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modelscope--ms-swift/examples/megatron/rlhf/gkd/teacher_server.sh
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top_k=64
max_prompt_length=2048
max_completion_length=2048
max_total_length=$((max_prompt_length + max_completion_length))
export IMAGE_MAX_TOKEN_NUM=1024
# Teacher server must be running first:
# CUDA_VISIBLE_DEVICES=0 \
# swift deploy \
# --model Qwen/Qwen3.5-4B \
# --infer_backend vllm \
# --port 8000 \
# --max_logprobs $top_k \
# --max_length $max_total_length \
# --vllm_max_model_len $max_total_length
CUDA_VISIBLE_DEVICES=1,2 \
NPROC_PER_NODE=2 \
PYTORCH_CUDA_ALLOC_CONF='expandable_segments:True' \
megatron rlhf \
--rlhf_type gkd \
--model Qwen/Qwen3.5-4B \
--teacher_model_server http://localhost:8000 \
--gkd_logits_topk $top_k \
--dataset 'AI-ModelScope/clevr_cogen_a_train' \
--tensor_model_parallel_size 1 \
--pipeline_model_parallel_size 1 \
--context_parallel_size 1 \
--expert_model_parallel_size 1 \
--lmbda 1 \
--beta 0.5 \
--torch_dtype bfloat16 \
--micro_batch_size 2 \
--global_batch_size 32 \
--train_iters 500 \
--lr 5e-5 \
--lr_warmup_fraction 0.1 \
--logging_steps 1 \
--save_steps 100 \
--save_total_limit 10 \
--max_length $max_prompt_length \
--max_completion_length $max_completion_length \
--attention_backend flash \
--use_vllm true \
--vllm_mode colocate \
--vllm_gpu_memory_utilization 0.5 \
--vllm_tensor_parallel_size 1 \
--vllm_max_model_len $max_total_length \
--sleep_level 1 \
--finetune \
--no_save_optim \
--no_save_rng \
--temperature 1.0 \
--padding_free true \
--recompute_granularity selective