NVIDIA / NVIDIA/open-gpu-kernel-modules
Watch nvidia-smi causing latency spike
Open
Nobody has claimed this yet.
bug
- Dominant language
- C
- Stars
- 17.4k
- Forks
- 1.9k
- PR merge metrics
- No merged PRs in 30d
Description
NVIDIA Open GPU Kernel Modules Version
580.95.05
Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver.
- I confirm that this does not happen with the proprietary driver package.
Operating System and Version
Ubuntu 25.04
Kernel Release
6.14.0-34-generic UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels.
- I am running on a stable kernel release.
Hardware: GPU
RTX 4070 SUPER
Describe the bug
Watch nvidia-smi causing latency spike
To Reproduce
run this in one terminal
__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia __GL_SYNC_TO_VBLANK=0 glxgears
run this in another
watch -n 0.1 nvidia-smi
Bug Incidence
Always
nvidia-bug-report.log.gz
na
More Info
No response
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 by reproducing the reported latency spike with glxgears in one terminal and watch -n 0.1 nvidia-smi in another on the listed Ubuntu, kernel, and RTX 4070 SUPER setup. Confirm the required proprietary-driver comparison and collect the nvidia-bug-report.log.gz; done means the repeated nvidia-smi polling no longer causes the reported latency spike.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- bash, c, linux, ubuntu
- Domain
- operating-systems, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100