nvmex Tutorial and File Linux nvmex Tutorials and Files

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi,

I am working the project that requires me to call CUDA kernels from Matlab.
I am using Linux version 2.6.18-308.1.1.el5 and gcc version 4.1.2 20080704.

The matlab that I am running on my system is MATLAB Version: 7.14.0.739 (R2012a).

Now I have been searching on the net and every time I get the link for UCF which has the tutorial for Visual studio.
I need a comprehensive tutorial for linux installation of nvmex and its corresponding files.
(*** I guess nVIDIA has removed that link for matlab_with_cuda and the files as well ***)

I know about Jacket and Parallel Computing Toolbox but I still want go ahead with nvmex.

Please help me guys.
Just let me know if you have any sources for installation of nvmex tool for LINUX.

Thanks in advance.
Cheers

2

Instead of using nvmex, you can use these 2 lines from inside Matlab:

!nvcc -c my.cu -Xcompiler -fPIC -I /usr/local/matlab/extern/include

mex my.o -L /usr/local/cuda/lib64 -lcudart -lcufft

The rest of the code in whitepaper is still correct.

3

Hi,

Thanks a lot for your reply.

The first stage from your reply worked. I am using the sample code given in the white paper.

However for the second stage, I am getting the following error.

/*********************************************************/

>>mex sample.o -L /usr/local/cuda/lib64 -Icudart

Warning: No source files in argument list. Assuming C source

             code for linking purposes. To override this

             assumption use '-fortran' or '-cxx'.

Warning: You are using gcc version "4.1.2".  The version

         currently supported with MEX is "4.4.6".

         For a list of currently supported compilers see: 

         http://www.mathworks.com/support/compilers/current_release/

sample.o: In function `__sti____cudaRegisterAll_41_tmpxft_00000955_00000000_4_sample_cpp1_ii_e53e6457()':

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x10): undefined reference to `__cudaRegisterFatBinary'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x76): undefined reference to `__cudaRegisterFunction'

sample.o: In function `__cudaUnregisterBinaryUtil()':

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x94): undefined reference to `__cudaUnregisterFatBinary'

sample.o: In function `__device_stub__Z15square_elementsPfS_i(float*, float*, int)':

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0xbc): undefined reference to `cudaSetupArgument'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0xd8): undefined reference to `cudaSetupArgument'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0xf4): undefined reference to `cudaSetupArgument'

sample.o: In function `mexFunction':

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x210): undefined reference to `cudaMalloc'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x230): undefined reference to `cudaMalloc'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x296): undefined reference to `cudaMemcpy'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x32b): undefined reference to `cudaMemcpy'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x3d7): undefined reference to `cudaConfigureCall'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x41a): undefined reference to `cudaMemcpy'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x493): undefined reference to `cudaFree'

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text+0x49c): undefined reference to `cudaFree'

sample.o: In function `cudaError cudaLaunch<char>(char*)':

tmpxft_00000955_00000000-1_sample.cudafe1.cpp:(.text._Z10cudaLaunchIcE9cudaErrorPT_[cudaError cudaLaunch<char>(char*)]+0x11): undefined reference to `cudaLaunch'

collect2: ld returned 1 exit status

mex: link of ' "sample.mexa64"' failed.

Error using mex (line 206)

Unable to complete successfully.

/***************************************************************************/

I even tried using the cufft library using the -I switch it was just giving me this output.

Is it possible that I am making mistakes somewhere or do I need to configure some stuff?

Kindly reply.

Thanks in advance.

Cheers

4

Hi,

isn’t it a “-l” (small L) rather than a “-I” (capital i) to be used in the command line? The former indicates to link with a library whereas the later indicates a path to search for include files.

So your command line as proposed by mfatica should read

mex my.o -L /usr/local/cuda/lib64 -lcudart -lcufft

and not

mex my.o -L /usr/local/cuda/lib64 -Icudart -Icufft
5

@Gilles_C

Thank you so much. I guess I made a mistake while reading the white paper instructions about the -I and -L switches.
Sample file is working fine and is producing the expected output.

@m.fatica
Thanks again.

6

Hello,
how to deal with the warnning of “No source files in argument list”, I am in trouble with this problem, and can not debug my program. I have added the flag of “-g”. thanks a lot!