C++
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Passing vector to cuda device
I'm trying to pass a vector to a Cuda enabled graphics card.
My somewhat lacking pointer understanding makes me unable to understand why it doesn't work.
The first example works, the second doesn't.
My somewhat lacking pointer understanding makes me unable to understand why it doesn't work.
The first example works, the second doesn't.
float a[num] = { 0 };
float* Ad;
size = num * sizeof(float);
cudaMalloc((void**)&Ad, size); //Allocate memory on graphics device
cudaMemcpy(Ad, a, size, cudaMemcpyHostToDevice); //Copy contents from host memory to device memory
vector<int> tmp;
for(int i = 0; i < 10; i++) tmp.push_back(i);
vector<int>* tmp2;
cudaMalloc((void**)&tmp2, tmp.size() * sizeof(int));
cudaMemcpy(tmp2, tmp, tmp.size() * sizeof(int), cudaMemcpyHostToDevice);
Compiler error: 'error: no suitable conversion function from "std::vector<int, std::allocator<int>>" to "const void *" exists'
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Try this :
vector<int> tmp;
for(int i = 0; i < 10; i++) tmp.push_back(i);
int* tmp2 = &tmp[0];
cudaMalloc((void**)&tmp2, tmp.size() * sizeof(int));
cudaMemcpy(tmp2, tmp, tmp.size() * sizeof(int), cudaMemcpyHostToDevice);
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Compiles fine, thanks :)
Mind elaborating on that?
Mind elaborating on that?
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One can always count on your answers being accurate and informative Infinity.
Thank you again :)
Thank you again :)
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>> One can always count on your answers being accurate and informative Infinity.
>> Thank you again :)
Glad to be of assistance :)
>> Thank you again :)
Glad to be of assistance :)
C++
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C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.