code: def stop(self):
      self.peak_monitoring = False
      self.thread.join()
      return self.cpu_memory_peak
  
file_path: accelerate/benchmarks/measures_util.py
imports: import gc
  import threading
  import time
  import psutil
  import torch
label_desc: Use image node_id 4 for calling the PeakCPUMemory obj's underlying member method code with example usage: obj.stop() and returns: self