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Description

As the title says.

Checklist

Please check the following items before code is ready to be reviewed.

  • Code has passed all tests
  • Docstrings have been added/updated in Google Style
  • Documentation has been updated
  • Code is ready for review

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Summary of Changes

Hello @yanxi-chen, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request adds a comprehensive example for implementing experience replay with Proximal Policy Optimization (PPO) on the Countdown dataset within the Trinity-RFT system. The primary goal is to demonstrate how experience replay can enhance learning efficiency and optimize hardware utilization by reusing rollout samples, particularly in scenarios where agent-environment interaction is resource-intensive. The example provides a concrete configuration and explains the custom priority function used, supported by experimental evidence of its positive impact.

Highlights

  • New Example for Experience Replay: This pull request introduces a new example demonstrating the experience replay mechanism within the Trinity-RFT framework, specifically for PPO on the Countdown dataset.
  • Detailed Configuration: A new countdown.yaml configuration file is added, showcasing how to enable and configure experience replay, including settings for the buffer, reuse_cooldown_time, and a custom priority_fn.
  • Custom Priority Function: The example utilizes a linear_decay_use_count_control_randomization priority function, whose logic is detailed to prioritize fresher and less used samples, with an option for random perturbation.
  • Experimental Results: The accompanying README.md presents experimental results that compare experience replay against a baseline, illustrating its benefits in learning efficiency and the ability to take more training steps.
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Code Review

This pull request introduces an example of experience replay using the PPO algorithm on the Countdown dataset. It includes a README.md explaining the implementation and configuration, and a countdown.yaml file with the specific configurations for this example. I have provided comments to address potential issues related to clarity and completeness.

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pan-x-c commented Oct 27, 2025

/unittest-module-common

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Summary

Tests 📝 Passed ✅ Failed ❌ Skipped ⏭️ Other ❓ Flaky 🍂 Duration ⏱️
33 33 0 0 0 0 317ms

Tests

Test Name Status Flaky Duration
tests/common/config_test.py::TestConfig::test_all_examples_are_valid 32ms
tests/common/config_test.py::TestConfig::test_config_flatten 1ms
tests/common/config_test.py::TestConfig::test_continue_from_checkpoint_is_valid 1ms
tests/common/config_test.py::TestConfig::test_default_workflow 1ms
tests/common/config_test.py::TestConfig::test_load_default_config 3ms
tests/common/config_test.py::TestConfig::test_max_token_len_per_gpu_set_correctly 1ms
tests/common/config_test.py::TestConfig::test_update_config_from_ray_cluster 2ms
tests/common/experience_test.py::TestEID::test_eid_properties 1ms
tests/common/experience_test.py::TestExperience::test_action_mask_and_logprobs_type 1ms
tests/common/experience_test.py::TestExperience::test_assertions 1ms
tests/common/experience_test.py::TestExperience::test_dpo_experience 1ms
tests/common/experience_test.py::TestExperience::test_gather 1ms
tests/common/experience_test.py::TestExperience::test_hf_datasets_conversion 1ms
tests/common/experience_test.py::TestExperience::test_multi_turn_experience 1ms
tests/common/experience_test.py::TestExperience::test_serialize_deserialize 1ms
tests/common/experience_test.py::TestExperience::test_single_turn_experience 1ms
tests/common/experience_test.py::TestExperience::test_to_dict 1ms
tests/common/experience_test.py::TestExperienceConversion::test_batch_conversion 1ms
tests/common/experience_test.py::TestExperienceConversion::test_dpo_experience_batch_conversion 1ms
tests/common/experience_test.py::TestExperienceConversion::test_experience_model_experience_conversion 1ms
tests/common/experience_test.py::TestExperienceConversion::test_gather_experiences_with_custom_fields 1ms
tests/common/experience_test.py::TestExperienceConversion::test_multiturn_experience_batch_converstion 1ms
tests/common/vllm_test.py::ModelWrapperTest_0::test_generate 57ms
tests/common/vllm_test.py::ModelWrapperTest_1::test_generate 36ms
tests/common/vllm_test.py::ModelWrapperTest_2::test_generate 45ms
tests/common/vllm_test.py::TestModelLen_0::test_model_len 21ms
tests/common/vllm_test.py::TestModelLen_1::test_model_len 21ms
tests/common/vllm_test.py::TestAPIServer::test_api 24ms
tests/common/vllm_test.py::TestAsyncAPIServer::test_api_async 24ms
tests/common/vllm_test.py::TestTokenizer::test_action_mask 1ms
tests/common/vllm_test.py::TestTokenizer::test_action_mask_with_tools 1ms
tests/common/vllm_test.py::TestAPIServerToolCall_0_deepseek_r1::test_api_tool_calls 22ms
tests/common/vllm_test.py::TestAPIServerToolCall_1::test_api_tool_calls 20ms

Github Test Reporter by CTRF 💚

@chenyushuo chenyushuo merged commit 15c296f into modelscope:main Oct 27, 2025
2 checks passed
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3 participants