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Diffstat (limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorDeviceSycl.h')
-rw-r--r-- | unsupported/Eigen/CXX11/src/Tensor/TensorDeviceSycl.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceSycl.h b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceSycl.h new file mode 100644 index 000000000..7c039890e --- /dev/null +++ b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceSycl.h @@ -0,0 +1,122 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Mehdi Goli Codeplay Software Ltd. +// Ralph Potter Codeplay Software Ltd. +// Luke Iwanski Codeplay Software Ltd. +// Contact: <eigen@codeplay.com> +// Copyright (C) 2016 Benoit Steiner <benoit.steiner.goog@gmail.com> + +// +// This Source Code Form is subject to the terms of the Mozilla +// Public License v. 2.0. If a copy of the MPL was not distributed +// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. + +#if defined(EIGEN_USE_SYCL) && !defined(EIGEN_CXX11_TENSOR_TENSOR_DEVICE_SYCL_H) +#define EIGEN_CXX11_TENSOR_TENSOR_DEVICE_SYCL_H + +namespace Eigen { +struct SyclDevice { + /// class members + /// sycl queue + mutable cl::sycl::queue m_queue; + /// std::map is the container used to make sure that we create only one buffer + /// per pointer. The lifespan of the buffer now depends on the lifespan of SyclDevice. + /// If a non-read-only pointer is needed to be accessed on the host we should manually deallocate it. + mutable std::map<const void *, std::shared_ptr<void>> buffer_map; + /// creating device by using selector + template<typename dev_Selector> SyclDevice(dev_Selector s) + : +#ifdef EIGEN_EXCEPTIONS + m_queue(cl::sycl::queue(s, [=](cl::sycl::exception_list l) { + for (const auto& e : l) { + try { + std::rethrow_exception(e); + } catch (cl::sycl::exception e) { + std::cout << e.what() << std::endl; + } + } + })) +#else + m_queue(cl::sycl::queue(s)) +#endif + {} + // destructor + ~SyclDevice() { deallocate_all(); } + + template <typename T> void deallocate(T *p) const { + auto it = buffer_map.find(p); + if (it != buffer_map.end()) { + buffer_map.erase(it); + internal::aligned_free(p); + } + } + void deallocate_all() const { + std::map<const void *, std::shared_ptr<void>>::iterator it=buffer_map.begin(); + while (it!=buffer_map.end()) { + auto p=it->first; + buffer_map.erase(it); + internal::aligned_free(const_cast<void*>(p)); + it=buffer_map.begin(); + } + buffer_map.clear(); + } + + /// creation of sycl accessor for a buffer. This function first tries to find + /// the buffer in the buffer_map. If found it gets the accessor from it, if not, + ///the function then adds an entry by creating a sycl buffer for that particular pointer. + template <cl::sycl::access::mode AcMd, typename T> inline cl::sycl::accessor<T, 1, AcMd, cl::sycl::access::target::global_buffer> + get_sycl_accessor(size_t num_bytes, cl::sycl::handler &cgh, const T * ptr) const { + return (get_sycl_buffer<T>(num_bytes, ptr)->template get_access<AcMd, cl::sycl::access::target::global_buffer>(cgh)); + } + + template<typename T> inline std::pair<std::map<const void *, std::shared_ptr<void>>::iterator,bool> add_sycl_buffer(const T *ptr, size_t num_bytes) const { + using Type = cl::sycl::buffer<T, 1>; + std::pair<std::map<const void *, std::shared_ptr<void>>::iterator,bool> ret = buffer_map.insert(std::pair<const void *, std::shared_ptr<void>>(ptr, std::shared_ptr<void>(new Type(cl::sycl::range<1>(num_bytes)), + [](void *dataMem) { delete static_cast<Type*>(dataMem); }))); + (static_cast<Type*>(buffer_map.at(ptr).get()))->set_final_data(nullptr); + return ret; + } + + template <typename T> inline cl::sycl::buffer<T, 1>* get_sycl_buffer(size_t num_bytes,const T * ptr) const { + return static_cast<cl::sycl::buffer<T, 1>*>(add_sycl_buffer(ptr, num_bytes).first->second.get()); + } + + /// allocating memory on the cpu + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void *allocate(size_t) const { + return internal::aligned_malloc(8); + } + + // some runtime conditions that can be applied here + bool isDeviceSuitable() const { return true; } + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void memcpy(void *dst, const void *src, size_t n) const { + ::memcpy(dst, src, n); + } + + template<typename T> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void memcpyHostToDevice(T *dst, const T *src, size_t n) const { + auto host_acc= (static_cast<cl::sycl::buffer<T, 1>*>(add_sycl_buffer(dst, n).first->second.get()))-> template get_access<cl::sycl::access::mode::discard_write, cl::sycl::access::target::host_buffer>(); + memcpy(host_acc.get_pointer(), src, n); + } + /// whith the current implementation of sycl, the data is copied twice from device to host. This will be fixed soon. + template<typename T> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void memcpyDeviceToHost(T *dst, const T *src, size_t n) const { + auto it = buffer_map.find(src); + if (it != buffer_map.end()) { + auto host_acc= (static_cast<cl::sycl::buffer<T, 1>*>(it->second.get()))-> template get_access<cl::sycl::access::mode::read, cl::sycl::access::target::host_buffer>(); + memcpy(dst,host_acc.get_pointer(), n); + } else{ + eigen_assert("no device memory found. The memory might be destroyed before creation"); + } + } + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void memset(void *buffer, int c, size_t n) const { + ::memset(buffer, c, n); + } + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE int majorDeviceVersion() const { + return 1; + } +}; + +} // end namespace Eigen + +#endif // EIGEN_CXX11_TENSOR_TENSOR_DEVICE_SYCL_H |