VTuneProfilerService.cxx

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
// Gaudi/Athena include(s):
#include "AthenaKernel/errorcheck.h"
 
// Local include(s):
#include "VTuneProfilerService.h"
 
//
// Convenience variable(s):
//
static const std::string BEGINEVENT_INCIDENT_NAME = "BeginEvent";
static const std::string ENDEVENT_INCIDENT_NAME   = "EndEvent";
static const std::string ENDEVTLOOP_INCIDENT_NAME = "EndEvtLoop";
 
VTuneProfilerService::VTuneProfilerService( const std::string& name, ISvcLocator* svcloc )
  : base_class( name, svcloc ),
    m_incidentSvc( "IncidentSvc", name ),
     m_processedEvents( 0 )  {
 
      declareProperty( "ResumeEvent", m_resumeEvent = 0,
                       "Event in which to resume the profiling." );
      declareProperty( "PauseEvent", m_pauseEvent = -1,
                       "Event in which to pause the profiling. Negative number "
                       "profiles the entire event-loop." );
      declareProperty( "ProfiledAlgs", m_algs,
                       "List of profiled algorithms." );
 
}
 
StatusCode VTuneProfilerService::initialize() {
 
  // Print information
  ATH_MSG_INFO( "Initializing VTuneProfilerService" );
 
  // Use the auditor if a list of algorithms is provided
  if(!m_algs.empty()) {
 
    // Resume/Pause event don't work in conjuction w/ a list of algorithms
    ATH_MSG_INFO("ResumeEvent/PauseEvent don't work in conjuction with ProfiledAlgs. " <<
                 "Execute methods of all provided algorithms will be sampled in all events." );
 
    // Create the auditor
    ATH_CHECK( auditorSvc()->addAuditor("VTuneAuditor") );
  }
 
  // Set up listening to the incidents
  CHECK( m_incidentSvc.retrieve() );
  m_incidentSvc->addListener( this, BEGINEVENT_INCIDENT_NAME );
  m_incidentSvc->addListener( this, ENDEVENT_INCIDENT_NAME   );
  m_incidentSvc->addListener( this, ENDEVTLOOP_INCIDENT_NAME );
 
  // Reset the event counter:
  m_processedEvents = 0;
 
  return StatusCode::SUCCESS;
 
}
 
StatusCode VTuneProfilerService::resumeProfiling() {
 
  // Check whether the profiling is already running:
  if( m_runner ) {
    ATH_MSG_INFO( "VTune profiling already running!" );
    return StatusCode::SUCCESS;
  }
 
  // Print information
  ATH_MSG_INFO( "Starting VTune profiling." );
 
  // Resume VTune
  m_runner = std::make_unique< VTuneProfileRunner >();
 
  return StatusCode::SUCCESS;
 
}
 
StatusCode VTuneProfilerService::pauseProfiling() {
 
  // Check whether the profiling is already running:
  if( !m_runner ) {
    ATH_MSG_INFO( "VTune profiling is not running!" );
    return StatusCode::SUCCESS;
  }
 
  // Print information
  ATH_MSG_INFO( "Stopping VTune profiling." );
 
  // Pause VTune
  m_runner.reset();
 
  return StatusCode::SUCCESS;
 
}
 
bool VTuneProfilerService::isProfilingRunning() const {
 
  return (m_runner!=nullptr);
 
}
 
void VTuneProfilerService::handle( const Incident& inc ) {
 
  // Use incidents only if there is no auditor
  // Next step is to get rid of the incidents altogether
  if ( !m_algs.empty() ) return;
 
  //
  // Pause the profiling after the last event
  //
  if( inc.type() == ENDEVTLOOP_INCIDENT_NAME ) {
    if( m_runner ) {
      if( pauseProfiling().isFailure() ) {
        REPORT_MESSAGE( MSG::ERROR )
           << "Could not pause the profiling";
      }
    }
    return;
  }
 
  //
  // Resume/Pause the profiling on the right event
  //
  if( inc.type() == BEGINEVENT_INCIDENT_NAME ) {
     if( m_resumeEvent == m_processedEvents &&
         !m_runner ) {
        std::lock_guard<std::mutex> lock(m_mutex);
        //double checked locking pattern 
        //https://www.aristeia.com/Papers/DDJ_Jul_Aug_2004_revised.pdf
        //cppcheck-suppress identicalInnerCondition
        if (!m_runner) {
        if( resumeProfiling().isFailure() ) {
           REPORT_MESSAGE( MSG::ERROR )
              << "Could not resume the profiling";
        }
        }
     }
     ++m_processedEvents;
     return;
  }
  else if( inc.type() == ENDEVENT_INCIDENT_NAME ) {
     if( m_pauseEvent == m_processedEvents && m_runner) {
        std::lock_guard<std::mutex> lock(m_mutex);
        //double checked locking pattern 
        //https://www.aristeia.com/Papers/DDJ_Jul_Aug_2004_revised.pdf
        //cppcheck-suppress identicalInnerCondition
        if (m_runner) {
        if( pauseProfiling().isFailure() &&
            m_runner ) {
           REPORT_MESSAGE( MSG::ERROR )
              << "Could not pause the profiling";
        }
        }
     }
     return;
  }
 
  // Complain if we received an incident that we didn't expect:
  ATH_MSG_WARNING( "Wrong incident type received: " << inc.type() );
  return;
 
}