code: def get_cpu_mem():
      return psutil.Process().memory_info().rss / 1024**2
  
file_path: colossalai/examples/community/roberta/pretraining/utils/exp_util.py
imports: import functools
  import os
  import shutil
  import psutil
  import torch
  from colossalai.legacy.core import global_context
label_desc: Use image node_id 4 for calling a global function with example usage: get_cpu_mem() and returns: unknown