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GAC: Stabilizing Asynchronous RL Training for LLMs via Gradient Alignment Control
๐คAI Summary
Researchers propose GAC (Gradient Alignment Control), a new method to stabilize asynchronous reinforcement learning training for large language models. The technique addresses training instability issues that arise when scaling RL to modern AI workloads by regulating gradient alignment and preventing overshooting.
Key Takeaways
- โAsynchronous RL training can cause severe instability in large language model optimization despite being essential for scaling.
- โThe instability manifests as persistently high cosine similarity between consecutive policy gradients, unlike stable synchronized training.
- โGAC uses gradient projection to regulate training progress along stale-aligned directions and prevent divergence.
- โThe method provides convergence guarantees under bounded staleness conditions.
- โEmpirical results show GAC recovers stable training dynamics matching synchronized baselines even at high staleness levels.
#reinforcement-learning#large-language-models#training-optimization#gradient-alignment#asynchronous-training#ai-scaling#llm-training#research
Read Original โvia arXiv โ CS AI
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