accessing __device__ global variables

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi,

It might be possible the following code?

device float var;

host void func1(){

float v=3;
cudaMemcpy(&var, &v, sizeof(float),cudaMemcpyHostToDevice);
}

global void func2(){

//Using var anyway…
}

The idea arises from using a global variable without calling
cudaMalloc. Is that possible?

Thanks!

2

var only exists on the device. You cannot take the address of var on the host. Use cudaGetSymbolAddress to get the address or use cudaMemcpyToSymbol.

3

Thank you!