void
Albany::SolutionMaxValueResponseFunction::
computeMaxValue(const Epetra_Vector& x, double& global_max, int& global_index)
{
double my_max = -Epetra_MaxDouble;
int my_index = -1, index;
// Loop over nodes to find max value for equation eq
int num_my_nodes = x.MyLength() / neq;
for (int node=0; node<num_my_nodes; node++) {
if (interleavedOrdering) index = node*neq+eq;
else index = node + eq*num_my_nodes;
if (x[index] > my_max) {
my_max = x[index];
my_index = index;
}
}
// Get max value across all proc's
x.Comm().MaxAll(&my_max, &global_max, 1);
// Compute min of all global indices equal to max value
if (my_max == global_max)
my_index = x.Map().GID(my_index);
else
my_index = x.GlobalLength();
x.Comm().MinAll(&my_index, &global_index, 1);
}
int Ifpack_AnalyzeVectorElements(const Epetra_Vector& Diagonal,
const bool abs, const int steps)
{
bool verbose = (Diagonal.Comm().MyPID() == 0);
double min_val = DBL_MAX;
double max_val = -DBL_MAX;
for (int i = 0 ; i < Diagonal.MyLength() ; ++i) {
double v = Diagonal[i];
if (abs)
if (v < 0) v = -v;
if (v > max_val)
max_val = v;
if (v < min_val)
min_val = v;
}
if (verbose) {
cout << endl;
Ifpack_PrintLine();
cout << "Vector label = " << Diagonal.Label() << endl;
cout << endl;
}
double delta = (max_val - min_val) / steps;
for (int k = 0 ; k < steps ; ++k) {
double below = delta * k + min_val;
double above = below + delta;
int MyBelow = 0, GlobalBelow;
for (int i = 0 ; i < Diagonal.MyLength() ; ++i) {
double v = Diagonal[i];
if (v < 0) v = -v;
if (v >= below && v < above) MyBelow++;
}
Diagonal.Comm().SumAll(&MyBelow, &GlobalBelow, 1);
if (verbose) {
printf("Elements in [%+7e, %+7e) = %10d ( = %5.2f %%)\n",
below, above, GlobalBelow,
100.0 * GlobalBelow / Diagonal.GlobalLength64());
}
}
if (verbose) {
Ifpack_PrintLine();
cout << endl;
}
return(0);
}
void observeSolution(
const Epetra_Vector& solution)
{
double norm; solution.Norm2(&norm);
if (solution.Comm().MyPID()==0)
std::cout << "ObserveSolution: Norm = " << norm << std::endl;
}
void observeSolution(
const Epetra_Vector& solution, double time_or_param_val)
{
double norm; solution.Norm2(&norm);
if (solution.Comm().MyPID()==0)
std::cout << "ObserveSolution: Norm = " << norm
<< " for param/time = " << time_or_param_val << std::endl;
}
/******************************************************************
Compute weight balance
******************************************************************/
int compute_balance(const Epetra_Vector &wgts, double myGoalWeight,
double &min, double &max, double &avg)
{
if ((myGoalWeight < 0) || (myGoalWeight > 1.0)){
std::cerr << "compute_balance: Goal weight should be in the range [0, 1]" << std::endl;
return -1;
}
double weightTotal;
wgts.Norm1(&weightTotal);
double weightLocal = 0.0;
for (int i=0; i < wgts.MyLength(); i++){
weightLocal += wgts[i];
}
/* My degree of imbalance.
* If myGoalWeight is zero, I'm in perfect balance since I got what I wanted.
*/
double goalWeight = myGoalWeight * weightTotal;
double imbalance = 1.0;
if (myGoalWeight > 0.0){
if (weightLocal >= goalWeight)
imbalance += (weightLocal - goalWeight) / goalWeight;
else
imbalance += (goalWeight - weightLocal) / goalWeight;
}
const Epetra_Comm &comm = wgts.Comm();
comm.MaxAll(&imbalance, &max, 1);
comm.MinAll(&imbalance, &min, 1);
comm.SumAll(&imbalance, &avg, 1);
avg /= comm.NumProc();
return 0;
}
bool FiniteDifferenceColoring::computeJacobian(const Epetra_Vector& x, Epetra_Operator& Jac)
{
// First check to make sure Jac is a
// NOX::Epetra::FiniteDifferenceColoring object
FiniteDifferenceColoring* testMatrix =
dynamic_cast<FiniteDifferenceColoring*>(&Jac);
if (testMatrix == 0) {
cout << "ERROR: NOX::Epetra::FiniteDifferenceColoring::computeJacobian() - "
<< "Jacobian to evaluate is not a FiniteDifferenceColoring object!"
<< endl;
throw "NOX Error";
}
const Epetra_BlockMap& map = fo.Map();
// Create a timer for performance
Epetra_Time fillTimer(x.Comm());
// We need the Epetra_CrsMatrix inside the FiniteDifferenceColoring object
// for the correct insertion commands.
Epetra_CrsMatrix& jac = *testMatrix->jacobian;
// Zero out Jacobian
jac.PutScalar(0.0);
// Create an extra perturbed residual vector pointer if needed
if ( diffType == Centered )
if ( Teuchos::is_null(fmPtr) )
fmPtr = Teuchos::rcp(new Epetra_Vector(x));
double scaleFactor = 1.0;
if ( diffType == Backward )
scaleFactor = -1.0;
int myMin = map.MinMyGID(); // Minimum locally owned GID
int myMax = map.MaxMyGID(); // Maximum locally owned GID
// We need to loop over the largest number of colors on a processor
// Use the overlap (column-space) version of the solution
xCol_perturb->Import(x, *rowColImporter, Insert);
// Compute the RHS at the initial solution
if( coloringType == NOX_SERIAL )
computeF(*xCol_perturb, fo, NOX::Epetra::Interface::Required::FD_Res);
else {
// x_perturb.Export(*xCol_perturb, *rowColImporter, Insert);
for (int i=0; i<x_perturb.MyLength(); i++)
x_perturb[i] = (*xCol_perturb)[columnMap->LID(map.GID(i))];
computeF(x_perturb, fo, NOX::Epetra::Interface::Required::FD_Res);
}
// loop over each color in the colorGraph
list<int>::iterator allBegin = listOfAllColors.begin(),
allEnd = listOfAllColors.end(),
allIter;
std::map<int, int>::iterator mapEnd = colorToNumMap.end(),
myMapIter;
for ( allIter = allBegin; allIter != allEnd; ++allIter ) {
bool skipIt = true; // Used to screen colors this proc does not have
int k = -1; // index in colorList of color
myMapIter = colorToNumMap.find( *allIter );
if( myMapIter != mapEnd ) {
skipIt = false;
k = (*myMapIter).second;
}
// Perturb the solution vector using coloring
// ----- First create color map and assoc perturbation vectors
int color = -1;
if( !skipIt ) color = colorList[k];
cMap = colorMap->GenerateMap(color);
colorVect = new Epetra_Vector(*cMap);
betaColorVect = new Epetra_Vector(*cMap);
betaColorVect->PutScalar(beta);
// ----- Fill colorVect with computed perturbation values
// NOTE that we do the mapping ourselves here instead of using an
// Epetra_Import object. This is to ensure local mapping only since
// Import/Export operations involve off-processor transfers, which we
// wish to avoid.
for (int i=0; i<colorVect->MyLength(); i++)
(*colorVect)[i] = (*xCol_perturb)[columnMap->LID(cMap->GID(i))];
colorVect->Abs(*colorVect);
colorVect->Update(1.0, *betaColorVect, alpha);
// ----- Map perturbation vector to original index space
// ----- and use it
mappedColorVect->PutScalar(0.0);
// Here again we do the mapping ourselves to avoid off-processor data
// transfers that would accompany use of Epetra_Import/Export objects.
for (int i=0; i<colorVect->MyLength(); i++)
(*mappedColorVect)[columnMap->LID(cMap->GID(i))] = (*colorVect)[i];
xCol_perturb->Update(scaleFactor, *mappedColorVect, 1.0);
// Compute the perturbed RHS
if( coloringType == NOX_SERIAL )
computeF(*xCol_perturb, fp, NOX::Epetra::Interface::Required::FD_Res);
else {
//x_perturb.Export(*xCol_perturb, *rowColImporter, Insert);
for (int i=0; i<x_perturb.MyLength(); i++)
x_perturb[i] = (*xCol_perturb)[columnMap->LID(map.GID(i))];
computeF(x_perturb, fp, NOX::Epetra::Interface::Required::FD_Res);
}
if ( diffType == Centered ) {
xCol_perturb->Update(-2.0, *mappedColorVect, 1.0);
if( coloringType == NOX_SERIAL )
computeF(*xCol_perturb, *fmPtr,
NOX::Epetra::Interface::Required::FD_Res);
else {
//x_perturb.Export(*xCol_perturb, *rowColImporter, Insert);
for (int i=0; i<x_perturb.MyLength(); i++)
x_perturb[i] = (*xCol_perturb)[columnMap->LID(map.GID(i))];
computeF(x_perturb, *fmPtr, NOX::Epetra::Interface::Required::FD_Res);
}
}
// Compute the column k of the Jacobian
// Note that division by the perturbation is delayed until insertion below
if ( diffType != Centered ) {
Jc.Update(1.0, fp, -1.0, fo, 0.0);
}
else {
Jc.Update(1.0, fp, -1.0, *fmPtr, 0.0);
}
// Insert nonzero column entries into the jacobian
if( !skipIt ) {
for (int j = myMin; j < myMax+1; j++) {
// Allow for the possibility that rows j from myMin to myMax are not necessarily contigous
if (!map.MyGID(j))
continue;
int globalColumnID = (*columns)[k][map.LID(j)];
// If using distance1 coloring, only allow diagonal fills
if( distance1 && (j != globalColumnID) )
continue; // Skip off-diagonals
if( globalColumnID >= 0) {
// Now complete the approximation to the derivative by dividing by
// the appropriate perturbation
if ( diffType != Centered )
Jc[map.LID(j)] /=
(scaleFactor * (*mappedColorVect)[columnMap->LID(globalColumnID)]);
else
Jc[map.LID(j)] /=
(2.0 * (*mappedColorVect)[columnMap->LID(globalColumnID)]);
int err = jac.ReplaceGlobalValues(j,1,&Jc[map.LID(j)],&globalColumnID);
if(err) {
cout << "ERROR (" << map.Comm().MyPID() << ") : "
<< "Inserting global value with indices (" << j << ","
<< globalColumnID << ") = " << Jc[map.LID(j)] << endl;
}
}
}
}
// Clean up memory for color-dependent objects
delete Importer; Importer = 0;
delete betaColorVect; betaColorVect = 0;
delete colorVect; colorVect = 0;
delete cMap; cMap = 0;
// Unperturb the solution vector
xCol_perturb->Import(x, *rowColImporter, Insert);
}
double fillTime = fillTimer.ElapsedTime();
x.Comm().Barrier();
if (utils.isPrintType(Utils::Details)) {
for(int n = 0; n < map.Comm().NumProc(); n++) {
if(map.Comm().MyPID() == n)
cout << "\tTime to fill Jacobian [" << n << "] --> "
<< fillTime << " sec." << endl;
x.Comm().Barrier();
}
cout << endl;
}
jac.FillComplete();
return true;
}
bool FiniteDifferenceColoringWithUpdate::differenceProbe(const Epetra_Vector& x, Epetra_CrsMatrix& jac,const Epetra_MapColoring& colors){
// Allocate space for perturbation, get column version of x for scaling
Epetra_Vector xp(x);
Epetra_Vector *xcol;
int N=jac.NumMyRows();
if(jac.ColMap().SameAs(x.Map()))
xcol=const_cast<Epetra_Vector*>(&x);
else{
xcol=new Epetra_Vector(jac.ColMap(),true);//zeros out by default
xcol->Import(x,*jac.Importer(),InsertAdd);
}
// Counters for probing diagnostics
double tmp,probing_error_lower_bound=0.0,jc_norm=0.0;
// Grab coloring info (being very careful to ignore color 0)
int Ncolors=colors.MaxNumColors()+1;
int num_c0_global,num_c0_local=colors.NumElementsWithColor(0);
colors.Comm().MaxAll(&num_c0_local,&num_c0_global,1);
if(num_c0_global>0) Ncolors--;
if(Ncolors==0) return false;
// Pointers for Matrix Info
int entries, *indices;
double *values;
// NTS: Fix me
if ( diffType == Centered ) exit(1);
double scaleFactor = 1.0;
if ( diffType == Backward )
scaleFactor = -1.0;
// Compute RHS at initial solution
computeF(x,fo,NOX::Epetra::Interface::Required::FD_Res);
/* Probing, vector by vector since computeF does not have a MultiVector interface */
// Assume that anything with Color 0 gets ignored.
for(int j=1;j<Ncolors;j++){
xp=x;
for(int i=0;i<N;i++){
if(colors[i]==j)
xp[i] += scaleFactor*(alpha*abs(x[i])+beta);
}
computeF(xp, fp, NOX::Epetra::Interface::Required::FD_Res);
// Do the subtraction to estimate the Jacobian (w/o including step length)
Jc.Update(1.0, fp, -1.0, fo, 0.0);
// Relative error in probing
if(use_probing_diags){
Jc.Norm2(&tmp);
jc_norm+=tmp*tmp;
}
for(int i=0;i<N;i++){
// Skip for uncolored row/columns, else update entries
if(colors[i]==0) continue;
jac.ExtractMyRowView(i,entries,values,indices);
for(int k=0;k<jac.NumMyEntries(i);k++){
if(colors[indices[k]]==j){
values[k]=Jc[i] / (scaleFactor*(alpha*abs((*xcol)[indices[k]])+beta));
// If probing diagnostics are on, zero out the entries as they are used
if(use_probing_diags) Jc[i]=0.0;
break;// Only one value per row...
}
}
}
if(use_probing_diags){
Jc.Norm2(&tmp);
probing_error_lower_bound+=tmp*tmp;
}
}
// If diagnostics are requested, output Frobenius norm lower bound
if(use_probing_diags && !x.Comm().MyPID()) printf("Probing Error Lower Bound (Frobenius) abs = %6.4e rel = %6.4e\n",sqrt(probing_error_lower_bound),sqrt(probing_error_lower_bound)/sqrt(jc_norm));
// Cleanup
if(!jac.ColMap().SameAs(x.Map()))
delete xcol;
return true;
}
