无法在 Torch 中导入（需要）“cutorch”

Question

我的机器上安装了 CUDA 7.5，并按照说明 here 安装了 Torch。在安装 Torch 之前，我将 CMake 升级到了 3.2.x.x 版本。然后我使用以下命令安装了cutorch 和cunn：

luarocks install cutorch
luarocks install cunn

在安装 cutorch 时，我看到一些消息说在我的机器上找到了 CUDA 7.5。但是，我无法使用require 'cotorch 导入cutorch，当我尝试在终端中使用torch (th) 解释器运行它时出现以下错误：

THCudaCheck FAIL file=/tmp/luarocks_cutorch-scm-1-8316/cutorch/lib/THC/THCGeneral.c line=17 error=30 : unknown error
/home/amir/torch/install/share/lua/5.1/trepl/init.lua:384: cuda runtime error (30) : unknown error at /tmp/luarocks_cutorch-scm-1-8316/cutorch/lib/THC/THCGeneral.c:17
stack traceback:
    [C]: in function 'error'
    /home/amir/torch/install/share/lua/5.1/trepl/init.lua:384: in function 'require'
    [string "_RESULT={require "cutorch"}"]:1: in main chunk
    [C]: in function 'xpcall'
    /home/amir/torch/install/share/lua/5.1/trepl/init.lua:651: in function 'repl'
    ...amir/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:199: in main chunk
    [C]: at 0x00406670  

然后我按照说明here 能够使用 Eclipse 编写 Lua/Torch 代码。在那里，尝试执行require 'cutorch' 时出现以下错误：

qlua: /home/amir/torch/install/share/lua/5.1/cutorch/init.lua:2: cannot load '/home/amir/torch/install/lib/lua/5.1/libcutorch.so'
stack traceback:
    [C]: at 0x7f05cf9709e0
    [C]: in function 'require'
    /home/amir/torch/install/share/lua/5.1/cutorch/init.lua:2: in main chunk
    [C]: in function 'require'
    /home/amir/workspace/test/src/main.lua:2: in function 'main'
    /home/amir/workspace/test/src/main.lua:6: in main chunk

不过，文件libcutorch.so 位于上述目录中。 This 也没有帮助我解决问题。有谁知道我应该解决这个问题吗？

当我输入luarocks list 时，我得到以下信息：

Installed rocks:
----------------

argcheck
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

cudnn
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

cunn
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

cunnx
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

cutorch
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

cwrap
   scm-1 (installed) - /home/amir/.luarocks/lib/luarocks/rocks
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

dok
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

env
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

fftw3
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

gnuplot
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

graph
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

graphicsmagick
   1.scm-0 (installed) - /home/amir/torch/install/lib/luarocks/rocks

image
   1.1.alpha-0 (installed) - /home/amir/torch/install/lib/luarocks/rocks

lbase64
   20120820-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

lua-cjson
   2.1devel-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

luaffi
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

luafilesystem
   1.6.3-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

luasocket
   3.0rc1-2 (installed) - /home/amir/torch/install/lib/luarocks/rocks

nn
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

nngraph
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

nnx
   0.1-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

optim
   1.0.5-0 (installed) - /home/amir/torch/install/lib/luarocks/rocks

paths
   scm-1 (installed) - /home/amir/.luarocks/lib/luarocks/rocks
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

penlight
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

qtlua
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

qttorch
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

signal
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

sundown
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

sys
   1.1-0 (installed) - /home/amir/torch/install/lib/luarocks/rocks

threads
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

torch
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

trepl
   scm-1 (installed) - /home/amir/torch/install/lib/luarocks/rocks

xlua
   1.0-0 (installed) - /home/amir/torch/install/lib/luarocks/rocks

Answer 1

好的，这是解决问题的方法（感谢 Torch7 谷歌小组的 alban desmaison）：

• 确保您按照我在问题中提到的所有步骤操作，以确保正确安装了 CUDA。
• 如果你安装了 Theano，执行sudo python
• 然后做import theano
• 然后转到 CUDA 示例文件夹和 make 示例之一（不管是哪一个）
• 然后做./[name_of_the_sample]
• 然后 Torch 就可以轻松使用 CUDA 后端了

如果您没有安装 Theano，请尝试使用 sudo 运行 CUDA 示例。 重要的一步是能够运行 CUDA 示例之一。

现在一切就绪！

Answer 2

试试sudo bash /torch/update.sh