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Further tuning and lanczos

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This commit is contained in:
Peter Boyle 2023-09-27 16:21:58 -04:00
parent 0d63dce4e2
commit be18ffe3b4
1 changed files with 13 additions and 4 deletions
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17
tests/debug/Test_general_coarse_hdcg.cc
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@ -177,17 +177,21 @@ int main (int argc, char ** argv)
LittleDiracOperator LittleDiracOp(geom,FrbGrid,Coarse5d);
LittleDiracOp.CoarsenOperatorColoured(FineHermOp,Aggregates);
// Try projecting to one hop only
LittleDiracOperator LittleDiracOpProj(LittleDiracOp);
LittleDiracOpProj.ProjectNearestNeighbour(0.5);
typedef HermitianLinearOperator<LittleDiracOperator,CoarseVector> HermMatrix;
HermMatrix CoarseOp (LittleDiracOp);
//////////////////////////////////////////
// Build a coarse lanczos
//////////////////////////////////////////
Chebyshev<CoarseVector> IRLCheby(0.02,50.0,71); // 1 iter
Chebyshev<CoarseVector> IRLCheby(0.5,60.0,71); // 1 iter
FunctionHermOp<CoarseVector> IRLOpCheby(IRLCheby,CoarseOp);
PlainHermOp<CoarseVector> IRLOp (CoarseOp);
int Nk=64;
int Nm=128;
int Nk=48;
int Nm=64;
int Nstop=Nk;
ImplicitlyRestartedLanczos<CoarseVector> IRL(IRLOpCheby,IRLOp,Nstop,Nk,Nm,1.0e-5,20);
@ -195,6 +199,9 @@ int main (int argc, char ** argv)
std::vector<RealD> eval(Nm);
std::vector<CoarseVector> evec(Nm,Coarse5d);
CoarseVector c_src(Coarse5d); c_src=1.0;
PowerMethod<CoarseVector> cPM; cPM(CoarseOp,c_src);
IRL.calc(eval,evec,c_src,Nconv);
DeflatedGuesser<CoarseVector> DeflCoarseGuesser(evec,eval);
@ -230,7 +237,9 @@ int main (int argc, char ** argv)
// use a limited stencil. Reread BFM code to check on evecs / deflation strategy with prec
//
std::vector<RealD> los({3.0}); // Nbasis 40 == 36,36 iters
std::vector<int> ords({7,8,10}); // Nbasis 40 == 40,38,36 iters (320,342,396 mults)
// std::vector<int> ords({7,8,10}); // Nbasis 40 == 40,38,36 iters (320,342,396 mults)
std::vector<int> ords({7}); // Nbasis 40 == 40 iters (320 mults)
// Standard CG
// result=Zero();