Initilize Array to Zero

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello,

Is there anyway to initialize array elements to zero automatically when using cudamalloc or we need to handle that by our own?

thank you
miztaken

2

There is no CUDA equivalent of calloc(), but there is cudaMemset(), which will do what you want reasonably efficiently.

3

thanks for the reply… seems like cudamemset is for int types. i have a float3 1D array which in need to initialize all elements to 0.0f. Can this be done?

4

Yes, you can use cudaMemset() for that. The size argument just needs to be sizeof(float3)*N. That will put 0 into every byte, which is the equivalent of setting every float3 to {0.f,0.f,0.f}.