/**
* @file dht/gnunet_dht_profiler.c
* @brief Profiler for GNUnet DHT
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_testbed_service.h"
+#include "gnunet_dht_service.h"
+
+#define INFO(...) \
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO, __VA_ARGS__)
+
+#define DEBUG(...) \
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
/**
* Number of peers which should perform a PUT out of 100 peers
static char *hosts_file;
/**
- * Number of peers
+ * Context for a peer which actively does DHT PUT/GET
*/
-static unsigned int num_peers;
+struct ActiveContext;
/**
* Context to hold data of peer
*/
struct Context
{
+
+ /**
+ * The testbed peer this context belongs to
+ */
+ struct GNUNET_TESTBED_Peer *peer;
+
/**
* Testbed operation acting on this peer
*/
struct GNUNET_TESTBED_Operation *op;
/**
- * Delay task
+ * Active context; NULL if this peer is not an active peer
*/
- struct GNUNET_SCHEDULER_TaskIdentifier delay_task;
+ struct ActiveContext *ac;
};
/**
- * Context for the data we put into DHT
+ * Context for a peer which actively does DHT PUT/GET
*/
-struct DataContext
+struct ActiveContext
{
/**
- * next ptr for the DLL
+ * The linked peer context
+ */
+ struct Context *ctx;
+
+ /**
+ * Handler to the DHT service
*/
- struct Data *next;
+ struct GNUNET_DHT_Handle *dht;
/**
- * prev ptr for the DLL
+ * The data used for do a PUT. Will be NULL if a PUT hasn't been performed yet
*/
- struct Data *prev;
+ void *put_data;
/**
- * The size of the data
+ * The active context used for our DHT GET
*/
- size_t size;
+ struct ActiveContext *get_ac;
/**
- * The data follows here
+ * The put handle
*/
+ struct GNUNET_DHT_PutHandle *dht_put;
+
+ /**
+ * The get handle
+ */
+ struct GNUNET_DHT_GetHandle *dht_get;
+
+ /**
+ * The hash of the @e put_data
+ */
+ struct GNUNET_HashCode hash;
+
+ /**
+ * Delay task
+ */
+ GNUNET_SCHEDULER_TaskIdentifier delay_task;
+
+ /**
+ * The size of the @e put_data
+ */
+ uint16_t put_data_size;
+
+ /**
+ * The number of peers currently doing GET on our data
+ */
+ uint16_t nrefs;
};
/**
* An array of contexts. The size of this array should be equal to @a num_peers
*/
-struct Context *a_ctx;
+static struct Context *a_ctx;
+
+/**
+ * Array of active peers
+ */
+static struct ActiveContext *a_ac;
+
+/**
+ * The delay between starting to do PUTS and GETS
+ */
+static struct GNUNET_TIME_Relative delay;
+/**
+ * The timeout for GET and PUT
+ */
+static struct GNUNET_TIME_Relative timeout;
/**
- * Shutdown task. Cleanup all resources and operations
+ * Number of peers
+ */
+static unsigned int num_peers;
+
+/**
+ * Number of active peers
+ */
+static unsigned int n_active;
+
+/**
+ * Number of DHT service connections we currently have
+ */
+static unsigned int n_dht;
+
+/**
+ * Number of DHT PUTs made
+ */
+static unsigned int n_puts;
+
+/**
+ * Number of DHT PUTs succeeded
+ */
+static unsigned int n_puts_ok;
+
+/**
+ * Number of DHT PUTs failed
+ */
+static unsigned int n_puts_fail;
+
+/**
+ * Number of DHT GETs made
+ */
+static unsigned int n_gets;
+
+/**
+ * Number of DHT GETs succeeded
+ */
+static unsigned int n_gets_ok;
+
+/**
+ * Number of DHT GETs succeeded
+ */
+static unsigned int n_gets_fail;
+
+
+/**
+ * Shutdown task. Cleanup all resources and operations.
*
* @param cls NULL
* @param tc scheduler task context
static void
do_shutdown (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
+ struct ActiveContext *ac;
unsigned int cnt;
-
+
if (NULL != a_ctx)
{
- for (cnt=0; cnt < num_peers, cnt++)
+ for (cnt=0; cnt < num_peers; cnt++)
{
- if (NULL == a_ctx[cnt].op)
+ if (NULL != a_ctx[cnt].op)
+ GNUNET_TESTBED_operation_done (a_ctx[cnt].op);
+
+ /* Cleanup active context if this peer is an active peer */
+ ac = a_ctx[cnt].ac;
+ if (NULL == ac)
continue;
- GNUNET_TESTBED_operation_done (a_ctx[cnt].op);
- a_ctx[cnt].op = NULL;
+ if (GNUNET_SCHEDULER_NO_TASK != ac->delay_task)
+ GNUNET_SCHEDULER_cancel (ac->delay_task);
+ if (NULL != ac->put_data)
+ GNUNET_free (ac->put_data);
+ if (NULL != ac->dht_put)
+ GNUNET_DHT_put_cancel (ac->dht_put);
+ if (NULL != ac->dht_get)
+ GNUNET_DHT_get_stop (ac->dht_get);
}
GNUNET_free (a_ctx);
a_ctx = NULL;
}
+ GNUNET_free_non_null (a_ac);
+}
+
+
+static void
+summarize ()
+{
+ INFO ("# PUTS made: %u\n", n_puts);
+ INFO ("# PUTS succeeded: %u\n", n_puts_ok);
+ INFO ("# PUTS failed: %u\n", n_puts_fail);
+ INFO ("# GETS made: %u\n", n_gets);
+ INFO ("# GETS succeeded: %u\n", n_gets_ok);
+ INFO ("# GETS failed: %u\n", n_gets_fail);
+ GNUNET_SCHEDULER_shutdown ();
+}
+
+
+/**
+ * Task to cancel DHT GET.
+ *
+ * @param cls NULL
+ * @param tc scheduler task context
+ */
+static void
+cancel_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct ActiveContext *ac = cls;
+
+ ac->delay_task = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_assert (NULL != ac->dht_get);
+ GNUNET_DHT_get_stop (ac->dht_get);
+ ac->dht_get = NULL;
+ n_gets_fail++;
+
+ /* If profiling is complete, summarize */
+ if (n_gets == n_gets_fail + n_gets_ok)
+ summarize ();
+}
+
+
+/**
+ * Iterator called on each result obtained for a DHT
+ * operation that expects a reply
+ *
+ * @param cls closure
+ * @param exp when will this value expire
+ * @param key key of the result
+ * @param get_path peers on reply path (or NULL if not recorded)
+ * [0] = datastore's first neighbor, [length - 1] = local peer
+ * @param get_path_length number of entries in @a get_path
+ * @param put_path peers on the PUT path (or NULL if not recorded)
+ * [0] = origin, [length - 1] = datastore
+ * @param put_path_length number of entries in @a put_path
+ * @param type type of the result
+ * @param size number of bytes in @a data
+ * @param data pointer to the result data
+ */
+static void
+get_iter (void *cls,
+ struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode *key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length,
+ enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data)
+{
+ struct ActiveContext *ac = cls;
+ struct ActiveContext *get_ac = ac->get_ac;
+
+ if (get_ac->put_data_size != size)
+ {
+ DEBUG ("Found a GET with incorrect data length (this may happen, but very unlikely)\n");
+ return;
+ }
+ if (0 != memcmp (data, get_ac->put_data, size))
+ {
+ DEBUG ("Found a GET with incorrect data (this may happen, but very unlikely)\n");
+ return;
+ }
+
+ /* we found the data we are looking for */
+ DEBUG ("We found a GET request; %u remaining\n", n_gets - (n_gets_fail + n_gets_ok));
+ n_gets_ok++;
+ get_ac->nrefs--;
+ GNUNET_DHT_get_stop (ac->dht_get);
+ ac->dht_get = NULL;
+ GNUNET_SCHEDULER_cancel (ac->delay_task);
+ ac->delay_task = GNUNET_SCHEDULER_NO_TASK;
+
+ /* Summarize if profiling is complete */
+ if (n_gets == n_gets_fail + n_gets_ok)
+ summarize ();
+}
+
+
+/**
+ * Task to do DHT GETs
+ *
+ * @param cls the active context
+ * @param tc the scheduler task context
+ */
+static void
+delayed_get (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct ActiveContext *ac = cls;
+ struct ActiveContext *get_ac;
+ unsigned int r;
+
+ ac->delay_task = GNUNET_SCHEDULER_NO_TASK;
+ get_ac = NULL;
+ while (1)
+ {
+ r = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, n_active);
+ get_ac = &a_ac[r];
+ if (NULL != get_ac->put_data)
+ break;
+ }
+ get_ac->nrefs++;
+ ac->get_ac = get_ac;
+ ac->dht_get = GNUNET_DHT_get_start (ac->dht,
+ GNUNET_BLOCK_TYPE_TEST,
+ &ac->hash,
+ 1, /* replication level */
+ GNUNET_DHT_RO_NONE,
+ NULL, 0, /* extended query and size */
+ get_iter, ac); /* GET iterator and closure
+ */
+ n_gets++;
+
+ /* schedule the timeout task for GET */
+ ac->delay_task = GNUNET_SCHEDULER_add_delayed (timeout, &cancel_get, ac);
+}
+
+
+/**
+ * Queue up a delayed task for doing DHT GET
+ *
+ * @param cls the active context
+ * @param success #GNUNET_OK if the PUT was transmitted,
+ * #GNUNET_NO on timeout,
+ * #GNUNET_SYSERR on disconnect from service
+ * after the PUT message was transmitted
+ * (so we don't know if it was received or not)
+ */
+static void
+put_cont (void *cls, int success)
+{
+ struct ActiveContext *ac = cls;
+
+ ac->dht_put = NULL;
+ if (success)
+ n_puts_ok++;
+ else
+ n_puts_fail++;
+ ac->delay_task = GNUNET_SCHEDULER_add_delayed (delay, &delayed_get, ac);
+}
+
+
+/**
+ * Task to do DHT PUTS
+ *
+ * @param cls the active context
+ * @param tc the scheduler task context
+ */
+static void
+delayed_put (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct ActiveContext *ac = cls;
+
+ ac->delay_task = GNUNET_SCHEDULER_NO_TASK;
+ /* Generate and DHT PUT some random data */
+ ac->put_data_size = 16; /* minimum */
+ ac->put_data_size += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ (63*1024));
+ ac->put_data = GNUNET_malloc (ac->put_data_size);
+ GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
+ ac->put_data, ac->put_data_size);
+ GNUNET_CRYPTO_hash (ac->put_data, ac->put_data_size, &ac->hash);
+ DEBUG ("Doing a DHT PUT with data of size %u\n", ac->put_data_size);
+ ac->dht_put = GNUNET_DHT_put (ac->dht, &ac->hash,
+ 1, /* replication level */
+ GNUNET_DHT_RO_NONE,
+ GNUNET_BLOCK_TYPE_TEST,
+ ac->put_data_size,
+ ac->put_data,
+ GNUNET_TIME_UNIT_FOREVER_ABS, /* expiration time */
+ timeout, /* PUT timeout */
+ put_cont, ac); /* continuation and its closure */
+ n_puts++;
+}
+
+
+/**
+ * Connection to DHT has been established. Call the delay task.
+ *
+ * @param cls the active context
+ * @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
+dht_connected (void *cls,
+ struct GNUNET_TESTBED_Operation *op,
+ void *ca_result,
+ const char *emsg)
+{
+ struct ActiveContext *ac = cls;
+ struct Context *ctx = ac->ctx;
+
+ GNUNET_assert (NULL != ctx);
+ GNUNET_assert (NULL != ctx->op);
+ GNUNET_assert (ctx->op == op);
+ ac->dht = (struct GNUNET_DHT_Handle *) ca_result;
+ if (NULL != emsg)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Connection to DHT service failed: %s\n", emsg);
+ GNUNET_TESTBED_operation_done (ctx->op); /* Calls dht_disconnect() */
+ ctx->op = NULL;
+ return;
+ }
+ ac->delay_task = GNUNET_SCHEDULER_add_delayed (delay, &delayed_put, ac);
+}
+
+
+/**
+ * Connect to DHT service and return the DHT client handler
+ *
+ * @param cls the active 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 *
+dht_connect (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+ n_dht++;
+ return GNUNET_DHT_connect (cfg, 10);
+}
+
+
+/**
+ * Adapter function called to destroy a connection to
+ * a service.
+ *
+ * @param cls the active context
+ * @param op_result service handle returned from the connect adapter
+ */
+static void
+dht_disconnect (void *cls, void *op_result)
+{
+ struct ActiveContext *ac = cls;
+
+ GNUNET_assert (NULL != ac->dht);
+ GNUNET_assert (ac->dht == op_result);
+ GNUNET_DHT_disconnect (ac->dht);
+ n_dht--;
+ if (0 == n_dht)
+ GNUNET_SCHEDULER_shutdown ();
}
GNUNET_assert (NULL != ctx->op);
GNUNET_TESTBED_operation_done (ctx->op);
ctx->op = NULL;
- if (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 100)
- >= PUT_PROBABILITY)
+ if (NULL == ctx->ac)
return;
- /* FIXME: connect to the DHT service and wait initwait before starting a PUT */
+ /* FIXME: connect to the DHT service and wait before starting a PUT */
+ ctx->op = GNUNET_TESTBED_service_connect (ctx, ctx->peer,
+ "dht",
+ &dht_connected, ctx->ac,
+ &dht_connect,
+ &dht_disconnect,
+ ctx->ac);
}
unsigned int links_succeeded,
unsigned int links_failed)
{
- int cnt;
+ unsigned int cnt;
+ unsigned int ac_cnt;
if (NULL == peers)
{
/* exit */
GNUNET_assert (0);
}
+ INFO ("%u peers started\n", num_peers);
a_ctx = GNUNET_malloc (sizeof (struct Context) * num_peers);
- for (cnt = 0; cnt < num_peers, cnt++)
+
+ /* select the peers which actively participate in profiling */
+ n_active = num_peers * PUT_PROBABILITY / 100;
+ if (0 == n_active)
+ {
+ GNUNET_SCHEDULER_shutdown ();
+ GNUNET_free (a_ctx);
+ return;
+ }
+ a_ac = GNUNET_malloc (n_active * sizeof (struct ActiveContext));
+ ac_cnt = 0;
+ for (cnt = 0; cnt < num_peers && ac_cnt < n_active; cnt++)
{
+ if (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 100) >=
+ PUT_PROBABILITY)
+ continue;
+ a_ctx[cnt].ac = &a_ac[ac_cnt];
+ a_ac[ac_cnt].ctx = &a_ctx[cnt];
+ ac_cnt++;
+ }
+ n_active = ac_cnt;
+ a_ac = GNUNET_realloc (a_ac, n_active * sizeof (struct ActiveContext));
+ INFO ("Active peers: %u\n", n_active);
+
+ /* start DHT service on all peers */
+ for (cnt = 0; cnt < num_peers; cnt++)
+ {
+ a_ctx[cnt].peer = peers[cnt];
a_ctx[cnt].op = GNUNET_TESTBED_peer_manage_service (&a_ctx[cnt],
peers[cnt],
"dht",
const struct GNUNET_CONFIGURATION_Handle *config)
{
uint64_t event_mask;
-
+
if (0 == num_peers)
{
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Exiting as the number of peers is %u\n"),
- num_peers);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Exiting as the number of peers is %u\n"),
+ num_peers);
return;
}
cfg = GNUNET_CONFIGURATION_dup (config);
event_mask = 0;
GNUNET_TESTBED_run (hosts_file, cfg, num_peers, event_mask, NULL,
NULL, &test_run, NULL);
- abort_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &do_abort,
- NULL);
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &do_shutdown,
+ NULL);
}
int
main (int argc, char *const *argv)
{
+ int rc;
+
static struct GNUNET_GETOPT_CommandLineOption options[] = {
{'n', "peers", "COUNT",
gettext_noop ("number of peers to start"),
{'H', "hosts", "FILENAME",
gettext_noop ("name of the file with the login information for the testbed"),
1, &GNUNET_GETOPT_set_string, &hosts_file},
- {'d', "initwait", "DELAY",
- gettext_noop ("delay to allow DHT to stabilize after starting the peers"),
- 1, &GNUNET_GETOPT_set_relative_time, &init_wait},
- {'w', "wait", "DELAY",
- gettext_noop ("delay between rounds"),
- 1, &GNUNET_GETOPT_set_relative_time, &wait_time},
+ {'d', "delay", "DELAY",
+ gettext_noop ("delay for starting DHT PUT and GET"),
+ 1, &GNUNET_GETOPT_set_relative_time, &delay},
+ {'t', "timeout", "TIMEOUT",
+ gettext_noop ("timeout for DHT PUT and GET requests"),
+ 1, &GNUNET_GETOPT_set_relative_time, &timeout},
GNUNET_GETOPT_OPTION_END
};
if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
return 2;
+ delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3); /* default delay */
+ timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3); /* default timeout */
+ rc = 0;
if (GNUNET_OK !=
GNUNET_PROGRAM_run (argc, argv, "dht-profiler",
gettext_noop
("Measure quality and performance of the DHT service."),
options, &run, NULL))
- ok = 1;
- return ok;
+ rc = 1;
+ return rc;
}
projects / oweals / gnunet.git / blobdiff