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_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_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_write_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);
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, -4,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, -2,pedge, 2,"double",OP_READ),
op_arg_dat(p_q, -2,pecell,4,"double",OP_READ),
op_arg_dat(p_adt, -2,pecell,1,"double",OP_READ),
op_arg_dat(p_res, -2,pecell,4,"double",OP_INC ));
op_par_loop(bres_calc,"bres_calc",bedges,
op_arg_dat(p_x, -2,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);
op_timing_output();
op_printf("Max total runtime = \n%f\n",wall_t2-wall_t1);
op_exit();
}
//
// main program
//
int main(int argc, char **argv){
int my_rank;
int comm_size;
MPI_Init(&argc, &argv);
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;
double time;
double max_time;
int *becell, *ecell, *bound, *bedge, *edge, *cell;
double *x, *q, *qold, *adt, *res;
int niter;
double rms;
op_timers(&cpu_t1, &wall_t1);
// set constants
if(my_rank == MPI_ROOT )printf("initialising flow field\n");
gam = 1.4f;
gm1 = gam - 1.0f;
cfl = 0.9f;
eps = 0.05f;
double mach = 0.4f;
double alpha = 3.0f*atan(1.0f)/45.0f;
double p = 1.0f;
double r = 1.0f;
double u = sqrt(gam*p/r)*mach;
double e = p/(r*gm1) + 0.5f*u*u;
qinf[0] = r;
qinf[1] = r*u;
qinf[2] = 0.0f;
qinf[3] = r*e;
// OP initialisation
op_init(argc,argv,2);
/**------------------------BEGIN Parallel I/O -------------------**/
char file[] = "new_grid.h5";//"new_grid-26mil.h5";//"new_grid.h5";
// declare sets, pointers, datasets and global constants - reading in from file
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_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");
/**------------------------END Parallel I/O -----------------------**/
op_timers(&cpu_t2, &wall_t2);
time = wall_t2-wall_t1;
MPI_Reduce(&time,&max_time,1,MPI_DOUBLE, MPI_MAX,MPI_ROOT, MPI_COMM_WORLD);
if(my_rank==MPI_ROOT)printf("Max total file read time = %f\n",max_time);
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_writeback.h5 and new_grid.h5 to
//compare two hdf5 files
op_write_hdf5("new_grid_out.h5");
//partition with ParMetis
//op_partition_geom(p_x);
//op_partition_random(cells);
//op_partition_kway(pecell);
//op_partition_geomkway(p_x, pcell);
//partition with PT-Scotch
op_partition_ptscotch(pecell);
//create halos
op_halo_create();
int g_ncell = 0;
int* sizes = (int *)malloc(sizeof(int)*comm_size);
MPI_Allgather(&cells->size, 1, MPI_INT, sizes, 1, MPI_INT, MPI_COMM_WORLD);
for(int i = 0; i<comm_size; i++)g_ncell = g_ncell + sizes[i];
free(sizes);
//initialise timers for total execution wall time
op_timers(&cpu_t1, &wall_t1);
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
if(my_rank==MPI_ROOT)
{
rms = sqrt(rms/(double) g_ncell);
if (iter%100 == 0)
printf("%d %10.5e \n",iter,rms);
}
}
op_timers(&cpu_t2, &wall_t2);
//get results data array
op_dat temp = op_mpi_get_data(p_q);
//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
//free memory allocated to halos
op_halo_destroy();
//return all op_dats, op_maps back to original element order
op_partition_reverse();
//print each mpi process's timing info for each kernel
op_mpi_timing_output();
//print total time for niter interations
time = wall_t2-wall_t1;
MPI_Reduce(&time,&max_time,1,MPI_DOUBLE, MPI_MAX,MPI_ROOT, MPI_COMM_WORLD);
if(my_rank==MPI_ROOT)printf("Max total runtime = %f\n",max_time);
op_exit();
MPI_Finalize(); //user mpi finalize
}
int main(int argc, char **argv)
{
int my_rank;
int comm_size;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
MPI_Comm_size(MPI_COMM_WORLD, &comm_size);
int *becell, *ecell, *bound, *bedge, *edge, *cell;
double *x, *q, *qold, *adt, *res;
int nnode,ncell,nedge,nbedge;
/**------------------------BEGIN I/O -------------------**/
char file[] = "new_grid-26mil.dat";
char file_out[] = "new_grid_out.h5";
/* read in grid from disk on root processor */
FILE *fp;
if ( (fp = fopen(file,"r")) == NULL) {
printf("can't open file %s\n",file); exit(-1);
}
int g_nnode,g_ncell,g_nedge,g_nbedge;
check_scan(fscanf(fp,"%d %d %d %d \n",&g_nnode, &g_ncell, &g_nedge, &g_nbedge), 4);
int *g_becell = 0, *g_ecell = 0, *g_bound = 0, *g_bedge = 0, *g_edge = 0, *g_cell = 0;
double *g_x = 0,*g_q = 0, *g_qold = 0, *g_adt = 0, *g_res = 0;
// set constants
if(my_rank == MPI_ROOT )printf("initialising flow field\n");
gam = 1.4f;
gm1 = gam - 1.0f;
cfl = 0.9f;
eps = 0.05f;
double mach = 0.4f;
double alpha = 3.0f*atan(1.0f)/45.0f;
double p = 1.0f;
double r = 1.0f;
double u = sqrt(gam*p/r)*mach;
double e = p/(r*gm1) + 0.5f*u*u;
qinf[0] = r;
qinf[1] = r*u;
qinf[2] = 0.0f;
qinf[3] = r*e;
if(my_rank == MPI_ROOT) {
printf("reading in grid \n");
printf("Global number of nodes, cells, edges, bedges = %d, %d, %d, %d\n"
,g_nnode,g_ncell,g_nedge,g_nbedge);
g_cell = (int *) malloc(4*g_ncell*sizeof(int));
g_edge = (int *) malloc(2*g_nedge*sizeof(int));
g_ecell = (int *) malloc(2*g_nedge*sizeof(int));
g_bedge = (int *) malloc(2*g_nbedge*sizeof(int));
g_becell = (int *) malloc( g_nbedge*sizeof(int));
g_bound = (int *) malloc( g_nbedge*sizeof(int));
g_x = (double *) malloc(2*g_nnode*sizeof(double));
g_q = (double *) malloc(4*g_ncell*sizeof(double));
g_qold = (double *) malloc(4*g_ncell*sizeof(double));
g_res = (double *) malloc(4*g_ncell*sizeof(double));
g_adt = (double *) malloc( g_ncell*sizeof(double));
for (int n=0; n<g_nnode; n++){
check_scan(fscanf(fp,"%lf %lf \n",&g_x[2*n], &g_x[2*n+1]), 2);
}
for (int n=0; n<g_ncell; n++) {
check_scan(fscanf(fp,"%d %d %d %d \n",&g_cell[4*n ], &g_cell[4*n+1],
&g_cell[4*n+2], &g_cell[4*n+3]), 4);
}
for (int n=0; n<g_nedge; n++) {
check_scan(fscanf(fp,"%d %d %d %d \n",&g_edge[2*n],&g_edge[2*n+1],
&g_ecell[2*n],&g_ecell[2*n+1]), 4);
}
for (int n=0; n<g_nbedge; n++) {
check_scan(fscanf(fp,"%d %d %d %d \n",&g_bedge[2*n],&g_bedge[2*n+1],
&g_becell[n],&g_bound[n]), 4);
}
//initialise flow field and residual
for (int n=0; n<g_ncell; n++) {
for (int m=0; m<4; m++) {
g_q[4*n+m] = qinf[m];
g_res[4*n+m] = 0.0f;
}
}
}
fclose(fp);
nnode = compute_local_size (g_nnode, comm_size, my_rank);
ncell = compute_local_size (g_ncell, comm_size, my_rank);
nedge = compute_local_size (g_nedge, comm_size, my_rank);
nbedge = compute_local_size (g_nbedge, comm_size, my_rank);
printf("Number of nodes, cells, edges, bedges on process %d = %d, %d, %d, %d\n"
,my_rank,nnode,ncell,nedge,nbedge);
//Allocate memory to hold local sets, mapping tables and data
cell = (int *) malloc(4*ncell*sizeof(int));
edge = (int *) malloc(2*nedge*sizeof(int));
ecell = (int *) malloc(2*nedge*sizeof(int));
bedge = (int *) malloc(2*nbedge*sizeof(int));
becell = (int *) malloc( nbedge*sizeof(int));
bound = (int *) malloc( nbedge*sizeof(int));
x = (double *) malloc(2*nnode*sizeof(double));
q = (double *) malloc(4*ncell*sizeof(double));
qold = (double *) malloc(4*ncell*sizeof(double));
res = (double *) malloc(4*ncell*sizeof(double));
adt = (double *) malloc( ncell*sizeof(double));
//scatter sets, mappings and data on sets
scatter_int_array(g_cell, cell, comm_size, g_ncell,ncell, 4);
scatter_int_array(g_edge, edge, comm_size, g_nedge,nedge, 2);
scatter_int_array(g_ecell, ecell, comm_size, g_nedge,nedge, 2);
scatter_int_array(g_bedge, bedge, comm_size, g_nbedge,nbedge, 2);
scatter_int_array(g_becell, becell, comm_size, g_nbedge,nbedge, 1);
scatter_int_array(g_bound, bound, comm_size, g_nbedge,nbedge, 1);
scatter_double_array(g_x, x, comm_size, g_nnode,nnode, 2);
scatter_double_array(g_q, q, comm_size, g_ncell,ncell, 4);
scatter_double_array(g_qold, qold, comm_size, g_ncell,ncell, 4);
scatter_double_array(g_res, res, comm_size, g_ncell,ncell, 4);
scatter_double_array(g_adt, adt, comm_size, g_ncell,ncell, 1);
if(my_rank == MPI_ROOT) {
//Freeing memory allocated to gloabal arrays on rank 0
//after scattering to all processes
free(g_cell);
free(g_edge);
free(g_ecell);
free(g_bedge);
free(g_becell);
free(g_bound);
free(g_x ); free(g_q);free(g_qold);free(g_adt);free(g_res);
}
// OP initialisation
op_init(argc,argv,2);
/**------------------------END I/O -----------------------**/
/* FIXME: It's not clear to the compiler that sth. is going on behind the
scenes here. Hence theses variables are reported as unused */
op_set nodes = op_decl_set(nnode, "nodes");
op_set edges = op_decl_set(nedge, "edges");
op_set bedges = op_decl_set(nbedge, "bedges");
op_set cells = op_decl_set(ncell, "cells");
op_map pedge = op_decl_map(edges, nodes,2,edge, "pedge");
op_map pecell = op_decl_map(edges, cells,2,ecell, "pecell");
op_map pbedge = op_decl_map(bedges,nodes,2,bedge, "pbedge");
op_map pbecell = op_decl_map(bedges,cells,1,becell,"pbecell");
op_map pcell = op_decl_map(cells, nodes,4,cell, "pcell");
op_dat p_bound = op_decl_dat(bedges,1,"int" ,bound,"p_bound");
op_dat p_x = op_decl_dat(nodes ,2,"double",x ,"p_x");
op_dat p_q = op_decl_dat(cells ,4,"double",q ,"p_q");
op_dat p_qold = op_decl_dat(cells ,4,"double",qold ,"p_qold");
op_dat p_adt = op_decl_dat(cells ,1,"double",adt ,"p_adt");
op_dat p_res = op_decl_dat(cells ,4,"double",res ,"p_res");
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_write_hdf5(file_out);
op_diagnostic_output();
//create halos - for sanity check
op_halo_create();
op_exit();
MPI_Finalize(); //user mpi finalize
}