PYTHONUNBUFFERED=1 python3 -m verl.trainer.main_ppo \
  data.train_files=$HOME/data/gsm8k/train.parquet \
  data.val_files=$HOME/data/gsm8k/test.parquet \
  data.train_batch_size=256  \
  data.max_prompt_length=512 \
  data.max_response_length=256  \
  actor_rollout_ref.model.path=Qwen/Qwen2.5-0.5B-Instruct \
  actor_rollout_ref.actor.optim.lr=1e-6 \
  actor_rollout_ref.actor.ppo_mini_batch_size=64 \
  actor_rollout_ref.actor.ppo_micro_batch_size_per_gpu=4  \
  actor_rollout_ref.rollout.log_prob_micro_batch_size_per_gpu=8 \
  actor_rollout_ref.rollout.tensor_model_parallel_size=1 \
  actor_rollout_ref.rollout.gpu_memory_utilization=0.4 \
  actor_rollout_ref.ref.log_prob_micro_batch_size_per_gpu=4 \
  critic.optim.lr=1e-5 \
  critic.model.path=Qwen/Qwen2.5-0.5B-Instruct \
  critic.ppo_micro_batch_size_per_gpu=4 \
  algorithm.kl_ctrl.kl_coef=0.001 \
  trainer.logger=console \
  trainer.val_before_train=False \
  trainer.n_gpus_per_node=1 \
  trainer.nnodes=1 \
  actor_rollout_ref.rollout.name=hf \
  trainer.total_training_steps=2