */
- static void
- next_round (void *cls);
- /**
- * We're at the end of a round. Stop monitoring, write total
- * number of connections to log and get full stats. Then trigger
- * the next round.
- *
- * @param cls unused, NULL
- */
- static void
- finish_round (void *cls)
- {
- LOG (GNUNET_ERROR_TYPE_INFO,
- "Have %u connections\n",
- total_connections);
- close_monitor_connections ();
- round_task = GNUNET_SCHEDULER_add_now (&next_round, NULL);
- }
- /**
- * We have reached the desired number of peers for the current round.
- * Run it (by connecting and monitoring a few peers and waiting the
- * specified delay before finishing the round).
- */
- static void
- run_round ()
- {
- LOG_DEBUG ("Running round %u\n",
- current_round);
- connect_nse_service ();
- GNUNET_SCHEDULER_add_delayed (wait_time,
- &finish_round,
- NULL);
- }
- /**
- * Creates an oplist entry and adds it to the oplist DLL
- */
- static struct OpListEntry *
- make_oplist_entry ()
- {
- struct OpListEntry *entry;
- entry = GNUNET_new (struct OpListEntry);
- GNUNET_CONTAINER_DLL_insert_tail (oplist_head,
- oplist_tail,
- entry);
- return entry;
- }
- /**
- * Callback to be called when NSE service is started or stopped at peers
- *
- * @param cls NULL
- * @param op the operation handle
- * @param emsg NULL on success; otherwise an error description
- */
- static void
- manage_service_cb (void *cls,
- struct GNUNET_TESTBED_Operation *op,
- const char *emsg)
- {
- struct OpListEntry *entry = cls;
- GNUNET_TESTBED_operation_done (entry->op);
- if (NULL != emsg)
- {
- LOG (GNUNET_ERROR_TYPE_ERROR, "Failed to start/stop NSE at a peer\n");
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- GNUNET_assert (0 != entry->delta);
- peers_running += entry->delta;
- GNUNET_CONTAINER_DLL_remove (oplist_head,
- oplist_tail,
- entry);
- GNUNET_free (entry);
- if (num_peers_in_round[current_round] == peers_running)
- run_round ();
- }
- /**
- * Adjust the number of running peers to match the required number of running
- * peers for the round
- */
- static void
- adjust_running_peers ()
- {
- struct OpListEntry *entry;
- unsigned int i;
- /* start peers if we have too few */
- for (i=peers_running;i<num_peers_in_round[current_round];i++)
- {
- entry = make_oplist_entry ();
- entry->delta = 1;
- entry->op = GNUNET_TESTBED_peer_manage_service (NULL,
- daemons[i],
- "nse",
- &manage_service_cb,
- entry,
- 1);
- }
- /* stop peers if we have too many */
- for (i=num_peers_in_round[current_round];i<peers_running;i++)
- {
- entry = make_oplist_entry ();
- entry->delta = -1;
- entry->op = GNUNET_TESTBED_peer_manage_service (NULL,
- daemons[i],
- "nse",
- &manage_service_cb,
- entry,
- 0);
- }
- }
- /**
- * Task run at the end of a round. Disconnect from all monitored
- * peers; then get statistics from *all* peers.
- *
- * @param cls NULL, unused
- */
- static void
- next_round (void *cls)
- {
- round_task = NULL;
- LOG_DEBUG ("Disconnecting nse service of peers\n");
- current_round++;
- if (current_round == num_rounds)
- {
- /* this was the last round, terminate */
- ok = 0;
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- if (num_peers_in_round[current_round] == peers_running)
- {
- /* no need to churn, just run next round */
- run_round ();
- return;
- }
- adjust_running_peers ();
- }
- /**
- * Function that will be called whenever something in the
- * testbed changes.
- *
- * @param cls closure, NULL
- * @param event information on what is happening
- */
- static void
- master_controller_cb (void *cls,
- const struct GNUNET_TESTBED_EventInformation *event)
- {
- switch (event->type)
- {
- case GNUNET_TESTBED_ET_CONNECT:
- total_connections++;
- break;
- case GNUNET_TESTBED_ET_DISCONNECT:
- total_connections--;
- break;
- default:
- break;
- }
- }
- /**
- * Signature of a main function for a testcase.
- *
- * @param cls NULL
- * @param h the run handle
- * @param num_peers_ number of peers in 'peers'
- * @param peers handle to peers run in the testbed. NULL upon timeout (see
- * GNUNET_TESTBED_test_run()).
- * @param links_succeeded the number of overlay link connection attempts that
- * succeeded
- * @param links_failed the number of overlay link connection attempts that
- * failed
- */
- static void
- test_master (void *cls,
- struct GNUNET_TESTBED_RunHandle *h,
- unsigned int num_peers_,
- struct GNUNET_TESTBED_Peer **peers,
- unsigned int links_succeeded,
- unsigned int links_failed)
- {
- if (NULL == peers)
- {
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- daemons = peers;
- GNUNET_break (num_peers_ == num_peers);
- peers_running = num_peers;
- if (num_peers_in_round[current_round] == peers_running)
- {
- /* no need to churn, just run the starting round */
- run_round ();
- return;
- }
- adjust_running_peers ();
- }
- /**
- * Actual main function that runs the emulation.
- *
- * @param cls unused
- * @param args remaining args, unused
- * @param cfgfile name of the configuration
- * @param cfg configuration handle
- */
- static void
- run (void *cls, char *const *args, const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- char *tok;
- uint64_t event_mask;
- unsigned int num;
- ok = 1;
- testing_cfg = GNUNET_CONFIGURATION_dup (cfg);
- LOG_DEBUG ("Starting daemons.\n");
- if (NULL == num_peer_spec)
- {
- fprintf (stderr, "You need to specify the number of peers to run\n");
- return;
- }
- for (tok = strtok (num_peer_spec, ","); NULL != tok; tok = strtok (NULL, ","))
- {
- if (1 != sscanf (tok, "%u", &num))
- {
- fprintf (stderr, "You need to specify numbers, not `%s'\n", tok);
- return;
- }
- if (0 == num)
- {
- fprintf (stderr, "Refusing to run a round with 0 peers\n");
- return;
- }
- GNUNET_array_append (num_peers_in_round, num_rounds, num);
- num_peers = GNUNET_MAX (num_peers, num);
- }
- if (0 == num_peers)
- {
- fprintf (stderr, "Refusing to run a testbed with no rounds\n");
- return;
- }
- if ( (NULL != data_filename) &&
- (NULL == (data_file =
- GNUNET_DISK_file_open (data_filename,
- GNUNET_DISK_OPEN_READWRITE |
- GNUNET_DISK_OPEN_TRUNCATE |
- GNUNET_DISK_OPEN_CREATE,
- GNUNET_DISK_PERM_USER_READ |
- GNUNET_DISK_PERM_USER_WRITE))) )
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
- "open",
- data_filename);
- if ( (NULL != output_filename) &&
- (NULL == (output_file =
- GNUNET_DISK_file_open (output_filename,
- GNUNET_DISK_OPEN_READWRITE |
- GNUNET_DISK_OPEN_CREATE,
- GNUNET_DISK_PERM_USER_READ |
- GNUNET_DISK_PERM_USER_WRITE))) )
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open",
- output_filename);
- event_mask = 0LL;
- event_mask |= (1LL << GNUNET_TESTBED_ET_PEER_START);
- event_mask |= (1LL << GNUNET_TESTBED_ET_PEER_STOP);
- event_mask |= (1LL << GNUNET_TESTBED_ET_CONNECT);
- event_mask |= (1LL << GNUNET_TESTBED_ET_DISCONNECT);
- GNUNET_TESTBED_run (hosts_file,
- cfg,
- num_peers,
- event_mask,
- master_controller_cb,
- NULL, /* master_controller_cb cls */
- &test_master,
- NULL); /* test_master cls */
- GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
- }
- /**
- * Main function.
- *
- * @return 0 on success
- */
- int
- main (int argc, char *const *argv)
- {
- struct GNUNET_GETOPT_CommandLineOption options[] = {
- GNUNET_GETOPT_option_uint ('C',
- "connections",
- "COUNT",
- gettext_noop ("limit to the number of connections to NSE services, 0 for none"),
- &connection_limit),
- GNUNET_GETOPT_option_string ('d',
- "details",
- "FILENAME",
- gettext_noop ("name of the file for writing connection information and statistics"),
- &data_filename),
- GNUNET_GETOPT_option_string ('H',
- "hosts",
- "FILENAME",
- gettext_noop ("name of the file with the login information for the testbed"),
- &hosts_file),
- GNUNET_GETOPT_option_string ('o',
- "output",
- "FILENAME",
- gettext_noop ("name of the file for writing the main results"),
- &output_filename),
- GNUNET_GETOPT_option_string ('p',
- "peers",
- "NETWORKSIZESPEC",
- gettext_noop ("Number of peers to run in each round, separated by commas"),
- &num_peer_spec),
- GNUNET_GETOPT_option_increment_uint ('V',
- "verbose",
- gettext_noop ("be verbose (print progress information)"),
- &verbose),
- GNUNET_GETOPT_option_relative_time ('w',
- "wait",
- "DELAY",
- gettext_noop ("delay between rounds"),
- &wait_time),
- GNUNET_GETOPT_OPTION_END
- };
- if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
- return 2;
- if (GNUNET_OK !=
- GNUNET_PROGRAM_run (argc, argv, "nse-profiler",
- gettext_noop
- ("Measure quality and performance of the NSE service."),
- options, &run, NULL))
- ok = 1;
- return ok;
- }
- /* end of nse-profiler.c */
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