unal.od.jdiffraction.gpu.utils

Class CUDAUtils

java.lang.Object

unal.od.jdiffraction.gpu.utils.CUDAUtils

public class CUDAUtils
extends java.lang.Object

JCuda Utilities class. Some functions were taken from JCuda examples.

Since:

JDiffraction 1.2

Author:

Pablo Piedrahita-Quintero (jppiedrahitaq@unal.edu.co), Carlos Trujillo (catrujila@unal.edu.co), Jorge Garcia-Sucerquia (jigarcia@unal.edu.co)

Method Summary

Modifier and Type	Method and Description
jcuda.driver.CUcontext	getContext(jcuda.driver.CUdevice device) Returns the context for device.
jcuda.driver.CUdevice	getDevice(int ordinal) Returns the device assigned to ordinal.
static CUDAUtils	getInstance() Returns the current instance of CUDAUtils.
int	getMaxThreads(jcuda.driver.CUdevice device) Returns the maximum number of threads per block for device.
void	initCUDA() Initialize the CUDA driver API.
static java.lang.String	preparePtxFile(java.lang.String cuFileName) The extension of the given file name is replaced with "ptx".

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static CUDAUtils getInstance()

Returns the current instance of CUDAUtils. If the current instance is null, a new instance is created.

Returns:

instance of CUDAUtils

initCUDA

public void initCUDA()

Initialize the CUDA driver API.

getDevice

public jcuda.driver.CUdevice getDevice(int ordinal)

Returns the device assigned to ordinal.

Parameters:

ordinal -

Returns:

device

getContext

public jcuda.driver.CUcontext getContext(jcuda.driver.CUdevice device)

Returns the context for device. If the current context is null, a new CUcontext is created.

Parameters:

device -

Returns:

context

getMaxThreads

public int getMaxThreads(jcuda.driver.CUdevice device)

Returns the maximum number of threads per block for device.

Parameters:

device -

Returns:

maximum number of threads

preparePtxFile

public static java.lang.String preparePtxFile(java.lang.String cuFileName)
                                       throws java.io.IOException

The extension of the given file name is replaced with "ptx". If the file with the resulting name does not exist, it is compiled from the given file using NVCC. The name of the PTX file is returned.

Parameters:

cuFileName - The name of the .CU file

Returns:

The name of the PTX file

Throws:

java.io.IOException - If an I/O error occurs