mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-10-16 07:09:35 +00:00
200928ef35
Next up is using this by default pretty much everywhere you want to run an algorithm but don't care on what device.
224 lines
8.2 KiB
C++
224 lines
8.2 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_RuntimeDeviceTracker_h
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#define vtk_m_cont_RuntimeDeviceTracker_h
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#include <vtkm/cont/DeviceAdapterAlgorithm.h>
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#include <vtkm/cont/ErrorBadAllocation.h>
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#include <vtkm/cont/RuntimeDeviceInformation.h>
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namespace vtkm {
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namespace cont {
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namespace detail {
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struct RuntimeDeviceTrackerInternals;
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}
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/// A class that can be used to determine if a given device adapter
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/// is supported on the current machine at runtime. This is a more
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/// complex version of vtkm::cont::RunimeDeviceInformation, as this can
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/// also track when worklets fail, why the fail, and will update the list
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/// of valid runtime devices based on that information.
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///
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///
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class VTKM_ALWAYS_EXPORT RuntimeDeviceTracker
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{
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public:
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VTKM_CONT_EXPORT
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VTKM_CONT
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RuntimeDeviceTracker();
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VTKM_CONT_EXPORT
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VTKM_CONT
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~RuntimeDeviceTracker();
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/// Returns true if the given device adapter is supported on the current
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/// machine.
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///
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template<typename DeviceAdapterTag>
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VTKM_CONT
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bool CanRunOn(DeviceAdapterTag) const
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{
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using Traits = vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag>;
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return this->CanRunOnImpl(Traits::GetId(), Traits::GetName());
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}
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/// Report a failure to allocate memory on a device, this will flag the
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/// device as being unusable for all future invocations of the instance of
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/// the filter.
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///
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template<typename DeviceAdapterTag>
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VTKM_CONT
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void ReportAllocationFailure(DeviceAdapterTag,
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const vtkm::cont::ErrorBadAllocation&)
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{
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using Traits = vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag>;
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this->SetDeviceState(Traits::GetId(), Traits::GetName(), false);
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}
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/// Reset the tracker for the given device. This will discard any updates
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/// caused by reported failures
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///
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template<typename DeviceAdapterTag>
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VTKM_CONT
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void ResetDevice(DeviceAdapterTag)
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{
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using Traits = vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag>;
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vtkm::cont::RuntimeDeviceInformation<DeviceAdapterTag> runtimeDevice;
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this->SetDeviceState(Traits::GetId(),
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Traits::GetName(),
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runtimeDevice.Exists());
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}
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/// Reset the tracker to its default state for default devices.
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/// Will discard any updates caused by reported failures.
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///
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VTKM_CONT_EXPORT
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VTKM_CONT
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void Reset();
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/// \brief Perform a deep copy of the \c RuntimeDeviceTracker state.
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///
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/// Normally when you assign or copy a \c RuntimeDeviceTracker, they share
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/// state so that when you change the state of one (for example, find a
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/// device that does not work), the other is also implicitly updated. This
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/// important so that when you use the global runtime device tracker the
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/// state is synchronized across all the units using it.
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///
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/// If you want a \c RuntimeDeviceTracker with independent state, just create
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/// one independently. If you want to start with the state of a source
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/// \c RuntimeDeviceTracker but update the state indepenently, you can use
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/// \c DeepCopy method to get the initial state. Further changes will
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/// not be shared.
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///
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/// This version of \c DeepCopy creates a whole new \c RuntimeDeviceTracker
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/// with a state that is not shared with any other object.
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///
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VTKM_CONT_EXPORT
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VTKM_CONT
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vtkm::cont::RuntimeDeviceTracker DeepCopy() const;
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/// \brief Perform a deep copy of the \c RuntimeDeviceTracker state.
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///
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/// Normally when you assign or copy a \c RuntimeDeviceTracker, they share
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/// state so that when you change the state of one (for example, find a
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/// device that does not work), the other is also implicitly updated. This
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/// important so that when you use the global runtime device tracker the
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/// state is synchronized across all the units using it.
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///
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/// If you want a \c RuntimeDeviceTracker with independent state, just create
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/// one independently. If you want to start with the state of a source
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/// \c RuntimeDeviceTracker but update the state indepenently, you can use
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/// \c DeepCopy method to get the initial state. Further changes will
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/// not be shared.
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///
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/// This version of \c DeepCopy sets the state of the current object to
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/// the one given in the argument. Any other \c RuntimeDeviceTrackers sharing
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/// state with this object will also get updated. This method is good for
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/// restoring a state that was previously saved.
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///
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VTKM_CONT_EXPORT
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VTKM_CONT
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void DeepCopy(const vtkm::cont::RuntimeDeviceTracker &src);
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/// \brief Disable the given device
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///
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/// The main intention of \c RuntimeDeviceTracker is to keep track of what
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/// devices are working for VTK-m. However, it can also be used to turn
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/// devices on and off. Use this method to disable (turn off) a given device.
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/// Use \c ResetDevice to turn the device back on (if it is supported).
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///
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template<typename DeviceAdapterTag>
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VTKM_CONT
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void DisableDevice(DeviceAdapterTag)
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{
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using Traits = vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag>;
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this->SetDeviceState(Traits::GetId(), Traits::GetName(), false);
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}
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/// \brief Disable all devices except the specified one.
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///
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/// The main intention of \c RuntimeDeviceTracker is to keep track of what
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/// devices are working for VTK-m. However, it can also be used to turn
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/// devices on and off. Use this method to disable all devices except one
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/// to effectively force VTK-m to use that device. Use \c Reset restore
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/// all devices to their default values. You can also use the \c DeepCopy
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/// methods to save and restore the state.
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///
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/// This method will throw a \c ErrorBadValue if the given device does not
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/// exist on the system.
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///
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template<typename DeviceAdapterTag>
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VTKM_CONT
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void ForceDevice(DeviceAdapterTag)
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{
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using Traits = vtkm::cont::DeviceAdapterTraits<DeviceAdapterTag>;
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vtkm::cont::RuntimeDeviceInformation<DeviceAdapterTag> runtimeDevice;
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this->ForceDeviceImpl(Traits::GetId(),
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Traits::GetName(),
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runtimeDevice.Exists());
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}
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private:
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std::shared_ptr<detail::RuntimeDeviceTrackerInternals> Internals;
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VTKM_CONT_EXPORT
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VTKM_CONT
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void CheckDevice(vtkm::cont::DeviceAdapterId deviceId,
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const vtkm::cont::DeviceAdapterNameType &deviceName) const;
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VTKM_CONT_EXPORT
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VTKM_CONT
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bool CanRunOnImpl(vtkm::cont::DeviceAdapterId deviceId,
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const vtkm::cont::DeviceAdapterNameType &deviceName) const;
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VTKM_CONT_EXPORT
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VTKM_CONT
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void SetDeviceState(vtkm::cont::DeviceAdapterId deviceId,
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const vtkm::cont::DeviceAdapterNameType &deviceName,
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bool state);
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VTKM_CONT_EXPORT
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VTKM_CONT
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void ForceDeviceImpl(vtkm::cont::DeviceAdapterId deviceId,
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const vtkm::cont::DeviceAdapterNameType &deviceName,
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bool runtimeExists);
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};
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/// \brief Get the global \c RuntimeDeviceTracker.
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///
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/// Many features in VTK-m will attempt to run algorithms on the "best
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/// available device." This often is determined at runtime as failures in
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/// one device are recorded and that device is disabled. To prevent having
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/// to check over and over again, VTK-m features generally use the global
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/// device adapter so that these choices are marked and shared.
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///
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VTKM_CONT_EXPORT
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VTKM_CONT
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vtkm::cont::RuntimeDeviceTracker GetGlobalRuntimeDeviceTracker();
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}
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} // namespace vtkm::cont
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#endif //vtk_m_filter_RuntimeDeviceTracker_h
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