class_docstr: The context for tiling.
code: def get_total_n_cpu(self) -> int:
      # TODO(fyrestone): Support auto scaling.
      return self._config.get_n_cpu() * self._config.get_n_worker()
  
imports: import logging
  from dataclasses import asdict
  from typing import Dict, List, Callable
  from .....core.context import Context
  from .....storage.base import StorageLevel
  from .....typing import ChunkType
  from .....utils import implements, lazy_import, sync_to_async
  from ....context import ThreadedServiceContext
  from .config import RayExecutionConfig
label_desc: Use image node_id 4 for calling the RayExecutionContext obj's underlying member method code with example usage: obj.get_total_n_cpu() and returns: unknown