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Is there any ways i can have a function inside cuda kernel. I mean my cuda kernel gets pretty long and hard to debug at one point. Thanks.
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Figure 1 shows that the CUDA kernel is a function that gets executed on GPU. The parallel portion of your applications is executed K times in parallel by K different CUDA threads, as opposed to only one time like regular C/C++ functions. Figure 1. The kernel is a function executed on the GPU.
__global__ : 1. A qualifier added to standard C. This alerts the compiler that a function should be compiled to run on a device (GPU) instead of host (CPU).
kernel cannot allocate, and only isbits types in device arrays: CUDA C has no garbage collection, and Julia has no manual deallocations, let alone on the device to deal with data that live independently of the CuArray. no try-catch-finally in kernel: CUDA C does not support exception handling on device (v11.
yes, just mark function with __device__ and it will be callable only from GPU. Check CUDA Programming guide, section B.1 Here is the direct link
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