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Problems running Matlab examples of MEX + Cuda

2 次查看（过去 30 天）
Gabriel
Gabriel 2015-7-31
评论： Walter Roberson 2016-10-27
I am trying to execute a mex file using Nvidia NVCC compiler. I created a .cu and a .h file, as follows:
addVectors.h file:
#ifndef __ADDVECTORS_H__
#define __ADDVECTORS_H__
extern void addVectors(float *A, float *B, float *C, int size);
#endif __ADDVECTORS_H__
addVectors.cu file:
#include "AddVectors.h"
#include "mex.h"
__global__ void addVectorsMask(float *A, float *B, float *C, int size)
{
int ii = blockIdx.x;
if (ii >=size)
return;
C[ii] = A[ii] + B[ii];
}
void addVectors(floar *A, float *B, float *C, int size)
{
float *devA = 0;
float *devB = 0;
float *devC = 0;
cudaMalloc((void**)&devA, sizeof(float)*size);
cudaMalloc((void**)&devB, sizeof(float)*size);
cudaMalloc((void**)&devC, sizeof(float)*size);
cudaMemcpy(devA, A, sizeof(float)*size, cudaMemcpyHostToDevice);
cudaMemcpy(devB, B, sizeof(float)*size, cudaMemcpyHostToDevice);
addVectorMask<<<size, 1>>>(devA, devB, devC, size);
cudaMemcpu(C, devC, sizeof(float)*size, cudaMemcpyDeviceToHost);
cudaFree(devA);
cudaFree(devB);
cudaFree(devC);
}
In order to configure the compilers, I followed this tutorial:
https://scivision.co/matlab-r2013a-mex-on-ubuntu-13-04-64-bit/
When I try to compile it, using the command:
system('nvcc -c AddVectors.cu')
I get the following messages:
In file included from AddVectors.cu:1:
AddVectors.h:6: warning: extra tokens at end of #endif directive
AddVectors.cu:2: fatal error: mex.h: No such file or directory
compilation terminated.
ans =
1
I tried to compile using the verbose mode (-v option) and I got this:
#$ _SPACE_=
#$ _CUDART_=cudart
#$ _HERE_=/usr/local/cuda-5.5/bin
#$ _THERE_=/usr/local/cuda-5.5/bin
#$ _TARGET_SIZE_=
#$ _TARGET_DIR_=
#$ _TARGET_DIR_=targets/x86_64-linux
#$ TOP=/usr/local/cuda-5.5/bin/..
#$ NVVMIR_LIBRARY_DIR=/usr/local/cuda-5.5/bin/../nvvm/libdevice
#$ LD_LIBRARY_PATH=/usr/local/cuda-5.5/bin/../lib:/usr/local/MATLAB/R2013a/sys/os/glnxa64:/usr/local/MATLAB/R2013a/bin/glnxa64:/usr/local/MATLAB/R2013a/extern/lib/glnxa64:/usr/local/MATLAB/R2013a/runtime/glnxa64:/usr/local/MATLAB/R2013a/sys/java/jre/glnxa64/jre/lib/amd64/native_threads:/usr/local/MATLAB/R2013a/sys/java/jre/glnxa64/jre/lib/amd64/server:/usr/local/MATLAB/R2013a/sys/java/jre/glnxa64/jre/lib/amd64::/usr/lib/nvidia-current:/opt/lib64:/opt/lib
#$ PATH=/usr/local/cuda-5.5/bin/../open64/bin:/usr/local/cuda-5.5/bin/../nvvm/bin:/usr/local/cuda-5.5/bin:/home/gabs/.matlab/bin:/home/gabs/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/bin:/opt/lib64:/opt/lib:/usr/local/cuda-5.5/bin/nvcc
#$ INCLUDES="-I/usr/local/cuda-5.5/bin/../targets/x86_64-linux/include"
#$ LIBRARIES= "-L/usr/local/cuda-5.5/bin/../targets/x86_64-linux/lib"
#$ CUDAFE_FLAGS=
#$ OPENCC_FLAGS=
#$ PTXAS_FLAGS=
#$ gcc -D__CUDA_ARCH__=100 -E -x c++ -DCUDA_FLOAT_MATH_FUNCTIONS -DCUDA_NO_SM_11_ATOMIC_INTRINSICS -DCUDA_NO_SM_12_ATOMIC_INTRINSICS -DCUDA_NO_SM_13_DOUBLE_INTRINSICS -D__CUDACC__ -D__NVCC__ "-I/usr/local/cuda-5.5/bin/../targets/x86_64-linux/include" -include "cuda_runtime.h" -m64 -o "/tmp/tmpxft_00003248_00000000-6_AddVectors.cpp1.ii" "AddVectors.cu"
In file included from AddVectors.cu:1:
AddVectors.h:6: warning: extra tokens at end of #endif directive
AddVectors.cu:2: fatal error: mex.h: No such file or directory
compilation terminated.
I also tried the Mathworks example:
http://www.mathworks.com/help/distcomp/run-mex-functions-containing-cuda-code.html#btrgjg_
But I always get the SAME error message...!
I am using CUDA 5.5, Matlab R2013a and Ubuntu 14.04. What should I do? I looked for some answers, but none of them seem to solve my problem. Any help is appreciated.
  2 个评论
Gabriel
Gabriel 2015-7-31
Can anyone on Mathworks please help me? It seems that it is a quite recurrent question in this forum and still no answer!
Walter Roberson
Walter Roberson 2016-10-27
You probably need a -I to add a different include directory, the one that contains mex.h

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回答（1 个）

Steven Lord
Steven Lord 2015-7-31
Just reading the text of the first compiler warning, it looks like the compiler objects to the _ADDVECTORS_H_ after the #endif in addVectors.h. What happens if you replace that with this?
#endif
Also check the case of your #include; you #include "AddVectors.h" but your post calls that file addVectors.h.
  2 个评论
Gabriel
Gabriel 2015-7-31
Ok, that solved the first warning, but still, it won't compile:
AddVectors.cu:2: fatal error: mex.h: No such file or directory
compilation terminated.
ans =
1
BenImage
BenImage 2016-10-27
did you ever figure this out? I'm shocked that I can't find someone clearly addressing how to resolve this "mex.h" missing error.....

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