Paper analyzes NVSHMEM: System-level insights into GPU communication
thoefler · x · 2026-08-28
This arXiv paper, 'Demystifying NVSHMEM,' provides a system-level analysis of NVIDIA's PGAS communication library. Key topics include:
- Overview of communication libraries and NVSHMEM architecture
- Internal mechanisms of memory allocation
- Inter-node and intra-node communication paths and selection logic
- Breakdown of collective communication APIs
- Microbenchmark results
- Case study on DeepEP performance
The study highlights how NVSHMEM's device-side symmetric memory model enables fine-grained GPU-driven communication and identifies design tradeoffs for improving GPU communication runtimes.
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