NanoLM: An Affordable LLM Study Benchmark via Accurate Loss Prediction Across Scales

siqi fan, Xiusheng Huang, Xuezhi Fang, Yiqun Yao, Xiang Li, Ziyi Ni, Xin Jiang, Xuying Meng, Peng Han, Shuo Shang, Kang Liu, Aixin Sun, Yequan Wang

Primary Area: datasets and benchmarks

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Keywords: Large Language Model, Scaling Law, Hyperparameter Transfer, Hyperparameter Tuning

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Abstract:

High computational cost, data collection, and difficulty in distributed training are the three significant barriers in pre-training large language models (LLMs) for many researchers.
In this paper, we try to solve the question ''Under constrained computational resources, what type of model design(eg. model size, model architecture) should I train in order to to achieve the best possible performance?" To answer this question, based on Scaling Laws for LLM, we introduce nanoLM: an affordable LLM Study Benchmark via Accurate Loss Prediction across scales. This benchmark unlocks a new LLM study paradigm without direct training. Under the loss basin area, the training loss and model size can be accurately fitted as a power law. This allows us to extrapolate LM from small- to large-scale. For example, with just 13.1%, 14.2% of the total pretraining cost, we can accurately forecast the loss for models sized 26B and 52B. To ensure compatibility with mainstream Transformer architectures, nanoLM offers support for decoder-only structures (eg., GPT), encoder-only structures (eg., BERT), and encoder-decoder structures (eg., T5). Considering that excessive model parameters might lead to GPU memory overflow, nanoLM also supports for data parallelism strategies. Our goal with nanoLM is to empower researchers to make cheap and meaningful comparisons of varying model designs at large scales. We also aspire for our benchmark to serve as a bridge between the academic community and the industry.

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Submission Number: 4735