DataHandlingModel.hxx

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// Declarations for DataHandlingModel
 
#include <folly/coro/BlockingWait.h>
#include <folly/coro/Timeout.h>
 
#include <typeinfo>
 
namespace dunedaq {
namespace datahandlinglibs {
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::init(const appmodel::DataHandlerModule* mcfg)
{
  // Setup request queues
  //setup_request_queues(mcfg);
  try {
    for (auto input : mcfg->get_inputs()) {
      if (input->get_data_type() == "DataRequest") {
        m_data_request_receiver = get_iom_receiver<dfmessages::DataRequest>(input->UID()) ;
      }
      else {
        m_raw_data_receiver_connection_name = input->UID();
        // Parse for prefix
        std::string conn_name = input->UID(); 
        const char delim = '_';
        std::vector<std::string> words;
        std::size_t start;
        std::size_t end = 0;
        while ((start = conn_name.find_first_not_of(delim, end)) != std::string::npos) {
          end = conn_name.find(delim, start);
          words.push_back(conn_name.substr(start, end - start));
        }
 
    TLOG_DEBUG(TLVL_WORK_STEPS) << "Initialize connection based on uid: " 
          << m_raw_data_receiver_connection_name << " front word: " << words.front();
 
    std::string cb_prefix("cb");
        if (words.front() == cb_prefix) {
          m_callback_mode = true;
        }
 
        if (!m_callback_mode) {
          m_raw_data_receiver = get_iom_receiver<IDT>(m_raw_data_receiver_connection_name);
          m_raw_receiver_timeout_ms = std::chrono::milliseconds(input->get_recv_timeout_ms());
        }
      }
    }
    for (auto output : mcfg->get_outputs()) {
      if (output->get_data_type() == "TimeSync") {
        m_generate_timesync = true;
        m_timesync_sender = get_iom_sender<dfmessages::TimeSync>(output->UID()) ;
        m_timesync_connection_name = output->UID();
        break;
      }
    }
  } catch (const ers::Issue& excpt) {
    throw ResourceQueueError(ERS_HERE, "raw_input or frag_output", "DataHandlingModel", excpt);
  }
 
  // Raw input connection sensibility check
  if (!m_callback_mode && m_raw_data_receiver == nullptr) {
    ers::error(ConfigurationError(ERS_HERE, m_sourceid, "Non callback mode, and receiver is unset!"));
  }
 
  // Instantiate functionalities
  m_error_registry.reset(new FrameErrorRegistry());
  m_error_registry->set_ers_metadata("DLH of SourceID[" + std::to_string(mcfg->get_source_id()) + "] ");
  m_latency_buffer_impl.reset(new LBT());
  m_raw_processor_impl.reset(new RPT(m_error_registry, mcfg->get_post_processing_enabled()));
  m_request_handler_impl.reset(new RHT(m_latency_buffer_impl, m_error_registry));
 
  register_node(mcfg->get_module_configuration()->get_latency_buffer()->UID(), m_latency_buffer_impl);
  register_node(mcfg->get_module_configuration()->get_data_processor()->UID(), m_raw_processor_impl);
  register_node(mcfg->get_module_configuration()->get_request_handler()->UID(), m_request_handler_impl);
 
  //m_request_handler_impl->init(args);
  //m_raw_processor_impl->init(args);
  m_request_handler_supports_cutoff_timestamp = m_request_handler_impl->supports_cutoff_timestamp();
  m_fake_trigger = false;
  m_raw_receiver_sleep_us = std::chrono::microseconds::zero();
  m_sourceid.id = mcfg->get_source_id();
  m_sourceid.subsystem = RDT::subsystem;
  m_processing_delay_ticks = mcfg->get_module_configuration()->get_post_processing_delay_ticks();
  m_post_processing_delay_min_wait = mcfg->get_module_configuration()->get_post_processing_delay_min_wait();
  m_post_processing_delay_max_wait = mcfg->get_module_configuration()->get_post_processing_delay_max_wait();
  
 
  // Configure implementations:
  m_raw_processor_impl->conf(mcfg);
  // Configure the latency buffer before the request handler so the request handler can check for alignment
  // restrictions
  try {
    m_latency_buffer_impl->conf(mcfg->get_module_configuration()->get_latency_buffer());
  } catch (const std::bad_alloc& be) {
    ers::error(ConfigurationError(ERS_HERE, m_sourceid, "Latency Buffer can't be allocated with size!"));
  }
  m_request_handler_impl->conf(mcfg);
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::conf(const nlohmann::json& /*args*/)
{
  // Register callbacks if operating in that mode.
  if (m_callback_mode) {
    // Configure and register consume callback
    m_consume_callback = std::bind(&DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::consume_callback, this, std::placeholders::_1);
 
    // Register callback
    auto dmcbr = DataMoveCallbackRegistry::get();
    dmcbr->register_callback<IDT>(m_raw_data_receiver_connection_name, m_consume_callback);
  }
 
  // Configure threads:
  m_consumer_thread.set_name("consumer", m_sourceid.id);
  if (m_generate_timesync) {
    m_timesync_thread.set_name("timesync", m_sourceid.id);
  }
  if (m_processing_delay_ticks) {
    m_postprocess_scheduler_thread.set_name("pprocsched", m_sourceid.id);
    m_timekeeper = std::make_unique<folly::ThreadWheelTimekeeper>();
  }  
}
 
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::start(const nlohmann::json& args)
{
  // Reset opmon variables
  m_sum_payloads = 0;
  m_num_payloads = 0;
  m_sum_requests = 0;
  m_num_requests = 0;
  m_num_lb_insert_failures = 0;
  m_stats_packet_count = 0;
  m_rawq_timeout_count = 0;
  m_num_post_processing_delay_max_waits = 0;
 
  m_t0 = std::chrono::high_resolution_clock::now();
 
  m_run_number = args.value<dunedaq::daqdataformats::run_number_t>("run", 1);
 
  TLOG_DEBUG(TLVL_WORK_STEPS) << "Starting threads...";
  m_raw_processor_impl->start(args);
  m_request_handler_impl->start(args);
  if (!m_callback_mode) {
    m_consumer_thread.set_work(&DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::run_consume, this);
  }
  if (m_generate_timesync) {
    m_timesync_thread.set_work(&DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::run_timesync, this);
  }
  if (m_processing_delay_ticks) {
    m_postprocess_scheduler_thread.set_work(&DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::run_postprocess_scheduler, this);
  }  
  // Register callback to receive and dispatch data requests
  m_data_request_receiver->add_callback(
    std::bind(&DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::dispatch_requests, this, std::placeholders::_1));
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::stop(const nlohmann::json& args)
{
  TLOG_DEBUG(TLVL_WORK_STEPS) << "Stoppping threads...";
 
  // Stop receiving data requests as first thing
  m_data_request_receiver->remove_callback();
  // Stop the other threads
  m_request_handler_impl->stop(args);
  if (m_generate_timesync) {
    while (!m_timesync_thread.get_readiness()) {
      std::this_thread::sleep_for(std::chrono::milliseconds(10));
    }
  }
  if (!m_callback_mode) {
    while (!m_consumer_thread.get_readiness()) {
      std::this_thread::sleep_for(std::chrono::milliseconds(10));
    }
  }
  if (m_processing_delay_ticks) {
    m_baton.post(); // In case the coroutine is still waiting when the consumer has stopped
    while (!m_postprocess_scheduler_thread.get_readiness()) {
      std::this_thread::sleep_for(std::chrono::milliseconds(10));
    }  
  }  
  TLOG_DEBUG(TLVL_WORK_STEPS) << "Flushing latency buffer with occupancy: " << m_latency_buffer_impl->occupancy();
  m_latency_buffer_impl->flush();
  m_raw_processor_impl->stop(args);
  m_raw_processor_impl->reset_last_daq_time();
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::generate_opmon_data()
 {
   opmon::DataHandlerInfo ri;
   ri.set_sum_payloads(m_sum_payloads.load());
   ri.set_num_payloads(m_num_payloads.exchange(0));
 
   ri.set_num_data_input_timeouts(m_rawq_timeout_count.exchange(0));
 
   auto now = std::chrono::high_resolution_clock::now();
   int new_packets = m_stats_packet_count.exchange(0);
   double seconds = std::chrono::duration_cast<std::chrono::microseconds>(now - m_t0).count() / 1000000.;
   m_t0 = now;
 
   // 08-May-2025, KAB: added a message to warn users when latency buffer inserts are failing.
   int local_num_lb_insert_failures = m_num_lb_insert_failures.exchange(0);
   if (local_num_lb_insert_failures != 0) {
     ers::warning(NonZeroLatencyBufferInsertFailures(ERS_HERE, local_num_lb_insert_failures, ri.num_payloads()));
   }
 
   ri.set_rate_payloads_consumed(new_packets / seconds / 1000.);
   ri.set_num_lb_insert_failures(local_num_lb_insert_failures);
   ri.set_sum_requests(m_sum_requests.load());
   ri.set_num_requests(m_num_requests.exchange(0));
   ri.set_num_post_processing_delay_max_waits(m_num_post_processing_delay_max_waits.exchange(0));
   ri.set_last_daq_timestamp(m_raw_processor_impl->get_last_daq_time());
 
   this->publish(std::move(ri));
 }
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::transform_and_process(IDT&& payload) {
  if constexpr (std::is_same_v<IDT, RDT>) {
    process_item(std::move(payload));
  } else {
    auto transformed = transform_payload(payload);
    for (auto& i : transformed) {
      process_item(std::move(i));
    }   
  }  
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::consume_callback(IDT&& payload) {
  transform_and_process(std::move(payload));
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::process_item(RDT&& payload)
{
  m_raw_processor_impl->preprocess_item(&payload);
  if (m_request_handler_supports_cutoff_timestamp) {
    int64_t diff1 = payload.get_timestamp() - m_request_handler_impl->get_cutoff_timestamp();
    if (diff1 <= 0) {
      //m_request_handler_impl->increment_tardy_tp_count();
      ers::warning(DataPacketArrivedTooLate(ERS_HERE, m_run_number, payload.get_timestamp(),
                                            m_request_handler_impl->get_cutoff_timestamp(), diff1,
                                            (static_cast<double>(diff1)/62500.0)));
    }
  }
  if (!m_latency_buffer_impl->write(std::move(payload))) {
    //TLOG_DEBUG(TLVL_TAKE_NOTE) << "***ERROR: Latency buffer insert failed! (Payload timestamp=" << payload.get_timestamp() << ")";
    m_num_lb_insert_failures++;
  }
  if (m_processing_delay_ticks == 0) {
    m_raw_processor_impl->postprocess_item(m_latency_buffer_impl->back());
    ++m_num_payloads;
    ++m_sum_payloads;
    ++m_stats_packet_count;
  } else {
    m_baton.post();
  }
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::run_postprocess_scheduler()
{
  folly::coro::blockingWait(postprocess_schedule());
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::run_consume()
{
 
  TLOG_DEBUG(TLVL_WORK_STEPS) << "Consumer thread started...";
  m_rawq_timeout_count = 0;
  m_num_payloads = 0;
  m_sum_payloads = 0;
  m_stats_packet_count = 0;
  m_num_post_processing_delay_max_waits = 0;
 
  while (m_run_marker.load()) {
    // Try to acquire data
 
    auto opt_payload = m_raw_data_receiver->try_receive(m_raw_receiver_timeout_ms);
 
    if (opt_payload) {
      IDT& payload = opt_payload.value();
      transform_and_process(std::move(payload));
    } else {
      ++m_rawq_timeout_count;
      // Protection against a zero sleep becoming a yield
      if ( m_raw_receiver_sleep_us != std::chrono::microseconds::zero())
        std::this_thread::sleep_for(m_raw_receiver_sleep_us);
    }
  }
  TLOG_DEBUG(TLVL_WORK_STEPS) << "Consumer thread joins... ";
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
folly::coro::Task<void>
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::postprocess_schedule() {  
 
  TLOG_DEBUG(TLVL_WORK_STEPS) << "Postprocess schedule coroutine started...";
  timestamp_t newest_ts = 0;
  timestamp_t end_win_ts = 0;
  bool first_cycle = true;
  auto last_post_proc_time = std::chrono::system_clock::now();
  auto now = last_post_proc_time;
  std::chrono::milliseconds milliseconds;
  RDT processed_element;
 
  // Deferral of the post processing, to allow elements being reordered in the LB
  // Basically, find data older than a certain timestamp and process all data since the last post-processed element up to that value  
  while (m_run_marker.load()) {
    try {
      co_await folly::coro::timeout(
        m_baton.operator co_await(),
        std::chrono::milliseconds{m_post_processing_delay_max_wait},
        m_timekeeper.get());
      m_baton.reset();
    } catch (const folly::FutureTimeout&) {
      ++m_num_post_processing_delay_max_waits;
    }
 
    if (m_latency_buffer_impl->occupancy() == 0) {
      continue;
    }
 
    now = std::chrono::system_clock::now();
    milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(now - last_post_proc_time);
 
    if (milliseconds.count() <= m_post_processing_delay_min_wait) {
      continue;
    }
 
    last_post_proc_time = now;
 
    // Get the LB boundaries
    auto tail = m_latency_buffer_impl->back();
    newest_ts = tail->get_timestamp();
 
    if (first_cycle) {
      auto head = m_latency_buffer_impl->front();
      processed_element.set_timestamp(head->get_timestamp());
      first_cycle = false;
      TLOG() << "***** First pass post processing *****";
    }
 
    if (newest_ts - processed_element.get_timestamp() > m_processing_delay_ticks) {
      end_win_ts = newest_ts - m_processing_delay_ticks;
      auto start_iter = m_latency_buffer_impl->lower_bound(processed_element, false);
      processed_element.set_timestamp(end_win_ts);
      auto end_iter = m_latency_buffer_impl->lower_bound(processed_element, false);
 
      for (auto it = start_iter; it != end_iter; ++it) {
        m_raw_processor_impl->postprocess_item(&(*it));
        ++m_num_payloads;
        ++m_sum_payloads;
        ++m_stats_packet_count;
      }
    }
  }
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::run_timesync()
{
  TLOG_DEBUG(TLVL_WORK_STEPS) << "TimeSync thread started...";
  m_num_requests = 0;
  m_sum_requests = 0;
  uint64_t msg_seqno = 0;
  timestamp_t prev_timestamp = 0;
  auto once_per_run = true;
  size_t zero_timestamp_count = 0;
  size_t duplicate_timestamp_count = 0;
  size_t total_timestamp_count = 0;
  while (m_run_marker.load()) {
    try {
      auto timesyncmsg = dfmessages::TimeSync(m_raw_processor_impl->get_last_daq_time());
      ++total_timestamp_count;
      // daq_time is zero for the first received timesync, and may
      // be the same as the previous daq_time if the data has
      // stopped flowing. In both cases we don't send the TimeSync
      if (timesyncmsg.daq_time != 0 && timesyncmsg.daq_time != prev_timestamp) {
        prev_timestamp = timesyncmsg.daq_time;
        timesyncmsg.run_number = m_run_number;
        timesyncmsg.sequence_number = ++msg_seqno;
        timesyncmsg.source_pid = m_pid_of_current_process;
        TLOG_DEBUG(TLVL_TIME_SYNCS) << "New timesync: daq=" << timesyncmsg.daq_time
          << " wall=" << timesyncmsg.system_time << " run=" << timesyncmsg.run_number
          << " seqno=" << timesyncmsg.sequence_number << " pid=" << timesyncmsg.source_pid;
        try {
            dfmessages::TimeSync timesyncmsg_copy(timesyncmsg);
          m_timesync_sender->send(std::move(timesyncmsg_copy), std::chrono::milliseconds(500));
        } catch (ers::Issue& excpt) {
          ers::warning(
            TimeSyncTransmissionFailed(ERS_HERE, m_sourceid, m_timesync_connection_name, excpt));
        }
          
        if (m_fake_trigger) {
          dfmessages::DataRequest dr;
          ++m_current_fake_trigger_id;
          dr.trigger_number = m_current_fake_trigger_id;
          dr.trigger_timestamp = timesyncmsg.daq_time > 500 * us ? timesyncmsg.daq_time - 500 * us : 0;
          auto width = 300000;
          uint offset = 100;
          dr.request_information.window_begin = dr.trigger_timestamp > offset ? dr.trigger_timestamp - offset : 0;
          dr.request_information.window_end = dr.request_information.window_begin + width;
          dr.request_information.component = m_sourceid;
          dr.data_destination = "data_fragments_q";
          TLOG_DEBUG(TLVL_WORK_STEPS) << "Issuing fake trigger based on timesync. "
            << " ts=" << dr.trigger_timestamp 
            << " window_begin=" << dr.request_information.window_begin
            << " window_end=" << dr.request_information.window_end;
          m_request_handler_impl->issue_request(dr);
 
          ++m_num_requests;
          ++m_sum_requests;
        }
      } else {
        if (timesyncmsg.daq_time == 0) {++zero_timestamp_count;}
        if (timesyncmsg.daq_time == prev_timestamp) {++duplicate_timestamp_count;}
        if (once_per_run) {
          TLOG() << "Timesync with DAQ time 0 won't be sent out as it's an invalid sync.";
          once_per_run = false;
        }
      }
    } catch (const iomanager::TimeoutExpired& excpt) {
      // ++m_timesyncqueue_timeout;
    }
    // Split up the 100ms sleep into 10 sleeps of 10ms, so we respond to "stop" quicker
    for (size_t i=0; i<10; ++i) {
      std::this_thread::sleep_for(std::chrono::milliseconds(10));
      if (!m_run_marker.load()) {
        break;
      }
    }
  }
  once_per_run = true;
  TLOG_DEBUG(TLVL_WORK_STEPS) << "TimeSync thread joins... (timestamp count, zero/same/total  = "
                              << zero_timestamp_count << "/" << duplicate_timestamp_count << "/"
                              << total_timestamp_count << ")";
}
 
template<class RDT, class RHT, class LBT, class RPT, class IDT>
void 
DataHandlingModel<RDT, RHT, LBT, RPT, IDT>::dispatch_requests(dfmessages::DataRequest& data_request)
{
  if (data_request.request_information.component != m_sourceid) {
     ers::error(RequestSourceIDMismatch(ERS_HERE, m_sourceid, data_request.request_information.component));
     return;
  }
  TLOG_DEBUG(TLVL_QUEUE_POP) << "Received DataRequest" 
    << " for trig/seq_number " << data_request.trigger_number << "." << data_request.sequence_number
    << ", runno " << data_request.run_number
    << ", trig timestamp " << data_request.trigger_timestamp
    << ", SourceID: " << data_request.request_information.component
    << ", window begin/end " << data_request.request_information.window_begin
    << "/" << data_request.request_information.window_end
    << ", dest: " << data_request.data_destination;
  m_request_handler_impl->issue_request(data_request);
  ++m_num_requests;
  ++m_sum_requests;
}
 
} // namespace datahandlinglibs
} // namespace dunedaq