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This commit is contained in:
Peter Boyle
2019-12-09 02:54:52 -05:00
parent 2912071f83
commit 0dfdf80407
1 changed files with 26 additions and 12 deletions
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38
Grid/algorithms/iterative/PrecGeneralisedConjugateResidual.h
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@@ -86,7 +86,7 @@ public:
cp=GCRnStep(Linop,src,psi,rsq);
std::cout<<GridLogMessage<<"VPGCR("<<mmax<<","<<nstep<<") "<< steps <<" steps cp = "<<cp<<std::endl;
std::cout<<GridLogMessage<<"VPGCR("<<mmax<<","<<nstep<<") "<< steps <<" steps cp = "<<cp<<" target "<<rsq <<std::endl;
if(cp<rsq) {
@@ -134,6 +134,9 @@ public:
std::vector<Field> p(mmax,grid);
std::vector<RealD> qq(mmax);
std::cout<<GridLogIterative<< " ************** "<< std::endl;
std::cout<<GridLogIterative<< " GCRnStep("<<nstep<<")"<<std::endl;
std::cout<<GridLogIterative<< " ************** "<< std::endl;
//////////////////////////////////
// initial guess x0 is taken as nonzero.
@@ -143,25 +146,32 @@ public:
Linop.HermOpAndNorm(psi,Az,zAz,zAAz);
MatTimer.Stop();
LinalgTimer.Start();
r=src-Az;
LinalgTimer.Stop();
std::cout<<GridLogIterative<< " GCRnStep true residual r = src - A psi "<<norm2(r) <<std::endl;
/////////////////////
// p = Prec(r)
/////////////////////
std::cout<<GridLogIterative<< " GCRnStep apply preconditioner z= M^-1 r "<< std::endl;
std::cout<<GridLogIterative<< " --------------------------------------- "<< std::endl;
PrecTimer.Start();
Preconditioner(r,z);
PrecTimer.Stop();
std::cout<<GridLogIterative<< " --------------------------------------- "<< std::endl;
std::cout<<GridLogIterative<< " GCRnStep called Preconditioner z "<< norm2(z) <<std::endl;
MatTimer.Start();
Linop.HermOp(z,tmp);
MatTimer.Stop();
// MatTimer.Start();
// Linop.HermOp(z,tmp);
// MatTimer.Stop();
LinalgTimer.Start();
ttmp=tmp;
tmp=tmp-r;
LinalgTimer.Stop();
// LinalgTimer.Start();
// ttmp=tmp;
// tmp=tmp-r;
// LinalgTimer.Stop();
/*
std::cout<<GridLogMessage<<r<<std::endl;
@@ -175,10 +185,12 @@ public:
MatTimer.Stop();
LinalgTimer.Start();
//p[0],q[0],qq[0]
p[0]= z;
q[0]= Az;
qq[0]= zAAz;
std::cout<<GridLogIterative<< " GCRnStep p0=z, q0 = A p0 " <<std::endl;
cp =norm2(r);
LinalgTimer.Stop();
@@ -200,24 +212,26 @@ public:
cp = axpy_norm(r,-a,q[peri_k],r);
LinalgTimer.Stop();
std::cout<<GridLogMessage<< " VPGCR_step["<<steps<<"] resid " << cp << " target " <<rsq<<std::endl;
if((k==nstep-1)||(cp<rsq)){
return cp;
}
std::cout<<GridLogMessage<< " VPGCR_step["<<steps<<"] resid " <<sqrt(cp/rsq)<<std::endl;
std::cout<<GridLogIterative<< " GCRnStep apply preconditioner z= M^-1 r "<< std::endl;
std::cout<<GridLogIterative<< " --------------------------------------- "<< std::endl;
PrecTimer.Start();
Preconditioner(r,z);// solve Az = r
PrecTimer.Stop();
std::cout<<GridLogIterative<< " --------------------------------------- "<< std::endl;
std::cout<<GridLogIterative<< " GCRnStep called Preconditioner z "<< norm2(z) <<std::endl;
MatTimer.Start();
Linop.HermOpAndNorm(z,Az,zAz,zAAz);
Linop.HermOp(z,tmp);
MatTimer.Stop();
LinalgTimer.Start();
tmp=tmp-r;
std::cout<<GridLogMessage<< " Preconditioner resid " <<sqrt(norm2(tmp)/norm2(r))<<std::endl;
q[peri_kp]=Az;
p[peri_kp]=z;