int main(int argc, const char **argv) {
c0 = 0.500000000000000;
rc0 = 1.0 / 280.0;
rc1 = 4.0 / 105.0;
rc2 = 1.0 / 5.0;
rc3 = 4.0 / 5.0;
nx0 = 1000;
deltai0 = 0.00100000000000000;
deltat = 0.000400000000000000;
rkold[0] = 1.0 / 4.0;
rkold[1] = 3.0 / 20.0;
rkold[2] = 3.0 / 5.0;
rknew[0] = 2.0 / 3.0;
rknew[1] = 5.0 / 12.0;
rknew[2] = 3.0 / 5.0;
ops_init(argc, argv, 1);
ops_init_backend();
ops_decl_const2("c0", 1, "double", &c0);
ops_decl_const2("rc0", 1, "double", &rc0);
ops_decl_const2("rc1", 1, "double", &rc1);
ops_decl_const2("rc2", 1, "double", &rc2);
ops_decl_const2("rc3", 1, "double", &rc3);
ops_decl_const2("nx0", 1, "int", &nx0);
ops_decl_const2("deltai0", 1, "double", &deltai0);
ops_decl_const2("deltat", 1, "double", &deltat);
ops_block complex_numbers_block;
complex_numbers_block = ops_decl_block(1, "complex_numbers_block");
ops_dat phi;
ops_dat phi_old;
ops_dat wk0;
ops_dat wk1;
int halo_p[] = {4};
int halo_m[] = {-4};
int size[] = {nx0};
int base[] = {0};
double *val = NULL;
phi = ops_decl_dat(complex_numbers_block, 1, size, base, halo_m, halo_p, val,
"double", "phi");
phi_old = ops_decl_dat(complex_numbers_block, 1, size, base, halo_m, halo_p,
val, "double", "phi_old");
wk0 = ops_decl_dat(complex_numbers_block, 1, size, base, halo_m, halo_p, val,
"double", "wk0");
wk1 = ops_decl_dat(complex_numbers_block, 1, size, base, halo_m, halo_p, val,
"double", "wk1");
int stencil1_temp[] = {0};
ops_stencil stencil1 = ops_decl_stencil(1, 1, stencil1_temp, "0");
int stencil0_temp[] = {-4, -3, -2, -1, 1, 2, 3, 4};
ops_stencil stencil0 =
ops_decl_stencil(1, 8, stencil0_temp, "-4,-3,-2,-1,1,2,3,4");
ops_reduction real =
ops_decl_reduction_handle(sizeof(double), "double", "reduction_real");
ops_reduction imaginary = ops_decl_reduction_handle(sizeof(double), "double",
"reduction_imaginary");
ops_halo_group halo_exchange0;
{
int halo_iter[] = {4};
int from_base[] = {0};
int to_base[] = {nx0};
int dir[] = {1};
ops_halo halo0 =
ops_decl_halo(phi, phi, halo_iter, from_base, to_base, dir, dir);
ops_halo grp[] = {halo0};
halo_exchange0 = ops_decl_halo_group(1, grp);
}
ops_halo_group halo_exchange1;
{
int halo_iter[] = {4};
int from_base[] = {nx0 - 4};
int to_base[] = {-4};
int dir[] = {1};
ops_halo halo0 =
ops_decl_halo(phi, phi, halo_iter, from_base, to_base, dir, dir);
ops_halo grp[] = {halo0};
halo_exchange1 = ops_decl_halo_group(1, grp);
}
ops_partition("");
int iter_range5[] = {-4, nx0 + 4};
ops_par_loop_complex_numbers_block0_5_kernel(
"Initialisation", complex_numbers_block, 1, iter_range5,
ops_arg_dat(phi, 1, stencil1, "double", OPS_WRITE), ops_arg_idx());
ops_halo_transfer(halo_exchange0);
ops_halo_transfer(halo_exchange1);
double cpu_start, elapsed_start;
ops_timers(&cpu_start, &elapsed_start);
for (int iteration = 0; iteration < 1; iteration++) {
int iter_range4[] = {-4, nx0 + 4};
ops_par_loop_complex_numbers_block0_4_kernel(
"Save equations", complex_numbers_block, 1, iter_range4,
ops_arg_dat(phi, 1, stencil1, "double", OPS_READ),
ops_arg_dat(phi_old, 1, stencil1, "double", OPS_WRITE));
for (int stage = 0; stage < 3; stage++) {
int iter_range0[] = {0, nx0};
ops_par_loop_complex_numbers_block0_0_kernel(
"D(phi[x0 t] x0)", complex_numbers_block, 1, iter_range0,
ops_arg_dat(phi, 1, stencil0, "double", OPS_READ),
ops_arg_dat(wk0, 1, stencil1, "double", OPS_WRITE));
int iter_range1[] = {0, nx0};
ops_par_loop_complex_numbers_block0_1_kernel(
"Residual of equation", complex_numbers_block, 1, iter_range1,
ops_arg_dat(wk0, 1, stencil1, "double", OPS_READ),
ops_arg_dat(wk1, 1, stencil1, "double", OPS_WRITE));
int iter_range2[] = {-4, nx0 + 4};
ops_par_loop_complex_numbers_block0_2_kernel(
"RK new (subloop) update", complex_numbers_block, 1, iter_range2,
ops_arg_dat(phi_old, 1, stencil1, "double", OPS_READ),
ops_arg_dat(wk1, 1, stencil1, "double", OPS_READ),
ops_arg_dat(phi, 1, stencil1, "double", OPS_WRITE),
ops_arg_gbl(&rknew[stage], 1, "double", OPS_READ));
int iter_range3[] = {-4, nx0 + 4};
ops_par_loop_complex_numbers_block0_3_kernel(
"RK old update", complex_numbers_block, 1, iter_range3,
ops_arg_dat(wk1, 1, stencil1, "double", OPS_READ),
ops_arg_dat(phi_old, 1, stencil1, "double", OPS_RW),
ops_arg_gbl(&rkold[stage], 1, "double", OPS_READ));
ops_halo_transfer(halo_exchange0);
ops_halo_transfer(halo_exchange1);
}
int iter_range0[] = {0, nx0};
ops_par_loop_complex_numbers_block0_cn_kernel(
"Complex numbers", complex_numbers_block, 1, iter_range0,
ops_arg_dat(phi, 1, stencil0, "double", OPS_READ),
ops_arg_reduce(real, 1, "double", OPS_INC),
ops_arg_reduce(imaginary, 1, "double", OPS_INC));
}
double cpu_end, elapsed_end;
ops_timers(&cpu_end, &elapsed_end);
ops_printf("\nTimings are:\n");
ops_printf("-----------------------------------------\n");
ops_printf("Total Wall time %lf\n", elapsed_end - elapsed_start);
ops_fetch_block_hdf5_file(complex_numbers_block, "complex_numbers_2500.h5");
ops_fetch_dat_hdf5_file(phi, "complex_numbers_2500.h5");
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();
}