@s001-n058:~/vector_addition_cuda$ dpct vector_addition.cu NOTE: Could not auto-detect compilation database for file 'vector_addition.cu' in '/home/u171596/vector_addition_cuda' or any parent directory.
dpct exited with code: -32 (Error: Could not detect path to CUDA header files. Use --cuda-include-path to specify the correct path to the header files.)
u171596@s001-n058:~/vector_addition_cuda$ cat vector_addition.cu
#include</usr/include/linux/cuda.h>
#include <stdio.h>
// Size of array
#define N 1048576
// Kernel
__global__ void add_vectors(double *a, double *b, double *c)
{
int id = blockDim.x * blockIdx.x + threadIdx.x;
if(id < N) c[id] = a[id] + b[id];
}
// Main program
int main()
{
// Number of bytes to allocate for N doubles
size_t bytes = N*sizeof(double);
// Allocate memory for arrays A, B, and C on host
double *A = (double*)malloc(bytes);
double *B = (double*)malloc(bytes);
double *C = (double*)malloc(bytes);
// Allocate memory for arrays d_A, d_B, and d_C on device
double *d_A, *d_B, *d_C;
cudaMalloc(&d_A, bytes);
cudaMalloc(&d_B, bytes);
cudaMalloc(&d_C, bytes);
// Fill host arrays A and B
for(int i=0; i<N; i++)
{
A[i] = 1.0;
B[i] = 2.0;
}
// Copy data from host arrays A and B to device arrays d_A and d_B
cudaMemcpy(d_A, A, bytes, cudaMemcpyHostToDevice);
cudaMemcpy(d_B, B, bytes, cudaMemcpyHostToDevice);
// Set execution configuration parameters
// thr_per_blk: number of CUDA threads per grid block
// blk_in_grid: number of blocks in grid
int thr_per_blk = 256;
int blk_in_grid = ceil( float(N) / thr_per_blk );
// Launch kernel
add_vectors<<< blk_in_grid, thr_per_blk >>>(d_A, d_B, d_C);
// Copy data from device array d_C to host array C
cudaMemcpy(C, d_C, bytes, cudaMemcpyDeviceToHost);
// Verify results
double tolerance = 1.0e-14;
for(int i=0; i<N; i++)
{
if( fabs(C[i] - 3.0) > tolerance)
{
printf("\nError: value of C[%d] = %d instead of 3.0\n\n", i, C[i]);
exit(1);
}
}
// Free CPU memory
free(A);
free(B);
free(C);
// Free GPU memory
cudaFree(d_A);
cudaFree(d_B);
cudaFree(d_C);
printf("\n---------------------------\n");
printf("__SUCCESS__\n");
printf("---------------------------\n");
printf("N = %d\n", N);
printf("Threads Per Block = %d\n", thr_per_blk);
printf("Blocks In Grid = %d\n", blk_in_grid);
printf("---------------------------\n\n");
return 0;
}
