int main(int argc, char **argv)
{
// OP initialisation
op_init(argc,argv,2);
//MPI for user I/O
int my_rank;
int comm_size;
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
MPI_Comm_size(MPI_COMM_WORLD, &comm_size);
//timer
double cpu_t1, cpu_t2, wall_t1, wall_t2;
int *pp;
double *A, *r, *u, *du;
int nnode, nedge;
/**------------------------BEGIN I/O and PARTITIONING ---------------------**/
int g_nnode, g_nedge, g_n, g_e;
g_nnode = (NN-1)*(NN-1);
g_nedge = (NN-1)*(NN-1) + 4*(NN-1)*(NN-2);
int *g_pp = 0;
double *g_A = 0, *g_r = 0, *g_u = 0, *g_du = 0;
op_printf("Global number of nodes, edges = %d, %d\n",g_nnode,g_nedge);
if(my_rank == MPI_ROOT) {
g_pp = (int *)malloc(sizeof(int)*2*g_nedge);
g_A = (double *)malloc(sizeof(double)*g_nedge);
g_r = (double *)malloc(sizeof(double)*g_nnode);
g_u = (double *)malloc(sizeof(double)*g_nnode);
g_du = (double *)malloc(sizeof(double)*g_nnode);
// create matrix and r.h.s., and set coordinates needed for renumbering / partitioning
g_e = 0;
for (int i=1; i<NN; i++) {
for (int j=1; j<NN; j++) {
g_n = i-1 + (j-1)*(NN-1);
g_r[g_n] = 0.0f;
g_u[g_n] = 0.0f;
g_du[g_n] = 0.0f;
g_pp[2*g_e] = g_n;
g_pp[2*g_e+1] = g_n;
g_A[g_e] = -1.0f;
g_e++;
for (int pass=0; pass<4; pass++) {
int i2 = i;
int j2 = j;
if (pass==0) i2 += -1;
if (pass==1) i2 += 1;
if (pass==2) j2 += -1;
if (pass==3) j2 += 1;
if ( (i2==0) || (i2==NN) || (j2==0) || (j2==NN) ) {
g_r[g_n] += 0.25f;
}
else {
g_pp[2*g_e] = g_n;
g_pp[2*g_e+1] = i2-1 + (j2-1)*(NN-1);
g_A[g_e] = 0.25f;
g_e++;
}
}
}
}
}
/* Compute local sizes */
nnode = compute_local_size (g_nnode, comm_size, my_rank);
nedge = compute_local_size (g_nedge, comm_size, my_rank);
op_printf("Number of nodes, edges on process %d = %d, %d\n"
,my_rank,nnode,nedge);
/*Allocate memory to hold local sets, mapping tables and data*/
pp = (int *)malloc(2*sizeof(int)*nedge);
A = (double *) malloc(nedge*sizeof(double));
r = (double *) malloc(nnode*sizeof(double));
u = (double *) malloc(nnode*sizeof(double));
du = (double *) malloc(nnode*sizeof(double));
/* scatter sets, mappings and data on sets*/
scatter_int_array(g_pp, pp, comm_size, g_nedge,nedge, 2);
scatter_double_array(g_A, A, comm_size, g_nedge,nedge, 1);
scatter_double_array(g_r, r, comm_size, g_nnode,nnode, 1);
scatter_double_array(g_u, u, comm_size, g_nnode,nnode, 1);
scatter_double_array(g_du, du, comm_size, g_nnode,nnode, 1);
/*Freeing memory allocated to gloabal arrays on rank 0
after scattering to all processes*/
if(my_rank == MPI_ROOT) {
free(g_pp);
free(g_A);
free(g_r);
free(g_u);
free(g_du);
}
/**------------------------END I/O and PARTITIONING ---------------------**/
// declare sets, pointers, and datasets
op_set nodes = op_decl_set(nnode,"nodes");
op_set edges = op_decl_set(nedge,"edges");
op_map ppedge = op_decl_map(edges,nodes,2,pp, "ppedge");
op_dat p_A = op_decl_dat(edges,1,"double", A, "p_A" );
op_dat p_r = op_decl_dat(nodes,1,"double", r, "p_r" );
op_dat p_u = op_decl_dat(nodes,1,"double", u, "p_u" );
op_dat p_du = op_decl_dat(nodes,1,"double", du,"p_du");
alpha = 1.0f;
op_decl_const(1,"double",&alpha);
op_diagnostic_output();
//trigger partitioning and halo creation routines
op_partition("PTSCOTCH", "KWAY", NULL, NULL, NULL);
//initialise timers for total execution wall time
op_timers(&cpu_t1, &wall_t1);
// main iteration loop
double u_sum, u_max, beta = 1.0f;
for (int iter=0; iter<NITER; iter++) {
op_par_loop(res,"res", edges,
op_arg_dat(p_A, -1,OP_ID, 1,"double", OP_READ),
op_arg_dat(p_u, 1,ppedge, 1,"double", OP_READ),
op_arg_dat(p_du, 0,ppedge, 1,"double", OP_INC),
op_arg_gbl(&beta, 1,"double", OP_READ));
u_sum = 0.0f;
u_max = 0.0f;
op_par_loop(update,"update", nodes,
op_arg_dat(p_r, -1,OP_ID, 1,"double",OP_READ),
op_arg_dat(p_du, -1,OP_ID, 1,"double",OP_RW),
op_arg_dat(p_u, -1,OP_ID, 1,"double",OP_INC),
op_arg_gbl(&u_sum,1,"double",OP_INC),
op_arg_gbl(&u_max,1,"double",OP_MAX));
op_printf("\n u max/rms = %f %f \n\n",u_max, sqrt(u_sum/g_nnode));
}
op_timers(&cpu_t2, &wall_t2);
//get results data array
op_fetch_data(p_u, u);
//output the result dat array to files
op_print_dat_to_txtfile(p_u, "out_grid_mpi.dat"); //ASCI
op_print_dat_to_binfile(p_u, "out_grid_mpi.bin"); //Binary
printf("solution on rank %d\n", my_rank);
for (int i = 0; i<nnode; i++) {
printf(" %7.4f",u[i]);fflush(stdout);
}
printf("\n");
//print each mpi process's timing info for each kernel
op_timing_output();
//print total time for niter interations
op_printf("Max total runtime = %f\n",wall_t2-wall_t1);
//gather results from all ranks and check
double* ug = (double *)malloc(sizeof(double)*op_get_size(nodes));
op_fetch_data_hdf5(p_u, ug, 0, op_get_size(nodes)-1);
int result = check_result<double>(ug, NN, TOLERANCE);
free(ug);
op_exit();
free(u);
free(pp);
free(A);
free(r);
free(du);
return result;
}
int main(int argc, char **argv)
{
MPI_Init(&argc, &argv);
int rank, size;
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
int *groups = (int *)malloc(size * sizeof(int));
int *groups2 = (int *)malloc(size * sizeof(int));
int my_type = 1; //This is to be read from a configuration file
MPI_Allgather(&my_type, 1, MPI_INT, groups, 1, MPI_INT, MPI_COMM_WORLD);
int num_groups = 0;
for (int i = 0; i < size; i++) num_groups = num_groups > groups[i] ? num_groups : groups[i];
num_groups++;
//The global group
MPI_Group global_grp;
MPI_Comm_group(MPI_COMM_WORLD, &global_grp);
//Create sub-groups and sub-communicators
MPI_Group mpigroups[num_groups];
MPI_Comm mpicomms[num_groups];
int count = 0;
for (int i = 0; i < num_groups; ++i) {
count = 0;
for (int j = 0; j < size; ++j) {
if (groups[j] == i) {
groups2[count++] = j;
}
}
MPI_Group_incl(global_grp, count, groups2, &mpigroups[i]);
MPI_Comm_create(MPI_COMM_WORLD, mpigroups[i], &mpicomms[i]);
}
//coupling procs
for (int i = 0; i < 1; ++i) {
count = 0;
for (int j = 0; j < size; ++j) {
if (groups[j] == i) {
groups2[count++] = j;
}
}
}
// OP initialisation
op_mpi_init(argc,argv,2,MPI_COMM_WORLD, mpicomms[1]);
int niter;
double rms;
//timer
double cpu_t1, cpu_t2, wall_t1, wall_t2;
// set constants and initialise flow field and residual
op_printf("initialising flow field \n");
char file[] = "new_grid.h5";
// declare sets, pointers, datasets and global constants
op_set nodes = op_decl_set_hdf5(file, "nodes");
op_set edges = op_decl_set_hdf5(file, "edges");
op_set bedges = op_decl_set_hdf5(file, "bedges");
op_set cells = op_decl_set_hdf5(file, "cells");
op_map pedge = op_decl_map_hdf5(edges, nodes, 2, file, "pedge");
op_map pecell = op_decl_map_hdf5(edges, cells,2, file, "pecell");
op_map pbedge = op_decl_map_hdf5(bedges,nodes,2, file, "pbedge");
op_map pbecell = op_decl_map_hdf5(bedges,cells,1, file, "pbecell");
op_map pcell = op_decl_map_hdf5(cells, nodes,4, file, "pcell");
op_map pbndbnd = op_decl_map_hdf5(bedges, bedges,1, file, "pbndbnd");
op_map m_test = op_decl_map_hdf5(cells, nodes,4, file, "m_test");
if (m_test == NULL) printf("m_test not found\n");
op_dat p_bound = op_decl_dat_hdf5(bedges,1,"int" ,file,"p_bound");
op_dat p_x = op_decl_dat_hdf5(nodes ,2,"double",file,"p_x");
op_dat p_q = op_decl_dat_hdf5(cells ,4,"double",file,"p_q");
op_dat p_qold = op_decl_dat_hdf5(cells ,4,"double",file,"p_qold");
op_dat p_adt = op_decl_dat_hdf5(cells ,1,"double",file,"p_adt");
op_dat p_res = op_decl_dat_hdf5(cells ,4,"double",file,"p_res");
op_dat p_test = op_decl_dat_hdf5(cells ,4,"double",file,"p_test");
if (p_test == NULL) printf("p_test not found\n");
op_get_const_hdf5("gam", 1, "double", (char *)&gam, "new_grid.h5");
op_get_const_hdf5("gm1", 1, "double", (char *)&gm1, "new_grid.h5");
op_get_const_hdf5("cfl", 1, "double", (char *)&cfl, "new_grid.h5");
op_get_const_hdf5("eps", 1, "double", (char *)&eps, "new_grid.h5");
op_get_const_hdf5("mach", 1, "double", (char *)&mach, "new_grid.h5");
op_get_const_hdf5("alpha", 1, "double", (char *)&alpha, "new_grid.h5");
op_get_const_hdf5("qinf", 4, "double", (char *)&qinf, "new_grid.h5");
op_decl_const(1,"double",&gam );
op_decl_const(1,"double",&gm1 );
op_decl_const(1,"double",&cfl );
op_decl_const(1,"double",&eps );
op_decl_const(1,"double",&mach );
op_decl_const(1,"double",&alpha);
op_decl_const(4,"double",qinf );
op_diagnostic_output();
//write back original data just to compare you read the file correctly
//do an h5diff between new_grid_out.h5 and new_grid.h5 to
//compare two hdf5 files
op_dump_to_hdf5("new_grid_out.h5");
op_write_const_hdf5("gam",1,"double",(char *)&gam, "new_grid_out.h5");
op_write_const_hdf5("gm1",1,"double",(char *)&gm1, "new_grid_out.h5");
op_write_const_hdf5("cfl",1,"double",(char *)&cfl, "new_grid_out.h5");
op_write_const_hdf5("eps",1,"double",(char *)&eps, "new_grid_out.h5");
op_write_const_hdf5("mach",1,"double",(char *)&mach, "new_grid_out.h5");
op_write_const_hdf5("alpha",1,"double",(char *)&alpha, "new_grid_out.h5");
op_write_const_hdf5("qinf",4,"double",(char *)qinf, "new_grid_out.h5");
//trigger partitioning and halo creation routines
op_partition("PTSCOTCH", "KWAY", edges, pecell, p_x);
//op_partition("PARMETIS", "KWAY", edges, pecell, p_x);
int g_ncell = op_get_size(cells);
//create some temporaries so we can exchange data defined on the boundary
double *ptr = NULL;
op_dat center = op_decl_dat_temp(bedges, 3, "double", ptr, "center");
op_dat pres = op_decl_dat_temp(bedges, 1, "double", ptr, "pres");
int *ptr2 = NULL;
op_dat p_bound2 = op_decl_dat_temp(bedges, 1, "int", ptr2, "p_bound2");
op_dat center2 = op_decl_dat_temp(bedges, 3, "double", ptr, "center2");
op_dat pres2 = op_decl_dat_temp(bedges, 1, "double", ptr, "pres2");
//create import and export handles
op_export_handle handle = op_export_init(count, groups2, pbndbnd);
op_import_handle handle2 = op_import_init(count, groups2, center);
//initialise timers for total execution wall time
op_timers(&cpu_t1, &wall_t1);
// main time-marching loop
niter = 1000;
for(int iter=1; iter<=niter; iter++) {
// save old flow solution
op_par_loop(save_soln,"save_soln", cells,
op_arg_dat(p_q, -1,OP_ID, 4,"double",OP_READ ),
op_arg_dat(p_qold,-1,OP_ID, 4,"double",OP_WRITE));
// predictor/corrector update loop
for(int k=0; k<2; k++) {
// calculate area/timstep
op_par_loop(adt_calc,"adt_calc",cells,
op_arg_dat(p_x, 0,pcell, 2,"double",OP_READ ),
op_arg_dat(p_x, 1,pcell, 2,"double",OP_READ ),
op_arg_dat(p_x, 2,pcell, 2,"double",OP_READ ),
op_arg_dat(p_x, 3,pcell, 2,"double",OP_READ ),
op_arg_dat(p_q, -1,OP_ID, 4,"double",OP_READ ),
op_arg_dat(p_adt,-1,OP_ID, 1,"double",OP_WRITE));
// calculate flux residual
op_par_loop(res_calc,"res_calc",edges,
op_arg_dat(p_x, 0,pedge, 2,"double",OP_READ),
op_arg_dat(p_x, 1,pedge, 2,"double",OP_READ),
op_arg_dat(p_q, 0,pecell,4,"double",OP_READ),
op_arg_dat(p_q, 1,pecell,4,"double",OP_READ),
op_arg_dat(p_adt, 0,pecell,1,"double",OP_READ),
op_arg_dat(p_adt, 1,pecell,1,"double",OP_READ),
op_arg_dat(p_res, 0,pecell,4,"double",OP_INC ),
op_arg_dat(p_res, 1,pecell,4,"double",OP_INC ));
op_par_loop(bres_calc,"bres_calc",bedges,
op_arg_dat(p_x, 0,pbedge, 2,"double",OP_READ),
op_arg_dat(p_x, 1,pbedge, 2,"double",OP_READ),
op_arg_dat(p_q, 0,pbecell,4,"double",OP_READ),
op_arg_dat(p_adt, 0,pbecell,1,"double",OP_READ),
op_arg_dat(p_res, 0,pbecell,4,"double",OP_INC ),
op_arg_dat(p_bound,-1,OP_ID ,1,"int", OP_READ),
op_arg_dat(center, -1, OP_ID, 3, "double", OP_WRITE),
op_arg_dat(pres, -1, OP_ID, 1, "double", OP_WRITE));
// update flow field
rms = 0.0;
op_par_loop(update,"update",cells,
op_arg_dat(p_qold,-1,OP_ID, 4,"double",OP_READ ),
op_arg_dat(p_q, -1,OP_ID, 4,"double",OP_WRITE),
op_arg_dat(p_res, -1,OP_ID, 4,"double",OP_RW ),
op_arg_dat(p_adt, -1,OP_ID, 1,"double",OP_READ ),
op_arg_gbl(&rms,1,"double",OP_INC));
}
// print iteration history
rms = sqrt(rms/(double)g_ncell);
if (iter%100 == 0) {
op_printf(" %d %10.5e \n",iter,rms);
//Export data
op_dat arr[] = {p_bound, center, pres};
op_export_data(handle, 3, arr);
//Import data
op_dat arr2[] = {p_bound2, center2, pres2};
op_import_data(handle2, 3, arr2);
//check whether the two are the same
op_par_loop(comparethem, "comparethem", bedges,
op_arg_dat(p_bound,-1, OP_ID, 1, "int", OP_READ),
op_arg_dat(p_bound2,-1, OP_ID, 1, "int", OP_READ),
op_arg_dat(center,-1, OP_ID, 3, "double", OP_READ),
op_arg_dat(center2,-1, OP_ID, 3, "double", OP_READ),
op_arg_dat(pres,-1, OP_ID, 1, "double", OP_READ),
op_arg_dat(pres2,-1, OP_ID, 1, "double", OP_READ));
}
}
op_timers(&cpu_t2, &wall_t2);
double* q = (double *)malloc(sizeof(double)*op_get_size(cells)*4);
op_fetch_data_hdf5(p_q, q, 0, op_get_size(cells)-1);
free(q);
op_fetch_data_hdf5_file(p_q, "file_name.h5");
//printf("Root process = %d\n",op_is_root());
//output the result dat array to files
//op_write_hdf5("new_grid_out.h5");
//compress using
// ~/hdf5/bin/h5repack -f GZIP=9 new_grid.h5 new_grid_pack.h5
op_timing_output();
op_printf("Max total runtime = \n%f\n",wall_t2-wall_t1);
op_exit();
}
int main(int argc, char **argv)
{
// OP initialisation
op_init(argc,argv,2);
int niter;
double rms;
//timer
double cpu_t1, cpu_t2, wall_t1, wall_t2;
// set constants and initialise flow field and residual
op_printf("initialising flow field \n");
char file[] = "new_grid.h5";
// declare sets, pointers, datasets and global constants
op_set nodes = op_decl_set_hdf5(file, "nodes");
op_set edges = op_decl_set_hdf5(file, "edges");
op_set bedges = op_decl_set_hdf5(file, "bedges");
op_set cells = op_decl_set_hdf5(file, "cells");
op_map pedge = op_decl_map_hdf5(edges, nodes, 2, file, "pedge");
op_map pecell = op_decl_map_hdf5(edges, cells,2, file, "pecell");
op_map pbedge = op_decl_map_hdf5(bedges,nodes,2, file, "pbedge");
op_map pbecell = op_decl_map_hdf5(bedges,cells,1, file, "pbecell");
op_map pcell = op_decl_map_hdf5(cells, nodes,4, file, "pcell");
op_map m_test = op_decl_map_hdf5(cells, nodes,4, file, "m_test");
if (m_test == NULL) printf("m_test not found\n");
op_dat p_bound = op_decl_dat_hdf5(bedges,1,"int" ,file,"p_bound");
op_dat p_x = op_decl_dat_hdf5(nodes ,2,"double",file,"p_x");
op_dat p_q = op_decl_dat_hdf5(cells ,4,"double",file,"p_q");
op_dat p_qold = op_decl_dat_hdf5(cells ,4,"double",file,"p_qold");
op_dat p_adt = op_decl_dat_hdf5(cells ,1,"double",file,"p_adt");
op_dat p_res = op_decl_dat_hdf5(cells ,4,"double",file,"p_res");
op_dat p_test = op_decl_dat_hdf5(cells ,4,"double",file,"p_test");
if (p_test == NULL) printf("p_test not found\n");
op_get_const_hdf5("gam", 1, "double", (char *)&gam, "new_grid.h5");
op_get_const_hdf5("gm1", 1, "double", (char *)&gm1, "new_grid.h5");
op_get_const_hdf5("cfl", 1, "double", (char *)&cfl, "new_grid.h5");
op_get_const_hdf5("eps", 1, "double", (char *)&eps, "new_grid.h5");
op_get_const_hdf5("mach", 1, "double", (char *)&mach, "new_grid.h5");
op_get_const_hdf5("alpha", 1, "double", (char *)&alpha, "new_grid.h5");
op_get_const_hdf5("qinf", 4, "double", (char *)&qinf, "new_grid.h5");
op_decl_const2("gam",1,"double",&gam);
op_decl_const2("gm1",1,"double",&gm1);
op_decl_const2("cfl",1,"double",&cfl);
op_decl_const2("eps",1,"double",&eps);
op_decl_const2("mach",1,"double",&mach);
op_decl_const2("alpha",1,"double",&alpha);
op_decl_const2("qinf",4,"double",qinf);
op_diagnostic_output();
//write back original data just to compare you read the file correctly
//do an h5diff between new_grid_out.h5 and new_grid.h5 to
//compare two hdf5 files
op_dump_to_hdf5("new_grid_out.h5");
op_write_const_hdf5("gam",1,"double",(char *)&gam, "new_grid_out.h5");
op_write_const_hdf5("gm1",1,"double",(char *)&gm1, "new_grid_out.h5");
op_write_const_hdf5("cfl",1,"double",(char *)&cfl, "new_grid_out.h5");
op_write_const_hdf5("eps",1,"double",(char *)&eps, "new_grid_out.h5");
op_write_const_hdf5("mach",1,"double",(char *)&mach, "new_grid_out.h5");
op_write_const_hdf5("alpha",1,"double",(char *)&alpha, "new_grid_out.h5");
op_write_const_hdf5("qinf",4,"double",(char *)qinf, "new_grid_out.h5");
//trigger partitioning and halo creation routines
op_partition("PTSCOTCH", "KWAY", edges, pecell, p_x);
//op_partition("PARMETIS", "KWAY", edges, pecell, p_x);
int g_ncell = op_get_size(cells);
//initialise timers for total execution wall time
op_timers(&cpu_t1, &wall_t1);
// main time-marching loop
niter = 1000;
for(int iter=1; iter<=niter; iter++) {
// save old flow solution
op_par_loop_save_soln("save_soln",cells,
op_arg_dat(p_q,-1,OP_ID,4,"double",OP_READ),
op_arg_dat(p_qold,-1,OP_ID,4,"double",OP_WRITE));
// predictor/corrector update loop
for(int k=0; k<2; k++) {
// calculate area/timstep
op_par_loop_adt_calc("adt_calc",cells,
op_arg_dat(p_x,0,pcell,2,"double",OP_READ),
op_arg_dat(p_x,1,pcell,2,"double",OP_READ),
op_arg_dat(p_x,2,pcell,2,"double",OP_READ),
op_arg_dat(p_x,3,pcell,2,"double",OP_READ),
op_arg_dat(p_q,-1,OP_ID,4,"double",OP_READ),
op_arg_dat(p_adt,-1,OP_ID,1,"double",OP_WRITE));
// calculate flux residual
op_par_loop_res_calc("res_calc",edges,
op_arg_dat(p_x,0,pedge,2,"double",OP_READ),
op_arg_dat(p_x,1,pedge,2,"double",OP_READ),
op_arg_dat(p_q,0,pecell,4,"double",OP_READ),
op_arg_dat(p_q,1,pecell,4,"double",OP_READ),
op_arg_dat(p_adt,0,pecell,1,"double",OP_READ),
op_arg_dat(p_adt,1,pecell,1,"double",OP_READ),
op_arg_dat(p_res,0,pecell,4,"double",OP_INC),
op_arg_dat(p_res,1,pecell,4,"double",OP_INC));
op_par_loop_bres_calc("bres_calc",bedges,
op_arg_dat(p_x,0,pbedge,2,"double",OP_READ),
op_arg_dat(p_x,1,pbedge,2,"double",OP_READ),
op_arg_dat(p_q,0,pbecell,4,"double",OP_READ),
op_arg_dat(p_adt,0,pbecell,1,"double",OP_READ),
op_arg_dat(p_res,0,pbecell,4,"double",OP_INC),
op_arg_dat(p_bound,-1,OP_ID,1,"int",OP_READ));
// update flow field
rms = 0.0;
op_par_loop_update("update",cells,
op_arg_dat(p_qold,-1,OP_ID,4,"double",OP_READ),
op_arg_dat(p_q,-1,OP_ID,4,"double",OP_WRITE),
op_arg_dat(p_res,-1,OP_ID,4,"double",OP_RW),
op_arg_dat(p_adt,-1,OP_ID,1,"double",OP_READ),
op_arg_gbl(&rms,1,"double",OP_INC));
}
// print iteration history
rms = sqrt(rms/(double)g_ncell);
if (iter%100 == 0)
op_printf(" %d %10.5e \n",iter,rms);
}
op_timers(&cpu_t2, &wall_t2);
double* q = (double *)malloc(sizeof(double)*op_get_size(cells)*4);
op_fetch_data_hdf5(p_q, q, 0, op_get_size(cells)-1);
free(q);
op_fetch_data_hdf5_file(p_q, "file_name.h5");
//printf("Root process = %d\n",op_is_root());
//output the result dat array to files
//op_write_hdf5("new_grid_out.h5");
//compress using
// ~/hdf5/bin/h5repack -f GZIP=9 new_grid.h5 new_grid_pack.h5
op_timing_output();
op_printf("Max total runtime = \n%f\n",wall_t2-wall_t1);
op_exit();
}