code: def test_perf_8B(self):
      test_config = {
          "mp": 2,
          "gpus": 16,
          "nodes": 4,
          "bs": 16,
          "steps": 100,
          "layers": 72,
          "hidden_size": 3072,
          "seq_length": 1024,
          "heads": 24,
          "deepspeed": True,
          "json": "ds_config_perf_bs16.json",
      }
  
      self.run_test(test_config)
  
file_path: H2O/h2o_flexgen/benchmark/third_party/DeepSpeed/tests/model/Megatron_GPT2/run_perf_test.py
imports: import unittest
  import re
  from test_common import BaseTestCase
label_desc: Use image node_id 4 for calling the GPT2PerfTestCase obj's underlying member method code with example usage: obj.test_perf_8B() without return types