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…erl-project#1839) ### Checklist Before Starting - [ ] Search for similar PR(s). ### What does this PR do? - 支持多模的 PPO，主要是复用 trl 的 `AutoModelForCausalLMWithValueHead` 作为 critic valuehead model ### High-Level Design > Demonstrate the high-level design if this PR is complex. ### Specific Changes > List the specific changes. ### API > Demonstrate how the API changes if any. ### Usage Example > Provide usage example(s) for easier usage. ```python # Add code snippet or script demonstrating how to use this ``` ### Test > For changes that can not be tested by CI (e.g., algorithm implementation, new model support), validate by experiment(s) and show results like training curve plots, evaluatuion results, etc. ### Additional Info. - **Issue Number**: Fixes issue # or discussion # if any. - **Training**: [Note which backend this PR will affect: FSDP, Megatron, both, or none] - **Inference**: [Note which backend this PR will affect: vLLM, SGLang, both, or none] ### Checklist Before Submitting - [ ] Read the [Contribute Guide](https://github.com/volcengine/verl?tab=readme-ov-file#contribution-guide). - [ ] Apply [pre-commit checks](https://github.com/volcengine/verl?tab=readme-ov-file#code-linting-and-formatting). - [ ] Add `[BREAKING]` to the PR title if it breaks any API. - [ ] Update the documentation about your changes in the [docs](https://github.com/volcengine/verl/tree/main/docs). - [ ] New CI unit test(s) are added to cover the code path. - [ ] Rely on existing unit tests on CI that covers the code path. --------- Co-authored-by: Yaowei Zheng <hiyouga@buaa.edu.cn>
Signed-off-by: Jianbing Dong <jianbingd@nvidia.com>
Signed-off-by: Jianbing Dong <jianbingd@nvidia.com>
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Checklist Before Starting
What does this PR do?
High-Level Design
Specific Changes
API
Usage Example
# Add code snippet or script demonstrating how to use thisTest
Additional Info.
Checklist Before Submitting
[BREAKING]to the PR title if it breaks any API.