[GitHub] [tvm] huochaitiantang opened a new issue #7790: target = None error while tuing an autotvm task

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

huochaitiantang opened a new issue #7790:
URL: https://github.com/apache/tvm/issues/7790


   
   After PR7534(https://github.com/apache/tvm/pull/7534), while tuning an autotvm task, self.target = None, self.target_host = None (default) in class tvm.autotvm.task.Task, will introduce the error :
   
   @zxybazh
   
   ```
   Traceback (most recent call last):
     File "test_quantize.py", line 66, in <module>
       tuner.tune(20, logfile=logfile)
     File "~/Desktop/tvms/tvm-oplib/tvmoplib/tvm_tuner/onnx_tuner.py", line 215, in tune
       tuner.load_history(tvm.autotvm.record.load_from_file(tmp_log_file))
     File "~/Desktop/tvms/tvm/python/tvm/autotvm/tuner/model_based_tuner.py", line 294, in load_history
       success = base_model.fit_log(data_set, self.plan_size)
     File "~/Desktop/tvms/tvm/python/tvm/autotvm/tuner/xgboost_cost_model.py", line 250, in fit_log
       res = pool.map(feature_extract_func, data)
     File "~/.pyenv/versions/3.6.4/lib/python3.6/multiprocessing/pool.py", line 266, in map
       return self._map_async(func, iterable, mapstar, chunksize).get()
     File "~/.pyenv/versions/3.6.4/lib/python3.6/multiprocessing/pool.py", line 644, in get
       raise self._value
     File "~/.pyenv/versions/3.6.4/lib/python3.6/multiprocessing/pool.py", line 424, in _handle_tasks
       put(task)
     File "~/.pyenv/versions/3.6.4/lib/python3.6/multiprocessing/connection.py", line 206, in send
       self._send_bytes(_ForkingPickler.dumps(obj))
     File "~/.pyenv/versions/3.6.4/lib/python3.6/multiprocessing/reduction.py", line 51, in dumps
       cls(buf, protocol).dump(obj)
     File "~/Desktop/tvms/tvm/python/tvm/autotvm/task/task.py", line 179, in __getstate__
       self.target, self.target_host
     File "~/Desktop/tvms/tvm/python/tvm/target/target.py", line 197, in check_and_update_host_consist
       target = Target(target, host)
     File "~/Desktop/tvms/tvm/python/tvm/target/target.py", line 98, in __init__
       raise ValueError("target has to be a string or dictionary.")
   ValueError: target has to be a string or dictionary.
   ```


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[GitHub] [tvm] tqchen closed issue #7790: target = None error while tuing an autotvm task

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

tqchen closed issue #7790:
URL: https://github.com/apache/tvm/issues/7790


   


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[GitHub] [tvm] zxybazh commented on issue #7790: target = None error while tuing an autotvm task

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

zxybazh commented on issue #7790:
URL: https://github.com/apache/tvm/issues/7790#issuecomment-812600134


   Hi, this is a case when the target and target host are both empty, the Target constructor function would fail. I have patched the case in the new PR. Thanks for letting me know!


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