ats benchmark: traffic generator More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "ats-testing.h"

Include dependency graph for ats-testing-traffic.c:

Functions
static struct GNUNET_TIME_Relative	get_delay (struct TrafficGenerator *tg)

static void	update_ping_data (void *cls)

static void	comm_schedule_send (void *cls)

static void	update_pong_data (void *cls)

void	GNUNET_ATS_TEST_traffic_handle_ping (struct BenchmarkPartner *p)

void	GNUNET_ATS_TEST_traffic_handle_pong (struct BenchmarkPartner *p)

struct TrafficGenerator *	GNUNET_ATS_TEST_generate_traffic_start (struct BenchmarkPeer src, struct BenchmarkPartner dest, enum GeneratorType type, unsigned int base_rate, unsigned int max_rate, struct GNUNET_TIME_Relative period, struct GNUNET_TIME_Relative duration)
	Generate between the source master and the partner and send traffic with a maximum rate. More...

void	GNUNET_ATS_TEST_generate_traffic_stop (struct TrafficGenerator *tg)

void	GNUNET_ATS_TEST_generate_traffic_stop_all ()
	Stop all traffic generators. More...

Variables
static struct TrafficGenerator *	tg_head

static struct TrafficGenerator *	tg_tail

struct GNUNET_ATS_TEST_Topology *	top

Detailed Description

ats benchmark: traffic generator

Author: Christian Grothoff; Matthias Wachs

Definition in file ats-testing-traffic.c.

Function Documentation

◆ get_delay()

static struct GNUNET_TIME_Relative get_delay ( struct TrafficGenerator * tg )

static

Definition at line 36 of file ats-testing-traffic.c.

References delay, GNUNET_ATS_TEST_TG_CONSTANT, GNUNET_ATS_TEST_TG_LINEAR, GNUNET_ATS_TEST_TG_RANDOM, GNUNET_ATS_TEST_TG_SINUS, GNUNET_break, GNUNET_CRYPTO_QUALITY_WEAK, GNUNET_CRYPTO_random_u32(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_TIME_absolute_get_duration(), GNUNET_TIME_UNIT_SECONDS, GNUNET_TIME_UNIT_ZERO, GNUNET_TIME_Relative::rel_value_us, and TEST_MESSAGE_SIZE.

Referenced by update_ping_data().

 {
   struct GNUNET_TIME_Relative delay;
   struct GNUNET_TIME_Relative time_delta;
   long long int cur_rate;
   long long int delta_rate;
 
   delay.rel_value_us = 0;
 
   /* Calculate the current transmission rate based on the type of traffic */
   switch (tg->type) {
     case GNUNET_ATS_TEST_TG_CONSTANT:
       if (UINT32_MAX == tg->base_rate)
         return GNUNET_TIME_UNIT_ZERO;
       cur_rate = tg->base_rate;
       break;
     case GNUNET_ATS_TEST_TG_LINEAR:
       time_delta = GNUNET_TIME_absolute_get_duration(tg->time_start);
       /* Calculate point of time in the current period */
       time_delta.rel_value_us = time_delta.rel_value_us % tg->duration_period.rel_value_us;
       delta_rate = ((double) time_delta.rel_value_us  / tg->duration_period.rel_value_us) *
           (tg->max_rate - tg->base_rate);
       if ((tg->max_rate < tg->base_rate) && ((tg->max_rate - tg->base_rate) > tg->base_rate))
       {
         /* This will cause an underflow */
         GNUNET_break (0);
       }
       cur_rate = tg->base_rate + delta_rate;
       break;
     case GNUNET_ATS_TEST_TG_RANDOM:
       cur_rate = tg->base_rate + GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
           tg->max_rate - tg->base_rate);
       break;
     case GNUNET_ATS_TEST_TG_SINUS:
       time_delta = GNUNET_TIME_absolute_get_duration(tg->time_start);
       /* Calculate point of time in the current period */
       time_delta.rel_value_us = time_delta.rel_value_us % tg->duration_period.rel_value_us;
       if ((tg->max_rate - tg->base_rate) > tg->base_rate)
       {
         /* This will cause an underflow for second half of sinus period,
          * will be detected in general when experiments are loaded */
         GNUNET_break (0);
       }
       delta_rate = (tg->max_rate - tg->base_rate) *
           sin ( (2 * M_PI) / ((double) tg->duration_period.rel_value_us) * time_delta.rel_value_us);
       cur_rate = tg->base_rate + delta_rate;
       break;
     default:
       return delay;
       break;
   }
 
   if (cur_rate < 0)
   {
     cur_rate = 1;
   }
   /* Calculate the delay for the next message based on the current delay  */
   delay.rel_value_us =  GNUNET_TIME_UNIT_SECONDS.rel_value_us * TEST_MESSAGE_SIZE / cur_rate;
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Current rate is %lld, calculated delay is %llu\n",
               cur_rate,
               (unsigned long long) delay.rel_value_us);
   return delay;
 }

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◆ update_ping_data()

static void update_ping_data ( void * cls )

static

Definition at line 104 of file ats-testing-traffic.c.

References BenchmarkPartner::bytes_sent, get_delay(), GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_absolute_add(), GNUNET_TIME_absolute_get(), GNUNET_YES, BenchmarkPartner::me, BenchmarkPartner::messages_sent, TrafficGenerator::next_ping_transmission, p, TEST_MESSAGE_SIZE, BenchmarkPartner::tg, BenchmarkPeer::total_bytes_sent, and BenchmarkPeer::total_messages_sent.

Referenced by comm_schedule_send().

 {
   struct BenchmarkPartner *p = cls;
   struct GNUNET_TIME_Relative delay;
 
   p->messages_sent++;
   p->bytes_sent += TEST_MESSAGE_SIZE;
   p->me->total_messages_sent++;
   p->me->total_bytes_sent += TEST_MESSAGE_SIZE;
 
   if (NULL == p->tg)
   {
     GNUNET_break (0);
     return;
   }
   delay = get_delay (p->tg);
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Delay for next transmission %s\n",
               GNUNET_STRINGS_relative_time_to_string (delay,
                                                       GNUNET_YES));
   p->tg->next_ping_transmission
     = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get(),
                                 delay);
 }

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◆ comm_schedule_send()

static void comm_schedule_send ( void * cls )

static

Definition at line 131 of file ats-testing-traffic.c.

References BenchmarkPartner::dest, env, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MQ_msg, GNUNET_MQ_notify_sent(), GNUNET_MQ_send(), GNUNET_TIME_absolute_get(), BenchmarkPartner::last_message_sent, BenchmarkPartner::me, BenchmarkPartner::mq, msg, BenchmarkPeer::no, p, TestMessage::padding, TrafficGenerator::send_task, TEST_MESSAGE_TYPE_PING, BenchmarkPartner::tg, and update_ping_data().

Referenced by GNUNET_ATS_TEST_generate_traffic_start(), and GNUNET_ATS_TEST_traffic_handle_pong().

 {
   struct BenchmarkPartner *p = cls;
   struct TestMessage *msg;
   struct GNUNET_MQ_Envelope *env;
 
   p->tg->send_task = NULL;
   p->last_message_sent = GNUNET_TIME_absolute_get();
   env = GNUNET_MQ_msg (msg,
                        TEST_MESSAGE_TYPE_PING);
   memset (msg->padding,
           'a',
           sizeof (msg->padding));
   GNUNET_MQ_notify_sent (env,
                          &update_ping_data,
                          p);
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Master [%u]: Sending PING to [%u]\n",
               p->me->no,
               p->dest->no);
   GNUNET_MQ_send (p->mq,
                   env);
 }

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◆ update_pong_data()

static void update_pong_data ( void * cls )

static

Definition at line 157 of file ats-testing-traffic.c.

References BenchmarkPartner::bytes_sent, BenchmarkPartner::me, BenchmarkPartner::messages_sent, p, TEST_MESSAGE_SIZE, BenchmarkPeer::total_bytes_sent, and BenchmarkPeer::total_messages_sent.

Referenced by GNUNET_ATS_TEST_traffic_handle_ping().

 {
   struct BenchmarkPartner *p = cls;
 
   p->messages_sent++;
   p->bytes_sent += TEST_MESSAGE_SIZE;
   p->me->total_messages_sent++;
   p->me->total_bytes_sent += TEST_MESSAGE_SIZE;
 }

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◆ GNUNET_ATS_TEST_traffic_handle_ping()

void GNUNET_ATS_TEST_traffic_handle_ping ( struct BenchmarkPartner * p )

Definition at line 169 of file ats-testing-traffic.c.

References BenchmarkPartner::bytes_received, BenchmarkPartner::dest, env, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MQ_msg, GNUNET_MQ_notify_sent(), GNUNET_MQ_send(), BenchmarkPartner::me, BenchmarkPartner::messages_received, BenchmarkPartner::mq, msg, BenchmarkPeer::no, TestMessage::padding, TEST_MESSAGE_SIZE, TEST_MESSAGE_TYPE_PING, BenchmarkPeer::total_bytes_received, BenchmarkPeer::total_messages_received, and update_pong_data().

Referenced by handle_ping().

 {
   struct TestMessage *msg;
   struct GNUNET_MQ_Envelope *env;
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Slave [%u]: Received PING from [%u], sending PONG\n",
               p->me->no,
               p->dest->no);
   p->messages_received++;
   p->bytes_received += TEST_MESSAGE_SIZE;
   p->me->total_messages_received++;
   p->me->total_bytes_received += TEST_MESSAGE_SIZE;
 
   
   env = GNUNET_MQ_msg (msg,
                        TEST_MESSAGE_TYPE_PING);
   memset (msg->padding,
           'a',
           sizeof (msg->padding));
   GNUNET_MQ_notify_sent (env,
                          &update_pong_data,
                          p);
   GNUNET_MQ_send (p->mq,
                   env);
 }

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◆ GNUNET_ATS_TEST_traffic_handle_pong()

void GNUNET_ATS_TEST_traffic_handle_pong ( struct BenchmarkPartner * p )

Definition at line 198 of file ats-testing-traffic.c.

References TrafficGenerator::base_rate, BenchmarkPartner::bytes_received, comm_schedule_send(), BenchmarkPartner::dest, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_now(), GNUNET_TIME_absolute_get(), GNUNET_TIME_absolute_get_difference(), GNUNET_TIME_absolute_get_remaining(), GNUNET_TIME_relative_min(), GNUNET_TIME_UNIT_SECONDS, BenchmarkPartner::last_message_sent, BenchmarkPartner::me, BenchmarkPartner::messages_received, TrafficGenerator::next_ping_transmission, BenchmarkPeer::no, GNUNET_TIME_Relative::rel_value_us, TrafficGenerator::send_task, TEST_MESSAGE_SIZE, BenchmarkPartner::tg, BenchmarkPartner::total_app_rtt, BenchmarkPeer::total_bytes_received, and BenchmarkPeer::total_messages_received.

Referenced by handle_pong().

 {
   struct GNUNET_TIME_Relative left;
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "Master [%u]: Received PONG from [%u], next message\n",
               p->me->no,
               p->dest->no);
 
   p->messages_received++;
   p->bytes_received += TEST_MESSAGE_SIZE;
   p->me->total_messages_received++;
   p->me->total_bytes_received += TEST_MESSAGE_SIZE;
   p->total_app_rtt += GNUNET_TIME_absolute_get_difference(p->last_message_sent,
       GNUNET_TIME_absolute_get()).rel_value_us;
 
   /* Schedule next send event */
   if (NULL == p->tg)
     return;
 
   left = GNUNET_TIME_absolute_get_remaining(p->tg->next_ping_transmission);
   if (UINT32_MAX == p->tg->base_rate)
   {
     p->tg->send_task = GNUNET_SCHEDULER_add_now (&comm_schedule_send, p);
   }
   else if (0 == left.rel_value_us)
   {
     p->tg->send_task = GNUNET_SCHEDULER_add_now (&comm_schedule_send, p);
   }
   else
   {
     /* Enforce minimum transmission rate 1 msg / sec */
     if (GNUNET_TIME_UNIT_SECONDS.rel_value_us == (left = GNUNET_TIME_relative_min (left, GNUNET_TIME_UNIT_SECONDS)).rel_value_us)
       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
           "Enforcing minimum send rate between master [%u] and slave [%u]\n",
           p->me->no, p->dest->no);
     p->tg->send_task = GNUNET_SCHEDULER_add_delayed (left,
         &comm_schedule_send, p);
   }
 }

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◆ GNUNET_ATS_TEST_generate_traffic_start()

struct TrafficGenerator* GNUNET_ATS_TEST_generate_traffic_start	(	struct BenchmarkPeer *	src,
		struct BenchmarkPartner *	dest,
		enum GeneratorType	type,
		unsigned int	base_rate,
		unsigned int	max_rate,
		struct GNUNET_TIME_Relative	period,
		struct GNUNET_TIME_Relative	duration
	)

Generate between the source master and the partner and send traffic with a maximum rate.

Parameters

src	traffic source
dest	traffic partner
type	type of traffic to generate
base_rate	traffic base rate to send data with
max_rate	traffic maximum rate to send data with
period	duration of a period of traffic generation (~ 1/frequency)
duration	how long to generate traffic

Returns: the traffic generator

Definition at line 253 of file ats-testing-traffic.c.

References TrafficGenerator::base_rate, comm_schedule_send(), TrafficGenerator::dest, BenchmarkPartner::dest, TrafficGenerator::duration_period, GNUNET_ATS_TEST_TG_CONSTANT, GNUNET_ATS_TEST_TG_LINEAR, GNUNET_ATS_TEST_TG_RANDOM, GNUNET_ATS_TEST_TG_SINUS, GNUNET_break, GNUNET_CONTAINER_DLL_insert, GNUNET_ERROR_TYPE_INFO, GNUNET_i2s(), GNUNET_log, GNUNET_new, GNUNET_SCHEDULER_add_now(), GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_FOREVER_ABS, BenchmarkPeer::id, TrafficGenerator::max_rate, BenchmarkPartner::me, TrafficGenerator::next_ping_transmission, BenchmarkPeer::no, TrafficGenerator::send_task, TrafficGenerator::src, BenchmarkPartner::tg, TrafficGenerator::time_start, type, and TrafficGenerator::type.

Referenced by enforce_start_send(), and topology_setup_done().

 {
   struct TrafficGenerator *tg;
 
   if (NULL != dest->tg)
   {
     GNUNET_break (0);
     return NULL;
   }
 
   tg = GNUNET_new (struct TrafficGenerator);
   GNUNET_CONTAINER_DLL_insert (tg_head,
                                tg_tail,
                                tg);
   tg->type = type;
   tg->src = src;
   tg->dest = dest;
   tg->base_rate = base_rate;
   tg->max_rate = max_rate;
   tg->duration_period = period;
   tg->time_start = GNUNET_TIME_absolute_get();
   tg->next_ping_transmission = GNUNET_TIME_UNIT_FOREVER_ABS;
 
   switch (type) {
   case GNUNET_ATS_TEST_TG_CONSTANT:
     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                 "Setting up constant traffic generator master[%u] `%s' and slave [%u] `%s' max %u Bips\n",
                 dest->me->no,
                 GNUNET_i2s (&dest->me->id),
                 dest->dest->no,
                 GNUNET_i2s (&dest->dest->id),
                 base_rate);
     break;
   case GNUNET_ATS_TEST_TG_LINEAR:
     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                 "Setting up linear traffic generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bips\n",
                 dest->me->no,
                 GNUNET_i2s (&dest->me->id),
                 dest->dest->no,
                 GNUNET_i2s (&dest->dest->id),
                 base_rate,
                 max_rate);
     break;
   case GNUNET_ATS_TEST_TG_SINUS:
     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                 "Setting up sinus traffic generator master[%u] `%s' and slave [%u] `%s' baserate %u Bips, amplitude %u Bps\n",
                 dest->me->no,
                 GNUNET_i2s (&dest->me->id),
                 dest->dest->no,
                 GNUNET_i2s (&dest->dest->id),
                 base_rate,
                 max_rate);
     break;
   case GNUNET_ATS_TEST_TG_RANDOM:
     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                 "Setting up random traffic generator master[%u] `%s' and slave [%u] `%s' min %u Bips max %u Bps\n",
                 dest->me->no,
                 GNUNET_i2s (&dest->me->id),
                 dest->dest->no,
                 GNUNET_i2s (&dest->dest->id),
                 base_rate,
                 max_rate);
       break;
     default:
       break;
   }
 
   dest->tg = tg;
   tg->send_task
     = GNUNET_SCHEDULER_add_now (&comm_schedule_send,
                                 dest);
   return tg;
 }

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◆ GNUNET_ATS_TEST_generate_traffic_stop()

void GNUNET_ATS_TEST_generate_traffic_stop ( struct TrafficGenerator * tg )

Definition at line 335 of file ats-testing-traffic.c.

References TrafficGenerator::dest, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_SCHEDULER_cancel(), TrafficGenerator::send_task, and BenchmarkPartner::tg.

Referenced by enforce_start_send(), enforce_stop_send(), and GNUNET_ATS_TEST_generate_traffic_stop_all().

 {
   GNUNET_CONTAINER_DLL_remove (tg_head,
                                tg_tail,
                                tg);
   tg->dest->tg = NULL;
   if (NULL != tg->send_task)
   {
     GNUNET_SCHEDULER_cancel (tg->send_task);
     tg->send_task = NULL;
   }
   GNUNET_free (tg);
 }

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◆ GNUNET_ATS_TEST_generate_traffic_stop_all()

void GNUNET_ATS_TEST_generate_traffic_stop_all ( void )

Stop all traffic generators.

Definition at line 354 of file ats-testing-traffic.c.

References GNUNET_ATS_TEST_generate_traffic_stop(), TrafficGenerator::next, and tg_head.

Referenced by do_shutdown(), and experiment_done_cb().

 {
   struct TrafficGenerator *cur;
   struct TrafficGenerator *next;
 
   next = tg_head;
   for (cur = next; NULL != cur; cur = next)
   {
     next = cur->next;
     GNUNET_ATS_TEST_generate_traffic_stop(cur);
   }
 }