int main(int argc, const char **argv) {
ops_init(argc, argv, 5);
ops_init_backend();
ops_printf("Hello world from OPS!\n\n");
ops_block block = ops_decl_block_hdf5(3, "grid0", "write_data.h5");
ops_dat single =
ops_decl_dat_hdf5(block, 1, "double", "single", "write_data.h5");
ops_dat multi =
ops_decl_dat_hdf5(block, 2, "double", "multi", "write_data.h5");
ops_dat integ = ops_decl_dat_hdf5(block, 1, "int", "integ", "write_data.h5");
ops_partition("empty_string_that_does_nothing_yet");
ops_diagnostic_output();
ops_fetch_block_hdf5_file(block, "read_data.h5");
ops_fetch_dat_hdf5_file(multi, "read_data.h5");
ops_fetch_dat_hdf5_file(single, "read_data.h5");
ops_fetch_dat_hdf5_file(integ, "read_data.h5");
int my_const;
ops_get_const_hdf5("my_const", 1, "int", (char *)&my_const, "write_data.h5");
printf("Read const: %d\n", my_const);
char buffer[50];
ops_get_const_hdf5("my_text", 11, "char", buffer, "write_data.h5");
printf("Read text: %s\n", buffer);
ops_write_const_hdf5("my_const", 1, "int", (char *)&my_const, "read_data.h5");
ops_write_const_hdf5("my_text", 11, "char", (char *)buffer, "read_data.h5");
ops_timing_output(stdout);
ops_printf("\nSucessful exit from OPS!\n");
ops_exit();
}
int main(int argc, char **argv)
{
/**-------------------------- Initialisation --------------------------**/
// OPS initialisation
ops_init(argc,argv,6);
int logical_size_x = 200;
int logical_size_y = 200;
int ngrid_x = 1;
int ngrid_y = 1;
int n_iter = 10000;
dx = 0.01;
dy = 0.01;
ops_decl_const("dx",1,"double",&dx);
ops_decl_const("dy",1,"double",&dy);
//declare blocks
ops_block *blocks = (ops_block *)malloc(ngrid_x*ngrid_y*sizeof(ops_block*));
char buf[50];
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
sprintf(buf,"block %d,%d",i,j);
blocks[i+ngrid_x*j] = ops_decl_block(2,buf);
}
}
//declare stencils
int s2D_00[] = {0,0};
ops_stencil S2D_00 = ops_decl_stencil( 2, 1, s2D_00, "00");
int s2D_00_P10_M10_0P1_0M1[] = {0,0, 1,0, -1,0, 0,1, 0,-1};
ops_stencil S2D_00_P10_M10_0P1_0M1 = ops_decl_stencil( 2, 5, s2D_00_P10_M10_0P1_0M1, "00:10:-10:01:0-1");
ops_reduction red_err = ops_decl_reduction_handle(sizeof(double), "double", "err");
//declare datasets
int d_p[2] = {1,1}; //max halo depths for the dat in the possitive direction
int d_m[2] = {-1,-1}; //max halo depths for the dat in the negative direction
int base[2] = {0,0};
int uniform_size[2] = {(logical_size_x-1)/ngrid_x+1,(logical_size_y-1)/ngrid_y+1};
double* temp = NULL;
ops_dat *coordx = (ops_dat *)malloc(ngrid_x*ngrid_y*sizeof(ops_dat*));
ops_dat *coordy = (ops_dat *)malloc(ngrid_x*ngrid_y*sizeof(ops_dat*));
ops_dat *u = (ops_dat *)malloc(ngrid_x*ngrid_y*sizeof(ops_dat*));
ops_dat *u2 = (ops_dat *)malloc(ngrid_x*ngrid_y*sizeof(ops_dat*));
ops_dat *f = (ops_dat *)malloc(ngrid_x*ngrid_y*sizeof(ops_dat*));
ops_dat *ref = (ops_dat *)malloc(ngrid_x*ngrid_y*sizeof(ops_dat*));
int *sizes = (int*)malloc(2*ngrid_x*ngrid_y*sizeof(int));
int *disps = (int*)malloc(2*ngrid_x*ngrid_y*sizeof(int));
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
int size[2] = {uniform_size[0], uniform_size[1]};
if ((i+1)*size[0]>logical_size_x) size[0] = logical_size_x - i*size[0];
if ((j+1)*size[1]>logical_size_y) size[1] = logical_size_y - j*size[1];
sprintf(buf,"coordx %d,%d",i,j);
coordx[i+ngrid_x*j] = ops_decl_dat(blocks[i+ngrid_x*j], 1, size, base, d_m, d_p, temp, "double", buf);
sprintf(buf,"coordy %d,%d",i,j);
coordy[i+ngrid_x*j] = ops_decl_dat(blocks[i+ngrid_x*j], 1, size, base, d_m, d_p, temp, "double", buf);
sprintf(buf,"u %d,%d",i,j);
u[i+ngrid_x*j] = ops_decl_dat(blocks[i+ngrid_x*j], 1, size, base, d_m, d_p, temp, "double", buf);
sprintf(buf,"u2 %d,%d",i,j);
u2[i+ngrid_x*j] = ops_decl_dat(blocks[i+ngrid_x*j], 1, size, base, d_m, d_p, temp, "double", buf);
sprintf(buf,"f %d,%d",i,j);
f[i+ngrid_x*j] = ops_decl_dat(blocks[i+ngrid_x*j], 1, size, base, d_m, d_p, temp, "double", buf);
sprintf(buf,"ref %d,%d",i,j);
ref[i+ngrid_x*j] = ops_decl_dat(blocks[i+ngrid_x*j], 1, size, base, d_m, d_p, temp, "double", buf);
sizes[2*(i+ngrid_x*j)] = size[0];
sizes[2*(i+ngrid_x*j)+1] = size[1];
disps[2*(i+ngrid_x*j)] = i*uniform_size[0];
disps[2*(i+ngrid_x*j)+1] = j*uniform_size[1];
}
}
ops_halo *halos = (ops_halo *)malloc(2*(ngrid_x*(ngrid_y-1)+(ngrid_x-1)*ngrid_y)*sizeof(ops_halo *));
int off = 0;
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
if (i > 0) {
int halo_iter[] = {1,sizes[2*(i+ngrid_x*j)+1]};
int base_from[] = {sizes[2*(i-1+ngrid_x*j)]-1,0};
int base_to[] = {-1,0};
int dir[] = {1,2};
halos[off++] = ops_decl_halo(u[i-1+ngrid_x*j], u[i+ngrid_x*j], halo_iter, base_from, base_to, dir, dir);
base_from[0] = 0; base_to[0] = sizes[2*(i+ngrid_x*j)];
halos[off++] = ops_decl_halo(u[i+ngrid_x*j], u[i-1+ngrid_x*j], halo_iter, base_from, base_to, dir, dir);
}
if (j > 0) {
int halo_iter[] = {sizes[2*(i+ngrid_x*j)],1};
int base_from[] = {0,sizes[2*(i+ngrid_x*(j-1))+1]-1};
int base_to[] = {0,-1};
int dir[] = {1,2};
halos[off++] = ops_decl_halo(u[i+ngrid_x*(j-1)], u[i+ngrid_x*j], halo_iter, base_from, base_to, dir, dir);
base_from[1] = 0; base_to[1] = sizes[2*(i+ngrid_x*j)+1];
halos[off++] = ops_decl_halo(u[i+ngrid_x*j], u[i+ngrid_x*(j-1)], halo_iter, base_from, base_to, dir, dir);
}
}
}
if (off != 2*(ngrid_x*(ngrid_y-1)+(ngrid_x-1)*ngrid_y)) printf("Something is not right\n");
ops_halo_group u_halos = ops_decl_halo_group(off,halos);
ops_partition("");
ops_checkpointing_init("check.h5", 5.0);
/**-------------------------- Computations --------------------------**/
double ct0, ct1, et0, et1;
ops_timers_core(&ct0, &et0);
//populate forcing, reference solution and boundary conditions
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
int iter_range[] = {-1,sizes[2*(i+ngrid_x*j)]+1,-1,sizes[2*(i+ngrid_x*j)+1]+1};
ops_par_loop(poisson_kernel_populate, "poisson_kernel_populate", blocks[i+ngrid_x*j], 2, iter_range,
ops_arg_gbl(&disps[2*(i+ngrid_x*j)], 1, "int", OPS_READ),
ops_arg_gbl(&disps[2*(i+ngrid_x*j)+1], 1, "int", OPS_READ),
ops_arg_idx(),
ops_arg_dat(u[i+ngrid_x*j], S2D_00, "double", OPS_WRITE),
ops_arg_dat(f[i+ngrid_x*j], S2D_00, "double", OPS_WRITE),
ops_arg_dat(ref[i+ngrid_x*j], S2D_00, "double", OPS_WRITE));
}
}
//initial guess 0
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
int iter_range[] = {0,sizes[2*(i+ngrid_x*j)],0,sizes[2*(i+ngrid_x*j)+1]};
ops_par_loop(poisson_kernel_initialguess, "poisson_kernel_initialguess", blocks[i+ngrid_x*j], 2, iter_range,
ops_arg_dat(u[i+ngrid_x*j], S2D_00, "double", OPS_WRITE));
}
}
for (int iter = 0; iter < n_iter; iter++) {
ops_halo_transfer(u_halos);
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
int iter_range[] = {0,sizes[2*(i+ngrid_x*j)],0,sizes[2*(i+ngrid_x*j)+1]};
ops_par_loop(poisson_kernel_stencil, "poisson_kernel_stencil", blocks[i+ngrid_x*j], 2, iter_range,
ops_arg_dat(u[i+ngrid_x*j], S2D_00_P10_M10_0P1_0M1, "double", OPS_READ),
ops_arg_dat(f[i+ngrid_x*j], S2D_00, "double", OPS_READ),
ops_arg_dat(u2[i+ngrid_x*j], S2D_00, "double", OPS_WRITE));
}
}
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
int iter_range[] = {0,sizes[2*(i+ngrid_x*j)],0,sizes[2*(i+ngrid_x*j)+1]};
ops_par_loop(poisson_kernel_update, "poisson_kernel_update", blocks[i+ngrid_x*j], 2, iter_range,
ops_arg_dat(u2[i+ngrid_x*j], S2D_00, "double", OPS_READ),
ops_arg_dat(u[i+ngrid_x*j] , S2D_00, "double", OPS_WRITE));
}
}
}
double err = 0.0;
for (int j = 0; j < ngrid_y; j++) {
for (int i = 0; i < ngrid_x; i++) {
int iter_range[] = {0,sizes[2*(i+ngrid_x*j)],0,sizes[2*(i+ngrid_x*j)+1]};
ops_par_loop(poisson_kernel_error, "poisson_kernel_error", blocks[i+ngrid_x*j], 2, iter_range,
ops_arg_dat(u[i+ngrid_x*j], S2D_00, "double", OPS_READ),
ops_arg_dat(ref[i+ngrid_x*j] , S2D_00, "double", OPS_READ),
ops_arg_reduce(red_err, 1, "double", OPS_INC));
}
}
ops_reduction_result(red_err,&err);
ops_printf("Total error: %g\n",err);
ops_timers_core(&ct1, &et1);
ops_timing_output();
ops_printf("\nTotal Wall time %lf\n",et1-et0);
ops_exit();
}
