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Adding (Harmonic) Block KS

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This commit is contained in:
Chulwoo Jung
2026-03-31 12:36:18 -04:00
parent 09aa843984
commit 167f94e86c
6 changed files with 1673 additions and 4 deletions
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examples/Example_krylov_schur.cc
+15 -4
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@@ -52,6 +52,8 @@ struct LanczosParameters: Serializable {
Integer, Np,
Integer, ReadEvec,
Integer, maxIter,
Integer, Nblock,
Integer, verify,
RealD, resid,
RealD, ChebyLow,
RealD, ChebyHigh,
@@ -333,18 +335,27 @@ int main (int argc, char ** argv)
// KrySchur(src, maxIter, Nm, Nk, Nstop);
// KrylovSchur KrySchur (HermOp2, UGrid, resid,EvalNormSmall);
// Hacked, really EvalImagSmall
#if 1
RealD shift=1.5;
#if 0
KrylovSchur KrySchur (Dwilson, UGrid, resid,EvalImNormSmall);
KrySchur(src[0], maxIter, Nm, Nk, Nstop,&shift);
#else
KrylovSchur KrySchur (Iwilson, UGrid, resid,EvalImNormSmall);
KrySchur(src[0], maxIter, Nm, Nk, Nstop);
int Nblock=4;
Nblock=LanParams.Nblock;
bool if_verify=false;
if(LanParams.verify) if_verify=true;
// KrylovSchur KrySchur (Dwilson, UGrid, resid,EvalImNormSmall);
// KrySchur(src, maxIter, Nm, Nk, Nstop,Nblock,true,true);
// BlockedKrylovSchur KrySchur (Dwilson, UGrid, resid,EvalImNormSmall);
// KrySchur(src, maxIter, Nm, Nk, Nstop,Nblock,true,if_verify);
HarmonicBlockedKrylovSchur KrySchur (Dwilson, UGrid, resid,shift,EvalImNormSmall);
KrySchur(src, maxIter, Nm, Nk, Nstop,Nblock,true);
#endif
std::cout << GridLogMessage << "evec.size= " << KrySchur.evecs.size()<< std::endl;
src[0]=KrySchur.evecs[0];
for (int i=1;i<Nstop;i++) src[0]+=KrySchur.evecs[i];
std::cout << GridLogMessage << "KrySchur.evecs= "<< KrySchur.evecs.size() <<std::endl;
for (int i=1;i<Nk;i++) src[0]+=KrySchur.evecs[i];
for (int i=0;i<Nstop;i++)
{
std::string evfile ("./evec_"+std::to_string(mass)+"_"+std::to_string(i));