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#include <cctk.h>
#include <cassert>
#include <cstring>
#include <iostream>
#include <map>
#include <string>
#include <vector>
#ifdef CCTK_MPI
# include <mpi.h>
#else
# include "nompi.h"
#endif
#include <functions.hh>
#include <mpi_string.hh>
namespace Carpet
{
using namespace std;
using namespace CarpetLib;
vector <string> model_names; // Model id to model name
std::map <string, int> model_map; // Model name to model id
vector <int> model_ids; // Process to model id
vector <vector <int> > model_procs; // Model id to processes
vector <string> const & ModelNames () { return model_names; }
std::map <string, int> const & ModelMap () { return model_map; }
vector <int> const & ModelIds () { return model_ids; }
vector <vector <int> > const & ModelProcs () { return model_procs; }
string ModelName (int const id)
{
return model_names.AT(id);
}
int ModelId (string const name)
{
if (model_map.find (name) != model_map.end())
{
return model_map[name];
}
else
{
return -1;
}
}
int ModelId (int const proc)
{
return model_ids.AT(proc);
}
vector <int> const & ModelProcs (int const id)
{
return model_procs.AT(id);
}
void
SplitUniverse (MPI_Comm const world, string const model, MPI_Comm & comm,
bool const verbose)
{
// Get the total number of processes
int num_procs;
MPI_Comm_size (world, & num_procs);
int my_proc;
MPI_Comm_rank (world, & my_proc);
// Gather all model names
vector <string> const models (allgather_string (world, model));
// Map model strings to small integers
int num_models = 0;
model_ids.resize (num_procs);
model_map.clear ();
for (int n = 0; n < num_procs; ++ n)
{
if (model_map.find (models.AT(n)) != model_map.end())
{
model_ids.AT(n) = model_map[models.AT(n)];
}
else
{
model_map[models.AT(n)] = num_models;
model_ids.AT(n) = num_models;
++ num_models;
}
}
// Determine processes per model
vector <int> num_model_procs (num_models, 0);
for (int n = 0; n < num_procs; ++ n)
{
++ num_model_procs.AT(model_ids.AT(n));
}
model_names.resize (num_models);
model_procs.resize (num_models);
for (int m = 0; m < num_models; ++ m)
{
model_procs.AT(m).reserve (num_model_procs.AT(m));
}
for (int n = 0; n < num_procs; ++ n)
{
model_names.AT(model_ids.AT(n)) = models.AT(n);
model_procs.AT(model_ids.AT(n)).push_back (n);
}
for (int m = 0; m < num_models; ++ m)
{
assert (static_cast<int> (model_procs.AT(m).size())
== num_model_procs.AT(m));
}
// Create a new communicator for each model
MPI_Comm_split (world, model_ids.AT(my_proc), my_proc, & comm);
if (verbose)
{
CCTK_INFO ("Multi-Model listing:");
for (int m = 0; m < num_models; ++ m)
{
cout << " model " << m << ": \"" << model_names.AT(m) << "\"" << endl;
}
CCTK_INFO ("Multi-Model process distribution:");
for (int n = 0; n < num_procs; ++ n)
{
int const m = model_ids.AT(n);
bool const same_model_as_prev =
n-1 >= 0 and model_ids.AT(n-1) == m;
bool const same_model_as_next =
n+1 < num_procs and model_ids.AT(n+1) == m;
if (same_model_as_next) {
if (same_model_as_prev) {
// Output nothing
} else {
// This process has the same model as the next one:
// output only a partial line
cout << " processes " << n << "-";
}
} else {
if (same_model_as_prev) {
// This process has the same model as the previous one:
// finish a partial line
cout << n << ": "
<< "model " << m << " \"" << model_names.AT(m) << "\"" << endl;
} else {
cout << " process " << n << ": "
<< "model " << m << " \"" << model_names.AT(m) << "\"" << endl;
}
}
}
int const my_model = model_ids.AT(my_proc);
CCTK_VInfo (CCTK_THORNSTRING,
"Multi-Model: This is process %d, model %d \"%s\"",
my_proc, my_model, model.c_str());
}
}
} // namespace Carpet
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