|Towards Hardware Support for Common Sensor Processing Tasks
|Gupte, A., and P. Jones
|Proceedings of the International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA)
Sensor processing is a common task within many embedded system domains, such as in control systems sensor feedback used for actuator control, etc. In this paper we have surveyed several embedded system domains, and extracted kernels of computation that are common across applications within a given domain, or across domains. We have shown that adding architectural support for executing these common kernels of computation can yield an overall better system performance. We present a light weight, simpliﬁed prototype of a Sensor Processing Unit (SPU) that ofﬂoads these computations from the main Arithmetic Logic Unit (ALU) of an embedded processor, and that accesses sensor data in a low latency manner. Our SPU prototype shows an average speed up factor of 2.48 over executing these kernels on an embedded PowerPC processor. A large portion of this speed up is due to our low latency method for accessing sensor data. Isolating our speed up to purely computation still shows an average speed up factor of 1.38 for these kernels.