Lumos: Efficient Performance Modeling and Estimation for Large-scale LLM Training
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Abstract (arXiv)
Training LLMs in distributed environments presents significant challenges due to the complexity of model execution, deployment systems, and the vast space of configurable strategies. Although various optimization techniques exist, achieving high efficiency in practice remains difficult. Accurate performance models that effectively characterize and predict a model's behavior are essential for guiding optimization efforts and system-level studies. We propose Lumos, a trace-driven performance modeling and estimation toolkit for large-scale LLM training, designed to accurately capture and predict the execution behaviors of modern LLMs. We evaluate Lumos on a production ML cluster with up to 512 NVIDIA H100 GPUs using various GPT-3 variants, demonstrating that it can replay execution time with an average error of just 3.3%, along with other runtime details, across different models and configurations. Additionally, we validate its ability to estimate performance for new setups from existing traces, facilitating efficient exploration of model and deployment configurations.
Key facts. Cited by 6 papers in the map (data through 7 Oct 2026). Builds on 30 of its 45 references that are in the map. First posted on arXiv 12 Apr 2025.
Builds on
30 of 45 references.
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Built on by
Citing papers per year: 2025: 2; 2026: 4.
6 papers.
- 2025Scalable Synthesis of distributed LLM workloads through Symbolic Tensor Graphscited by 1
- 2025RedunCut: Measurement-Driven Sampling and Accuracy Performance Modeling for Low-Cost Live Video Analyticscited by 0
- 2026MLCommons Chakra: Advancing Performance Benchmarking and Co-design using Standardized Execution Tracescited by 0
- 2026EnergyLens: Predictive Energy-Aware Exploration for Multi-GPU LLM Inference Optimizationcited by 0
- 2026MLSYSIM: First-Principles Infrastructure Modeling for Machine Learning Systemscited by 0
- 2026The Life of a Token: from Words to Bits on the Wirecited by 0
- 2026The Life of a Token: from Words to Bits on the Wire17 Sep 2026
- 2026MLSYSIM: First-Principles Infrastructure Modeling for Machine Learning Systems28 Jun 2026
- 2026EnergyLens: Predictive Energy-Aware Exploration for Multi-GPU LLM Inference Optimization14 May 2026
- 2026MLCommons Chakra: Advancing Performance Benchmarking and Co-design using Standardized Execution Traces11 May 2026
- 2025RedunCut: Measurement-Driven Sampling and Accuracy Performance Modeling for Low-Cost Live Video Analytics30 Dec 2025
- 2025Scalable Synthesis of distributed LLM workloads through Symbolic Tensor Graphs13 Nov 2025