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CUDA Utilities
Utilities for CUDA programming
Wrap all the CUDA API calls within gpuErrchk
. For example:
gpuErrchk(cudaMemcpy(d_x, x, N * sizeof(float), cudaMemcpyHostToDevice));
Use gpuErrchk
to check for errors in your kernels. For example:
#ifdef DEBUG
gpuErrchk(cudaPeekAtLastError());
gpuErrchk(cudaDeviceSynchronize());
#endif
If DEBUG
is defined, then the CUDA error check of the kernels will be executed.
Use iDivUp
to find the number of blocks to be launched by a CUDA kernel. For example:
BLOCKSIZE = 256;
N = 10000; // Number of elements to be processed
kernel<<<iDivUp(N, BLOCKSIZE), BLOCKSIZE>>>(...);