CUDA timing

cuda_timer.cu

// GPU timing example
// uses CUDA_SAFE_CALL [https://gist.github.com/waltner/ece68738c42d38c5e9bd1862c43b1146.js]

float elapsed_time = 0.0;

cudaEvent_t start, stop;
CUDA_SAFE_CALL(cudaEventCreate(&start));
CUDA_SAFE_CALL(cudaEventCreate(&stop));
CUDA_SAFE_CALL(cudaEventRecord(start,0));

// DO STUFF ...

CUDA_SAFE_CALL(cudaEventRecord(stop,0));
CUDA_SAFE_CALL(cudaEventSynchronize(stop));
CUDA_SAFE_CALL(cudaEventElapsedTime(&elapsedTime,start,stop));

printf("Runtime (GPU):  %3.1f ms\n", elapsed_time);

CUDA_SAFE_CALL(cudaEventDestroy(start));
CUDA_SAFE_CALL(cudaEventDestroy(stop));