code: def _gen_subtask_chunk_graph(t):
      graph = TileableGraph([t.data])
      next(TileableGraphBuilder(graph).build())
      return next(ChunkGraphBuilder(graph, fuse_enabled=False).build())
  
file_path: mars/benchmarks/asv_bench/benchmarks/execution.py
imports: import dataclasses
  import unittest.mock
  import mars.tensor
  from mars import new_session
  from mars.core.graph import TileableGraph, TileableGraphBuilder, ChunkGraphBuilder, ChunkGraph
  from mars.serialization import serialize
  from mars.services.task import new_task_id
  from mars.services.task.execution.ray import executor
label_desc: Use image node_id 1 for calling a global function with example usage: _gen_subtask_chunk_graph(t) and returns: next