Multi-objective Differentiable Neural Architecture Search
CoRR(2024)
Abstract
Pareto front profiling in multi-objective optimization (MOO), i.e. finding a
diverse set of Pareto optimal solutions, is challenging, especially with
expensive objectives like neural network training. Typically, in MOO neural
architecture search (NAS), we aim to balance performance and hardware metrics
across devices. Prior NAS approaches simplify this task by incorporating
hardware constraints into the objective function, but profiling the Pareto
front necessitates a search for each constraint. In this work, we propose a
novel NAS algorithm that encodes user preferences for the trade-off between
performance and hardware metrics, and yields representative and diverse
architectures across multiple devices in just one search run. To this end, we
parameterize the joint architectural distribution across devices and multiple
objectives via a hypernetwork that can be conditioned on hardware features and
preference vectors, enabling zero-shot transferability to new devices.
Extensive experiments with up to 19 hardware devices and 3 objectives showcase
the effectiveness and scalability of our method. Finally, we show that, without
additional costs, our method outperforms existing MOO NAS methods across
qualitatively different search spaces and datasets, including MobileNetV3 on
ImageNet-1k and a Transformer space on machine translation.
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