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Mitigating the Impact of Outlier Channels for Language Model Quantization with Activation Regularization
April 5, 2024, 4:42 a.m. | Aniruddha Nrusimha, Mayank Mishra, Naigang Wang, Dan Alistarh, Rameswar Panda, Yoon Kim
cs.LG updates on arXiv.org arxiv.org
Abstract: We consider the problem of accurate quantization for language models, where both the weights and activations are uniformly quantized to 4 bits per parameter, the lowest bitwidth format natively supported by GPU hardware. In this context, the key challenge is activation quantization: it is known that language models contain outlier channels whose values on average are orders of magnitude higher than than other channels, which prevents accurate low-bitwidth quantization with known techniques. We systematically study …
abstract arxiv challenge channels context cs.cl cs.lg format gpu hardware impact key language language model language models outlier per quantization regularization the key type
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