kohya-ss / kohya-ss/sd-scripts

Using Mulit-GPU in windows system with NCCL error

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Description

How to use more GPUs for training under Windows? When clicking enable multi-GPU and setting up 2 GPU processes, it always shows nccl error. But when I searched for nccl, there was no Windows system version. I have two GPU card. 2080ti 22G and V100 16G. Both cards can work when used alone. But if you want to use it simultaneously, the following error message will appear.
![QQ截图20240403170629](https://github.com/bmaltais/kohya_ss/assets/70052345/6097c3ac-e335-40af-af1f-8d0635c6d682)
![QQ截图20240403170646](https://github.com/bmaltais/kohya_ss/assets/70052345/3e109962-fea0-4fbc-a57d-db1d38620024)
![QQ截图20240403170704](https://github.com/bmaltais/kohya_ss/assets/70052345/01f50bf0-50e8-4857-ade1-51851ff733fd)
![QQ截图20240403170734](https://github.com/bmaltais/kohya_ss/assets/70052345/c7e86adb-34e7-456d-b38d-90864c2066b2)

Contributor guide

No contributing guide indexed for this repository

Research direction

No repository file, test, or entry point is identified in the issue. Start by reproducing multi-GPU training on Windows with the two listed GPUs and inspect the reported NCCL errors; done means establishing whether this configuration is supported and documenting a confirmed resolution or limitation.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
distributed-systems, machine-learning
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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