starting Simple Print (CUDA Dynamic Parallelism)
GPU Device 0: "Hopper" with compute capability 9.0

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The CPU launches 2 blocks of 2 threads each. On the device each thread will
launch 2 blocks of 2 threads each. The GPU we will do that recursively
until it reaches max_depth=2

In total 2+8=10 blocks are launched!!! (8 from the GPU)
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Launching cdp_kernel() with CUDA Dynamic Parallelism:

BLOCK 1 launched by the host
BLOCK 0 launched by the host
|  BLOCK 3 launched by thread 0 of block 1
|  BLOCK 2 launched by thread 0 of block 1
|  BLOCK 4 launched by thread 0 of block 0
|  BLOCK 5 launched by thread 0 of block 0
|  BLOCK 7 launched by thread 1 of block 0
|  BLOCK 6 launched by thread 1 of block 0
|  BLOCK 9 launched by thread 1 of block 1
|  BLOCK 8 launched by thread 1 of block 1