stat = cublasSetVector(size,sizeof(double),h_arrayA,1,d_arrayA,1);
stat = cublasSetVector(size,sizeof(double),h_arrayB,1,d_arrayB,1);
int nbBlocs=(size+nbThreadsPerBloc-1)/nbThreadsPerBloc;
stat = cublasSetVector(size,sizeof(double),h_arrayA,1,d_arrayA,1);
stat = cublasSetVector(size,sizeof(double),h_arrayB,1,d_arrayB,1);
int nbBlocs=(size+nbThreadsPerBloc-1)/nbThreadsPerBloc;