GlobalLargeRDNNCalibration.cxx

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/*
   Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
// System includes
#include <TEnv.h>
#include <tuple>
#include <cmath>
#include <map>
 
#ifdef XAOD_STANDALONE
#include <AsgMessaging/MessageCheck.h>
#endif
 
#include "JetCalibTools/JetCalibUtils.h"
#include "PathResolver/PathResolver.h"
#include "JetCalibTools/CalibrationMethods/GlobalLargeRDNNCalibration.h"
 
 
namespace{
    // Redefine some functions from the package OnnxRuntimeUtils which is not (yet) available in AnalysisBase
    // Set up the ONNX Runtime session
    std::unique_ptr< Ort::Session > CreateORTSession(const std::string& modelFile){
        Ort::SessionOptions sessionOptions;
        sessionOptions.SetIntraOpNumThreads( 1 );
        sessionOptions.SetGraphOptimizationLevel( ORT_ENABLE_BASIC );
 
        // Set the ONNX service name depending on the actual analysis release 
        std::string serviceName;
        #ifdef XAOD_STANDALONE
            using namespace asg::msgUserCode;
            ANA_MSG_WARNING("If running DNN calibration in AnalysisBase: necessary to instantiate the ONNX service AthONNX::ONNXRuntimeSvc with name AthONNXSvc");
            ATH_MSG_WARNING("Either in C++ config (see exemple in JetCalibTools_Example.cxx)");
            ATH_MSG_WARNING("Or in python config with");
            ATH_MSG_WARNING("   from AnaAlgorithm.DualUseConfig import createService");
            ATH_MSG_WARNING("   onnxSvc = createService('AthOnnx::OnnxRuntimeSvc', 'AthONNXSvc', myAlgSequence)");
            serviceName = "AthONNXSvc";
        #else
            serviceName = "AthOnnx::OnnxRuntimeSvc";
        #endif
 
        ServiceHandle< AthOnnx::IOnnxRuntimeSvc > svc(serviceName, "AthOnnx::OnnxRuntimeSvc");
 
        return std::make_unique<Ort::Session>( svc->env(),
                                                modelFile.c_str(),
                                                sessionOptions );
    }
 
    // Get dimensions and names of the input nodes
    std::tuple<std::vector<int64_t>, std::vector<const char*> > GetInputNodeInfo(const std::unique_ptr< Ort::Session >& session){
        std::vector<int64_t> input_node_dims;
        size_t num_input_nodes = session->GetInputCount();
        std::vector<const char*> input_node_names(num_input_nodes);
        Ort::AllocatorWithDefaultOptions allocator;
        for( std::size_t i = 0; i < num_input_nodes; i++ ) {
            
            char* input_name = session->GetInputNameAllocated(i, allocator).release();
            input_node_names[i] = input_name;
            Ort::TypeInfo type_info = session->GetInputTypeInfo(i);
            auto tensor_info = type_info.GetTensorTypeAndShapeInfo();
        
            input_node_dims = tensor_info.GetShape();
            }
        return std::make_tuple(input_node_dims, input_node_names);
    }
 
    // Get dimensions and names of the output nodes
    std::tuple<std::vector<int64_t>, std::vector<const char*> > GetOutputNodeInfo(const std::unique_ptr< Ort::Session >& session){
        std::vector<int64_t> output_node_dims;
        size_t num_output_nodes = session->GetOutputCount();
        std::vector<const char*> output_node_names(num_output_nodes);
        Ort::AllocatorWithDefaultOptions allocator;
 
        for( std::size_t i = 0; i < num_output_nodes; i++ ) {
            char* output_name = session->GetOutputNameAllocated(i, allocator).release();
            output_node_names[i] = output_name;
 
            Ort::TypeInfo type_info = session->GetOutputTypeInfo(i);
            auto tensor_info = type_info.GetTensorTypeAndShapeInfo();
 
            output_node_dims = tensor_info.GetShape();
        }
        return std::make_tuple(output_node_dims, output_node_names);
    }
}
 
 
struct GlobalLargeRDNNCalibration::VarRetriever{
 
    virtual float value(const  xAOD::Jet& jet, JetEventInfo& jetInfo, double eScale) = 0;
    virtual ~VarRetriever()= default;
};
 
namespace {
 
    struct VarAccessorRetriever : public GlobalLargeRDNNCalibration::VarRetriever {
        VarAccessorRetriever(const std::string &n): m_acc(n) {}
 
        virtual float value(const xAOD::Jet& jet, JetEventInfo&, double eScale) {
            return m_acc(jet) * eScale;
        }
        
        SG::AuxElement::ConstAccessor<float> m_acc;
    };
  
    struct RatioAccessorRetriever : public GlobalLargeRDNNCalibration::VarRetriever {
        RatioAccessorRetriever():   m_accTau1("Tau1_wta"), 
                                    m_accTau2("Tau2_wta"),
                                    m_accTau3("Tau3_wta"),
                                    m_accECF1("ECF1"),
                                    m_accECF2("ECF2"),
                                    m_accECF3("ECF3") {}
 
        virtual float value(const xAOD::Jet& jet, JetEventInfo&, double eScale) = 0;
    
        SG::AuxElement::ConstAccessor<float> m_accTau1;
        SG::AuxElement::ConstAccessor<float> m_accTau2;
        SG::AuxElement::ConstAccessor<float> m_accTau3;
        SG::AuxElement::ConstAccessor<float> m_accECF1;
        SG::AuxElement::ConstAccessor<float> m_accECF2;
        SG::AuxElement::ConstAccessor<float> m_accECF3;
    };
 
    #define DEF_RETRIEVER0(cname, expr )  struct Var_##cname : public GlobalLargeRDNNCalibration::VarRetriever { float value(const xAOD::Jet& jet, JetEventInfo& , double eScale ) { return expr ; } }
    #define DEF_RETRIEVER1(cname, expr )  struct Var_##cname : public GlobalLargeRDNNCalibration::VarRetriever { float value(const xAOD::Jet& , JetEventInfo& jetInfo, double eScale ) { return expr ; } }
    #define DEF_RATIO_RETRIEVER(cname, expr )  struct Ratio_##cname : public RatioAccessorRetriever { float value(const xAOD::Jet& jet, JetEventInfo& , double eScale ) { return expr ; } }
    
    // Std jet variables
    DEF_RETRIEVER0( eta, jet.eta()*eScale ) ;
    DEF_RETRIEVER0( log_e, log(jet.e()*eScale) ) ;
    DEF_RETRIEVER0( log_m, log(jet.m()*eScale) ) ;
    DEF_RETRIEVER0( m, jet.m()*eScale ) ;
 
    // Ratio variables -- default values consistent with DNN training
    DEF_RATIO_RETRIEVER( Tau21_wta, m_accTau1(jet) > 1e-8 ? eScale * m_accTau2(jet) / m_accTau1(jet) : -0.1);
    DEF_RATIO_RETRIEVER( Tau32_wta, m_accTau2(jet) > 1e-8 ? eScale * m_accTau3(jet) / m_accTau2(jet) : -0.1);
    DEF_RATIO_RETRIEVER( C2, m_accECF2(jet) > 1e-8 ? eScale * m_accECF3(jet) * m_accECF1(jet) / pow(m_accECF2(jet), 2.0) : -999);
    DEF_RATIO_RETRIEVER( D2, m_accECF2(jet) > 1e-8 ? eScale * m_accECF3(jet) * pow(m_accECF1(jet), 3.0) / pow(m_accECF2(jet), 3.0) : -999);
    
    // Std pile-up info
    DEF_RETRIEVER1( mu, jetInfo.mu()*eScale );
    DEF_RETRIEVER1( NPV, jetInfo.NPV()*eScale );
 
    #undef DEF_RETRIEVER
 
    GlobalLargeRDNNCalibration::VarRetriever* buildVarRetriever(const std::string & name){
        // create a map of known specialized VarRetriever.
        // it's just a map "name" <-> function returning a Var_xyz()
        static const std::map<std::string, std::function<GlobalLargeRDNNCalibration::VarRetriever*()> > knownVar{
            {"eta",       [](){return new Var_eta();} },
            {"log_e",     [](){return new Var_log_e();} },
            {"log_m",     [](){return new Var_log_m();} },
            {"Tau21_wta", [](){return new Ratio_Tau21_wta();} },
            {"Tau32_wta", [](){return new Ratio_Tau32_wta();} },
            {"C2",        [](){return new Ratio_C2();} },
            {"D2",        [](){return new Ratio_D2();} },
            {"mu",        [](){return new Var_mu();} },
            {"NPV",       [](){return new Var_NPV();} },
        };
 
        auto it = knownVar.find(name);
        //  if name is not a known variable, assume it's a jet attribute, so return a generic VarAccessorRetriever
        if( it == knownVar.end() ) return new VarAccessorRetriever(name);
        // else we just return an instance of a known VarRetriever class
        //  (it->second is  the function : we call it to obtain a new pointer)
        return it->second();
    }
 
}
 
GlobalLargeRDNNCalibration::GlobalLargeRDNNCalibration()
  : JetCalibrationStep::JetCalibrationStep("GlobalLargeRDNNCalibration/GlobalLargeRDNNCalibration"),
    m_config(nullptr), m_calibArea("")
{
}
 
GlobalLargeRDNNCalibration::GlobalLargeRDNNCalibration(const std::string& name)
  : JetCalibrationStep::JetCalibrationStep(name.c_str()),
    m_config(nullptr), m_calibArea("")
{
}
 
GlobalLargeRDNNCalibration::GlobalLargeRDNNCalibration(const std::string& name, TEnv * config, const TString& calibArea, bool /*dev*/)
  : JetCalibrationStep::JetCalibrationStep( name.c_str() ),
    m_config(config), m_calibArea(calibArea)
{
}
 
GlobalLargeRDNNCalibration::~GlobalLargeRDNNCalibration(){
    for(VarRetriever* v: m_varretrievers) delete v;
}
 
// Initialize
StatusCode GlobalLargeRDNNCalibration::initialize(){
    ATH_MSG_DEBUG("Initializing tool");
    if ( !m_config ) { ATH_MSG_FATAL("Config file not specified. Aborting."); return StatusCode::FAILURE; }
 
    // Get list of input features
    m_NNInputs = JetCalibUtils::Vectorize( m_config->GetValue("DNNC.Inputs","") );
    // Now build a VarRetriever for each of the input features 
    m_varretrievers.resize(m_NNInputs.size());
    ATH_MSG_DEBUG("DNN inputs");
    for (long unsigned int i=0;i<m_NNInputs.size();i++) {
        m_varretrievers[i] = buildVarRetriever( m_NNInputs[i].Data() );
        ATH_MSG_DEBUG("  " << m_NNInputs[i]);
    }
 
    // Get normalization constants for input features
    m_eScales = JetCalibUtils::VectorizeD( m_config->GetValue("DNNC.EScales","") );
    m_NormOffsets = JetCalibUtils::VectorizeD( m_config->GetValue("DNNC.NormOffsets","") );
    m_NormScales = JetCalibUtils::VectorizeD( m_config->GetValue("DNNC.NormScales","") );
        
    if (m_eScales.size()!=m_NNInputs.size() || m_NormOffsets.size()!=m_NNInputs.size() || m_NormScales.size()!=m_NNInputs.size()) {
        ATH_MSG_FATAL("Misconfiguration of config file : not same number of offset/scale parameters and number of features. Will exit");
        return StatusCode::FAILURE;
    }
 
    if( msgLvl(MSG::DEBUG) ){
        ATH_MSG_DEBUG("m_NormOffsets size : " << m_NormOffsets.size());
        ATH_MSG_DEBUG("m_NormOffsets");
        for (long unsigned int i=0;i<m_NormOffsets.size();i++) {
        ATH_MSG_DEBUG("  " << m_NormOffsets[i]);
        }
        ATH_MSG_DEBUG("m_NormScales size : " << m_NormScales.size());
        ATH_MSG_DEBUG("m_NormScales");
        for (long unsigned int i=0;i<m_NormScales.size();i++) {
        ATH_MSG_DEBUG("  " << m_NormScales[i]);
        }
    }
    
    // Get DNN config file
    m_modelFileName = m_config->GetValue("DNNC.ONNXInput","");
    std::string modelPath="JetCalibTools/"+m_calibArea+"CalibrationConfigs/"+m_modelFileName;
    const std::string fullModelPath = PathResolverFindCalibFile( modelPath ); // Full path
    ATH_MSG_INFO("Using ONNX model : " << m_modelFileName);
    ATH_MSG_INFO("resolved in: " << fullModelPath);
 
    // Set up the ONNX Runtime session.
    m_session = CreateORTSession(fullModelPath);
    ATH_MSG_DEBUG( "ONNX Runtime session succesfully created" );
 
 
    /************************** Input Nodes *****************************/
    /*********************************************************************/
    std::tuple<std::vector<int64_t>, std::vector<const char*> > inputInfo = GetInputNodeInfo(m_session);
    m_input_node_dims = std::get<0>(inputInfo);
    m_input_node_names = std::get<1>(inputInfo);
 
    if( msgLvl(MSG::DEBUG) ){
        for( std::size_t i = 0; i < m_input_node_names.size(); i++ ) {
            // print input node names
            ATH_MSG_DEBUG("Input "<<i<<" : "<<" name= "<<m_input_node_names[i]);
            
            // print input shapes/dims
            ATH_MSG_DEBUG("Input "<<i<<" : num_dims= "<<m_input_node_dims.size());
            for (std::size_t j = 0; j < m_input_node_dims.size(); j++){
                ATH_MSG_DEBUG("Input "<<i<<" : dim "<<j<<"= "<<m_input_node_dims[j]);
            }
        }
    }
 
    /************************** Output Nodes *****************************/
    /*********************************************************************/
    std::tuple<std::vector<int64_t>, std::vector<const char*> > outputInfo = GetOutputNodeInfo(m_session);
    m_output_node_dims = std::get<0>(outputInfo);
    m_output_node_names = std::get<1>(outputInfo);
 
    if( msgLvl(MSG::DEBUG) ){
        for( std::size_t i = 0; i < m_output_node_names.size(); i++ ) {
            // print input node names
            ATH_MSG_DEBUG("Output "<<i<<" : "<<" name= "<<m_output_node_names[i]);
 
            // print input shapes/dims
            ATH_MSG_DEBUG("Output "<<i<<" : num_dims= "<<m_output_node_dims.size());
            for (std::size_t j = 0; j < m_output_node_dims.size(); j++){
                ATH_MSG_DEBUG("Output "<<i<<" : dim "<<j<<"= "<<m_output_node_dims[j]);
            }
        }
    }
 
    /**************************************************************************************
    * m_input_node_dims[0] = -1; -1 needs to be replaced by the batch size; for no batch --> 1 
    * m_input_node_dims[1] should be equal to m_NNInputs.size()
    ****************************************************************************************/
    m_input_node_dims[0] = 1;
    m_output_node_dims[0] = 1;
 
    if (m_NNInputs.size()!=(long unsigned int)m_input_node_dims[1]) {
        ATH_MSG_FATAL("DNN input features not the same size as in config, will exit");
        return StatusCode::FAILURE;
    }
 
    // Set jet starting scale
    m_jetStartScale = "JetConstitScaleMomentum";
 
    return StatusCode::SUCCESS;
}
 
 
 
StatusCode GlobalLargeRDNNCalibration::calibrate(xAOD::Jet& jet, JetEventInfo& jetEventInfo) const {
 
    // Set jet initial scale
    xAOD::JetFourMom_t jetStartP4;
    ATH_CHECK( setStartP4(jet) );
    jetStartP4 = jet.jetP4();
 
    // Don't apply calibration for jets with negative or null mass or for one constituent jets
    if(jet.m()<=0 || jet.numConstituents()==1){
        jet.setAttribute<xAOD::JetFourMom_t>("JetDNNCScaleMomentum",jetStartP4);
        return StatusCode::SUCCESS;
    }
 
    // Get input features normalized for jet
    std::vector<float> input_tensor_values = getJetFeatures(jet, jetEventInfo);
    if( msgLvl(MSG::DEBUG) ){
        ATH_MSG_DEBUG("Input tensor values : ");
        for (long unsigned int i=0;i<input_tensor_values.size();i++) ATH_MSG_DEBUG(" " << input_tensor_values[i]);
    }
 
    // Check for nan or +/- inf values
    int nNan = std::count_if(input_tensor_values.begin(), input_tensor_values.end(), [](float f){return std::isnan(f) || std::isinf(f);});
    if (nNan>0) {
        ATH_MSG_WARNING("Encountered Nan or inf value in input features, will not apply calibration");
        jet.setAttribute<xAOD::JetFourMom_t>("JetDNNCScaleMomentum",jetStartP4);
        return StatusCode::SUCCESS;
    }
 
    // Convert input_tensor_values array to onnx-compatible tensor
    Ort::MemoryInfo memory_info = Ort::MemoryInfo::CreateCpu(OrtArenaAllocator, OrtMemTypeCPU);
    Ort::Value input_tensor = Ort::Value::CreateTensor<float>(  memory_info, 
                                                                input_tensor_values.data(), 
                                                                input_tensor_values.size(), 
                                                                m_input_node_dims.data(), 
                                                                m_input_node_dims.size());
 
    // Make sure we get the same input values in tensor
    std::vector<float> vec(input_tensor.GetTensorMutableData<float>(), input_tensor.GetTensorMutableData<float>() + m_input_node_dims[1]);
    if (vec!=input_tensor_values) {
        ATH_MSG_WARNING("Input tensor after convertion to Ort tensor is not the same as the input vector, will not apply calibration");
        jet.setAttribute<xAOD::JetFourMom_t>("JetDNNCScaleMomentum",jetStartP4);
        return StatusCode::SUCCESS;
    }
 
    // Run inference on input_tensor
    Ort::Session& session ATLAS_THREAD_SAFE = *m_session;
    auto output_tensor =  session.Run(  Ort::RunOptions{nullptr},
                                        m_input_node_names.data(),
                                        &input_tensor,
                                        m_input_node_names.size(),      
                                        m_output_node_names.data(),
                                        m_output_node_names.size());
    if (!output_tensor.front().IsTensor() || output_tensor.size() != m_output_node_names.size() || output_tensor.front().GetTensorTypeAndShapeInfo().GetShape() != m_output_node_dims) {
        ATH_MSG_WARNING("Output tensor does not have the same size as output layer, will not apply calibration");
        jet.setAttribute<xAOD::JetFourMom_t>("JetDNNCScaleMomentum",jetStartP4);
        return StatusCode::SUCCESS;
    }
 
    // Get pointer to output tensor float values
    float* outputE = output_tensor.at(0).GetTensorMutableData<float>();
    float* outputM = output_tensor.at(1).GetTensorMutableData<float>();
 
    // Get predicted calibration factors
    float predRespE = outputE[0];  // first element is predicted response
    float predRespM = outputM[0];
 
    // Print the output predictions for E/M
    ATH_MSG_DEBUG("Output E : " << predRespE);
    ATH_MSG_DEBUG("Output M : " << predRespM);
  
    if (predRespE==0 || predRespM==0) {
        ATH_MSG_WARNING("Predictions give 0 values, will not apply calibration");
        jet.setAttribute<xAOD::JetFourMom_t>("JetDNNCScaleMomentum",jetStartP4);
        return StatusCode::SUCCESS;
    }
    
    // Apply calibration to jet p4
    float calibE = jetStartP4.e() / predRespE;
 
    // For mass only apply calibration if m>40 GeV
    float calibM = jetStartP4.mass();
    if ( calibM > 40000 ) {
        calibM /= predRespM;
    }
    
    // Propagate energy and mass calibration to jet pT
    float calibpT = std::sqrt( calibE*calibE - calibM*calibM )/std::cosh( jetStartP4.eta() );
 
    // Build calibrated jet p4
    TLorentzVector TLVjet;
    TLVjet.SetPtEtaPhiM( calibpT, jetStartP4.eta(), jetStartP4.phi(), calibM );
    xAOD::JetFourMom_t calibP4;
    calibP4.SetPxPyPzE( TLVjet.Px(), TLVjet.Py(), TLVjet.Pz(), TLVjet.E() );
 
    // Transfer calibrated jet properties to the Jet object
    jet.setAttribute<xAOD::JetFourMom_t>("JetDNNCScaleMomentum",calibP4);
    jet.setJetP4( calibP4 );
 
    return StatusCode::SUCCESS;
 
}
 
 
 
std::vector<float> GlobalLargeRDNNCalibration::getJetFeatures( xAOD::Jet& jet_reco, JetEventInfo& jetEventInfo) const {
    // Init input tensor
    std::vector<float> input_tensor_values(m_NNInputs.size());
 
    // Retrieve all input variables from the jet and/or jetEventInfo using our VarRetriever collection:
    for(size_t i=0;i<input_tensor_values.size();i++){
        float v = m_varretrievers[i]->value(jet_reco, jetEventInfo, m_eScales[i]);
        // and perform normalisation :
        input_tensor_values[i] = v*m_NormScales[i] + m_NormOffsets[i];
    }
 
    return input_tensor_values;
}