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I download pytorch from this link and get it installed in my server. It works fine in a test file. However,
LD_LIBRARY_PATH contains no cudnn.  I wondering pytorch installed in this way get no utilization
of cudnn lib, leading to the slow training in DNNs.

If I add to cudnn path to LD_LIBRARY_PATH, does pytorch automatically utilizes it ?
Can I print the information of cudnn that pytorch is using?

Thank you!