无法在 Torch 中导入（要求）'cutorch'

Question

我在我的机器上安装了 CUDA 7.5，并按照说明安装了 Torch here。在安装 Torch 之前，我将 CMake 升级到版本 3.2.x.x。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发现了 CUDA 7.5。但是，我无法使用 require 'cotorch 导入 cutorch，当我尝试使用终端中的 torch (th) 解释器运行时出现以下错误：

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，我在尝试执行 require 'cutorch':

时收到以下错误

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

然而，文件 libcutorch.so 位于上述目录中。 This 也没有帮我解决问题。有谁知道我应该着手解决这个问题吗？

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 google 组上的 alban desmaison）：

确保按照我在问题中提到的所有步骤进行操作，以确保正确安装 CUDA。
如果你安装了Theano，执行sudo python
然后import theano
然后转到 CUDA 示例文件夹和 make 其中一个示例（无论哪个）
然后./[name_of_the_sample]
然后 Torch 将可以轻松使用 CUDA 后端

如果您没有安装 Theano，请尝试使用sudo运行安装 CUDA 示例。 重要的步骤 是能够运行 CUDA 样本之一。

大功告成！

Answer 2

尝试sudo bash /torch/update.sh

无法在 Torch 中导入（要求）'cutorch'

Unable to import (require) 'cutorch' in Torch

lua

luajit

ubuntu-14.04

torch