code: def test_perf_1_5B(self):
      test_config = {
          "mp": 2,
          "gpus": 16,
          "nodes": 4,
          "bs": 16,
          "steps": 100,
          "layers": 48,
          "hidden_size": 1600,
          "seq_length": 1024,
          "heads": 16,
          "deepspeed": False,
      }
  
      self.run_test(test_config)
  
file_path: DeepSpeed/tests/model/Megatron_GPT2/run_perf_baseline.py
imports: import unittest
  import re
  from test_common import BaseTestCase
label_desc: Use image node_id 2 for calling the GPT2PerfBaselineTestCase obj's underlying member method code with example usage: obj.test_perf_1_5B() without return types