Questions tagged [gpudirect]

Tag for NVIDIA GPUDirect

Using GPUDirect, multiple GPUs, third party network adapters, solid-state drives (SSDs) and other devices can directly read and write CUDA host and device memory, eliminating unnecessary memory copies, dramatically lowering CPU overhead, and reducing latency, resulting in significant performance improvements in data transfer times for applications running on NVIDIA Tesla™ and Quadro™ products.

Resources:

  1. NVIDIA GPUDirect
  2. Documentation
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cuda-mpi programming model without GPUDirect

I am using a GPU cluster without GPUDirect support. From this briefing, the following is done when transferring GPU data across nodes: GPU writes to pinned sysmem1 CPU copies from sysmem1 to sysmem2 Infiniband driver copies from sysmem2 Now I am…
Hailiang Zhang
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