[GitHub] [tvm] tqchen commented on pull request #8492: [AutoScheduler] Use PopenPool instead of multiprocessing.pool

[GitBox <gi...@apache.org>]

tqchen commented on pull request #8492:
URL: https://github.com/apache/tvm/pull/8492#issuecomment-911949552


   we can serialize callable functions(through cloud pickle), but the requirement is that the callable functions can only call functions in the tvm namespace and should be available in https://github.com/apache/tvm/blob/main/python/tvm/exec/popen_worker.py
   
   It does mean that if we call functions that are not by default imported, we might need to do
   
   ```c++
   def custom_func():
       # import here so things are available in the callee side
       import dep1
       dep1.xyz
   ```


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