mulgpu training error about ultralytics

[glenn-jocher]

Hello @jo-dean,

Thank you for reaching out and providing detailed information about your issue. It looks like you're encountering a problem with multi-GPU training where the validation results are incorrect when using both GPUs, but correct when using a single GPU.

To assist you better, could you please provide a minimal reproducible example? This will help us replicate the issue on our end and investigate it further. You can find guidelines for creating a minimal reproducible example here. Ensuring that we can reproduce the bug is crucial for us to identify and resolve the issue effectively.

Additionally, please verify that you are using the latest versions of torch and ultralytics. You can upgrade your packages using the following commands:

pip install --upgrade torch
pip install --upgrade ultralytics

Once you've confirmed that you're on the latest versions, please try running your training script again to see if the issue persists.

If the problem continues, please share the minimal reproducible code example along with any additional logs or error messages you encounter. This will greatly aid in diagnosing the problem.

Looking forward to your response!