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FastMoE: A Fast Mixture-of-Expert Training System

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arxiv 2103.13262 v1 pith:HCIUEKOC submitted 2021-03-24 cs.LG cs.CLcs.DC

FastMoE: A Fast Mixture-of-Expert Training System

classification cs.LG cs.CLcs.DC
keywords systemfastmoetrainingdifferentpytorchavailabledistributedenlarging
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Mixture-of-Expert (MoE) presents a strong potential in enlarging the size of language model to trillions of parameters. However, training trillion-scale MoE requires algorithm and system co-design for a well-tuned high performance distributed training system. Unfortunately, the only existing platform that meets the requirements strongly depends on Google's hardware (TPU) and software (Mesh Tensorflow) stack, and is not open and available to the public, especially GPU and PyTorch communities. In this paper, we present FastMoE, a distributed MoE training system based on PyTorch with common accelerators. The system provides a hierarchical interface for both flexible model design and easy adaption to different applications, such as Transformer-XL and Megatron-LM. Different from direct implementation of MoE models using PyTorch, the training speed is highly optimized in FastMoE by sophisticated high-performance acceleration skills. The system supports placing different experts on multiple GPUs across multiple nodes, enabling enlarging the number of experts linearly against the number of GPUs. The source of FastMoE is available at https://github.com/laekov/fastmoe under Apache-2 license.

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Forward citations

Cited by 22 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    BrainFIBRE pretrains a five-expert Mixture-of-Experts model on NODDI-derived microstructural maps and outperforms prior deep models on age, sex, cerebrovascular, neurodegenerative, and cognitive prediction.

  2. Language-Assisted Super-Resolution from Real-World Low-Resolution Patches

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    LA-SR redefines unpaired super-resolution in language space by projecting images into a semantically rich representation and applying vision-language model guided losses to handle real-world degradations extracted fro...

  3. ViBE: Co-Optimizing Workload Skew and Hardware Variability for MoE Serving

    cs.DC 2026-05 unverdicted novelty 7.0

    ViBE co-optimizes expert placement with measured GPU performance variability in MoE inference to cut execution-time imbalance, delivering 14% better SLO attainment and up to 45% lower P90 TTFT.

  4. MoE-Prefill: Zero Redundancy Overheads in MoE Prefill Serving

    cs.LG 2026-05 unverdicted novelty 7.0

    MoE-Prefill achieves 1.35-1.59x higher throughput for prefill-only MoE serving by using asynchronous expert parallelism to overlap weight AllGather with computation and prefix-aware routing with true-FLOPs tracking.

  5. From Tensor Buffer to Distributed Memory Hierarchy: A Survey of KV Cache Management for LLM Serving

    cs.DC 2026-06 accept novelty 6.5

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  6. Relax Within, Balance Across: Geometry-Guided Load Balancing for Vision-Language Mixture-of-Experts

    cs.CV 2026-08 accept novelty 6.0

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  7. On the Design of Mixture-of-Experts for Dynamic Gaussian Splatting

    cs.CV 2026-07 accept novelty 6.0

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  8. On the Design of Mixture-of-Experts for Dynamic Gaussian Splatting

    cs.CV 2026-07 accept novelty 6.0

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  10. Fast MoE Inference via Predictive Prefetching and Expert Replication

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  11. Hierarchical Mixture-of-Experts with Two-Stage Optimization

    cs.LG 2026-05 unverdicted novelty 6.0

    Hi-MoE uses two-level hierarchical routing objectives to enforce group-level balance while promoting within-group specialization, yielding better perplexity and expert utilization than prior MoE baselines in NLP and v...

  12. MoE-Prefill: Zero Redundancy Overheads in MoE Prefill Serving

    cs.LG 2026-05 unverdicted novelty 6.0

    ZeRO-Prefill achieves 1.35-1.59x higher throughput for MoE prefill serving by replacing per-layer activation AllToAll with overlapped asynchronous weight AllGather and prefix-aware routing.

  13. AGoQ: Activation and Gradient Quantization for Memory-Efficient Distributed Training of LLMs

    cs.CL 2026-05 unverdicted novelty 6.0

    AGoQ delivers up to 52% lower memory use and 1.34x faster training for 8B-32B LLaMA models by using near-4-bit adaptive activations and 8-bit gradients while preserving pretraining convergence and downstream accuracy.

  14. TabICL: A Tabular Foundation Model for In-Context Learning on Large Data

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  16. BrainFIBRE: A Foundation Model via Information Decomposition for Brain Microstructure

    cs.CV 2026-07 unverdicted novelty 5.0

    BrainFIBRE presents a foundation model for brain microstructure that applies self-supervised partial information decomposition on NODDI maps to disentangle unique, synergistic, and redundant information and reports st...

  17. Language-Assisted Super-Resolution from Real-World Low-Resolution Patches

    cs.CV 2026-06 unverdicted novelty 5.0

    LA-SR extracts real LR patches from depth-varying regions in single images and uses vision-language models with linguistic content and quality losses for unpaired super-resolution.

  18. AGoQ: Activation and Gradient Quantization for Memory-Efficient Distributed Training of LLMs

    cs.CL 2026-05 unverdicted novelty 5.0

    AGoQ cuts LLM training memory by up to 52% and speeds it up by 1.34x using tailored 4-bit activations and 8-bit gradients with special communication, matching baseline accuracy on LLaMA models.

  19. EMO: Frustratingly Easy Progressive Training of Extendable MoE

    cs.LG 2026-05 unverdicted novelty 4.0

    EMO progressively expands the expert pool in MoE models using scaling-law-derived token budgets per stage, matching fixed-expert performance while cutting wall-clock time and GPU cost.

  20. From System 1 to System 2: A Survey of Reasoning Large Language Models

    cs.AI 2025-02 accept novelty 3.0

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  21. A Survey of Large Language Models

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  22. A Comprehensive Overview of Large Language Models

    cs.CL 2023-07 unverdicted novelty 2.0

    A survey paper providing an overview of Large Language Models, their background, and recent advances in the field.