FULL ASYNCHRONOUS EXECUTION QUEUE FOR ACCELERATOR HARDWARE

VEDA: Best practices to use hybrid programming on the NEC SX-Aurora TSUBASA

The Vector Engine Driver API (VEDA) was developed to enable easy porting of existing CUDA applications to NEC’s SX-Aurora TSUBASA. While the API enables a smooth transition between the different architectures, there are unique features that require special attention, to achieve optimal performance.

In this article we present multiple methods to improve your code. First, we explain how to use C++ function overloading and templates. Second, we show how to make best use of the unique features of VEDAdeviceptrs. Third, we explain our improvements for VEDA’s memset and memcopy operations, that can also improve your own code.

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AVEO-VEDA: Hybrid Programming for the NEC Vector Engine

Hybrid programming is a state of the art method for incorporating compute accelerators such as GPUs or vector processors into applications that run on a host system. The main reason for hybrid programming is that compute accelerators are well suited for compute and memory heavy tasks but perform poorly in control flow dominated code sections. Therefore latter are usually executed on CPUs while the compute heavy parts are offloaded to accelerators. This article introduces the low-level AVEO and high-level VEDA programming APIs for programming the NEC SX-Aurora TSUBASA, also called Vector Engine (VE).

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