Overview

The DataCopy APIs provide comprehensive data transfer capabilities. They support various data transfer scenarios, and can perform on-the-fly format conversion, quantization, and activation during data movement. These APIs enable data transfer between local memory and global memory, as well as data transfer within local memory.

The following table lists DataCopy functions and their support for each transfer path.

Function	Description	Local Memory -> Global Memory	Global Memory -> Local Memory	Local Memory -> Local Memory
Basic data transfer	Provides basic data transfer capabilities. The original format and content of data remain unchanged during transfer. Both continuous and discontinuous data transfer are supported.	√	√	√
Enhanced data transfer	Enhances the data transfer capability. Compared with basic data transfer APIs, the enhanced data transfer API adds on-the-fly computation over the CO1->CO2 path.	√	√	√
Slice data transfer	Supports slice data transfer, which extracts subsets of multi-dimensional tensor data for transfer.	√	√	×
On-the-fly ND2NZ transfer	Supports ND-to-NZ format conversion during data transfer.	×	√	√
On-the-fly NZ2ND transfer	Supports NZ-to-ND format conversion during data transfer.	√	×	×
On-the-fly quantization and activation transfer	Supports quantization and ReLU activation during data transfer, as well as NZ-to-ND format conversion on the path from local memory to global memory.	√	×	√

Parent topic: DataCopy