require 'cudnn', then have this question, libcudnn.so.7

[wcy-cs]

/data/URDGN$ luajit -lcudnn
THCudaCheck FAIL file=/home/lll/torch/extra/cutorch/init.c line=778 error=2 : out of memory
luajit: /home/lll/torch/install/share/lua/5.1/cudnn/ffi.lua:1774: cuda runtime error (2) : out of memory at /home/lll/torch/extra/cutorch/init.c:778
stack traceback:/data/URDGN$ luajit -lcudnn
THCudaCheck FAIL file=/home/lll/torch/extra/cutorch/init.c line=778 error=2 : out of memory
luajit: /home/lll/torch/install/share/lua/5.1/cudnn/ffi.lua:1774: cuda runtime error (2) : out of memory at /home/lll/torch/extra/cutorch/init.c:778
stack traceback:
[C]: in function 'getDeviceProperties'
/home/lll/torch/install/share/lua/5.1/cudnn/ffi.lua:1774: in main chunk
[C]: in function 'require'
/home/lll/torch/install/share/lua/5.1/cudnn/init.lua:4: in main chunk
[C]: at 0x00464bb0
[C]: at 0x00405d50

[C]: in function 'getDeviceProperties'
/home/lll/torch/install/share/lua/5.1/cudnn/ffi.lua:1774: in main chunk
[C]: in function 'require'
/home/lll/torch/install/share/lua/5.1/cudnn/init.lua:4: in main chunk
[C]: at 0x00464bb0
[C]: at 0x00405d50