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Variable preconditioned GCR with restarting.

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Orthogonalisation depth and restart frequency is controllable via constructor
This commit is contained in:
Azusa Yamaguchi
2015-06-21 10:58:46 +01:00
parent c7d77dfa0f
commit 3b4118f33e
9 changed files with 222 additions and 72 deletions
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10
lib/algorithms/iterative/ConjugateGradient.h
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@ -69,16 +69,12 @@ public:
RealD qqck = norm2(mmp);
ComplexD dck = innerProduct(p,mmp);
if (verbose) std::cout <<std::setprecision(4)<< "ConjugateGradient: d,qq "<<d<< " "<<qq <<" qqcheck "<< qqck<< " dck "<< dck<<std::endl;
a = c/d;
b_pred = a*(a*qq-d)/c;
if (verbose) std::cout <<std::setprecision(4)<< "ConjugateGradient: a,bp "<<a<< " "<<b_pred <<std::endl;
cp = axpy_norm(r,-a,mmp,r);
b = cp/c;
if (verbose) std::cout <<std::setprecision(4)<< "ConjugateGradient: cp,b "<<cp<< " "<<b <<std::endl;
// Fuse these loops ; should be really easy
psi= a*p+psi;
@ -86,12 +82,6 @@ public:
if (verbose) std::cout<<"ConjugateGradient: Iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
if (0) {
Field tmp(src._grid);
Linop.HermOpAndNorm(psi,tmp,qqck,qqck);
tmp=tmp-src;
std::cout<<"ConjugateGradient: true residual is "<< norm2(tmp);
}
// Stopping condition
if ( cp <= rsq ) {