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modelscope--ms-swift/examples/megatron/grpo/multi_turn/frozen_lake_server.sh
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# server mode version of frozen_lake.sh
CUDA_VISIBLE_DEVICES=0,1,2,3 \
swift rollout \
--model Qwen/Qwen3.5-2B \
--enable_thinking false \
--vllm_data_parallel_size 4 \
--multi_turn_scheduler gym_scheduler \
--gym_env frozen_lake \
--use_gym_env true \
--max_turns 10 \
--max_length 6120 \
--vllm_max_model_len 6632 \
--external_plugins examples/megatron/grpo/multi_turn/frozen_lake_plugin.py > frozen_lake_rollout.log 2>&1 &
# Wait for rollout server to be ready
echo "Waiting for rollout server to start..."
until curl -s http://127.0.0.1:8000/health/ > /dev/null 2>&1; do
sleep 10
done
echo "Rollout server is ready!"
CUDA_VISIBLE_DEVICES=4,5,6,7 \
NPROC_PER_NODE=4 \
megatron rlhf \
--rlhf_type grpo \
--model Qwen/Qwen3.5-2B \
--save_safetensors true \
--context_parallel_size 1 \
--tensor_model_parallel_size 1 \
--pipeline_model_parallel_size 1 \
--train_iters 120 \
--dataset 'examples/megatron/grpo/multi_turn/frozen_lake.jsonl#1024' \
--load_from_cache_file false \
--global_batch_size 32 \
--micro_batch_size 1 \
--steps_per_generation 4 \
--num_generations 8 \
--external_plugins examples/megatron/grpo/multi_turn/frozen_lake_plugin.py \
--use_vllm true \
--vllm_mode server \
--vllm_server_host 127.0.0.1 \
--vllm_server_port 8000 \
--max_length 6120 \
--max_completion_length 512 \
--enable_thinking false \
--tuner_type lora \
--lr 5e-5 \
--bf16 true \
--beta 0.001 \
--importance_sampling_level token \
--epsilon 0.2 \
--epsilon_high 0.2 \
--dynamic_sample false \
--overlong_filter true \
--loss_type grpo \
--logging_steps 1 \
--recompute_granularity selective \
--finetune \
--dataloader_num_workers 4 \
--dataset_num_proc 4 \
--no_save_optim \
--no_save_rng \
--attention_backend flash \
--temperature 1.0 \
--top_p 1.0 \
--top_k 80 \
--padding_free true \
--log_completions true \
--report_to tensorboard swanlab \
--eval_steps 1000 \
--save_steps 1000 \