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* Add RoBERTa for RLHF Stage 2 & 3 (test)

RoBERTa for RLHF Stage 2 & 3 (still in testing)

* Revert "Add RoBERTa for RLHF Stage 2 & 3 (test)"

This reverts commit 06741d894dcbe958acd4e10d771f22275e20e368.

* Add RoBERTa for RLHF stage 2 & 3

1. add roberta folder under model folder
2. add  roberta option in train_reward_model.py
3. add some test in testci

* add test for reward model training

* Update test_ci.sh

* Revert "Update test_ci.sh"

This reverts commit 9c7352b81766f3177d31eeec0ec178a301df966a.

* Add RoBERTa for RLHF Stage 2 & 3 (test)

RoBERTa for RLHF Stage 2 & 3 (still in testing)

* Revert "Add RoBERTa for RLHF Stage 2 & 3 (test)"

This reverts commit 06741d894dcbe958acd4e10d771f22275e20e368.

* Add RoBERTa for RLHF stage 2 & 3

1. add roberta folder under model folder
2. add  roberta option in train_reward_model.py
3. add some test in testci

* Update test_ci.sh

* Revert "Update test_ci.sh"

This reverts commit 9c7352b81766f3177d31eeec0ec178a301df966a.

* update roberta with coati

Co-authored-by: Yuanchen Xu <yuanchen.xu00@gmail.com>

* add normalize function to value_head in bloom rm

* add normalization to value_function in gpt_rm

* add normalization to value_head of opt_rm

* add Anthropic/hh-rlhf dataset

* Update __init__.py

* Add LogExpLoss in RM training

* Update __init__.py

* update rm trainer to use acc as target

* update example/train_rm

* Update train_rm.sh

* code style

* Update README.md

* Update README.md

* add rm test to ci

* fix tokenier

* fix typo

* change batchsize to avoid oom in ci

* Update test_ci.sh

* [chatgpt]update ci

* Update test_ci.sh

* Update test_ci.sh

* Update test_ci.sh

* test

* Update train_prompts.py

* Update train_dummy.py

* add save_path

* polish

* add save path

* polish

* add save path

* polish

* delete bloom-560m test

delete bloom-560m test because of oom

* add ddp test

* [chatgpt] making experience support dp

* [chatgpt] update example test ci

* [chatgpt] update example test ci

* [chatgpt] update example test ci

* [chatgpt] update example test ci

* [chatgpt] update sampler

* [chatgpt] update example test ci

* [chatgpt] refactor sampler

* [chatgpt] update example test ci