mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-28 14:50:33 +05:00
95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
#include <mpi.h>
|
|
|
|
#include <iostream>
|
|
#include <stdexcept>
|
|
|
|
#include "ng_mpi.hpp"
|
|
#include "utils.hpp"
|
|
|
|
using std::cout;
|
|
using std::endl;
|
|
|
|
namespace ngcore {
|
|
|
|
static std::unique_ptr<SharedLibrary> mpi_lib, ng_mpi_lib;
|
|
|
|
void InitMPI() {
|
|
if (ng_mpi_lib) return;
|
|
cout << "InitMPI" << endl;
|
|
|
|
typedef void (*get_version_handle)(char *, int *);
|
|
typedef int (*init_handle)(int *, char ***);
|
|
typedef int (*mpi_initialized_handle)(int *);
|
|
typedef void (*ng_init_handle)();
|
|
|
|
init_handle mpi_init;
|
|
mpi_initialized_handle mpi_initialized;
|
|
get_version_handle get_version;
|
|
try {
|
|
mpi_init = GetSymbol<init_handle>("MPI_Init");
|
|
cout << "MPI already loaded " << mpi_init << endl;
|
|
mpi_initialized = GetSymbol<mpi_initialized_handle>("MPI_Initialized");
|
|
get_version = GetSymbol<get_version_handle>("MPI_Get_library_version");
|
|
} catch (std::runtime_error &e) {
|
|
cout << "MPI not loaded" << endl;
|
|
mpi_lib = std::make_unique<SharedLibrary>("libmpi.so", std::nullopt, true);
|
|
mpi_init = mpi_lib->GetSymbol<init_handle>("MPI_Init");
|
|
mpi_initialized =
|
|
mpi_lib->GetSymbol<mpi_initialized_handle>("MPI_Initialized");
|
|
get_version =
|
|
mpi_lib->GetSymbol<get_version_handle>("MPI_Get_library_version");
|
|
}
|
|
|
|
int flag = 0;
|
|
mpi_initialized(&flag);
|
|
if (!flag) {
|
|
cout << "Calling MPI_Init" << endl;
|
|
mpi_init(nullptr, nullptr);
|
|
}
|
|
|
|
char version_string[65536];
|
|
int resultlen = 0;
|
|
get_version(version_string, &resultlen);
|
|
mpi_library_version = version_string;
|
|
cout << "MPI version: " << version_string << endl;
|
|
|
|
std::string libname = "";
|
|
if (mpi_library_version.substr(0, 8) == "Open MPI") {
|
|
cout << "Have Open MPI" << endl;
|
|
libname = "/opt/netgen/lib/libng_openmpi.so";
|
|
} else if (mpi_library_version.substr(0, 5) == "MPICH") {
|
|
cout << "Have MPICH" << endl;
|
|
libname = "/opt/netgen/lib/libng_mpich.so";
|
|
} else
|
|
cout << "Unknown MPI" << endl;
|
|
|
|
if (libname.size()) {
|
|
cout << "loading " << libname << endl;
|
|
cout << "NG_MPI_INT before " << NG_MPI_INT.value << endl;
|
|
ng_mpi_lib = std::make_unique<SharedLibrary>(libname);
|
|
auto ng_init = ng_mpi_lib->GetSymbol<ng_init_handle>("ng_init_mpi");
|
|
cout << "have ng_init " << ng_init << endl;
|
|
ng_init();
|
|
cout << "NG_MPI_INT after " << NG_MPI_INT.value << endl;
|
|
}
|
|
}
|
|
|
|
// NG_MPI_Comm NG_MPI_COMM_WORLD = 0;
|
|
|
|
// NG_MPI_Datatype NG_MPI_INT = 0;
|
|
// NG_MPI_Datatype NG_MPI_SHORT = 0;
|
|
// NG_MPI_Datatype NG_MPI_CHAR = 0;
|
|
// NG_MPI_Datatype NG_MPI_UINT64_T = 0;
|
|
// NG_MPI_Datatype NG_MPI_DOUBLE = 0;
|
|
// NG_MPI_Datatype NG_MPI_C_BOOL = 0;
|
|
|
|
static std::runtime_error no_mpi() {
|
|
return std::runtime_error("MPI not enabled");
|
|
}
|
|
|
|
std::string mpi_library_version = "";
|
|
|
|
#include "ng_mpi_generated_dummy_init.hpp"
|
|
|
|
} // namespace ngcore
|