Function: get_memcpy_desc_size

Product	Supported (√/x)
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas training products	x
Atlas inference products	x
Atlas 200I/500 A2 inference products	√

Obtains the memory size used by the memory copy descriptor of the current device.

This API must be used together with other key APIs to implement memory copy. For details, see acl.rt.memcpy_async_with_desc.

C Prototype

aclError aclrtGetMemcpyDescSize(aclrtMemcpyKind kind, size_t *descSize)

Python Function

desc_size, ret = acl.rt.get_memcpy_desc_size(kind)

Parameter	Description
kind	Int, memory copy type. Currently, only ACL_MEMCPY_INNER_DEVICE_TO_DEVICE is supported, indicating memory copy within a device.

Return Value	Description
desc_size	Int, memory size, in bytes.
ret	Int, error code: 0 on success; else, failure.

Parent topic: Memory Management