aclrtMemcpy

Copies memory.

This API copies the memory immediately. No implicit device synchronization or stream synchronization is performed within the function.
To perform inter-device memory copy, call the aclrtDeviceCanAccessPeer API to query whether inter-device memory copy is supported, call the aclrtDeviceEnablePeerAccess API to enable inter-device memory copy, and then call this API to perform memory copy.
This restriction applies to the following models:

Atlas Training Series Product

aclError aclrtMemcpy(void *dst, size_t destMax, const void *src, size_t count, aclrtMemcpyKind kind)

Parameter	Input/Output	Description
dst	Input	Pointer to the destination memory address.
destMax	Input	Memory size in bytes in the destination address.
src	Input	Pointer to the source memory address.
count	Input	Size in bytes to copy.
kind	Input	Memory copy kind, reserved. If the configured enum value is invalid, the system determines whether to copy data from the source address to the destination address based on the source and destination memory address pointers. If no, the system returns an error message. typedef enum aclrtMemcpyKind { ACL_MEMCPY_HOST_TO_HOST, / /Memory copy within the host ACL_MEMCPY_HOST_TO_DEVICE, // Memory copy from host to device ACL_MEMCPY_DEVICE_TO_HOST, // Memory copy from device to host ACL_MEMCPY_DEVICE_TO_DEVICE //Memory copy within a device or between devices ACL_MEMCPY_DEFAULT, // The system determines the copy direction based on the source and destination memory addresses. } aclrtMemcpyKind;

The value 0 indicates success, and other values indicate failure. For details, see aclError.