portelli/Grid
1
0
Fork 0
mirror of https://github.com/paboyle/Grid.git synced 2024-11-09 23:45:36 +00:00
Code Releases Activity

Keep MRHS in a different file

Browse Source
This commit is contained in:
Peter Boyle 2024-04-05 00:59:53 -04:00
parent 1196b1a161
commit 0f0e7512f3
1 changed files with 0 additions and 133 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

133
Grid/algorithms/iterative/AdefGeneric.h
View File

@ -538,139 +538,6 @@ class TwoLevelADEF2 : public TwoLevelCG<Field>
};
template<class Field, class CoarseField, class Aggregation>
class TwoLevelADEF2mrhs : public TwoLevelADEF2<Field,CoarseField,Aggregation>
{
public:
GridBase *coarsegridmrhs;
LinearFunction<CoarseField> &_CoarseSolverMrhs;
LinearFunction<CoarseField> &_CoarseSolverPreciseMrhs;
LinearFunction<CoarseField> &_CoarseGuesser;
TwoLevelADEF2mrhs(RealD tol,
Integer maxit,
LinearOperatorBase<Field> &FineLinop,
LinearFunction<Field> &Smoother,
// LinearFunction<CoarseField> &CoarseSolver,
// LinearFunction<CoarseField> &CoarseSolverPrecise,
LinearFunction<CoarseField> &CoarseSolverMrhs,
LinearFunction<CoarseField> &CoarseSolverPreciseMrhs,
LinearFunction<CoarseField> &CoarseGuesser,
GridBase *rhsgrid,
Aggregation &Aggregates) :
TwoLevelADEF2<Field,CoarseField,Aggregation>(tol, maxit,FineLinop,Smoother,CoarseSolverMrhs,CoarseSolverPreciseMrhs,Aggregates),
_CoarseSolverMrhs(CoarseSolverMrhs),
_CoarseSolverPreciseMrhs(CoarseSolverPreciseMrhs),
_CoarseGuesser(CoarseGuesser)
{
coarsegridmrhs = rhsgrid;
};
virtual void Vstart(std::vector<Field> & x,std::vector<Field> & src)
{
int nrhs=x.size();
std::cout << GridLogMessage<<"HDCG: fPcg Vstart for "<<nrhs<<" right hand sides" <<std::endl;
///////////////////////////////////
// Choose x_0 such that
// x_0 = guess + (A_ss^inv) r_s = guess + Ass_inv [src -Aguess]
// = [1 - Ass_inv A] Guess + Assinv src
// = P^T guess + Assinv src
// = Vstart [Tang notation]
// This gives:
// W^T (src - A x_0) = src_s - A guess_s - r_s
// = src_s - (A guess)_s - src_s + (A guess)_s
// = 0
///////////////////////////////////
CoarseField PleftProj(this->coarsegrid);
CoarseField PleftMss_proj(this->coarsegrid);
CoarseField PleftProjMrhs(this->coarsegridmrhs);
CoarseField PleftMss_projMrhs(this->coarsegridmrhs);
std::cout << GridLogMessage<<"HDCG: fPcg Vstart Mrhs projecting "<<std::endl;
for(int rhs=0;rhs<nrhs;rhs++) {
this->_Aggregates.ProjectToSubspace(PleftProj,src[rhs]); // can optimise later
InsertSliceFast(PleftProj,PleftProjMrhs,rhs,0);
this->_CoarseGuesser(PleftProj,PleftMss_proj);
InsertSliceFast(PleftMss_proj,PleftMss_projMrhs,rhs,0);
}
std::cout << GridLogMessage<<"HDCG: fPcg Vstart Mrhs coarse solve "<<std::endl;
this->_CoarseSolverPreciseMrhs(PleftProjMrhs,PleftMss_projMrhs); // Ass^{-1} r_s
std::cout << GridLogMessage<<"HDCG: fPcg Vstart promote "<<std::endl;
for(int rhs=0;rhs<nrhs;rhs++) {
ExtractSliceFast(PleftMss_proj,PleftMss_projMrhs,rhs,0);
this->_Aggregates.PromoteFromSubspace(PleftMss_proj,x[rhs]);
}
}
virtual void PcgM1(std::vector<Field> & in,std::vector<Field> & out){
int nrhs=in.size();
std::cout << " mrhs PcgM1 for "<<nrhs<<" right hand sides"<<std::endl;
MemoryManager::Print();
// [PTM+Q] in = [1 - Q A] M in + Q in = Min + Q [ in -A Min]
Field tmp(this->grid);
std::vector<Field> Min(nrhs,this->grid);
std::cout << " mrhs PcgM1 Min "<<std::endl;
CoarseField PleftProj(this->coarsegrid);
CoarseField PleftMss_proj(this->coarsegrid);
CoarseField PleftProjMrhs(this->coarsegridmrhs);
CoarseField PleftMss_projMrhs(this->coarsegridmrhs);
std::cout << " mrhs Coarse ops "<<std::endl;
// Really want the coarse solver
// to do the guessing itself, knowing the eigenvectors.
// The projection to coarse space is in aggregates
// If the Aggregates have a layout change option
// they could formulate as a BLAS routine.
// Put the routines in this object
for(int rhs=0;rhs<nrhs;rhs++) {
std::cout << GridLogMessage<<" Smoother for "<<rhs<<std::endl;
this->_Smoother(in[rhs],Min[rhs]);
std::cout << GridLogMessage<<" HermOp for "<<rhs<<std::endl;
this->_FineLinop.HermOp(Min[rhs],out[rhs]);
axpy(tmp,-1.0,out[rhs],in[rhs]); // tmp = in - A Min
// Was
// this->_Aggregates.ProjectToSubspace(PleftProj,tmp); // can optimise later
// Now:
std::cout << GridLogMessage<<" blockProject for "<<rhs<<std::endl;
blockProjectFast(PleftProj,tmp,this->_Aggregates.subspace);
std::cout << GridLogMessage<<" InsertSlice for "<<rhs<<std::endl;
InsertSlice(PleftProj,PleftProjMrhs,rhs,0);
std::cout << GridLogMessage<<" CoarseGuesser for "<<rhs<<std::endl;
this->_CoarseGuesser(PleftProj,PleftMss_proj);
std::cout << GridLogMessage<<" InsertSlice for "<<rhs<<std::endl;
InsertSlice(PleftMss_proj,PleftMss_projMrhs,rhs,0);
}
MemoryManager::Print();
std::cout << " Coarse solve "<<std::endl;
this->_CoarseSolverMrhs(PleftProjMrhs,PleftMss_projMrhs); // Ass^{-1} [in - A Min]_s
std::cout << " Coarse solve done"<<std::endl;
MemoryManager::Print();
for(int rhs=0;rhs<nrhs;rhs++) {
std::cout << GridLogMessage<<" Extract for "<<rhs<<std::endl;
ExtractSlice(PleftMss_proj,PleftMss_projMrhs,rhs,0);
std::cout << GridLogMessage<<" Promote for "<<rhs<<std::endl;
this->_Aggregates.PromoteFromSubspace(PleftMss_proj,tmp);// tmp = Q[in - A Min]
// std::cout << " add for "<<rhs<<std::endl;
axpy(out[rhs],1.0,Min[rhs],tmp); // Min+tmp
}
MemoryManager::Print();
std::cout << " Extracted "<<std::endl;
}
};
template<class Field>
class TwoLevelADEF1defl : public TwoLevelCG<Field>