I'm having trouble coalescing reads when using the float2 datatype in CUDA.
I've tried to make a simple example to run in the visual profiler but it always returns noncoalesced reads. If anyone could shed some light on this I would be really grateful, thanks.
#include <stdio.h>
#include <cuda_runtime_api.h>
__global__ void kernel(float2 *in, float2 *out) {
int idx=blockIdx.x*blockDim.x+threadIdx.x;
float2 d=in[idx];
d.x = 100.f;
out[idx] = d;
}
int main() {
const int dataSize=32;
float2 *in;
cudaMalloc((void**)&in,dataSize*sizeof(float2));
float2 *out;
cudaMalloc((void**)&out,dataSize*sizeof(float2));
kernel<<<1,32>>>(in,out);
return 0;
}
