How do I use local memory in OpenCL?
- by splicer
I've been playing with OpenCL recently, and I'm able to write simple kernels that use only global memory. Now I'd like to start using local memory, but I can't seem to figure out how to use get_local_size() and get_local_id() to compute one "chunk" of output at a time.
For example, let's say I wanted to convert Apple's OpenCL Hello World example kernel to something the uses local memory. How would you do it? Here's the original kernel source:
__kernel square(
__global float *input,
__global float *output,
const unsigned int count)
{
int i = get_global_id(0);
if (i < count)
output[i] = input[i] * input[i];
}
If this example can't easily be converted into something that shows how to make use of local memory, any other simple example will do.
Thanks!
