code: def startGpuMetricPolling():
      gpuPollObj = GPUMetricPoller()
      gpuPollObj.start()
      return gpuPollObj
  
file_path: cugraph/python/utils/gpu_metric_poller.py
imports: import os
  import sys
  import threading
  from pynvml import smi
label_desc: Use image node_id 1 for calling a global function with example usage: startGpuMetricPolling() and returns: gpuPollObj