Code cleanup; made encounter optimization explicit; added optimization for adaptive off-time, but it currently seems to work bad with broadcasts
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adamdunkels
parent
9fff85757d
commit
0adceb63b4
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: lpp.c,v 1.20 2009/04/07 11:29:08 nvt-se Exp $
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* $Id: lpp.c,v 1.21 2009/05/06 15:06:38 adamdunkels Exp $
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*/
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/**
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@ -73,9 +73,47 @@
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#define PRINTF(...)
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#endif
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#define WITH_ACK_OPTIMIZATION 1
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#define WITH_PROBE_AFTER_RECEPTION 1
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#define WITH_PROBE_AFTER_TRANSMISSION 1
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#define WITH_ACK_OPTIMIZATION 0
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#define WITH_PROBE_AFTER_RECEPTION 0
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#define WITH_PROBE_AFTER_TRANSMISSION 0
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#define WITH_ENCOUNTER_OPTIMIZATION 1
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#define WITH_ADAPTIVE_OFF_TIME 0
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#ifdef LPP_CONF_LISTEN_TIME
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#define LISTEN_TIME LPP_CONF_LISTEN_TIME
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#else
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#define LISTEN_TIME (CLOCK_SECOND / 128)
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#endif /** LP_CONF_LISTEN_TIME */
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#ifdef LPP_CONF_OFF_TIME
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#define OFF_TIME LPP_CONF_OFF_TIME
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#else
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#define OFF_TIME (CLOCK_SECOND / 2)
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#endif /* LPP_CONF_OFF_TIME */
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#define PACKET_LIFETIME (LISTEN_TIME + OFF_TIME)
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#define UNICAST_TIMEOUT (4 * PACKET_LIFETIME)
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#define PROBE_AFTER_TRANSMISSION_TIME (LISTEN_TIME * 2)
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#define LOWEST_OFF_TIME (CLOCK_SECOND / 8)
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#define ENCOUNTER_LIFETIME (16 * OFF_TIME)
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#ifdef QUEUEBUF_CONF_NUM
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#define MAX_QUEUED_PACKETS QUEUEBUF_CONF_NUM / 2
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#else /* QUEUEBUF_CONF_NUM */
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#define MAX_QUEUED_PACKETS 4
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#endif /* QUEUEBUF_CONF_NUM */
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/* If CLOCK_SECOND is less than 4, we may end up with an OFF_TIME that
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is 0 which will make compilation fail due to a modulo operation in
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the code. To ensure that OFF_TIME is greater than zero, we use the
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construct below. */
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#if OFF_TIME == 0
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#undef OFF_TIME
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#define OFF_TIME 1
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#endif
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struct announcement_data {
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uint16_t id;
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@ -107,33 +145,7 @@ static struct ctimer timer;
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static uint8_t is_listening = 0;
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static clock_time_t off_time_adjustment = 0;
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#ifdef LPP_CONF_LISTEN_TIME
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#define LISTEN_TIME LPP_CONF_LISTEN_TIME
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#else
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#define LISTEN_TIME (CLOCK_SECOND / 64)
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#endif /** LP_CONF_LISTEN_TIME */
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#ifdef LPP_CONF_OFF_TIME
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#define OFF_TIME LPP_CONF_OFF_TIME
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#else
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#define OFF_TIME (CLOCK_SECOND / 4)
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#endif /* LPP_CONF_OFF_TIME */
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/* If CLOCK_SECOND is less than 4, we may end up with an OFF_TIME that
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is 0 which will make compilation fail due to a modulo operation in
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the code. To ensure that OFF_TIME is greater than zero, we use the
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construct below. */
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#if OFF_TIME == 0
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#undef OFF_TIME
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#define OFF_TIME 1
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#endif
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#define PACKET_LIFETIME (LISTEN_TIME + OFF_TIME)
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#define UNICAST_TIMEOUT (2 * PACKET_LIFETIME)
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#define PROBE_AFTER_TRANSMISSION_TIME (LISTEN_TIME * 2)
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#define ENCOUNTER_LIFETIME (16 * OFF_TIME)
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static clock_time_t off_time = OFF_TIME;
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struct queue_list_item {
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struct queue_list_item *next;
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@ -142,11 +154,6 @@ struct queue_list_item {
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struct compower_activity compower;
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};
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#ifdef QUEUEBUF_CONF_NUM
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#define MAX_QUEUED_PACKETS QUEUEBUF_CONF_NUM / 2
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#else /* QUEUEBUF_CONF_NUM */
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#define MAX_QUEUED_PACKETS 4
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#endif /* QUEUEBUF_CONF_NUM */
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LIST(pending_packets_list);
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LIST(queued_packets_list);
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@ -168,14 +175,14 @@ static void
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turn_radio_on(void)
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{
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radio->on();
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leds_on(LEDS_YELLOW);
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/* leds_on(LEDS_YELLOW);*/
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}
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/*---------------------------------------------------------------------------*/
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static void
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turn_radio_off(void)
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{
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radio->off();
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leds_off(LEDS_YELLOW);
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/* leds_off(LEDS_YELLOW);*/
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}
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/*---------------------------------------------------------------------------*/
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static void
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@ -250,6 +257,7 @@ turn_radio_on_for_neighbor(rimeaddr_t *neighbor, struct queue_list_item *i)
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return;
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}
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#if WITH_ENCOUNTER_OPTIMIZATION
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/* We go through the list of encounters to find if we have recorded
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an encounter with this particular neighbor. If so, we can compute
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the time for the next expected encounter and setup a ctimer to
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@ -285,6 +293,8 @@ turn_radio_on_for_neighbor(rimeaddr_t *neighbor, struct queue_list_item *i)
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return;
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}
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}
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#endif /* WITH_ENCOUNTER_OPTIMIZATION */
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/* We did not find the neighbor in the list of recent encounters, so
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we just turn on the radio. */
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/* printf("Neighbor %d.%d not found in recent encounters\n",
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@ -299,6 +309,10 @@ remove_queued_packet(void *item)
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{
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struct queue_list_item *i = item;
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PRINTF("%d.%d: removing queued packet\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
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ctimer_stop(&i->timer);
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queuebuf_free(i->packet);
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list_remove(pending_packets_list, i);
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@ -401,17 +415,24 @@ dutycycle(void *ptr)
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if(is_listening == 0) {
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turn_radio_off();
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compower_accumulate(&compower_idle_activity);
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ctimer_set(t, OFF_TIME + off_time_adjustment, (void (*)(void *))dutycycle, t);
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ctimer_set(t, off_time + off_time_adjustment, (void (*)(void *))dutycycle, t);
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off_time_adjustment = 0;
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PT_YIELD(&dutycycle_pt);
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#if WITH_ADAPTIVE_OFF_TIME
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off_time += LOWEST_OFF_TIME;
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if(off_time > OFF_TIME) {
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off_time = OFF_TIME;
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}
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#endif /* WITH_ADAPTIVE_OFF_TIME */
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} else {
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is_listening--;
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ctimer_set(t, OFF_TIME, (void (*)(void *))dutycycle, t);
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PT_YIELD(&dutycycle_pt);
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}
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} else {
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ctimer_set(t, OFF_TIME, (void (*)(void *))dutycycle, t);
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ctimer_set(t, off_time, (void (*)(void *))dutycycle, t);
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PT_YIELD(&dutycycle_pt);
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}
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}
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@ -465,6 +486,12 @@ send_packet(void)
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return 1;
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}
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#endif /* WITH_ACK_OPTIMIZATION */
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#if WITH_ADAPTIVE_OFF_TIME
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off_time = LOWEST_OFF_TIME;
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restart_dutycycle(off_time);
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#endif /* WITH_ADAPTIVE_OFF_TIME */
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{
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struct queue_list_item *i;
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i = memb_alloc(&queued_packets_memb);
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@ -570,7 +597,8 @@ read_packet(void)
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}
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#if WITH_ACK_OPTIMIZATION
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if(packetbuf_attr(PACKETBUF_ATTR_RELIABLE)) {
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if(packetbuf_attr(PACKETBUF_ATTR_RELIABLE) ||
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packetbuf_attr(PACKETBUF_ATTR_ERELIABLE)) {
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/* We're sending a packet that needs an ACK, so we keep
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the radio on in anticipation of the ACK. */
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turn_radio_on();
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@ -612,6 +640,12 @@ read_packet(void)
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}
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}
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#endif /* WITH_PROBE_AFTER_RECEPTION */
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#if WITH_ADAPTIVE_OFF_TIME
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off_time = LOWEST_OFF_TIME;
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restart_dutycycle(off_time);
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#endif /* WITH_ADAPTIVE_OFF_TIME */
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}
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len = packetbuf_datalen();
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