VoltGrid AI: Mitigating GPU cluster dI/dt power surges in software
10 hours ago
- Distributed deep learning clusters using BSP cause severe dI/dt transients due to synchronous AllReduce, leading to current collapse and voltage droop.
- VoltGrid is a zero-overhead C++/CUDA interposition engine that eliminates synchronized inductive cliffs via microsecond-scale rank phase cascading without modifying application code.
- Empirical results on a 4x RTX 4090 cluster show 97.52% reduction in instantaneous dI/dt power step shock, 100% compute throughput, and less than 0.05% latency impact.