EdisonZiXing edited a comment on issue #11141:
URL: https://github.com/apache/arrow/issues/11141#issuecomment-918725879


   > I'm afraid you will need to explain in more detail what you are trying to 
do and what results you are expecting to get. Some operations in Arrow-C++ 
(which pyarrow uses) will take advantage of multiple threads. These operations 
are controlled by the functions you mentioned. Mostly today this is in file 
parsing and decoding. On the other hand, some functions are implemented 
completely in python (and thus subject to the GIL) and others are implemented 
in C++ and release the GIL but do not use multiple threads.
   
   Sorry master,I didn't clarify what I was trying to do.Here is the my 
problem: I'm trying to use gandiva to speed up the filter operations.But I dont 
know how to use multi-cpus to speed up gandiva. So I wanna find a way to 
acheive this goal. 
   Looking forward to your guide!!!


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