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Open AccessProceedings ArticleDOI

In-Datacenter Performance Analysis of a Tensor Processing Unit

TLDR
The Tensor Processing Unit (TPU) as discussed by the authors is a custom ASIC deployed in datacenters since 2015 that accelerates the inference phase of neural networks (NN) using a 65,536 8-bit MAC matrix multiply unit that offers a peak throughput of 92 TeraOps/second (TOPS).
Abstract
Many architects believe that major improvements in cost-energy-performance must now come from domain-specific hardware. This paper evaluates a custom ASIC---called a Tensor Processing Unit (TPU) --- deployed in datacenters since 2015 that accelerates the inference phase of neural networks (NN). The heart of the TPU is a 65,536 8-bit MAC matrix multiply unit that offers a peak throughput of 92 TeraOps/second (TOPS) and a large (28 MiB) software-managed on-chip memory. The TPU's deterministic execution model is a better match to the 99th-percentile response-time requirement of our NN applications than are the time-varying optimizations of CPUs and GPUs that help average throughput more than guaranteed latency. The lack of such features helps explain why, despite having myriad MACs and a big memory, the TPU is relatively small and low power. We compare the TPU to a server-class Intel Haswell CPU and an Nvidia K80 GPU, which are contemporaries deployed in the same datacenters. Our workload, written in the high-level TensorFlow framework, uses production NN applications (MLPs, CNNs, and LSTMs) that represent 95% of our datacenters' NN inference demand. Despite low utilization for some applications, the TPU is on average about 15X -- 30X faster than its contemporary GPU or CPU, with TOPS/Watt about 30X -- 80X higher. Moreover, using the CPU's GDDR5 memory in the TPU would triple achieved TOPS and raise TOPS/Watt to nearly 70X the GPU and 200X the CPU.

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Proceedings ArticleDOI

SARA: scaling a reconfigurable dataflow accelerator

TL;DR: SARA as mentioned in this paper is a compiler that employs a novel mapping strategy to efficiently utilize large-scale Reconfigurable Dataflow Accelerators (RDAs) by spatially mapping a program onto RDA's distributed resources.
Proceedings ArticleDOI

Hu-Fu: Hardware and Software Collaborative Attack Framework Against Neural Networks

TL;DR: Huang et al. as discussed by the authors proposed a hardware-software collaborative attack framework to inject hidden neural network Trojans, which works as a backdoor without requiring manipulating input images and is flexible for different scenarios.
Proceedings ArticleDOI

LightBulb: a photonic-nonvolatile-memory-based accelerator for binarized convolutional neural networks

TL;DR: A photonic nonvolatile memory (NVM)-based accelerator, LightBulb, is proposed to process binarized CNNs by high frequency photonic XNOR gates and popcount units and adopts photonic racetrack memory to serve as input/output registers to achieve high operating frequency.
Proceedings ArticleDOI

Security analysis and enhancement of model compressed deep learning systems under adversarial attacks

TL;DR: This work investigates the multi-factor adversarial attack problem in practical model optimized deep learning systems by jointly considering the DNN model-reshaping and the input perturbations and conducts a comprehensive robustness and vulnerability analysis of deep compressed DNN models under derived adversarial attacks.
Journal ArticleDOI

SNAP: An Efficient Sparse Neural Acceleration Processor for Unstructured Sparse Deep Neural Network Inference

TL;DR: SNAP as discussed by the authors uses parallel associative search to discover valid weight (W) and input activation (IA) pairs from compressed, unstructured, sparse W and IA data arrays, which allows SNAP to maintain a 75% average compute utilization.
References
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