Example algorithm demonstrating the use of CUDA in an AthAsynchronousAlgorithm. More...

#include <LinearTransformAsyncExampleAlg.h>

Inheritance diagram for AthCUDAExamples::LinearTransformAsyncExampleAlg:

Collaboration diagram for AthCUDAExamples::LinearTransformAsyncExampleAlg:

Public Member Functions
virtual StatusCode	execute (const EventContext &ctx) const override
	Function executing the algorithm.
StatusCode	sysExecute (const EventContext &ctx) override
	Execute an algorithm.
virtual StatusCode	restoreAfterSuspend () const override
	Restore after suspend.
virtual StatusCode	sysInitialize () override
	Override sysInitialize.
virtual bool	isClonable () const override
	Specify if the algorithm is clonable.
virtual unsigned int	cardinality () const override
	Cardinality (Maximum number of clones that can exist) special value 0 means that algorithm is reentrant.
virtual const DataObjIDColl &	extraOutputDeps () const override
	Return the list of extra output dependencies.
virtual bool	filterPassed (const EventContext &ctx) const
virtual void	setFilterPassed (bool state, const EventContext &ctx) const
ServiceHandle< StoreGateSvc > &	evtStore ()
	The standard `StoreGateSvc` (event store) Returns (kind of) a pointer to the `StoreGateSvc`.
const ServiceHandle< StoreGateSvc > &	detStore () const
	The standard `StoreGateSvc/DetectorStore` Returns (kind of) a pointer to the `StoreGateSvc`.
virtual StatusCode	sysStart () override
	Handle START transition.
virtual std::vector< Gaudi::DataHandle * >	inputHandles () const override
	Return this algorithm's input handles.
virtual std::vector< Gaudi::DataHandle * >	outputHandles () const override
	Return this algorithm's output handles.
Gaudi::Details::PropertyBase &	declareProperty (Gaudi::Property< T, V, H > &t)
void	updateVHKA (Gaudi::Details::PropertyBase &)
MsgStream &	msg () const
bool	msgLvl (const MSG::Level lvl) const

Protected Member Functions
void	renounceArray (SG::VarHandleKeyArray &handlesArray)
	remove all handles from I/O resolution
std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void >	renounce (T &h)
void	extraDeps_update_handler (Gaudi::Details::PropertyBase &ExtraDeps)
	Add StoreName to extra input/output deps as needed.

Protected Attributes
boost::fibers::fiber_specific_ptr< EventContext > m_currentCtx	ATLAS_THREAD_SAFE {nullptr}
	Pointer to current context.

Private Types
typedef ServiceHandle< StoreGateSvc >	StoreGateSvc_t

Private Member Functions
StatusCode	linearTransform (std::vector< float > &arr, float multiplier) const
	GPU kernel launcher.
Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T, V, H > &hndl, const SG::VarHandleKeyType &)
	specialization for handling Gaudi::Property<SG::VarHandleKey>

Private Attributes
DataObjIDColl	m_extendedExtraObjects
	Extra output dependency collection, extended by AthAlgorithmDHUpdate to add symlinks.
StoreGateSvc_t	m_evtStore
	Pointer to StoreGate (event store by default)
StoreGateSvc_t	m_detStore
	Pointer to StoreGate (detector store by default)
std::vector< SG::VarHandleKeyArray * >	m_vhka
bool	m_varHandleArraysDeclared

Detailed Description

Example algorithm demonstrating the use of CUDA in an AthAsynchronousAlgorithm.

Modified from a previous implementation using AthCUDA and a Blocking algorithm by Attila Krasznahorkay Attil.nosp@m.a.Kr.nosp@m.aszna.nosp@m.hork.nosp@m.ay@ce.nosp@m.rn.c.nosp@m.h

Author: Beojan Stanislaus beoja.nosp@m.n.st.nosp@m.anisl.nosp@m.aus@.nosp@m.cern..nosp@m.ch

Definition at line 23 of file LinearTransformAsyncExampleAlg.h.

Member Typedef Documentation

◆ StoreGateSvc_t

typedef ServiceHandle<StoreGateSvc> AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::StoreGateSvc_t

privateinherited

Definition at line 388 of file AthCommonDataStore.h.

Member Function Documentation

◆ cardinality()

unsigned int AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::cardinality ( ) const

overridevirtualinherited

Cardinality (Maximum number of clones that can exist) special value 0 means that algorithm is reentrant.

Override this to return 0 for reentrant algorithms.

Definition at line 75 of file AthCommonReentrantAlgorithm.cxx.

{
  return 0;
}

◆ declareGaudiProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::declareGaudiProperty	(	Gaudi::Property< T, V, H > &	hndl,
		const SG::VarHandleKeyType &	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKey>

Definition at line 156 of file AthCommonDataStore.h.

  {
    return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                       hndl.value(), 
                                                       hndl.documentation());
 
  }

◆ declareProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::declareProperty ( Gaudi::Property< T, V, H > & t )

inlineinherited

Definition at line 145 of file AthCommonDataStore.h.

                                                                     {
    typedef typename SG::HandleClassifier<T>::type htype;
    return AthCommonDataStore<PBASE>::declareGaudiProperty(t, htype());
  }

◆ detStore()

const ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::detStore ( ) const

inlineinherited

The standard StoreGateSvc/DetectorStore Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 95 of file AthCommonDataStore.h.

95{ return m_detStore; }

AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::m_detStore

StoreGateSvc_t m_detStore

Definition AthCommonDataStore.h:393

◆ evtStore()

ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::evtStore ( )

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 85 of file AthCommonDataStore.h.

85{ return m_evtStore; }

AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::m_evtStore

StoreGateSvc_t m_evtStore

Definition AthCommonDataStore.h:390

◆ execute()

StatusCode AthCUDAExamples::LinearTransformAsyncExampleAlg::execute ( const EventContext & ctx ) const

overridevirtual

Function executing the algorithm.

Definition at line 10 of file LinearTransformAsyncExampleAlg.cxx.

                                                                            {
  ATH_MSG_INFO("Starting execute");
 
  // Create a dummy array variable in pinned memory that will be multiplied by
  // some amount.
  static const std::size_t ARRAY_SIZE = 10000;
  static const float ARRAY_ELEMENT = 3.141592f;
  std::vector<float> dummyArray(ARRAY_SIZE, ARRAY_ELEMENT);
 
  // Run calculation. See LinearTransformAsyncExampleAlg.cu.
  static const float MULTIPLIER = 1.23f;
  ATH_MSG_INFO("Starting linearTransform");
  ATH_CHECK(linearTransform(dummyArray, MULTIPLIER));
 
  // Check if the operation succeeded.
  static const float EXPECTED_RESULT = ARRAY_ELEMENT * MULTIPLIER;
  for (std::size_t i = 0; i < ARRAY_SIZE; ++i) {
    if (std::abs(dummyArray[i] - EXPECTED_RESULT) > 0.001) {
      ATH_MSG_ERROR("The CUDA transformation failed to run");
      return StatusCode::FAILURE;
    }
  }
 
  // Return gracefully.
  return StatusCode::SUCCESS;
}

◆ extraDeps_update_handler()

void AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::extraDeps_update_handler ( Gaudi::Details::PropertyBase & ExtraDeps )

protectedinherited

Add StoreName to extra input/output deps as needed.

use the logic of the VarHandleKey to parse the DataObjID keys supplied via the ExtraInputs and ExtraOuputs Properties to add the StoreName if it's not explicitly given

◆ extraOutputDeps()

const DataObjIDColl & AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::extraOutputDeps ( ) const

overridevirtualinherited

Return the list of extra output dependencies.

This list is extended to include symlinks implied by inheritance relations.

Definition at line 94 of file AthCommonReentrantAlgorithm.cxx.

{
  // If we didn't find any symlinks to add, just return the collection
  // from the base class.  Otherwise, return the extended collection.
  if (!m_extendedExtraObjects.empty()) {
    return m_extendedExtraObjects;
  }
  return BaseAlg::extraOutputDeps();
}

◆ filterPassed()

virtual bool AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::filterPassed ( const EventContext & ctx ) const

inlinevirtualinherited

Definition at line 96 of file AthCommonReentrantAlgorithm.h.

                                                           {
    return execState( ctx ).filterPassed();
  }

◆ inputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::inputHandles ( ) const

overridevirtualinherited

Return this algorithm's input handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ isClonable()

bool AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::isClonable ( ) const

overridevirtualinherited

Specify if the algorithm is clonable.

Reentrant algorithms are clonable.

Definition at line 68 of file AthCommonReentrantAlgorithm.cxx.

{
  // Reentrant algorithms are clonable.
  return true;
}

◆ linearTransform()

StatusCode AthCUDAExamples::LinearTransformAsyncExampleAlg::linearTransform	(	std::vector< float > &	arr,
		float	multiplier ) const

private

GPU kernel launcher.

◆ msg()

MsgStream & AthCommonMsg< Gaudi::AsynchronousAlgorithm >::msg ( ) const

inlineinherited

Definition at line 24 of file AthCommonMsg.h.

                                {
    return this->msgStream();
  }

◆ msgLvl()

bool AthCommonMsg< Gaudi::AsynchronousAlgorithm >::msgLvl ( const MSG::Level lvl ) const

inlineinherited

Definition at line 30 of file AthCommonMsg.h.

                                               {
    return this->msgLevel(lvl);
  }

◆ outputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::outputHandles ( ) const

overridevirtualinherited

Return this algorithm's output handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ renounce()

std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void > AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::renounce ( T & h )

inlineprotectedinherited

Definition at line 380 of file AthCommonDataStore.h.

  {
    h.renounce();
    PBASE::renounce (h);
  }

◆ renounceArray()

void AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::renounceArray ( SG::VarHandleKeyArray & handlesArray )

inlineprotectedinherited

remove all handles from I/O resolution

Definition at line 364 of file AthCommonDataStore.h.

                                                          {
    handlesArray.renounce();
  }

◆ restoreAfterSuspend()

StatusCode AthAsynchronousAlgorithm::restoreAfterSuspend ( ) const

overridevirtualinherited

Restore after suspend.

Definition at line 30 of file AthAsynchronousAlgorithm.cxx.

                                                               {
  auto* currentCtx = m_currentCtx.get();
  ATH_MSG_DEBUG("Setting current context to " << (void*)currentCtx);
  Gaudi::Hive::setCurrentContext(currentCtx);
  return StatusCode::SUCCESS;
}

◆ setFilterPassed()

virtual void AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::setFilterPassed	(	bool	state,
		const EventContext &	ctx ) const

inlinevirtualinherited

Definition at line 100 of file AthCommonReentrantAlgorithm.h.

                                                                            {
    execState( ctx ).setFilterPassed( state );
  }

◆ sysExecute()

StatusCode AthAsynchronousAlgorithm::sysExecute ( const EventContext & ctx )

overridevirtualinherited

Execute an algorithm.

We override this in order to work around an issue with the Algorithm base class storing the event context in a member variable that can cause crashes in MT jobs.

Reimplemented from AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >.

Definition at line 11 of file AthAsynchronousAlgorithm.cxx.

                                                                       {
  ATH_MSG_VERBOSE("Starting sysExecute for AthAsynchronousAlgorithm on slot "
                  << ctx.slot());
  if (m_currentCtx.get() == nullptr) {
    // const_cast because fiber_specific_ptr doesn't support const pointers
    // The const is never actually violated
    EventContext* ctx_temp ATLAS_THREAD_SAFE = const_cast<EventContext*>(&ctx);
    m_currentCtx.reset(ctx_temp);
  } else if (m_currentCtx->evt() != ctx.evt() ||
             m_currentCtx->slot() != ctx.slot()) {
    ATH_MSG_ERROR("m_currentCtx is set to "
                  << m_currentCtx->evt() << " (slot " << m_currentCtx->slot()
                  << ") but incorrect. It should be " << ctx.evt() << "(slot "
                  << ctx.slot() << ")");
    return StatusCode::FAILURE;
  }
  return Gaudi::AsynchronousAlgorithm::sysExecute(ctx);
}

◆ sysInitialize()

StatusCode AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::sysInitialize ( )

overridevirtualinherited

Override sysInitialize.

Override sysInitialize from the base class.

Loop through all output handles, and if they're WriteCondHandles, automatically register them and this Algorithm with the CondSvc

Scan through all outputHandles, and if they're WriteCondHandles, register them with the CondSvc

Reimplemented from AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >.

Definition at line 61 of file AthCommonReentrantAlgorithm.cxx.

                                                               {
  StatusCode sc=AthCommonDataStore<AthCommonMsg<BaseAlg>>::sysInitialize();
 
  if (sc.isFailure()) {
    return sc;
  }
  
  ServiceHandle<ICondSvc> cs("CondSvc",name());
  for (auto h : outputHandles()) {
    if (h->isCondition() && h->mode() == Gaudi::DataHandle::Writer) {
      // do this inside the loop so we don't create the CondSvc until needed
      if ( cs.retrieve().isFailure() ) {
        ATH_MSG_WARNING("no CondSvc found: won't autoreg WriteCondHandles");
        return StatusCode::SUCCESS;
      }      
      if (cs->regHandle(this,*h).isFailure()) {
        sc = StatusCode::FAILURE;
        ATH_MSG_ERROR("unable to register WriteCondHandle " << h->fullKey()
                      << " with CondSvc");
      }
    }
  }
  return sc;  
}

◆ sysStart()

virtual StatusCode AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::sysStart ( )

overridevirtualinherited

Handle START transition.

We override this in order to make sure that conditions handle keys can cache a pointer to the conditions container.

◆ updateVHKA()

void AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::updateVHKA ( Gaudi::Details::PropertyBase & )

inlineinherited

Definition at line 308 of file AthCommonDataStore.h.

                                               {
    // debug() << "updateVHKA for property " << p.name() << " " << p.toString() 
    //         << "  size: " << m_vhka.size() << endmsg;
    for (auto &a : m_vhka) {
      std::vector<SG::VarHandleKey*> keys = a->keys();
      for (auto k : keys) {
        k->setOwner(this);
      }
    }
  }

Member Data Documentation

◆ ATLAS_THREAD_SAFE

boost::fibers::fiber_specific_ptr<EventContext> m_currentCtx AthAsynchronousAlgorithm::ATLAS_THREAD_SAFE {nullptr}

mutableprotectedinherited

Pointer to current context.

Definition at line 43 of file AthAsynchronousAlgorithm.h.

43{nullptr};

◆ m_detStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::m_detStore

privateinherited

Pointer to StoreGate (detector store by default)

Definition at line 393 of file AthCommonDataStore.h.

◆ m_evtStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::m_evtStore

privateinherited

Pointer to StoreGate (event store by default)

Definition at line 390 of file AthCommonDataStore.h.

◆ m_extendedExtraObjects

DataObjIDColl AthCommonReentrantAlgorithm< Gaudi::AsynchronousAlgorithm >::m_extendedExtraObjects

privateinherited

Extra output dependency collection, extended by AthAlgorithmDHUpdate to add symlinks.

Empty if no symlinks were found.

Definition at line 114 of file AthCommonReentrantAlgorithm.h.

◆ m_varHandleArraysDeclared

bool AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::m_varHandleArraysDeclared

privateinherited

Definition at line 399 of file AthCommonDataStore.h.

◆ m_vhka

std::vector<SG::VarHandleKeyArray*> AthCommonDataStore< AthCommonMsg< Gaudi::AsynchronousAlgorithm > >::m_vhka

privateinherited

Definition at line 398 of file AthCommonDataStore.h.

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Protected Attributes

Private Types

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ StoreGateSvc_t

Member Function Documentation

◆ cardinality()

◆ declareGaudiProperty()

◆ declareProperty()

◆ detStore()

◆ evtStore()

◆ execute()

◆ extraDeps_update_handler()

◆ extraOutputDeps()

◆ filterPassed()

◆ inputHandles()

◆ isClonable()

◆ linearTransform()

◆ msg()

◆ msgLvl()

◆ outputHandles()

◆ renounce()

◆ renounceArray()

◆ restoreAfterSuspend()

◆ setFilterPassed()

◆ sysExecute()

◆ sysInitialize()

◆ sysStart()

◆ updateVHKA()

Member Data Documentation

◆ ATLAS_THREAD_SAFE

◆ m_detStore

◆ m_evtStore

◆ m_extendedExtraObjects

◆ m_varHandleArraysDeclared

◆ m_vhka