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Patches for beginnings of an overlap multigrid

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This commit is contained in:
Peter Boyle
2015-06-20 22:22:56 +01:00
parent a0d4f832cf
commit b4a6dbfa65
11 changed files with 285 additions and 198 deletions
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25
lib/algorithms/iterative/ConjugateGradient.h
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@ -15,7 +15,7 @@ public:
Integer MaxIterations;
int verbose;
ConjugateGradient(RealD tol,Integer maxit) : Tolerance(tol), MaxIterations(maxit) {
verbose=1;
verbose=0;
};
@ -58,7 +58,7 @@ public:
return;
}
std::cout << std::setprecision(4)<< "ConjugateGradient: k=0 residual "<<cp<<" rsq"<<rsq<<std::endl;
if(verbose) std::cout << std::setprecision(4)<< "ConjugateGradient: k=0 residual "<<cp<<" rsq"<<rsq<<std::endl;
int k;
for (k=1;k<=MaxIterations;k++){
@ -69,23 +69,29 @@ 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;
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;
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;
// std::cout <<std::setprecision(4)<< "ConjugateGradient: cp,b "<<cp<< " "<<b <<std::endl;
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;
p = p*b+r;
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 ) {
@ -98,9 +104,10 @@ public:
RealD resnorm = sqrt(norm2(p));
RealD true_residual = resnorm/srcnorm;
std::cout<<"ConjugateGradient: Converged on iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
std::cout<<"ConjugateGradient: true residual is "<<true_residual<<" sol "<<psinorm<<" src "<<srcnorm<<std::endl;
std::cout<<"ConjugateGradient: target residual was "<<Tolerance<<std::endl;
std::cout<<"ConjugateGradient: Converged on iteration " <<k
<<" computed residual "<<sqrt(cp/ssq)
<<" true residual "<<true_residual
<<" target "<<Tolerance<<std::endl;
return;
}
}