Torch7.0 cuda 9.0 cudnn7.0

[wcy-cs]

th> require 'cudnn'
THCudaCheck FAIL file=/home/lab611/torch/extra/cutorch/init.c line=778 error=2 : out of memory
/home/lab611/torch/install/share/lua/5.1/trepl/init.lua:389: /home/lab611/torch/install/share/lua/5.1/trepl/init.lua:389: /home/lab611/torch/install/share/lua/5.1/cudnn/ffi.lua:1774: cuda runtime error (2) : out of memory at /home/lab611/torch/extra/cutorch/init.c:778
stack traceback:
[C]: in function 'error'
/home/lab611/torch/install/share/lua/5.1/trepl/init.lua:389: in function 'require'
[string "_RESULT={require 'cudnn'}"]:1: in main chunk
[C]: in function 'xpcall'
/home/lab611/torch/install/share/lua/5.1/trepl/init.lua:661: in function 'repl'
...b611/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:204: in main chunk
[C]: at 0x00405d50
[2.0482s]
th> ^C
/home/lab611/torch/install/bin/luajit: /home/lab611/torch/install/share/lua/5.1/trepl/init.lua:594: interrupted!
stack traceback:
/home/lab611/torch/install/share/lua/5.1/trepl/init.lua:594: in function 'repl'
...b611/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:204: in main chunk
[C]: at 0x00405d50

cry for help! Thank you.