GPUCruncher.h

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* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
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* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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#pragma once
 
#include <Gaudi/AsynchronousAlgorithm.h>
#include <GaudiKernel/DataObjectHandle.h>
#include <GaudiKernel/IRndmGenSvc.h>
#include <GaudiKernel/RegistryEntry.h>
#include <GaudiKernel/RndmGenerators.h>
#include <tbb/concurrent_hash_map.h>
 
//------------------------------------------------------------------------------

class GPUCruncher : public Gaudi::AsynchronousAlgorithm {
 
public:
  using CHM = tbb::concurrent_hash_map<std::string, unsigned int>;
 
  bool isClonable() const override { return true; }

  StatusCode execute( const EventContext& ctx ) const override;
  StatusCode initialize() override;
  StatusCode finalize() override;
 
  double get_runtime() const { return m_avg_runtime; }
 
  GPUCruncher( const std::string& name, // the algorithm instance name
               ISvcLocator*       pSvc );     // the Service Locator

  virtual ~GPUCruncher(); // virtual & protected destructor
 
private:
  GPUCruncher(); // no default constructor
  GPUCruncher( const GPUCruncher& ); // no copy constructor
  GPUCruncher& operator=( const GPUCruncher& ); // no assignement
  StatusCode gpuExecute( const std::vector<double>& in, std::vector<double>& out ) const;
 
  Gaudi::Property<std::vector<std::string>> m_inpKeys{ this, "inpKeys", {}, "" };
  Gaudi::Property<std::vector<std::string>> m_outKeys{ this, "outKeys", {}, "" };
 
  Gaudi::Property<double> m_avg_runtime{ this, "avgRuntime", 1., "Average runtime of the module." };
  Gaudi::Property<double> m_var_runtime{ this, "varRuntime", 0.01, "Variance of the runtime of the module." };
 
  // For the concurrency
  const uint MAX_INPUTS  = 40;
  const uint MAX_OUTPUTS = 10;
 
  std::vector<DataObjectHandle<DataObject>*> m_inputHandles;
  std::vector<DataObjectHandle<DataObject>*> m_outputHandles;
 
  static CHM m_name_ncopies_map;
};