Relay Buffer Independent Communication over Pooled HBM for Efficient MoE Inference on Ascend
Mixture-of-Experts (MoE) inference requires large-scale token exchange across devices, making dispatch and combine major bottlenecks in both prefill and decode. Beyond network transfer, routing-driven layout transformation, temporary relay, and output restoration can add substantial overhead. Existing MoE communication paths are often buffer-centric, using explicit inter-process relay and reordering buffers around collective transfer. This report presents a relay-buffer-free communication design for MoE inference acceleration on Ascend systems. The design reorganizes dispatch and combine around direct placement into destination expert windows and direct reading from remote expert windows....
| Authors | Tianlun Hu, Tiancheng Hu, Shengsheng Litang et al. |
|---|---|
| Primary category | cs.DC |
| Published | 7 May 2026 |
| Last updated at source | 8 May 2026 |
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