Package org.apache.sysds.runtime.instructions.gpu.context

Class CudaMemoryAllocator

java.lang.Object

org.apache.sysds.runtime.instructions.gpu.context.CudaMemoryAllocator

All Implemented Interfaces:

GPUMemoryAllocator

public class CudaMemoryAllocator
extends Object
implements GPUMemoryAllocator

Constructor Summary

Constructors

Constructor	Description
CudaMemoryAllocator()

Method Summary

Modifier and Type	Method	Description
void	allocate(jcuda.Pointer devPtr, long size)	Allocate memory on the device.
boolean	canAllocate(long size)	Check if there is enough memory to allocate a pointer of given size
void	free(jcuda.Pointer devPtr)	Frees memory on the device
long	getAvailableMemory()	Gets the available memory on GPU that SystemDS can use.
static void	resetUnusableFreeMemory()

Methods inherited from class java.lang.Object

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

Constructor Details

CudaMemoryAllocator

public CudaMemoryAllocator()

Method Details

allocate

public void allocate(jcuda.Pointer devPtr,
 long size)

Allocate memory on the device.

Specified by:

allocate in interface GPUMemoryAllocator

Parameters:

devPtr - Pointer to allocated device memory

size - size in bytes

Throws:

jcuda.CudaException - if unable to allocate

free

public void free(jcuda.Pointer devPtr)
          throws jcuda.CudaException

Frees memory on the device

Specified by:

free in interface GPUMemoryAllocator

Parameters:

devPtr - Device pointer to memory to free

Throws:

jcuda.CudaException - if error occurs

canAllocate

public boolean canAllocate(long size)

Check if there is enough memory to allocate a pointer of given size

Specified by:

canAllocate in interface GPUMemoryAllocator

Parameters:

size - size in bytes

Returns:

true if there is enough available memory to allocate a pointer of the given size

getAvailableMemory

public long getAvailableMemory()

Gets the available memory on GPU that SystemDS can use.

Specified by:

getAvailableMemory in interface GPUMemoryAllocator

Returns:

the available memory in bytes

resetUnusableFreeMemory

public static void resetUnusableFreeMemory()