Journal
NEUROMORPHIC COMPUTING AND ENGINEERING
Volume 1, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/2634-4386/abf150
Keywords
SpiNNaker; MAC array; Loihi; neuromorphic computing; adaptive robotic control; keyword spotting
Funding
- European Union
- EU [604102, 720270]
- Intel Corporation
- Canada Research Chairs Program
- Natural Sciences and Engineering Research Council of Canada (NSERC) [785907]
- National Research Council Canada (NRCC) at the University of Waterloo
- [261453]
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The study implemented two benchmark tasks on SpiNNaker 2 and Loihi neuromorphic chips, and found that the application of MAC array on SpiNNaker 2 showed better efficiency in handling high-dimensional vector-matrix multiplication.
We implemented two neural network based benchmark tasks on a prototype chip of the second-generation SpiNNaker (SpiNNaker 2) neuromorphic system: keyword spotting and adaptive robotic control. Keyword spotting is commonly used in smart speakers to listen for wake words, and adaptive control is used in robotic applications to adapt to unknown dynamics in an online fashion. We highlight the benefit of a multiply-accumulate (MAC) array in the SpiNNaker 2 prototype which is ordinarily used in rate-based machine learning networks when employed in a neuromorphic, spiking context. In addition, the same benchmark tasks have been implemented on the Loihi neuromorphic chip, giving a side-by-side comparison regarding power consumption and computation time. While Loihi shows better efficiency when less complicated vector-matrix multiplication is involved, with the MAC array, the SpiNNaker 2 prototype shows better efficiency when high dimensional vector-matrix multiplication is involved.
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