gpu_utils.cpp File Reference

#include "gmxpre.h"
#include "gpu_utils.h"
#include "config.h"
#include <cassert>
#include "gromacs/hardware/gpu_hw_info.h"
#include "gromacs/utility/arrayref.h"
#include "gromacs/utility/smalloc.h"
#include "gromacs/utility/stringutil.h"

Include dependency graph for gpu_utils.cpp:

Description

Function definitions for non-GPU builds.

Author

Mark Abraham mark..nosp@m.j.ab.nosp@m.raham.nosp@m.@gma.nosp@m.il.co.nosp@m.m

Functions
bool	canPerformGpuDetection ()
	Return whether GPUs can be detected. More...
int	gpu_info_get_stat (const gmx_gpu_info_t &, int)
	Get status of device with specified index.
void	free_gpu_info (const gmx_gpu_info_t *gpu_info)
	Frees the gpu_dev and dev_use array fields of gpu_info. More...
std::vector< int >	getCompatibleGpus (const gmx_gpu_info_t &gpu_info)
	Return a container of the detected GPUs that are compatible. More...
const char *	getGpuCompatibilityDescription (const gmx_gpu_info_t &gpu_info, int index)
	Return a string describing how compatible the GPU with given index is. More...
static bool	addMessageIfNotSupported (gmx::ArrayRef< const std::string > errorReasons, std::string *error)
	Help build a descriptive message in error if there are errorReasons why nonbondeds on a GPU are not supported. More...
bool	buildSupportsNonbondedOnGpu (std::string *error)
	Check if GROMACS has been built with GPU support. More...

Variables
static constexpr bool	c_binarySupportsGpus = (GMX_GPU != GMX_GPU_NONE)
	Constant used to help minimize preprocessed code.

Function Documentation

static bool addMessageIfNotSupported ( gmx::ArrayRef< const std::string >  errorReasons, std::string *  error  )

static

Help build a descriptive message in error if there are errorReasons why nonbondeds on a GPU are not supported.

Returns

Whether the lack of errorReasons indicate there is support.

bool buildSupportsNonbondedOnGpu

(

std::string *

error

)

Check if GROMACS has been built with GPU support.

Parameters

[in]

error

Pointer to error string or nullptr.

Todo:

Move this to NB module once it exists.

bool canPerformGpuDetection

(

)

Return whether GPUs can be detected.

Returns true when this is a build of GROMACS configured to support GPU usage, GPU detection is not disabled by an environment variable and a valid device driver, ICD, and/or runtime was detected. Does not throw.

void free_gpu_info

(

const gmx_gpu_info_t *

gpu_info

)

Frees the gpu_dev and dev_use array fields of gpu_info.

Parameters

[in]

gpu_info

pointer to structure holding GPU information

std::vector<int> getCompatibleGpus

(

const gmx_gpu_info_t &

gpu_info

)

Return a container of the detected GPUs that are compatible.

This function filters the result of the detection for compatible GPUs, based on the previously run compatibility tests.

Parameters

[in]

gpu_info

Information detected about GPUs, including compatibility.

Returns

vector of IDs of GPUs already recorded as compatible

const char* getGpuCompatibilityDescription	(	const gmx_gpu_info_t &	gpu_info,
		int	index
	)

Return a string describing how compatible the GPU with given index is.

Parameters

[in]	gpu_info	Information about detected GPUs
[in]	index	index of GPU to ask about

Returns

A null-terminated C string describing the compatibility status, useful for error messages.