我正在尝试在发布模式下在 Qt 上编译简单的代码 CUDA。我的.pro
TEMPLATE = app
CONFIG += console
QT += core
CONFIG -= app_bundle
QT -= gui
# Define output directories
DESTDIR = release
OBJECTS_DIR = obj
CUDA_OBJECTS_DIR = OBJECTS_DIR/cuda
SOURCES += main.cpp
# This makes the .cu files appear in your project
OTHER_FILES += vectorAddition.cu
# CUDA settings <-- may change depending on your system
CUDA_SDK = "C:/ProgramData/NVIDIA Corporation/CUDA Samples/v5.0" # Path to cuda SDK install
CUDA_DIR = "C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v5.0" # Path to cuda toolkit install
SYSTEM_NAME = Win32 # Depending on your system either 'Win32', 'x64', or 'Win64'
SYSTEM_TYPE = 32 # '32' or '64', depending on your system
CUDA_ARCH += sm_20 # Type of CUDA architecture, for example 'compute_10', 'compute_11', 'sm_10'
NVCC_OPTIONS = --use_fast_math
NVCCFLAGS = --compiler-options -fno-strict-aliasing -use_fast_math --ptxas-options=-v
# include paths
INCLUDEPATH += $$CUDA_DIR/include \
$$CUDA_SDK/common/inc
# library directories
QMAKE_LIBDIR += $$CUDA_DIR/lib/$$SYSTEM_NAME \
$$CUDA_SDK/common/lib/$$SYSTEM_NAME
# Add the necessary libraries
LIBS += -lcuda -lcudart
# The following makes sure all path names (which often include spaces) are put between quotation marks
CUDA_INC = $$join(INCLUDEPATH,'" -I"','-I"','"')
# Configuration of the Cuda compiler
CONFIG(debug, debug|release) {
# debug mode
cuda.input =vectorAddition.cu
cuda.output = $$CUDA_OBJECTS_DIR/${QMAKE_FILE_BASE}_cuda.obj
cuda.commands = $$CUDA_DIR/bin/nvcc.exe -D_DEBUG -m32 -g -G -c $$NVCCFLAGS $$NVCC_OPTIONS $$CUDA_INC $$LIBS --machine $$SYSTEM_TYPE -arch=$$CUDA_ARCH -c -o ${QMAKE_FILE_OUT}${QMAKE_FILE_NAME}
cuda.dependency_type = TYPE_C
QMAKE_EXTRA_COMPILERS += cuda_d
}
else {
# Release mode
cuda.input = vectorAddition.cu
cuda.output = $$CUDA_OBJECTS_DIR/${QMAKE_FILE_BASE}_cuda.o
cuda.commands = $$CUDA_DIR/bin/nvcc.exe $$CUDA_INC $$LIBS --machine $$SYSTEM_TYPE -c -o ${QMAKE_FILE_OUT}${QMAKE_FILE_NAME}
cuda.dependency_type = TYPE_C
QMAKE_EXTRA_COMPILERS += cuda
}
vectorAddition.cu
extern "C"
__global__ void vectorAdditionCUDA(const float* a, const float* b, float* c, int n)
{
int ii = blockDim.x * blockIdx.x + threadIdx.x;
if (ii < n)
c[ii] = a[ii] + b[ii];
}
void vectorAddition(const float* a, const float* b, float* c, int n) {
float *a_cuda, *b_cuda, *c_cuda;
unsigned int nBytes = sizeof(float) * n;
int threadsPerBlock = 256;
int blocksPerGrid = (n + threadsPerBlock - 1) / threadsPerBlock;
// allocate and copy memory into the device
cudaMalloc((void **)& a_cuda, nBytes);
cudaMalloc((void **)& b_cuda, nBytes);
cudaMalloc((void **)& c_cuda, nBytes);
cudaMemcpy(a_cuda, a, nBytes, cudaMemcpyHostToDevice);
cudaMemcpy(b_cuda, b, nBytes, cudaMemcpyHostToDevice);
vectorAdditionCUDA<<<blocksPerGrid, threadsPerBlock>>>(a_cuda, b_cuda, c_cuda, n);
// load the answer back into the host
cudaMemcpy(c, c_cuda, nBytes, cudaMemcpyDeviceToHost);
cudaFree(a_cuda);
cudaFree(b_cuda);
cudaFree(c_cuda);
}
Main.cpp
#include <iostream>
#include <QtCore/QCoreApplication>
#include <QDebug>
#include <cuda.h>
using namespace std;
extern"C" void vectorAddition(const float* a, const float* b, float* c, int n);
void printArray(const float* a, const unsigned int n) {
QString s = "(";
unsigned int ii;
for (ii = 0; ii < n - 1; ++ii)
s.append(QString::number(a[ii])).append(", ");
s.append(QString::number(a[ii])).append(")");
qDebug() << s;
}
int main()
{
cout << "Hello World!:" <<endl;
int deviceCount = 0;
int cudaDevice = 0;
char cudaDeviceName [100];
unsigned int N = 50;
float *a, *b, *c;
cuInit(0);
cuDeviceGetCount(&deviceCount);
cuDeviceGet(&cudaDevice, 0);
cuDeviceGetName(cudaDeviceName, 100, cudaDevice);
qDebug() << "Number of devices: " << deviceCount;
qDebug() << "Device name:" << cudaDeviceName;
a = new float [N]; b = new float [N]; c = new float [N];
for (unsigned int ii = 0; ii < N; ++ii) {
a[ii] = qrand();
b[ii] = qrand();
}
// This is the function call in which the kernel is called
vectorAddition(a,b,c,N);
qDebug() << "input a:"; printArray(a, N);
qDebug() << "input b:"; printArray(b, N);
qDebug() << "output c:"; printArray(c, N);
if (a) delete a;
if (b) delete b;
if (c) delete c;
return 0;
}
当我尝试编译时，我得到一个“未定义对'vectorAddition'的引用”错误。我认为问题是 Qt Creator 没有将vectorAddition.cu文件添加到项目树中，即使我将其添加到OTHER_FILES.