Device Memory Access

Functions
hipError_t	hipDeviceCanAccessPeer (int *canAccessPeer, int device, int peerDevice)
	Determine if a device can access a peer's memory. More...
hipError_t	hipDeviceDisablePeerAccess (int peerDevice)
hipError_t	hipDeviceEnablePeerAccess (int peerDevice, unsigned int flags)
hipError_t	hipMemcpyPeer (void *dst, int dstDevice, const void *src, int srcDevice, size_t sizeBytes)
hipError_t	hipMemcpyPeerAsync (void *dst, int dstDevice, const void *src, int srcDevice, size_t sizeBytes, hipStream_t stream=0)

Detailed Description

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Function Documentation

hipError_t hipDeviceCanAccessPeer	(	int *	canAccessPeer,
		int	device,
		int	peerDevice
	)

Determine if a device can access a peer's memory.

Parameters

[out]	canAccessPeer	returns true if specified devices are peers.
[in]	device
[in]	peerDevice	Returns "1" in canAccessPeer if the specified device is capable of directly accessing memory phyically located on peerDevice , or "0" if not.

Warning

HCC returns 0 in *canAccessPeer ; Need to update this function when RT supports P2P

hipError_t hipDeviceDisablePeerAccess

(

int

peerDevice

)

Warning

Need to update this function when RT supports P2P

hipError_t hipDeviceEnablePeerAccess	(	int	peerDevice,
		unsigned int	flags
	)

Warning

Need to update this function when RT supports P2P

hipError_t hipMemcpyPeerAsync	(	void *	dst,
		int	dstDevice,
		const void *	src,
		int	srcDevice,
		size_t	sizeBytes,
		hipStream_t	stream
	)

Bug:

This function uses a synchronous copy