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Dan Li

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Book Open access Aug 2026

PReCCL: Performant and Resilient Collective Communication via Integrated Inband Telemetry and Workload Reallocation

PReCCL is a drop-in NCCL replacement that combines software inband telemetry with cross-VT workload reallocation, and implements in-band monitoring within the CCL, and precisely measures the stall counts of each VT, and piggybacks the telemetry meta-data on existing collective traffic.

Zhiyong Chen, Kaihui Gao, Li Chen et al. · 0 citations
Book Open access Aug 2026

OptiFlow: Towards LLM-Driven Optimization of Collective Communication Algorithms

OptiFlow is presented, among the first LLM-driven frameworks for automated design of high-performance collective communication algorithms, with key insight is a two-layer decomposition: the LLM generates compact data-movement intent expressed in a domain-specific language, while deterministic scheduling algorithms comp...

Fei Long, Ziyue Yang, Kaihui Gao et al. · 1 citation

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