root$ gpustat --debug
Error on querying NVIDIA devices. Use --debug flag for details
Traceback (most recent call last):
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/gpustat/__main__.py", line 19, in print_gpustat
    gpu_stats = GPUStatCollection.new_query()
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/gpustat/core.py", line 396, in new_query
    gpu_info = get_gpu_info(handle)
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/gpustat/core.py", line 365, in get_gpu_info
    process = get_process_info(nv_process)
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/gpustat/core.py", line 294, in get_process_info
    ps_process = psutil.Process(pid=nv_process.pid)
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/__init__.py", line 339, in __init__
    self._init(pid)
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/__init__.py", line 366, in _init
    self.create_time()
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/__init__.py", line 697, in create_time
    self._create_time = self._proc.create_time()
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/_pslinux.py", line 1459, in wrapper
    return fun(self, *args, **kwargs)
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/_pslinux.py", line 1641, in create_time
    values = self._parse_stat_file()
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/_common.py", line 340, in wrapper
    return fun(self)
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/_pslinux.py", line 1498, in _parse_stat_file
    with open_binary("%s/%s/stat" % (self._procfs_path, self.pid)) as f:
  File "/home/zhudd/anaconda3/lib/python3.7/site-packages/psutil/_pslinux.py", line 205, in open_binary
    return open(fname, "rb", **kwargs)
FileNotFoundError: [Errno 2] No such file or directory: '/proc/30094/stat'