Tutorial CUDA

Back to Reduce Exercise:
Problem with Reduce 2
Reduce 2 does not take advantage of shared memory!
Reduce 3 fixes this by implementing parallel
reduction in shared memory
Runtime shared memory allocation:
size_t SharedMemBytes = 64; // 64 bytes of shared memory
KernelFunc>(...);
© NVIDIA Corporation 2008
The optional SharedMemBytes bytes are:
Allocated in addition to the compiler allocated shared memory
Mapped to any variable declared as:
extern __shared__ float DynamicSharedMem[];