Homec4science
Diffusion lammps (lammm-devel) Browse

lammps/lib/gpu/geryon/ucl_d_vec.h
945343265e0elammm-devel

Last Change
Raw File

ucl_d_vec.h
View Options

/***************************************************************************
ucl_d_vec.h
-------------------
W. Michael Brown
Vector Container on Device
__________________________________________________________________________
This file is part of the Geryon Unified Coprocessor Library (UCL)
__________________________________________________________________________
begin : Thu Jun 25 2009
copyright : (C) 2009 by W. Michael Brown
email : brownw@ornl.gov
***************************************************************************/
/* -----------------------------------------------------------------------
Copyright (2009) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the Simplified BSD License.
----------------------------------------------------------------------- */
// Only allow this file to be included by CUDA and OpenCL specific headers
#ifdef _UCL_MAT_ALLOW
/// Row vector on device
template <class numtyp>
class UCL_D_Vec : public UCL_BaseMat {
public:
// Traits for copying data
// MEM_TYPE is 0 for device, 1 for host, and 2 for image
enum traits {
DATA_TYPE = _UCL_DATA_ID<numtyp>::id,
MEM_TYPE = 0,
PADDED = 0,
ROW_MAJOR = 1,
VECTOR = 1
};
typedef numtyp data_type;
UCL_D_Vec() : _cols(0), _kind(UCL_VIEW) {}
~UCL_D_Vec() { if (_kind!=UCL_VIEW) _device_free(*this); }
/// Construct with n columns
/** \sa alloc() **/
UCL_D_Vec(const size_t n, UCL_Device &device,
const enum UCL_MEMOPT kind=UCL_READ_WRITE) :
_cols(0), _kind(UCL_VIEW) { alloc(n,device,kind); }
/// Set up host vector with 'cols' columns and reserve memory
/** The kind parameter controls memory optimizations as follows:
* - UCL_READ_WRITE - Specify that you will read and write in kernels
* - UCL_WRITE_ONLY - Specify that you will only write in kernels
* - UCL_READ_ONLY - Specify that you will only read in kernels
* \param cq Default command queue for operations copied from another mat
* \return UCL_SUCCESS if the memory allocation is successful **/
template <class mat_type>
inline int alloc(const size_t cols, mat_type &cq,
const enum UCL_MEMOPT kind=UCL_READ_WRITE) {
clear();
_row_bytes=cols*sizeof(numtyp);
int err=_device_alloc(*this,cq,_row_bytes,kind);
if (err!=UCL_SUCCESS) {
#ifndef UCL_NO_EXIT
std::cerr << "UCL Error: Could not allocate " << _row_bytes
<< " bytes on device.\n";
_row_bytes=0;
exit(1);
#endif
_row_bytes=0;
return err;
}
_kind=kind;
_cols=cols;
#ifndef _UCL_DEVICE_PTR_MAT
_end=_array+cols;
#endif
#ifdef _OCL_MAT
_offset=0;
#endif
return err;
}
/// Set up host vector with 'cols' columns and reserve memory
/** The kind parameter controls memory optimizations as follows:
* - UCL_READ_WRITE - Specify that you will read and write in kernels
* - UCL_WRITE_ONLY - Specify that you will only write in kernels
* - UCL_READ_ONLY - Specify that you will only read in kernels
* \param device Used to get the default command queue for operations
* \return UCL_SUCCESS if the memory allocation is successful **/
inline int alloc(const size_t cols, UCL_Device &device,
const enum UCL_MEMOPT kind=UCL_READ_WRITE) {
clear();
_row_bytes=cols*sizeof(numtyp);
int err=_device_alloc(*this,device,_row_bytes,kind);
if (err!=UCL_SUCCESS) {
#ifndef UCL_NO_EXIT
std::cerr << "UCL Error: Could not allocate " << _row_bytes
<< " bytes on device.\n";
_row_bytes=0;
exit(1);
#endif
_row_bytes=0;
return err;
}
_kind=kind;
_cols=cols;
#ifndef _UCL_DEVICE_PTR_MAT
_end=_array+cols;
#endif
#ifdef _OCL_MAT
_offset=0;
#endif
return err;
}
/// Return the type of memory allocation
/** Returns UCL_READ_WRITE, UCL_WRITE_ONLY, UCL_READ_ONLY, or UCL_VIEW **/
inline enum UCL_MEMOPT kind() const { return _kind; }
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container **/
template <class ucl_type>
inline void view(ucl_type &input, const size_t rows, const size_t cols) {
#ifdef UCL_DEBUG
assert(rows==1);
#endif
clear();
_kind=UCL_VIEW;
_cols=cols;
_row_bytes=_cols*sizeof(numtyp);
this->_cq=input.cq();
#ifdef _OCL_MAT
_offset=0;
_array=input.cbegin();
#else
_device_view(&_array,input.begin());
#endif
#ifndef _UCL_DEVICE_PTR_MAT
_end=_array+_cols;
#endif
}
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* \param stride Number of _elements_ between the start of each row **/
template <class ucl_type>
inline void view(ucl_type &input, const size_t rows, const size_t cols,
const size_t stride) { view(input,rows,cols); }
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* - If a matrix is used a input, all elements (including padding)
* will be used for view **/
template <class ucl_type>
inline void view(ucl_type &input, const size_t cols)
{ view(input,1,cols); }
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* - If a matrix is used a input, all elements (including padding)
* will be used for view **/
template <class ucl_type>
inline void view(ucl_type &input)
{ view(input,input.rows()*input.row_size()); }
/// Do not allocate memory, instead use an existing allocation
/** - No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container **/
template <class ptr_type>
inline void view(ptr_type input, const size_t rows, const size_t cols,
UCL_Device &dev) {
#ifdef UCL_DEBUG
assert(rows==1);
#endif
clear();
_kind=UCL_VIEW;
_cols=cols;
_row_bytes=_cols*sizeof(numtyp);
this->_cq=dev.cq();
_array=input;
#ifndef _UCL_DEVICE_PTR_MAT
_end=_array+_cols;
#endif
#ifdef _OCL_MAT
_offset=0;
#endif
}
/// Do not allocate memory, instead use an existing allocation
/** - No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* \param stride Number of _elements_ between the start of each row **/
template <class ptr_type>
inline void view(ptr_type input, const size_t rows, const size_t cols,
const size_t stride, UCL_Device &dev)
{ view(input,rows,cols,stride); }
/// Do not allocate memory, instead use an existing allocation
/** - No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container **/
template <class ptr_type>
inline void view(ptr_type input, const size_t cols, UCL_Device &dev)
{ view(input,1,cols,dev); }
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container **/
template <class ucl_type>
inline void view_offset(const size_t offset,ucl_type &input,const size_t rows,
const size_t cols) {
#ifdef UCL_DEBUG
assert(rows==1);
#endif
clear();
_kind=UCL_VIEW;
_cols=cols;
_row_bytes=_cols*sizeof(numtyp);
this->_cq=input.cq();
#ifdef _OCL_MAT
_array=input.begin();
_offset=offset;
#else
_device_view(&_array,input.begin(),offset,sizeof(numtyp));
#endif
#ifndef _UCL_DEVICE_PTR_MAT
_end=_array+_cols;
#endif
}
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* \param stride Number of _elements_ between the start of each row **/
template <class ucl_type>
inline void view_offset(const size_t offset,ucl_type &input,const size_t rows,
const size_t cols, const size_t stride)
{ view_offset(offset,input,rows,cols); }
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* - If a matrix is used a input, all elements (including padding)
* will be used for view **/
template <class ucl_type>
inline void view_offset(const size_t offset,ucl_type &input,const size_t cols)
{ view_offset(offset,input,1,cols); }
/// Do not allocate memory, instead use an existing allocation from Geryon
/** This function must be passed a Geryon vector or matrix container.
* No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* - If a matrix is used a input, all elements (including padding)
* will be used for view **/
template <class ucl_type>
inline void view_offset(const size_t offset, ucl_type &input)
{ view_offset(offset,input,input.rows()*input.row_size()-offset); }
/// Do not allocate memory, instead use an existing allocation
/** - No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container **/
template <class ptr_type>
inline void view_offset(const size_t offset,ptr_type input,const size_t rows,
const size_t cols, UCL_Device &dev) {
#ifdef UCL_DEBUG
assert(rows==1);
#endif
clear();
_kind=UCL_VIEW;
_cols=cols;
_row_bytes=_cols*sizeof(numtyp);
this->_cq=dev.cq();
#ifdef _OCL_MAT
_array=input;
_offset=offset;
#else
#ifdef _UCL_DEVICE_PTR_MAT
_array=input+offset*sizeof(numtyp);
#else
_array=input+offset;
#endif
#endif
#ifndef _UCL_DEVICE_PTR_MAT
_end=_array+_cols;
#endif
}
/// Do not allocate memory, instead use an existing allocation
/** - No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container
* \param stride Number of _elements_ between the start of each row **/
template <class ptr_type>
inline void view_offset(const size_t offset,ptr_type input,const size_t rows,
const size_t cols,const size_t stride,UCL_Device &dev)
{ view_offset(offset,input,rows,cols,stride); }
/// Do not allocate memory, instead use an existing allocation
/** - No memory is freed when the object is destructed.
* - The view does not prevent the memory from being freed by the
* allocating container **/
template <class ptr_type>
inline void view_offset(const size_t offset, ptr_type input,
const size_t cols, UCL_Device &dev)
{ view_offset(offset,input,1,cols,dev); }
/// Free memory and set size to 0
inline void clear()
{ if (_kind!=UCL_VIEW) { _cols=0; _kind=UCL_VIEW; _device_free(*this); } }
/// Set each element to zero
inline void zero() { _device_zero(*this,row_bytes()); }
/// Set first n elements to zero
inline void zero(const int n) { _device_zero(*this,n*sizeof(numtyp)); }
#ifdef _UCL_DEVICE_PTR_MAT
/// For OpenCL, returns a (void *) device pointer to memory allocation
inline device_ptr & begin() { return _array; }
/// For OpenCL, returns a (void *) device pointer to memory allocation
inline const device_ptr & begin() const { return _array; }
#else
/// For CUDA-RT, get device pointer to first element
inline numtyp * begin() { return _array; }
/// For CUDA-RT, get device pointer to first element
inline const numtyp * begin() const { return _array; }
/// For CUDA-RT, get device pointer to one past last element
inline numtyp * end() { return _end; }
/// For CUDA-RT, get device pointer to one past last element
inline const numtyp * end() const { return _end; }
#endif
#ifdef _UCL_DEVICE_PTR_MAT
/// Returns an API specific device pointer
/** - For OpenCL, returns a &cl_mem object
* - For CUDA Driver, returns a &CUdeviceptr
* - For CUDA-RT, returns void** **/
inline device_ptr & cbegin() { return _array; }
/// Returns an API specific device pointer
/** - For OpenCL, returns a &cl_mem object
* - For CUDA Driver, returns a &CUdeviceptr
* - For CUDA-RT, returns void** **/
inline const device_ptr & cbegin() const { return _array; }
#else
/// Returns an API specific device pointer
/** - For OpenCL, returns a &cl_mem object
* - For CUDA Driver, returns a &CUdeviceptr
* - For CUDA-RT, returns numtyp** **/
inline numtyp ** cbegin() { return &_array; }
/// Returns an API specific device pointer
/** - For OpenCL, returns a &cl_mem object
* - For CUDA Driver, returns a &CUdeviceptr
* - For CUDA-RT, returns numtyp** **/
inline const numtyp ** cbegin() const { return &_array; }
/// For CUDA-RT, allocate row vector and bind texture
inline void safe_alloc(const size_t cols, UCL_Device &dev,
textureReference *t)
{ alloc(cols,dev); assign_texture(t); bind(); }
/// For CUDA-RT, assign a texture to matrix
inline void assign_texture(textureReference *t) { _tex_ptr=t; }
/// For CUDA-RT, bind to texture
inline void bind() {
cuda_gb_get_channel<numtyp>(_channel);
(*_tex_ptr).addressMode[0] = cudaAddressModeClamp;
(*_tex_ptr).addressMode[1] = cudaAddressModeClamp;
(*_tex_ptr).filterMode = cudaFilterModePoint;
(*_tex_ptr).normalized = false;
CUDA_SAFE_CALL(cudaBindTexture(NULL,_tex_ptr,_array,&_channel));
}
/// For CUDA-RT, unbind texture
inline void unbind() { CUDA_SAFE_CALL(cudaUnbindTexture(_tex_ptr)); }
#endif
/// Get the number of elements
inline size_t numel() const { return _cols; }
/// Get the number of rows
inline size_t rows() const { return 1; }
/// Get the number of columns
inline size_t cols() const { return _cols; }
///Get the size of a row (including any padding) in elements
inline size_t row_size() const { return _cols; }
/// Get the size of a row (including any padding) in bytes
inline size_t row_bytes() const { return _row_bytes; }
/// Get the size in bytes of 1 element
inline int element_size() const { return sizeof(numtyp); }
#ifdef _OCL_MAT
/// Return the offset (in elements) from begin() pointer where data starts
/** \note Always 0 for host matrices and CUDA APIs **/
inline size_t offset() const { return _offset; }
#else
/// Return the offset (in elements) from begin() pointer where data starts
/** \note Always 0 for host matrices and CUDA APIs **/
inline size_t offset() const { return 0; }
#endif
/// Return the offset (in bytes) from begin() pointer where data starts
/** \note Always 0 for host matrices and CUDA APIs **/
inline size_t byteoff() const { return offset()*sizeof(numtyp); }
private:
size_t _row_bytes, _row_size, _rows, _cols;
enum UCL_MEMOPT _kind;
#ifdef _UCL_DEVICE_PTR_MAT
device_ptr _array;
#else
numtyp *_array,*_end;
cudaChannelFormatDesc _channel;
textureReference *_tex_ptr;
#endif
#ifdef _OCL_MAT
size_t _offset;
#endif
};
#endif
c4science · Help