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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 2534199ee7
commit aba5c8595a
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;
}
}

15
lib/algorithms/iterative/ConjugateResidual.h
View File

@@ -16,7 +16,7 @@ namespace Grid {
int verbose;
ConjugateResidual(RealD tol,Integer maxit) : Tolerance(tol), MaxIterations(maxit) {
verbose=1;
verbose=0;
};
void operator() (LinearOperatorBase<Field> &Linop,const Field &src, Field &psi){
@@ -37,8 +37,8 @@ namespace Grid {
Linop.HermOpAndNorm(p,Ap,pAp,pAAp);
Linop.HermOpAndNorm(r,Ar,rAr,rAAr);
std::cout << "pAp, pAAp"<< pAp<<" "<<pAAp<<std::endl;
std::cout << "rAr, rAAr"<< rAr<<" "<<rAAr<<std::endl;
if(verbose) std::cout << "pAp, pAAp"<< pAp<<" "<<pAAp<<std::endl;
if(verbose) std::cout << "rAr, rAAr"<< rAr<<" "<<rAAr<<std::endl;
cp =norm2(r);
ssq=norm2(src);
@@ -63,15 +63,16 @@ namespace Grid {
axpy(p,b,p,r);
pAAp=axpy_norm(Ap,b,Ap,Ar);
std::cout<<"ConjugateResidual: iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
if(verbose) std::cout<<"ConjugateResidual: iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
if(cp<rsq) {
Linop.HermOp(psi,Ap);
axpy(r,-1.0,src,Ap);
RealD true_resid = norm2(r);
std::cout<<"ConjugateResidual: Converged on iteration " <<k<<" residual "<<cp<< " target"<< rsq<<std::endl;
std::cout<<"ConjugateResidual: true residual is "<<true_resid<<std::endl;
std::cout<<"ConjugateResidual: target residual was "<<Tolerance <<std::endl;
std::cout<<"ConjugateResidual: Converged on iteration " <<k
<< " computed residual "<<sqrt(cp/ssq)
<< " true residual "<<true_resid
<< " target " <<Tolerance <<std::endl;
return;
}