deepspeedai / deepspeedai/DeepSpeed
Deepspeed zero3 memory leak with rlhf [BUG]
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bug
deepspeed-chat
- Dominant language
- Python
- Stars
- 43.1k
- Forks
- 5k
- Avg merge
- 4d 15h
- Merged PRs (30d)
- 112
Description
Describe the bug
At the beginning, the model was able to train, but when it reached 600+steps, the memory of the main process skyrocketed. I didn't save the checkpoint
Memory usage at the beginning
Memory explosion
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
No files, tests, or entry points are named. Start by reproducing the RLHF run with DeepSpeed ZeRO-3 and monitor main-process memory around step 600; done means identifying the leak and confirming that memory remains stable afterward.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python, pytorch
- 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