code: def compare(gt, bt):
      x1, y1, dy1, dgrad1, wgrad1 = gt
      x2, y2, dy2, dgrad2, wgrad2 = bt
      results = {}
      compare_single_field(results, y1, y2, "y", "gt", "bt")
      compare_single_field(results, dy1, dy2, "dy", "gt", "bt")
      compare_single_field(results, dgrad1, dgrad2, "dgrad", "gt", "bt")
      compare_single_field(results, wgrad1, wgrad2, "wgrad", "gt", "bt")
      for i in range(torch.distributed.get_world_size()):
          if i == torch.distributed.get_rank():
              print(i, results)
          torch.distributed.barrier()
  
imports: import unittest
  import torch
  from torch.testing._internal import common_utils
  from apex.transformer.testing.distributed_test_base import NcclDistributedTestBase
label_desc: Use image node_id 13 for calling a global function with example usage: compare(gt, bt) without return types