p2pBandwidthLatencyTest
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- C++
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Description
Seeing the following on a 4xH100-80GB system
bidirectional
GPU0-GPU0 = 2959.19 GB/s
GPU0-GPU1 = 260.89 (GB/s)
The spec says GPU0-GPU1 NVlink bandwidth is 300 GB/s. Is it possible to close the gap ?
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the p2pBandwidthLatencyTest sample and reproduce the bidirectional results on the reported 4xH100-80GB system. Compare GPU0-GPU0 and GPU0-GPU1 measurements with the stated NVLink specification, then document whether the gap is expected or identify the sample or setup behavior that requires correction.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100