std::pair<MPI_Request, const K*>* buildTwo(Prcndtnr* B, const MPI_Comm& comm) {
static_assert(std::is_same<typename Prcndtnr::super&, decltype(*this)>::value || std::is_same<typename Prcndtnr::super::super&, decltype(*this)>::value, "Wrong preconditioner");
std::pair<MPI_Request, const K*>* ret = nullptr;
constexpr unsigned short N = std::is_same<typename Prcndtnr::super&, decltype(*this)>::value ? 2 : 3;
unsigned short allUniform[N + 1];
allUniform[0] = Subdomain<K>::_map.size();
const Option& opt = *Option::get();
unsigned short nu = allUniform[1] = (_co ? _co->getLocal() : static_cast<unsigned short>(opt["geneo_nu"]));
allUniform[2] = static_cast<unsigned short>(~nu);
if(N == 3)
allUniform[3] = nu > 0 ? nu : std::numeric_limits<unsigned short>::max();
{
MPI_Op op;
#ifdef __MINGW32__
MPI_Op_create(&f<N>, 1, &op);
#else
auto f = [](void* in, void* inout, int*, MPI_Datatype*) -> void {
HPDDM_LAMBDA_F(in, input, inout, output, N)
};
MPI_Op_create(f, 1, &op);
#endif
MPI_Allreduce(MPI_IN_PLACE, allUniform, N + 1, MPI_UNSIGNED_SHORT, op, comm);
MPI_Op_free(&op);
}
if(nu > 0 || allUniform[1] != 0 || allUniform[2] != std::numeric_limits<unsigned short>::max()) {
if(!_co) {
_co = new CoarseOperator;
_co->setLocal(nu);
}
double construction = MPI_Wtime();
if(allUniform[1] == nu && allUniform[2] == static_cast<unsigned short>(~nu))
ret = _co->template construction<1, excluded>(Operator(*B, allUniform[0]), comm);
else if(N == 3 && allUniform[1] == 0 && allUniform[2] == static_cast<unsigned short>(~allUniform[3]))
ret = _co->template construction<2, excluded>(Operator(*B, allUniform[0]), comm);
else
ret = _co->template construction<0, excluded>(Operator(*B, allUniform[0]), comm);
construction = MPI_Wtime() - construction;
if(_co->getRank() == 0 && opt.val<int>("verbosity") > 0) {
std::stringstream ss;
ss << std::setprecision(2) << construction;
std::string line = " --- coarse operator transferred and factorized by " + to_string(static_cast<int>(opt["master_p"])) + " process" + (static_cast<int>(opt["master_p"]) == 1 ? "" : "es") + " (in " + ss.str() + "s)";
std::cout << line << std::endl;
std::cout << std::right << std::setw(line.size()) << "(criterion = " + to_string(allUniform[1] == nu && allUniform[2] == static_cast<unsigned short>(~nu) ? nu : (N == 3 && allUniform[2] == static_cast<unsigned short>(~allUniform[3]) ? -_co->getLocal() : 0)) + " -- topology = " + to_string(static_cast<int>(opt["master_topology"])) + " -- distribution = " + to_string(static_cast<int>(opt["master_distribution"])) + ")" << std::endl;
std::cout.unsetf(std::ios_base::adjustfield);
}
}
else {
delete _co;
_co = nullptr;
}
return ret;
}
inline std::pair<MPI_Request, const K*>* buildTwo(Operator&& A, const MPI_Comm& comm, Container& parm) {
static_assert(N == 2 || N == 3, "Wrong template parameter");
std::pair<MPI_Request, const K*>* ret = nullptr;
unsigned short allUniform[N + 1];
allUniform[0] = Subdomain<K>::_map.size();
allUniform[1] = parm[NU];
allUniform[2] = static_cast<unsigned short>(~parm[NU]);
if(N == 3)
allUniform[3] = parm[NU] > 0 ? parm[NU] : std::numeric_limits<unsigned short>::max();
{
MPI_Op op;
#ifndef __MINGW32__
auto f = [](void* in, void* inout, int*, MPI_Datatype*) -> void {
HPDDM_LAMBDA_F(in, input, inout, output, N)
};
MPI_Op_create(f, 1, &op);
#else
MPI_Op_create(&f<N>, 1, &op);
#endif
MPI_Allreduce(MPI_IN_PLACE, allUniform, N + 1, MPI_UNSIGNED_SHORT, op, comm);
MPI_Op_free(&op);
}
A.sparsity(allUniform[0]);
if(parm[NU] > 0 || allUniform[1] != 0 || allUniform[2] != std::numeric_limits<unsigned short>::max()) {
if(!_co)
_co = new CoarseOperator;
_co->setLocal(parm[NU]);
double construction = MPI_Wtime();
if(allUniform[1] == parm[NU] && allUniform[2] == static_cast<unsigned short>(~parm[NU]))
ret = _co->template construction<1, excluded>(A, comm, parm);
else if(N == 3 && allUniform[1] == 0 && allUniform[2] == static_cast<unsigned short>(~allUniform[3]))
ret = _co->template construction<2, excluded>(A, comm, parm);
else
ret = _co->template construction<0, excluded>(A, comm, parm);
construction = MPI_Wtime() - construction;
if(_co->getRank() == 0) {
std::cout << " (" << parm[P] << " process" << (parm[P] > 1 ? "es" : "") << " -- topology = " << parm[TOPOLOGY] << " -- distribution = " << _co->getDistribution() << ")" << std::endl;
std::cout << std::scientific << " --- coarse operator transferred and factorized (in " << construction << ")" << std::endl;
std::cout << " (criterion: " << (allUniform[1] == parm[NU] && allUniform[2] == static_cast<unsigned short>(~parm[NU]) ? parm[NU] : (N == 3 && allUniform[2] == static_cast<unsigned short>(~allUniform[3]) ? -_co->getLocal() : 0)) << ")" << std::endl;
}
_uc = new K[_co->getSizeRHS()];
}
return ret;
}
namespace HPDDM {
/* Class: Preconditioner
*
* A base class from which <Schwarz> and <Schur> inherit.
*
* Template Parameters:
* Solver - Solver used for the factorization of local matrices.
* CoarseOperator - Class of the coarse operator.
* K - Scalar type. */
template<template<class> class Solver, class CoarseOperator, class K>
class Preconditioner : public Subdomain<K> {
#ifdef __MINGW32__
private:
template<unsigned short N>
static void __stdcall f(void* in, void* inout, int*, MPI_Datatype*) {
HPDDM_LAMBDA_F(in, input, inout, output, N)
}
#endif
protected:
/* Variable: s
* Solver used in <Schwarz::callNumfact> and <Schur::callNumfactPreconditioner> or <Schur::computeSchurComplement>. */
Solver<K> _s;
/* Variable: co
* Pointer to a <Coarse operator>. */
CoarseOperator* _co;
/* Variable: ev
* Array of deflation vectors as needed by <Preconditioner::co>. */
K** _ev;
/* Variable: uc
* Workspace array of size <Coarse operator::local>. */
mutable K* _uc;
