void
LSQRSolMgr<ScalarType,MV,OP,false>::
setParameters (const Teuchos::RCP<Teuchos::ParameterList> ¶ms)
{
using Teuchos::isParameterType;
using Teuchos::getParameter;
using Teuchos::null;
using Teuchos::ParameterList;
using Teuchos::parameterList;
using Teuchos::RCP;
using Teuchos::rcp;
using Teuchos::rcp_dynamic_cast;
using Teuchos::rcpFromRef;
using Teuchos::Time;
using Teuchos::TimeMonitor;
using Teuchos::Exceptions::InvalidParameter;
using Teuchos::Exceptions::InvalidParameterName;
using Teuchos::Exceptions::InvalidParameterType;
TEUCHOS_TEST_FOR_EXCEPTION(params.is_null(), std::invalid_argument,
"Belos::LSQRSolMgr::setParameters: "
"the input ParameterList is null.");
RCP<const ParameterList> defaultParams = getValidParameters ();
params->validateParametersAndSetDefaults (*defaultParams);
// At this point, params is a valid parameter list with defaults
// filled in. Now we can "commit" it to our instance's parameter
// list.
params_ = params;
// Get the damping (a.k.a. regularization) parameter lambda.
lambda_ = params->get<MagnitudeType> ("Lambda");
// Get the maximum number of iterations.
maxIters_ = params->get<int>("Maximum Iterations");
// (Re)set the timer label.
{
const std::string newLabel = params->get<std::string>("Timer Label");
// Update parameter in our list and solver timer
if (newLabel != label_) {
label_ = newLabel;
}
#ifdef BELOS_TEUCHOS_TIME_MONITOR
std::string newSolveLabel = label_ + ": LSQRSolMgr total solve time";
if (timerSolve_.is_null()) {
// Ask TimeMonitor for a new timer.
timerSolve_ = TimeMonitor::getNewCounter (newSolveLabel);
} else {
// We've already created a timer, but we may have changed its
// label. If we did change its name, then we have to forget
// about the old timer and create a new one with a different
// name. This is because Teuchos::Time doesn't give you a way
// to change a timer's name, once you've created it. We assume
// that if the user changed the timer's label, then the user
// wants to reset the timer's results.
const std::string oldSolveLabel = timerSolve_->name ();
if (oldSolveLabel != newSolveLabel) {
// Tell TimeMonitor to forget about the old timer.
// TimeMonitor lets you clear timers by name.
TimeMonitor::clearCounter (oldSolveLabel);
timerSolve_ = TimeMonitor::getNewCounter (newSolveLabel);
}
}
#endif // BELOS_TEUCHOS_TIME_MONITOR
}
// Check for a change in verbosity level
{
int newVerbosity = 0;
// ParameterList gets confused sometimes about enums. This
// ensures that no matter how "Verbosity" was stored -- either an
// an int, or as a Belos::MsgType enum, we will be able to extract
// it. If it was stored as some other type, we let the exception
// through.
try {
newVerbosity = params->get<Belos::MsgType> ("Verbosity");
} catch (Teuchos::Exceptions::InvalidParameterType&) {
newVerbosity = params->get<int> ("Verbosity");
}
if (newVerbosity != verbosity_) {
verbosity_ = newVerbosity;
}
}
// (Re)set the output style.
outputStyle_ = params->get<int> ("Output Style");
// Get the output stream for the output manager.
//
// In case the output stream can't be read back in, we default to
// stdout (std::cout), just to ensure reasonable behavior.
{
outputStream_ = params->get<RCP<std::ostream> > ("Output Stream");
// We assume that a null output stream indicates that the user
// doesn't want to print anything, so we replace it with a "black
// hole" stream that prints nothing sent to it. (We can't use a
// null output stream, since the output manager always sends
// things it wants to print to the output stream.)
if (outputStream_.is_null())
outputStream_ = rcp (new Teuchos::oblackholestream);
}
// Get the frequency of solver output. (For example, -1 means
// "never," 1 means "every iteration.")
outputFreq_ = params->get<int> ("Output Frequency");
// Create output manager if we need to, using the verbosity level
// and output stream that we fetched above. We do this here because
// instantiating an OrthoManager using OrthoManagerFactory requires
// a valid OutputManager.
if (printer_.is_null()) {
printer_ = rcp (new OutputManager<ScalarType> (verbosity_, outputStream_));
} else {
printer_->setVerbosity (verbosity_);
printer_->setOStream (outputStream_);
}
// Check if the orthogonalization changed, or if we need to
// initialize it.
typedef OrthoManagerFactory<ScalarType, MV, OP> factory_type;
factory_type factory;
bool mustMakeOrtho = false;
{
std::string tempOrthoType;
try {
tempOrthoType = params_->get<std::string> ("Orthogonalization");
} catch (InvalidParameterName&) {
tempOrthoType = orthoType_;
}
if (ortho_.is_null() || tempOrthoType != orthoType_) {
mustMakeOrtho = true;
// Ensure that the specified orthogonalization type is valid.
if (! factory.isValidName (tempOrthoType)) {
std::ostringstream os;
os << "Belos::LSQRSolMgr: Invalid orthogonalization name \""
<< tempOrthoType << "\". The following are valid options "
<< "for the \"Orthogonalization\" name parameter: ";
factory.printValidNames (os);
TEUCHOS_TEST_FOR_EXCEPTION(true, std::invalid_argument, os.str());
}
orthoType_ = tempOrthoType; // The name is valid, so accept it.
params_->set ("Orthogonalization", orthoType_);
}
}
// Get any parameters for the orthogonalization ("Orthogonalization
// Parameters"). If not supplied, the orthogonalization manager
// factory will supply default values.
//
// NOTE (mfh 21 Oct 2011) For the sake of backwards compatibility,
// if params has an "Orthogonalization Constant" parameter and the
// DGKS orthogonalization manager is to be used, the value of this
// parameter will override DGKS's "depTol" parameter.
//
// Users must supply the orthogonalization manager parameters as a
// sublist (supplying it as an RCP<ParameterList> would make the
// resulting parameter list not serializable).
RCP<ParameterList> orthoParams;
{ // The nonmember function returns an RCP<ParameterList>,
// which is what we want here.
using Teuchos::sublist;
// Abbreviation to avoid typos.
const std::string paramName ("Orthogonalization Parameters");
try {
orthoParams = sublist (params_, paramName, true);
} catch (InvalidParameter&) {
// We didn't get the parameter list from params, so get a
// default parameter list from the OrthoManagerFactory.
// Modify params_ so that it has the default parameter list,
// and set orthoParams to ensure it's a sublist of params_
// (and not just a copy of one).
params_->set (paramName, factory.getDefaultParameters (orthoType_));
orthoParams = sublist (params_, paramName, true);
}
}
TEUCHOS_TEST_FOR_EXCEPTION(orthoParams.is_null(), std::logic_error,
"Failed to get orthogonalization parameters. "
"Please report this bug to the Belos developers.");
// If we need to, instantiate a new MatOrthoManager subclass
// instance corresponding to the desired orthogonalization method.
// We've already fetched the orthogonalization method name
// (orthoType_) and its parameters (orthoParams) above.
//
// NOTE (mfh 21 Oct 2011) We only instantiate a new MatOrthoManager
// subclass if the orthogonalization method name is different than
// before. Thus, for some orthogonalization managers, changes to
// their parameters may not get propagated, if the manager type
// itself didn't change. The one exception is the "depTol"
// (a.k.a. orthoKappa or "Orthogonalization Constant") parameter of
// DGKS; changes to that _do_ get propagated down to the DGKS
// instance.
//
// The most general way to fix this issue would be to supply each
// orthogonalization manager class with a setParameterList() method
// that takes a parameter list input, and changes the parameters as
// appropriate. A less efficient but correct way would be simply to
// reinstantiate the OrthoManager every time, whether or not the
// orthogonalization method name or parameters have changed.
if (mustMakeOrtho) {
// Create orthogonalization manager. This requires that the
// OutputManager (printer_) already be initialized. LSQR
// currently only orthogonalizes with respect to the Euclidean
// inner product, so we set the inner product matrix M to null.
RCP<const OP> M = null;
ortho_ = factory.makeMatOrthoManager (orthoType_, M, printer_,
label_, orthoParams);
}
TEUCHOS_TEST_FOR_EXCEPTION(ortho_.is_null(), std::logic_error,
"The MatOrthoManager is not yet initialized, but "
"should be by this point. "
"Please report this bug to the Belos developers.");
// Check which orthogonalization constant to use. We only need this
// if orthoType_ == "DGKS" (and we already fetched the orthoType_
// parameter above).
if (orthoType_ == "DGKS") {
if (params->isParameter ("Orthogonalization Constant")) {
orthoKappa_ = params_->get<MagnitudeType> ("Orthogonalization Constant");
if (orthoKappa_ > 0 && ! ortho_.is_null()) {
typedef DGKSOrthoManager<ScalarType,MV,OP> ortho_impl_type;
rcp_dynamic_cast<ortho_impl_type> (ortho_)->setDepTol (orthoKappa_);
}
}
}
// Check for condition number limit, number of consecutive passed
// iterations, relative RHS error, and relative matrix error.
// Create the LSQR convergence test if necessary.
{
condMax_ = params->get<MagnitudeType> ("Condition Limit");
termIterMax_ = params->get<int>("Term Iter Max");
relRhsErr_ = params->get<MagnitudeType> ("Rel RHS Err");
relMatErr_ = params->get<MagnitudeType> ("Rel Mat Err");
// Create the LSQR convergence test if it doesn't exist yet.
// Otherwise, update its parameters.
if (convTest_.is_null()) {
convTest_ =
rcp (new LSQRStatusTest<ScalarType,MV,OP> (condMax_, termIterMax_,
relRhsErr_, relMatErr_));
} else {
convTest_->setCondLim (condMax_);
convTest_->setTermIterMax (termIterMax_);
convTest_->setRelRhsErr (relRhsErr_);
convTest_->setRelMatErr (relMatErr_);
}
}
// Create the status test for maximum number of iterations if
// necessary. Otherwise, update it with the new maximum iteration
// count.
if (maxIterTest_.is_null()) {
maxIterTest_ = rcp (new StatusTestMaxIters<ScalarType,MV,OP> (maxIters_));
} else {
maxIterTest_->setMaxIters (maxIters_);
}
// The stopping criterion is an OR combination of the test for
// maximum number of iterations, and the LSQR convergence test.
// ("OR combination" means that both tests will always be evaluated,
// as opposed to a SEQ combination.)
typedef StatusTestCombo<ScalarType,MV,OP> StatusTestCombo_t;
// If sTest_ is not null, then maxIterTest_ and convTest_ were
// already constructed on entry to this routine, and sTest_ has
// their pointers. Thus, maxIterTest_ and convTest_ have gotten any
// parameter changes, so we don't need to do anything to sTest_.
if (sTest_.is_null()) {
sTest_ = rcp (new StatusTestCombo_t (StatusTestCombo_t::OR,
maxIterTest_,
convTest_));
}
if (outputTest_.is_null()) {
// Create the status test output class.
// This class manages and formats the output from the status test.
StatusTestOutputFactory<ScalarType,MV,OP> stoFactory (outputStyle_);
outputTest_ = stoFactory.create (printer_, sTest_, outputFreq_,
Passed + Failed + Undefined);
// Set the solver string for the output test.
const std::string solverDesc = " LSQR ";
outputTest_->setSolverDesc (solverDesc);
} else {
// FIXME (mfh 18 Sep 2011) How do we change the output style of
// outputTest_, without destroying and recreating it?
outputTest_->setOutputManager (printer_);
outputTest_->setChild (sTest_);
outputTest_->setOutputFrequency (outputFreq_);
// Since outputTest_ can only be created here, I'm assuming that
// the fourth constructor argument ("printStates") was set
// correctly on constrution; I don't need to reset it (and I can't
// set it anyway, given StatusTestOutput's interface).
}
// Inform the solver manager that the current parameters were set.
isSet_ = true;
}
void
MinresSolMgr<ScalarType, MV, OP>::
setParameters (const Teuchos::RCP<Teuchos::ParameterList>& params)
{
using Teuchos::ParameterList;
using Teuchos::parameterList;
using Teuchos::RCP;
using Teuchos::rcp;
using Teuchos::rcpFromRef;
using Teuchos::null;
using Teuchos::is_null;
using std::string;
using std::ostream;
using std::endl;
if (params_.is_null()) {
params_ = parameterList (*getValidParameters());
}
RCP<ParameterList> pl = params;
pl->validateParametersAndSetDefaults (*params_);
//
// Read parameters from the parameter list. We have already
// populated it with defaults.
//
blockSize_ = pl->get<int> ("Block Size");
verbosity_ = pl->get<int> ("Verbosity");
outputStyle_ = pl->get<int> ("Output Style");
outputFreq_ = pl->get<int>("Output Frequency");
outputStream_ = pl->get<RCP<std::ostream> > ("Output Stream");
convtol_ = pl->get<MagnitudeType> ("Convergence Tolerance");
maxIters_ = pl->get<int> ("Maximum Iterations");
//
// All done reading parameters from the parameter list.
// Now we know it's valid and we can store it.
//
params_ = pl;
// Change the timer label, and create the timer if necessary.
const string newLabel = pl->get<string> ("Timer Label");
{
if (newLabel != label_ || timerSolve_.is_null()) {
label_ = newLabel;
#ifdef BELOS_TEUCHOS_TIME_MONITOR
const string solveLabel = label_ + ": MinresSolMgr total solve time";
// Unregister the old timer before creating a new one.
if (! timerSolve_.is_null()) {
Teuchos::TimeMonitor::clearCounter (label_);
timerSolve_ = Teuchos::null;
}
timerSolve_ = Teuchos::TimeMonitor::getNewCounter (solveLabel);
#endif // BELOS_TEUCHOS_TIME_MONITOR
}
}
// Create output manager, if necessary; otherwise, set its parameters.
bool recreatedPrinter = false;
if (printer_.is_null()) {
printer_ = rcp (new OutputManager<ScalarType> (verbosity_, outputStream_));
recreatedPrinter = true;
} else {
// Set the output stream's verbosity level.
printer_->setVerbosity (verbosity_);
// Tell the output manager about the new output stream.
printer_->setOStream (outputStream_);
}
//
// Set up the convergence tests
//
typedef StatusTestGenResNorm<ScalarType, MV, OP> res_norm_type;
typedef StatusTestCombo<ScalarType, MV, OP> combo_type;
// Do we need to allocate at least one of the implicit or explicit
// residual norm convergence tests?
const bool allocatedConvergenceTests =
impConvTest_.is_null() || expConvTest_.is_null();
// Allocate or set the tolerance of the implicit residual norm
// convergence test.
if (impConvTest_.is_null()) {
impConvTest_ = rcp (new res_norm_type (convtol_));
impConvTest_->defineResForm (res_norm_type::Implicit, TwoNorm);
// TODO (mfh 03 Nov 2011) Allow users to define the type of
// scaling (or a custom scaling factor).
impConvTest_->defineScaleForm (NormOfInitRes, TwoNorm);
} else {
impConvTest_->setTolerance (convtol_);
}
// Allocate or set the tolerance of the explicit residual norm
// convergence test.
if (expConvTest_.is_null()) {
expConvTest_ = rcp (new res_norm_type (convtol_));
expConvTest_->defineResForm (res_norm_type::Explicit, TwoNorm);
// TODO (mfh 03 Nov 2011) Allow users to define the type of
// scaling (or a custom scaling factor).
expConvTest_->defineScaleForm (NormOfInitRes, TwoNorm);
} else {
expConvTest_->setTolerance (convtol_);
}
// Whether we need to recreate the full status test. We only need
// to do that if at least one of convTest_ or maxIterTest_ had to
// be reallocated.
bool needToRecreateFullStatusTest = sTest_.is_null();
// Residual status test is a combo of the implicit and explicit
// convergence tests.
if (convTest_.is_null() || allocatedConvergenceTests) {
convTest_ = rcp (new combo_type (combo_type::SEQ, impConvTest_, expConvTest_));
needToRecreateFullStatusTest = true;
}
// Maximum number of iterations status test. It tells the solver to
// stop iteration, if the maximum number of iterations has been
// exceeded. Initialize it if we haven't yet done so, otherwise
// tell it the new maximum number of iterations.
if (maxIterTest_.is_null()) {
maxIterTest_ = rcp (new StatusTestMaxIters<ScalarType,MV,OP> (maxIters_));
needToRecreateFullStatusTest = true;
} else {
maxIterTest_->setMaxIters (maxIters_);
}
// Create the full status test if we need to.
//
// The full status test: the maximum number of iterations have
// been reached, OR the residual has converged.
//
// "If we need to" means either that the status test was never
// created before, or that its two component tests had to be
// reallocated.
if (needToRecreateFullStatusTest) {
sTest_ = rcp (new combo_type (combo_type::OR, maxIterTest_, convTest_));
}
// If necessary, create the status test output class. This class
// manages and formats the output from the status test. We have
// to recreate the output test if we had to (re)allocate either
// printer_ or sTest_.
if (outputTest_.is_null() || needToRecreateFullStatusTest || recreatedPrinter) {
StatusTestOutputFactory<ScalarType,MV,OP> stoFactory (outputStyle_);
outputTest_ = stoFactory.create (printer_, sTest_, outputFreq_,
Passed+Failed+Undefined);
} else {
outputTest_->setOutputFrequency (outputFreq_);
}
// Set the solver string for the output test.
// StatusTestOutputFactory has no constructor argument for this.
outputTest_->setSolverDesc (std::string (" MINRES "));
// Inform the solver manager that the current parameters were set.
parametersSet_ = true;
if (verbosity_ & Debug) {
using std::endl;
std::ostream& dbg = printer_->stream (Debug);
dbg << "MINRES parameters:" << endl << params_ << endl;
}
}
