Secret commands that run inside NVIDIA's most guarded software have finally been cracked open with a new technique.
NVIDIA closed-source drivers are a black box that dictates how GPUs process AI workloads. Researchers have now developed a way to intercept and recover the exact command streams sent to the hardware. This breakthrough allows for a deep look into how the driver manages memory and schedules tasks on the GPU. Understanding these proprietary streams is essential for optimizing performance and finding hidden bottlenecks in AI training. It brings a level of transparency to the industry that was previously impossible. We are finally seeing the gears turn inside the world most powerful AI hardware.
Revealing NVIDIA Closed-Source Driver Command Streams for CPU-GPU Runtime Behavior Insight
arXiv · 2604.26889
For NVIDIA GPUs, CUDA is the primary interface through which applications orchestrate GPU execution, yet much of the logic that realizes CUDA operations resides in NVIDIA's closed-source userspace driver. As a result, the translation from high-level CUDA APIs to low-level hardware commands remains opaque, limiting both software understanding and performance attribution.This paper makes that command path visible. We recover the hardware command streams emitted by NVIDIA's closed-source userspace