From e369d7306d8bc53fb1e2456152d444b7e61fda07 Mon Sep 17 00:00:00 2001
From: paboyle <paboyle@ph.ed.ac.uk>
Date: Fri, 27 Apr 2018 07:51:44 +0100
Subject: [PATCH] Rename

---
 tests/lanczos/Test_compressed_lanczos.cc | 253 +++++++++++++++++++++++
 1 file changed, 253 insertions(+)
 create mode 100644 tests/lanczos/Test_compressed_lanczos.cc

diff --git a/tests/lanczos/Test_compressed_lanczos.cc b/tests/lanczos/Test_compressed_lanczos.cc
new file mode 100644
index 00000000..8bce82bb
--- /dev/null
+++ b/tests/lanczos/Test_compressed_lanczos.cc
@@ -0,0 +1,253 @@
+    /*************************************************************************************
+
+    Grid physics library, www.github.com/paboyle/Grid 
+
+    Source file: ./tests/Test_dwf_compressed_lanczos_reorg.cc
+
+    Copyright (C) 2017
+
+Author: Leans heavily on Christoph Lehner's code
+Author: Peter Boyle <paboyle@ph.ed.ac.uk>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+    See the full license in the file "LICENSE" in the top level distribution directory
+    *************************************************************************************/
+    /*  END LEGAL */
+/*
+ *  Reimplement the badly named "multigrid" lanczos as compressed Lanczos using the features 
+ *  in Grid that were intended to be used to support blocked Aggregates, from
+ */
+#include <Grid/Grid.h>
+#include <Grid/algorithms/iterative/ImplicitlyRestartedLanczos.h>
+#include <Grid/algorithms/iterative/LocalCoherenceLanczos.h>
+
+using namespace std;
+using namespace Grid;
+using namespace Grid::QCD;
+
+template<class Fobj,class CComplex,int nbasis>
+class LocalCoherenceLanczosScidac : public LocalCoherenceLanczos<Fobj,CComplex,nbasis>
+{ 
+public:
+  typedef iVector<CComplex,nbasis >           CoarseSiteVector;
+  typedef Lattice<CoarseSiteVector>           CoarseField;
+  typedef Lattice<CComplex>   CoarseScalar; // used for inner products on fine field
+  typedef Lattice<Fobj>          FineField;
+
+  LocalCoherenceLanczosScidac(GridBase *FineGrid,GridBase *CoarseGrid,
+			      LinearOperatorBase<FineField> &FineOp,
+			      int checkerboard) 
+    // Base constructor
+    : LocalCoherenceLanczos<Fobj,CComplex,nbasis>(FineGrid,CoarseGrid,FineOp,checkerboard) 
+  {};
+
+  void checkpointFine(std::string evecs_file,std::string evals_file)
+  {
+    assert(this->subspace.size()==nbasis);
+    emptyUserRecord record;
+    Grid::QCD::ScidacWriter WR(this->_FineGrid->IsBoss());
+    WR.open(evecs_file);
+    for(int k=0;k<nbasis;k++) {
+      WR.writeScidacFieldRecord(this->subspace[k],record);
+    }
+    WR.close();
+    
+    XmlWriter WRx(evals_file);
+    write(WRx,"evals",this->evals_fine);
+  }
+
+  void checkpointFineRestore(std::string evecs_file,std::string evals_file)
+  {
+    this->evals_fine.resize(nbasis);
+    this->subspace.resize(nbasis,this->_FineGrid);
+    
+    std::cout << GridLogIRL<< "checkpointFineRestore:  Reading evals from "<<evals_file<<std::endl;
+    XmlReader RDx(evals_file);
+    read(RDx,"evals",this->evals_fine);
+    
+    assert(this->evals_fine.size()==nbasis);
+    
+    std::cout << GridLogIRL<< "checkpointFineRestore:  Reading evecs from "<<evecs_file<<std::endl;
+    emptyUserRecord record;
+    Grid::QCD::ScidacReader RD ;
+    RD.open(evecs_file);
+    for(int k=0;k<nbasis;k++) {
+      this->subspace[k].checkerboard=this->_checkerboard;
+      RD.readScidacFieldRecord(this->subspace[k],record);
+      
+    }
+    RD.close();
+  }
+
+  void checkpointCoarse(std::string evecs_file,std::string evals_file)
+  {
+    int n = this->evec_coarse.size();
+    emptyUserRecord record;
+    Grid::QCD::ScidacWriter WR(this->_CoarseGrid->IsBoss());
+    WR.open(evecs_file);
+    for(int k=0;k<n;k++) {
+      WR.writeScidacFieldRecord(this->evec_coarse[k],record);
+    }
+    WR.close();
+    
+    XmlWriter WRx(evals_file);
+    write(WRx,"evals",this->evals_coarse);
+  }
+
+  void checkpointCoarseRestore(std::string evecs_file,std::string evals_file,int nvec)
+  {
+    std::cout << "resizing coarse vecs to " << nvec<< std::endl;
+    this->evals_coarse.resize(nvec);
+    this->evec_coarse.resize(nvec,this->_CoarseGrid);
+    std::cout << GridLogIRL<< "checkpointCoarseRestore:  Reading evals from "<<evals_file<<std::endl;
+    XmlReader RDx(evals_file);
+    read(RDx,"evals",this->evals_coarse);
+
+    assert(this->evals_coarse.size()==nvec);
+    emptyUserRecord record;
+    std::cout << GridLogIRL<< "checkpointCoarseRestore:  Reading evecs from "<<evecs_file<<std::endl;
+    Grid::QCD::ScidacReader RD ;
+    RD.open(evecs_file);
+    for(int k=0;k<nvec;k++) {
+      RD.readScidacFieldRecord(this->evec_coarse[k],record);
+    }
+    RD.close();
+  }
+};
+
+int main (int argc, char ** argv) {
+
+  Grid_init(&argc,&argv);
+  GridLogIRL.TimingMode(1);
+
+  LocalCoherenceLanczosParams Params;
+  {
+    Params.omega.resize(10);
+    Params.blockSize.resize(5);
+    XmlWriter writer("Params_template.xml");
+    write(writer,"Params",Params);
+    std::cout << GridLogMessage << " Written Params_template.xml" <<std::endl;
+  }
+  
+  { 
+    XmlReader reader(std::string("./Params.xml"));
+    read(reader, "Params", Params);
+  }
+
+  int     Ls = (int)Params.omega.size();
+  RealD mass = Params.mass;
+  RealD M5   = Params.M5;
+  std::vector<int> blockSize = Params.blockSize;
+
+  // Grids
+  GridCartesian         * UGrid     = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(),
+								     GridDefaultSimd(Nd,vComplex::Nsimd()),
+								     GridDefaultMpi());
+  GridRedBlackCartesian * UrbGrid   = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
+  GridCartesian         * FGrid     = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
+  GridRedBlackCartesian * FrbGrid   = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
+
+  std::vector<int> fineLatt     = GridDefaultLatt();
+  int dims=fineLatt.size();
+  assert(blockSize.size()==dims+1);
+  std::vector<int> coarseLatt(dims);
+  std::vector<int> coarseLatt5d ;
+
+  for (int d=0;d<coarseLatt.size();d++){
+    coarseLatt[d] = fineLatt[d]/blockSize[d];    assert(coarseLatt[d]*blockSize[d]==fineLatt[d]);
+  }
+
+  std::cout << GridLogMessage<< " 5d coarse lattice is ";
+  for (int i=0;i<coarseLatt.size();i++){
+    std::cout << coarseLatt[i]<<"x";
+  } 
+  int cLs = Ls/blockSize[dims]; assert(cLs*blockSize[dims]==Ls);
+  std::cout << cLs<<std::endl;
+  
+  GridCartesian         * CoarseGrid4    = SpaceTimeGrid::makeFourDimGrid(coarseLatt, GridDefaultSimd(Nd,vComplex::Nsimd()),GridDefaultMpi());
+  GridRedBlackCartesian * CoarseGrid4rb  = SpaceTimeGrid::makeFourDimRedBlackGrid(CoarseGrid4);
+  GridCartesian         * CoarseGrid5    = SpaceTimeGrid::makeFiveDimGrid(cLs,CoarseGrid4);
+
+  // Gauge field
+  LatticeGaugeField Umu(UGrid);
+  FieldMetaData header;
+  NerscIO::readConfiguration(Umu,header,Params.config);
+  std::cout << GridLogMessage << "Lattice dimensions: " << GridDefaultLatt() << "   Ls: " << Ls << std::endl;
+
+  // ZMobius EO Operator
+  ZMobiusFermionR Ddwf(Umu, *FGrid, *FrbGrid, *UGrid, *UrbGrid, mass, M5, Params.omega,1.,0.);
+  SchurDiagTwoOperator<ZMobiusFermionR,LatticeFermion> HermOp(Ddwf);
+
+  // Eigenvector storage
+  LanczosParams fine  =Params.FineParams;  
+  LanczosParams coarse=Params.CoarseParams;  
+
+  const int Ns1 = fine.Nstop;   const int Ns2 = coarse.Nstop;
+  const int Nk1 = fine.Nk;      const int Nk2 = coarse.Nk;
+  const int Nm1 = fine.Nm;      const int Nm2 = coarse.Nm;
+
+  std::cout << GridLogMessage << "Keep " << fine.Nstop   << " fine   vectors" << std::endl;
+  std::cout << GridLogMessage << "Keep " << coarse.Nstop << " coarse vectors" << std::endl;
+  assert(Nm2 >= Nm1);
+
+  const int nbasis= 60;
+  assert(nbasis==Ns1);
+  LocalCoherenceLanczosScidac<vSpinColourVector,vTComplex,nbasis> _LocalCoherenceLanczos(FrbGrid,CoarseGrid5,HermOp,Odd);
+  std::cout << GridLogMessage << "Constructed LocalCoherenceLanczos" << std::endl;
+
+  assert( (Params.doFine)||(Params.doFineRead));
+
+  if ( Params.doFine ) { 
+    std::cout << GridLogMessage << "Performing fine grid IRL Nstop "<< Ns1 << " Nk "<<Nk1<<" Nm "<<Nm1<< std::endl;
+    _LocalCoherenceLanczos.calcFine(fine.Cheby,
+		 fine.Nstop,fine.Nk,fine.Nm,
+		 fine.resid,fine.MaxIt, 
+		 fine.betastp,fine.MinRes);
+
+    std::cout << GridLogIRL<<"Checkpointing Fine evecs"<<std::endl;
+    _LocalCoherenceLanczos.checkpointFine(std::string("evecs.scidac"),std::string("evals.xml"));
+    _LocalCoherenceLanczos.testFine(fine.resid*100.0); // Coarse check
+    std::cout << GridLogIRL<<"Orthogonalising"<<std::endl;
+    _LocalCoherenceLanczos.Orthogonalise();
+    std::cout << GridLogIRL<<"Orthogonaled"<<std::endl;
+  }
+
+  if ( Params.doFineRead ) { 
+    _LocalCoherenceLanczos.checkpointFineRestore(std::string("evecs.scidac"),std::string("evals.xml"));
+    _LocalCoherenceLanczos.testFine(fine.resid*100.0); // Coarse check
+    _LocalCoherenceLanczos.Orthogonalise();
+  }
+
+  if ( Params.doCoarse ) {
+    std::cout << GridLogMessage << "Performing coarse grid IRL Nstop "<< Ns2<< " Nk "<<Nk2<<" Nm "<<Nm2<< std::endl;
+    _LocalCoherenceLanczos.calcCoarse(coarse.Cheby,Params.Smoother,Params.coarse_relax_tol,
+			      coarse.Nstop, coarse.Nk,coarse.Nm,
+			      coarse.resid, coarse.MaxIt, 
+			      coarse.betastp,coarse.MinRes);
+
+
+    std::cout << GridLogIRL<<"Checkpointing coarse evecs"<<std::endl;
+    _LocalCoherenceLanczos.checkpointCoarse(std::string("evecs.coarse.scidac"),std::string("evals.coarse.xml"));
+  }
+
+  if ( Params.doCoarseRead ) {
+    // Verify we can reread ???
+    _LocalCoherenceLanczos.checkpointCoarseRestore(std::string("evecs.coarse.scidac"),std::string("evals.coarse.xml"),coarse.Nstop);
+    _LocalCoherenceLanczos.testCoarse(coarse.resid*100.0,Params.Smoother,Params.coarse_relax_tol); // Coarse check
+  }
+  Grid_finalize();
+}
+