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The paper tackles a concrete problem for analog compute-in-memory hardware: hardware noise distorts Transformer attention, and existing noise-aware training mainly fixes final outputs. ABNAT adds a teacher-student objective that preserves each head's attention patterns, reporting gains of up to 11.28% in noise-degraded accuracy and up to 85.77% lower attention deviation, though these are best-case figures across tested vision, language, and multimodal models. For readers, the takeaway is that robustness to analog hardware may require supervising internal attention behavior, not just output accuracy, and that the approach needs no hardware changes or inference overhead.
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ABNAT: Attention-Based Noise-Aware Training for Robust Transformers on Analog Compute-in-Memory Systems

arXiv3 min read

arXiv:2610.22065v1 Announce Type: new Abstract: Transformer-based models have become the backbone of a wide range of tasks, but their intensive computation and data movement incur substantial energy overhead. Analog compute-in-memory (CIM) offers an energy-efficient alternative, yet its inherent hardware non-idealities perturb stored weights and can significantly degrade model performance. Although existing noise-aware training (NAT) methods improve robustness by injecting noise during training, they largely overlook the critical role of attention mechanisms in Transformer inference.To bridge this gap, we analyze how CIM-induced noise reshapes attention in Transformers and identify two key observations: (1) the divergence between clean and noisy attention maps increases substantially in deeper layers, and (2) conventional NAT can remain overconfident even when its attention routes deviate markedly from the clean reference. Motivated by these findings, we propose ABNAT, an attention-based noise-aware training framework that teaches the noisy student to preserve the clean teacher's headwise attention routes rather than merely reproduce answers, without hardware changes or inference overhead; selective variants further reduce training cost.Extensive experiments across vision, language, and multimodal Transformers show that ABNAT consistently improves robustness over corresponding NAT baselines, improving noise-degraded accuracy by up to 11.28% and reducing attention deviation by up to 85.77%.

Abstract:Transformer-based models have become the backbone of a wide range of tasks, but their intensive computation and data movement incur substantial energy overhead. Analog compute-in-memory (CIM) offers an energy-efficient alternative, yet its inherent hardware non-idealities perturb stored weights and can significantly degrade model performance. Although existing noise-aware training (NAT) methods improve robustness by injecting noise during training, they largely overlook the critical role of attention mechanisms in Transformer this http URL bridge this gap, we analyze how CIM-induced noise reshapes attention in Transformers and identify two key observations: (1) the divergence between clean and noisy attention maps increases substantially in deeper layers, and (2) conventional NAT can remain overconfident even when its attention routes deviate markedly from the clean reference. Motivated by these findings, we propose ABNAT, an attention-based noise-aware training framework that teaches the noisy student to preserve the clean teacher's headwise attention routes rather than merely reproduce answers, without hardware changes or inference overhead; selective variants further reduce training this http URL experiments across vision, language, and multimodal Transformers show that ABNAT consistently improves robustness over corresponding NAT baselines, improving noise-degraded accuracy by up to 11.28% and reducing attention deviation by up to 85.77%.

8 pages, 10 figures, 2 tables. Accepted for publication at the 32nd Asia and South Pacific Design Automation Conference (ASP-DAC 2027)

Machine Learning (cs.LG)

arXiv:2610.22065 [cs.LG]

(or arXiv:2610.22065v1 [cs.LG] for this version)

https://doi.org/10.48550/arXiv.2610.22065 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

https://doi.org/10.1145/3840404.3848194 Focus to learn more DOI(s) linking to related resources

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Full text under the publisher's open licence · 321 words

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