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Alex Rivera
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I have a newbie doubt regarding how do CUDA kernels work. If have the following code (which use the function cuPrintf taken from here ): #include "cuPrintf.cu" __global__ void testKernel(int param){ cuPrintf("Param value: %d\n", param); } int main(void){ // initialize cuPrintf cudaPrintfInit(); int a = 456; testKernel<<<4,1>>>(a); // display the device's greeting cudaPrintfDisplay(); // clean up after cuPrintf cudaPrintfEnd(); } The output of the execution is: Param value: 456 Param value: 456 Param value: 456 Param value: 456 I cannot get how the kernel can read the correct value of the parameter I pass, isn't it allocated in the host memory? Can the GPU read from the host memory? Thanks, Andrea
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