TrIM: Triangular Input Movement Systolic Array for Convolutional Neural Networks -- Part II: Architecture and Hardware Implementation

• URL: http://arxiv.org/abs/2408.10243v1
• Date: Mon, 5 Aug 2024 10:18:00 GMT
• Title: TrIM: Triangular Input Movement Systolic Array for Convolutional Neural Networks -- Part II: Architecture and Hardware Implementation
• Authors: Cristian Sestito, Shady Agwa, Themis Prodromakis,
• Abstract summary: TrIM is an innovative dataflow based on a triangular movement of inputs. TrIM can reduce the number of memory accesses by one order of magnitude when compared to state-of-the-art systolic arrays. architecture achieves a peak throughput of 453.6 Giga Operations per Second.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Modern hardware architectures for Convolutional Neural Networks (CNNs), other than targeting high performance, aim at dissipating limited energy. Reducing the data movement cost between the computing cores and the memory is a way to mitigate the energy consumption. Systolic arrays are suitable architectures to achieve this objective: they use multiple processing elements that communicate each other to maximize data utilization, based on proper dataflows like the weight stationary and row stationary. Motivated by this, we have proposed TrIM, an innovative dataflow based on a triangular movement of inputs, and capable to reduce the number of memory accesses by one order of magnitude when compared to state-of-the-art systolic arrays. In this paper, we present a TrIM-based hardware architecture for CNNs. As a showcase, the accelerator is implemented onto a Field Programmable Gate Array (FPGA) to execute the VGG-16 CNN. The architecture achieves a peak throughput of 453.6 Giga Operations per Second, outperforming a state-of-the-art row stationary systolic array by ~5.1x in terms of memory accesses, and being up to ~12.2x more energy-efficient than other FPGA accelerators.

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