Exam NCP-AII Topic 1 Question 60 Discussion

Actual exam question for NVIDIA's NCP-AII exam
Question #: 60
Topic #: 1

Consider a scenario where you're using GPUDirect Storage to enable direct memory access between GPUs and NVMe drives. You observe that while GPUDirect Storage is enabled, you're not seeing the expected performance gains. What are potential reasons and configurations you should check to ensure optimal GPUDirect Storage performance? Select all that apply.

A. Verify that the NVMe drives are properly configured in a RAID 0 configuration. B. Ensure that the NVMe drives are connected to the system via PCle Gen4 or Gen5. C. Confirm that the CUDA driver version is compatible with GPIJDirect Storage. D. Check if the file system supports direct I/O (e.g., using 'directio' mount option). E. Disable CPU-side caching to force all I/O operations to go directly to the GPU memory.

Suggested Answer: B,C,D Vote an answer

Explanation:GPUDirect Storage requires PCle Gen4/Gen5 for sufficient bandwidth (B). The CUDA driver must be compatible with GPUDirect Storage (C). Direct I/O support in the file system is essential to bypass the OS cache and allow direct GPU access (D). RAID 0 (A) is about storage speed but not directly related to GDS functionality. Disabling CPU-side caching (E) is usually detrimental as it can reduce overall system performance. Note, this is not always bad but needs to be tested depending on application.

by Anastasia at Feb 24, 2026, 10:22 PM

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