mirror of https://github.com/ArduPilot/ardupilot
GCS_MAVLink: measure stream slowdown in ms
This costs us a couple of extra bytes of RAM and gains us not doing a whole heap of multiplies
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@ -487,8 +487,8 @@ private:
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uint32_t waypoint_timelast_request; // milliseconds
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uint32_t waypoint_timelast_request; // milliseconds
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const uint16_t waypoint_receive_timeout = 8000; // milliseconds
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const uint16_t waypoint_receive_timeout = 8000; // milliseconds
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// number of extra 20ms intervals to add to slow things down for the radio
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// number of extra ms to add to slow things down for the radio
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uint8_t stream_slowdown;
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uint16_t stream_slowdown_ms;
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// perf counters
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// perf counters
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AP_HAL::Util::perf_counter_t _perf_packet;
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AP_HAL::Util::perf_counter_t _perf_packet;
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@ -696,7 +696,7 @@ private:
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uint32_t max_retry_deferred_body_us;
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uint32_t max_retry_deferred_body_us;
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uint8_t max_retry_deferred_body_type;
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uint8_t max_retry_deferred_body_type;
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} try_send_message_stats;
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} try_send_message_stats;
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uint8_t max_slowdown;
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uint16_t max_slowdown_ms;
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#endif
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#endif
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};
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};
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@ -706,23 +706,23 @@ void GCS_MAVLINK::handle_radio_status(mavlink_message_t *msg, AP_Logger &datafla
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// use the state of the transmit buffer in the radio to
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// use the state of the transmit buffer in the radio to
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// control the stream rate, giving us adaptive software
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// control the stream rate, giving us adaptive software
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// flow control
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// flow control
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if (packet.txbuf < 20 && stream_slowdown < 100) {
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if (packet.txbuf < 20 && stream_slowdown_ms < 2000) {
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// we are very low on space - slow down a lot
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// we are very low on space - slow down a lot
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stream_slowdown += 3;
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stream_slowdown_ms += 60;
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} else if (packet.txbuf < 50 && stream_slowdown < 100) {
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} else if (packet.txbuf < 50 && stream_slowdown_ms < 2000) {
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// we are a bit low on space, slow down slightly
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// we are a bit low on space, slow down slightly
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stream_slowdown += 1;
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stream_slowdown_ms += 20;
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} else if (packet.txbuf > 95 && stream_slowdown > 10) {
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} else if (packet.txbuf > 95 && stream_slowdown_ms > 200) {
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// the buffer has plenty of space, speed up a lot
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// the buffer has plenty of space, speed up a lot
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stream_slowdown -= 2;
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stream_slowdown_ms -= 40;
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} else if (packet.txbuf > 90 && stream_slowdown != 0) {
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} else if (packet.txbuf > 90 && stream_slowdown_ms != 0) {
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// the buffer has enough space, speed up a bit
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// the buffer has enough space, speed up a bit
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stream_slowdown--;
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stream_slowdown_ms -= 20;
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}
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}
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#if GCS_DEBUG_SEND_MESSAGE_TIMINGS
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#if GCS_DEBUG_SEND_MESSAGE_TIMINGS
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if (stream_slowdown > max_slowdown) {
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if (stream_slowdown_ms > max_slowdown_ms) {
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max_slowdown = stream_slowdown;
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max_slowdown_ms = stream_slowdown_ms;
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}
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}
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#endif
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#endif
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@ -991,10 +991,7 @@ uint16_t GCS_MAVLINK::get_reschedule_interval_ms(const deferred_message_bucket_t
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{
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{
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uint32_t interval_ms = deferred.interval_ms;
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uint32_t interval_ms = deferred.interval_ms;
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// add in adjustments for streamrate-slowdown (e.g. based
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interval_ms += stream_slowdown_ms;
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// on feedback from telemetry radio on its state).
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// slowdown is basically 50ths of a second
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interval_ms += stream_slowdown * 20;
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// slow most messages down if we're transfering parameters or
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// slow most messages down if we're transfering parameters or
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// waypoints:
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// waypoints:
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@ -1530,12 +1527,12 @@ GCS_MAVLINK::update_receive(uint32_t max_time_us)
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try_send_message_stats.no_space_for_message);
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try_send_message_stats.no_space_for_message);
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try_send_message_stats.no_space_for_message = 0;
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try_send_message_stats.no_space_for_message = 0;
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}
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}
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if (max_slowdown) {
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if (max_slowdown_ms) {
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gcs().send_text(MAV_SEVERITY_INFO,
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gcs().send_text(MAV_SEVERITY_INFO,
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"GCS.chan(%u): max slowdown=%u",
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"GCS.chan(%u): max slowdown=%u",
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chan,
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chan,
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max_slowdown);
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max_slowdown_ms);
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max_slowdown = 0;
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max_slowdown_ms = 0;
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}
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}
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if (try_send_message_stats.behind) {
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if (try_send_message_stats.behind) {
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gcs().send_text(MAV_SEVERITY_INFO,
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gcs().send_text(MAV_SEVERITY_INFO,
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@ -1577,7 +1574,7 @@ GCS_MAVLINK::update_receive(uint32_t max_time_us)
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#endif
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#endif
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if (waypoint_receiving) {
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if (waypoint_receiving) {
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const uint32_t wp_recv_time = 1000U + (stream_slowdown*20);
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const uint32_t wp_recv_time = 1000U + stream_slowdown_ms;
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// stop waypoint receiving if timeout
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// stop waypoint receiving if timeout
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if (tnow - waypoint_timelast_receive > wp_recv_time+waypoint_receive_timeout) {
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if (tnow - waypoint_timelast_receive > wp_recv_time+waypoint_receive_timeout) {
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