require 'cudnn' error

[sunwooOh]

Hi all.
When I run require cudnn(in one of my files load_caffe.lua, line 3), this kind of error is raised:

/home/sunwoo/torch/install/bin/luajit: /home/sunwoo/torch/install/share/lua/5.1/trepl/init.lua:384: /home/sunwoo/torch/install/share/lua/5.1/cudnn/init.lua:71: attempt to call field 'hasFastHalfInstructions' (a nil value)
stack traceback:
[C]: in function 'error'
/home/sunwoo/torch/install/share/lua/5.1/trepl/init.lua:384: in function 'require'
load_caffe.lua:3: in main chunk
[C]: in function 'dofile'
...nwoo/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:145: in main chunk
[C]: at 0x00406670

I've installed cuDNN 7.5, luarocks install'ed all nn, cudnn, torch again, but problem's not solved.
What do you think is the matter?

Thank you.

[soumith]

updating cutorch will fix this.

[v1993]

I've got last version of cutorch and cudnn.torch (cudnn version 5, CUDA 8.0), lua 5.2, but I've got the same bug.

/home/v/.luarocks/share/lua/5.2/trepl/init.lua:501: in function </home/v/.luarocks/share/lua/5.2/trepl/init.lua:494>
[C]: in function 'error'
/home/v/.luarocks/share/lua/5.2/trepl/init.lua:384: in function 'require'
/home/v/.lua/onstart.lua:19: in function 'loadmod'
[string "_RESULT={loadmod 'cudnn'}"]:1: in main chunk
[C]: in function 'xpcall'
/home/v/.luarocks/share/lua/5.2/trepl/init.lua:652: in function 'repl'
/home/v/.luarocks/lib/luarocks/rocks/trepl/scm-1/bin/th:197: in main chunk
[C]: in ?

[soumith]

hi @v1993 . this error is definitely because of a non updated cutorch.

Maybe what is happening is that you have another cutorch on your system somewhere you dont expect.

[sunwooOh]

Now works perfectly.
Thank you @soumith.

[Lyken17]

Works for me
Thank you @soumith

[shimen]

Hi,
when I use the last commit I get:
th> require('cudnn')
/usr/local/share/lua/5.1/trepl/init.lua:389: /usr/local/share/lua/5.1/cudnn/init.lua:98: attempt to call field 'hasFastHalfInstructions' (a nil value)
stack traceback:
[C]: in function 'error'
/usr/local/share/lua/5.1/trepl/init.lua:389: in function 'require'
[string "_RESULT={require('cudnn')}"]:1: in main chunk
[C]: in function 'xpcall'
/usr/local/share/lua/5.1/trepl/init.lua:661: in function 'repl'
/usr/local/lib/luarocks/rocks/trepl/scm-1/bin/th:199: in main chunk
[C]: at 0x004054a0
[6.6986s]

[ngimel]

You need to update cutorch

[shimen]

I had made a full torch install after using clean-old.sh to clean all the old versions.
I had installed it with:
luarocks install cutorch
luarocks install cunn
luarocks install cudnn

When I run the command: luajit -lcutorch
I get:
ilyas@s29.black.bionic8.com ~$ luajit -lcutorch
luajit: /usr/local/share/lua/5.1/cutorch/init.lua:2: cannot load '/usr/local/lib/lua/5.1/libcutorch.so'
stack traceback:
[C]: in function 'require'
/usr/local/share/lua/5.1/cutorch/init.lua:2: in main chunk
[C]: at 0x0044cfb0
[C]: at 0x004054a0

When I install cutorch with this command: luarocks install cutorch 1.0-0
I get:
ilyas@s29.black.bionic8.com ~$ luajit -lcutorch
LuaJIT 2.1.0-beta1 -- Copyright (C) 2005-2015 Mike Pall. http://luajit.org/

|_ | | |
| | ___ _ __ | |
| |/ _ | '/ | '
| | () | | | (| | | |
/__/|| __|| ||

JIT: ON SSE2 SSE3 SSE4.1 fold cse dce fwd dse narrow loop abc sink fuse

#####################################################
so I made this install:
luarocks install cutorch 1.0-0
luarocks install cunn 1.0-0
luarocks install cudnn

now I get the error:
ilyas@s29.black.bionic8.com ~$ luajit -lcudnn
luajit: /usr/local/share/lua/5.1/cudnn/init.lua:98: attempt to call field 'hasFastHalfInstructions' (a nil value)
stack traceback:
/usr/local/share/lua/5.1/cudnn/init.lua:98: in function 'fasterHalfMathTypeForCurrentDevice'
/usr/local/share/lua/5.1/cudnn/init.lua:112: in function 'configureMath'
/usr/local/share/lua/5.1/cudnn/init.lua:131: in main chunk
[C]: at 0x0044cfb0
[C]: at 0x004054a0

after removing cudnn: luarocks remove cudnn

I had installed it with:
git clone https://github.com/soumith/cudnn.torch -b R5
cd cudnn.torch
luarocks make
cd ../

now it works, but it is not stable.

[ngimel]

do you have to use cutorch 1.0-0? Your problem would be solved if you used latest cutorch (luarocks install cutorch).

[shimen]

i had tried to install the latest versions, like this:
luarocks remove cutorch
luarocks remove cunn
luarocks remove cudnn

luarocks install cutorch
luarocks install cunn
luarocks install cudnn

Then I get an error from cutorch

[borisfom]

@shimen, you need to check your luarocks config if it gets cutorch from standard place.
This works:

luarocks install cutorch
Installing https://raw.githubusercontent.com/torch/rocks/master/cutorch-scm-1.rockspec...
Using https://raw.githubusercontent.com/torch/rocks/master/cutorch-scm-1.rockspec... switching to 'build' mode
Cloning into 'cutorch'...
remote: Counting objects: 206, done.
remote: Compressing objects: 100% (162/162), done.
remote: Total 206 (delta 59), reused 81 (delta 42), pack-reused 0
Receiving objects: 100% (206/206), 196.08 KiB | 0 bytes/s, done.
Resolving deltas: 100% (59/59), done.
Checking connectivity... done.

[MojganMaddah]

I have the same problem. I could install neither cutorch nor cudnn.

[honeyaya]

hello,
first I
"luarocks remove cutorch"
"luarocks remove cunn"
"luarocks remove cudnn"
and then
"luarocks install cutorch"
"luarocks install cunn"
"luarocks install cudnn"

and still the error

so , how to update cutorch to latest version ???
Thanks.

More, my error:
/usr/local/bin/luajit: /usr/local/share/lua/5.1/trepl/init.lua:389: /usr/local/share/lua/5.1/cudnn/init.lua:98: attempt to call field 'hasFastHalfInstructions' (a nil value)
stack traceback:
[C]: in function 'error'
/usr/local/share/lua/5.1/trepl/init.lua:389: in function 'require'
train.lua:9: in main chunk
[C]: in function 'dofile'
/usr/local/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk
[C]: at 0x004058f0

[wangweihb]

@soumith How to upgrade the cutorch? thanks

[StoneCypher]

Hi, I've manually uninstalled cutorch, cunn, cudnn, cleared the luarocks cache, reinstalled all three, and am still facing this issue

@ngimel @soumith - This should be reopened.