typedef struct {
   double* cc_space_v_oo_chol;
   double* cc_space_v_ov_chol;
   double* cc_space_v_vo_chol;
   double* cc_space_v_vv_chol;
   double* cc_space_v_oooo;
   double* cc_space_v_vooo;
   double* cc_space_v_voov;
   double* cc_space_v_oovv;
   double* cc_space_v_vvoo;
   double* cc_space_v_oovo;
   double* cc_space_v_ovvo;
   double* cc_space_v_ovov;
   double* cc_space_v_ovoo;
   double* cc_space_f_oo;
   double* cc_space_f_ov;
   double* cc_space_f_vo;
   double* cc_space_f_vv;
   double* tau;
   double* tau_x;
   double* t1;
   double* t2;
   double* H_oo;
   double* H_vo;
   double* H_vv;
   int nO;
   int nV;
   int cholesky_mo_num;
} gpu_data;

#define MULTIGPU 1