void TrashSizeCache::remove( qulonglong value )
{
KInterProcessLock lock( QLatin1String( "trash" ) );
lock.lock();
lock.waitForLockGranted();
KConfig config( mTrashSizeCachePath );
KConfigGroup group = config.group( mTrashSizeGroup );
qulonglong size = currentSize( false );
size -= value;
group.writeEntry( mTrashSizeKey, size );
config.sync();
lock.unlock();
}
int ARPACKm3::reSolve(int numEigen, Epetra_MultiVector &Q, double *lambda, int startingEV) {
// Computes eigenvalues and the corresponding eigenvectors
// of the generalized eigenvalue problem
//
// K X = M X Lambda
//
// using ARPACK (mode 3).
//
// The convergence test is provided by ARPACK.
//
// Note that if M is not specified, then K X = X Lambda is solved.
// (using the mode for generalized eigenvalue problem).
//
// Input variables:
//
// numEigen (integer) = Number of eigenmodes requested
//
// Q (Epetra_MultiVector) = Initial search space
// The number of columns of Q defines the size of search space (=NCV).
// The rows of X are distributed across processors.
// As a rule of thumb in ARPACK User's guide, NCV >= 2*numEigen.
// At exit, the first numEigen locations contain the eigenvectors requested.
//
// lambda (array of doubles) = Converged eigenvalues
// The length of this array is equal to the number of columns in Q.
// At exit, the first numEigen locations contain the eigenvalues requested.
//
// startingEV (integer) = Number of eigenmodes already stored in Q
// A linear combination of these vectors is made to define the starting
// vector, placed in resid.
//
// Return information on status of computation
//
// info >= 0 >> Number of converged eigenpairs at the end of computation
//
// // Failure due to input arguments
//
// info = - 1 >> The stiffness matrix K has not been specified.
// info = - 2 >> The maps for the matrix K and the matrix M differ.
// info = - 3 >> The maps for the matrix K and the preconditioner P differ.
// info = - 4 >> The maps for the vectors and the matrix K differ.
// info = - 5 >> Q is too small for the number of eigenvalues requested.
// info = - 6 >> Q is too small for the computation parameters.
//
// info = - 8 >> numEigen must be smaller than the dimension of the matrix.
//
// info = - 30 >> MEMORY
//
// See ARPACK documentation for the meaning of INFO
if (numEigen <= startingEV) {
return numEigen;
}
int info = myVerify.inputArguments(numEigen, K, M, 0, Q, minimumSpaceDimension(numEigen));
if (info < 0)
return info;
int myPid = MyComm.MyPID();
int localSize = Q.MyLength();
int NCV = Q.NumVectors();
int knownEV = 0;
if (NCV > Q.GlobalLength()) {
if (numEigen >= Q.GlobalLength()) {
cerr << endl;
cerr << " !! The number of requested eigenvalues must be smaller than the dimension";
cerr << " of the matrix !!\n";
cerr << endl;
return -8;
}
NCV = Q.GlobalLength();
}
int localVerbose = verbose*(myPid == 0);
// Define data for ARPACK
highMem = (highMem > currentSize()) ? highMem : currentSize();
int ido = 0;
int lwI = 22 + NCV;
int *wI = new (nothrow) int[lwI];
if (wI == 0) {
return -30;
}
memRequested += sizeof(int)*lwI/(1024.0*1024.0);
int *iparam = wI;
int *ipntr = wI + 11;
int *select = wI + 22;
int lworkl = NCV*(NCV+8);
int lwD = lworkl + 4*localSize;
double *wD = new (nothrow) double[lwD];
if (wD == 0) {
delete[] wI;
return -30;
}
memRequested += sizeof(double)*(4*localSize+lworkl)/(1024.0*1024.0);
double *pointer = wD;
double *workl = pointer;
pointer = pointer + lworkl;
double *resid = pointer;
pointer = pointer + localSize;
double *workd = pointer;
double *v = Q.Values();
highMem = (highMem > currentSize()) ? highMem : currentSize();
double sigma = 0.0;
if (startingEV > 0) {
// Define the initial starting vector
memset(resid, 0, localSize*sizeof(double));
for (int jj = 0; jj < startingEV; ++jj)
for (int ii = 0; ii < localSize; ++ii)
resid[ii] += v[ii + jj*localSize];
info = 1;
}
iparam[1-1] = 1;
iparam[3-1] = maxIterEigenSolve;
iparam[7-1] = 3;
// The fourth parameter forces to use the convergence test provided by ARPACK.
// This requires a customization of ARPACK (provided by R. Lehoucq).
iparam[4-1] = 0;
Epetra_Vector v1(View, Q.Map(), workd);
Epetra_Vector v2(View, Q.Map(), workd + localSize);
Epetra_Vector v3(View, Q.Map(), workd + 2*localSize);
double *vTmp = new (nothrow) double[localSize];
if (vTmp == 0) {
delete[] wI;
delete[] wD;
return -30;
}
memRequested += sizeof(double)*localSize/(1024.0*1024.0);
highMem = (highMem > currentSize()) ? highMem : currentSize();
if (localVerbose > 0) {
cout << endl;
cout << " *|* Problem: ";
if (M)
cout << "K*Q = M*Q D ";
else
cout << "K*Q = Q D ";
cout << endl;
cout << " *|* Algorithm = ARPACK (mode 3)" << endl;
cout << " *|* Number of requested eigenvalues = " << numEigen << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
cout << " *|* Tolerance for convergence = " << tolEigenSolve << endl;
if (startingEV > 0)
cout << " *|* User-defined starting vector (Combination of " << startingEV << " vectors)\n";
cout << "\n -- Start iterations -- \n";
}
#ifdef EPETRA_MPI
Epetra_MpiComm *MPIComm = dynamic_cast<Epetra_MpiComm *>(const_cast<Epetra_Comm*>(&MyComm));
#endif
timeOuterLoop -= MyWatch.WallTime();
while (ido != 99) {
highMem = (highMem > currentSize()) ? highMem : currentSize();
#ifdef EPETRA_MPI
if (MPIComm)
callFortran.PSAUPD(MPIComm->Comm(), &ido, 'G', localSize, which, numEigen, tolEigenSolve,
resid, NCV, v, localSize, iparam, ipntr, workd, workl, lworkl, &info, localVerbose);
else
callFortran.SAUPD(&ido, 'G', localSize, which, numEigen, tolEigenSolve, resid, NCV, v,
localSize, iparam, ipntr, workd, workl, lworkl, &info, localVerbose);
#else
callFortran.SAUPD(&ido, 'G', localSize, which, numEigen, tolEigenSolve, resid, NCV, v,
localSize, iparam, ipntr, workd, workl, lworkl, &info, localVerbose);
#endif
if (ido == -1) {
// Apply the mass matrix
v3.ResetView(workd + ipntr[0] - 1);
v1.ResetView(vTmp);
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(v3, v1);
else
memcpy(v1.Values(), v3.Values(), localSize*sizeof(double));
timeMassOp += MyWatch.WallTime();
massOp += 1;
// Solve the stiffness problem
v2.ResetView(workd + ipntr[1] - 1);
timeStifOp -= MyWatch.WallTime();
K->ApplyInverse(v1, v2);
timeStifOp += MyWatch.WallTime();
stifOp += 1;
continue;
} // if (ido == -1)
if (ido == 1) {
// Solve the stiffness problem
v1.ResetView(workd + ipntr[2] - 1);
v2.ResetView(workd + ipntr[1] - 1);
timeStifOp -= MyWatch.WallTime();
K->ApplyInverse(v1, v2);
timeStifOp += MyWatch.WallTime();
stifOp += 1;
continue;
} // if (ido == 1)
if (ido == 2) {
// Apply the mass matrix
v1.ResetView(workd + ipntr[0] - 1);
v2.ResetView(workd + ipntr[1] - 1);
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(v1, v2);
else
memcpy(v2.Values(), v1.Values(), localSize*sizeof(double));
timeMassOp += MyWatch.WallTime();
massOp += 1;
continue;
} // if (ido == 2)
} // while (ido != 99)
timeOuterLoop += MyWatch.WallTime();
highMem = (highMem > currentSize()) ? highMem : currentSize();
if (info < 0) {
if (myPid == 0) {
cerr << endl;
cerr << " Error with DSAUPD, info = " << info << endl;
cerr << endl;
}
}
else {
// Compute the eigenvectors
timePostProce -= MyWatch.WallTime();
#ifdef EPETRA_MPI
if (MPIComm)
callFortran.PSEUPD(MPIComm->Comm(), 1, 'A', select, lambda, v, localSize, sigma, 'G',
localSize, which, numEigen, tolEigenSolve, resid, NCV, v, localSize, iparam, ipntr,
workd, workl, lworkl, &info);
else
callFortran.SEUPD(1, 'A', select, lambda, v, localSize, sigma, 'G', localSize, which,
numEigen, tolEigenSolve, resid, NCV, v, localSize, iparam, ipntr, workd, workl,
lworkl, &info);
#else
callFortran.SEUPD(1, 'A', select, lambda, v, localSize, sigma, 'G', localSize, which,
numEigen, tolEigenSolve, resid, NCV, v, localSize, iparam, ipntr, workd, workl,
lworkl, &info);
#endif
timePostProce += MyWatch.WallTime();
highMem = (highMem > currentSize()) ? highMem : currentSize();
// Treat the error
if (info != 0) {
if (myPid == 0) {
cerr << endl;
cerr << " Error with DSEUPD, info = " << info << endl;
cerr << endl;
}
}
} // if (info < 0)
if (info == 0) {
outerIter = iparam[3-1];
knownEV = iparam[5-1];
orthoOp = iparam[11-1];
}
delete[] wI;
delete[] wD;
delete[] vTmp;
return (info == 0) ? knownEV : info;
}
int BlockDACG::reSolve(int numEigen, Epetra_MultiVector &Q, double *lambda, int startingEV) {
// Computes the smallest eigenvalues and the corresponding eigenvectors
// of the generalized eigenvalue problem
//
// K X = M X Lambda
//
// using a Block Deflation Accelerated Conjugate Gradient algorithm.
//
// Note that if M is not specified, then K X = X Lambda is solved.
//
// Ref: P. Arbenz & R. Lehoucq, "A comparison of algorithms for modal analysis in the
// absence of a sparse direct method", SNL, Technical Report SAND2003-1028J
// With the notations of this report, the coefficient beta is defined as
// diag( H^T_{k} G_{k} ) / diag( H^T_{k-1} G_{k-1} )
//
// Input variables:
//
// numEigen (integer) = Number of eigenmodes requested
//
// Q (Epetra_MultiVector) = Converged eigenvectors
// The number of columns of Q must be equal to numEigen + blockSize.
// The rows of Q are distributed across processors.
// At exit, the first numEigen columns contain the eigenvectors requested.
//
// lambda (array of doubles) = Converged eigenvalues
// At input, it must be of size numEigen + blockSize.
// At exit, the first numEigen locations contain the eigenvalues requested.
//
// startingEV (integer) = Number of existing converged eigenmodes
//
// Return information on status of computation
//
// info >= 0 >> Number of converged eigenpairs at the end of computation
//
// // Failure due to input arguments
//
// info = - 1 >> The stiffness matrix K has not been specified.
// info = - 2 >> The maps for the matrix K and the matrix M differ.
// info = - 3 >> The maps for the matrix K and the preconditioner P differ.
// info = - 4 >> The maps for the vectors and the matrix K differ.
// info = - 5 >> Q is too small for the number of eigenvalues requested.
// info = - 6 >> Q is too small for the computation parameters.
//
// info = - 10 >> Failure during the mass orthonormalization
//
// info = - 20 >> Error in LAPACK during the local eigensolve
//
// info = - 30 >> MEMORY
//
// Check the input parameters
if (numEigen <= startingEV) {
return startingEV;
}
int info = myVerify.inputArguments(numEigen, K, M, Prec, Q, numEigen + blockSize);
if (info < 0)
return info;
int myPid = MyComm.MyPID();
// Get the weight for approximating the M-inverse norm
Epetra_Vector *vectWeight = 0;
if (normWeight) {
vectWeight = new Epetra_Vector(View, Q.Map(), normWeight);
}
int knownEV = startingEV;
int localVerbose = verbose*(myPid==0);
// Define local block vectors
//
// MX = Working vectors (storing M*X if M is specified, else pointing to X)
// KX = Working vectors (storing K*X)
//
// R = Residuals
//
// H = Preconditioned residuals
//
// P = Search directions
// MP = Working vectors (storing M*P if M is specified, else pointing to P)
// KP = Working vectors (storing K*P)
int xr = Q.MyLength();
Epetra_MultiVector X(View, Q, numEigen, blockSize);
X.Random();
int tmp;
tmp = (M == 0) ? 5*blockSize*xr : 7*blockSize*xr;
double *work1 = new (nothrow) double[tmp];
if (work1 == 0) {
if (vectWeight)
delete vectWeight;
info = -30;
return info;
}
memRequested += sizeof(double)*tmp/(1024.0*1024.0);
highMem = (highMem > currentSize()) ? highMem : currentSize();
double *tmpD = work1;
Epetra_MultiVector KX(View, Q.Map(), tmpD, xr, blockSize);
tmpD = tmpD + xr*blockSize;
Epetra_MultiVector MX(View, Q.Map(), (M) ? tmpD : X.Values(), xr, blockSize);
tmpD = (M) ? tmpD + xr*blockSize : tmpD;
Epetra_MultiVector R(View, Q.Map(), tmpD, xr, blockSize);
tmpD = tmpD + xr*blockSize;
Epetra_MultiVector H(View, Q.Map(), tmpD, xr, blockSize);
tmpD = tmpD + xr*blockSize;
Epetra_MultiVector P(View, Q.Map(), tmpD, xr, blockSize);
tmpD = tmpD + xr*blockSize;
Epetra_MultiVector KP(View, Q.Map(), tmpD, xr, blockSize);
tmpD = tmpD + xr*blockSize;
Epetra_MultiVector MP(View, Q.Map(), (M) ? tmpD : P.Values(), xr, blockSize);
// Define arrays
//
// theta = Store the local eigenvalues (size: 2*blockSize)
// normR = Store the norm of residuals (size: blockSize)
//
// oldHtR = Store the previous H_i^T*R_i (size: blockSize)
// currentHtR = Store the current H_i^T*R_i (size: blockSize)
//
// MM = Local mass matrix (size: 2*blockSize x 2*blockSize)
// KK = Local stiffness matrix (size: 2*blockSize x 2*blockSize)
//
// S = Local eigenvectors (size: 2*blockSize x 2*blockSize)
int lwork2;
lwork2 = 5*blockSize + 12*blockSize*blockSize;
double *work2 = new (nothrow) double[lwork2];
if (work2 == 0) {
if (vectWeight)
delete vectWeight;
delete[] work1;
info = -30;
return info;
}
highMem = (highMem > currentSize()) ? highMem : currentSize();
tmpD = work2;
double *theta = tmpD;
tmpD = tmpD + 2*blockSize;
double *normR = tmpD;
tmpD = tmpD + blockSize;
double *oldHtR = tmpD;
tmpD = tmpD + blockSize;
double *currentHtR = tmpD;
tmpD = tmpD + blockSize;
memset(currentHtR, 0, blockSize*sizeof(double));
double *MM = tmpD;
tmpD = tmpD + 4*blockSize*blockSize;
double *KK = tmpD;
tmpD = tmpD + 4*blockSize*blockSize;
double *S = tmpD;
memRequested += sizeof(double)*lwork2/(1024.0*1024.0);
// Define an array to store the residuals history
if (localVerbose > 2) {
resHistory = new (nothrow) double[maxIterEigenSolve*blockSize];
if (resHistory == 0) {
if (vectWeight)
delete vectWeight;
delete[] work1;
delete[] work2;
info = -30;
return info;
}
historyCount = 0;
}
// Miscellaneous definitions
bool reStart = false;
numRestart = 0;
int localSize;
int twoBlocks = 2*blockSize;
int nFound = blockSize;
int i, j;
if (localVerbose > 0) {
cout << endl;
cout << " *|* Problem: ";
if (M)
cout << "K*Q = M*Q D ";
else
cout << "K*Q = Q D ";
if (Prec)
cout << " with preconditioner";
cout << endl;
cout << " *|* Algorithm = DACG (block version)" << endl;
cout << " *|* Size of blocks = " << blockSize << endl;
cout << " *|* Number of requested eigenvalues = " << numEigen << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
cout << " *|* Tolerance for convergence = " << tolEigenSolve << endl;
cout << " *|* Norm used for convergence: ";
if (normWeight)
cout << "weighted L2-norm with user-provided weights" << endl;
else
cout << "L^2-norm" << endl;
if (startingEV > 0)
cout << " *|* Input converged eigenvectors = " << startingEV << endl;
cout << "\n -- Start iterations -- \n";
}
timeOuterLoop -= MyWatch.WallTime();
for (outerIter = 1; outerIter <= maxIterEigenSolve; ++outerIter) {
highMem = (highMem > currentSize()) ? highMem : currentSize();
if ((outerIter == 1) || (reStart == true)) {
reStart = false;
localSize = blockSize;
if (nFound > 0) {
Epetra_MultiVector X2(View, X, blockSize-nFound, nFound);
Epetra_MultiVector MX2(View, MX, blockSize-nFound, nFound);
Epetra_MultiVector KX2(View, KX, blockSize-nFound, nFound);
// Apply the mass matrix to X
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(X2, MX2);
timeMassOp += MyWatch.WallTime();
massOp += nFound;
if (knownEV > 0) {
// Orthonormalize X against the known eigenvectors with Gram-Schmidt
// Note: Use R as a temporary work space
Epetra_MultiVector copyQ(View, Q, 0, knownEV);
timeOrtho -= MyWatch.WallTime();
info = modalTool.massOrthonormalize(X, MX, M, copyQ, nFound, 0, R.Values());
timeOrtho += MyWatch.WallTime();
// Exit the code if the orthogonalization did not succeed
if (info < 0) {
info = -10;
delete[] work1;
delete[] work2;
if (vectWeight)
delete vectWeight;
return info;
}
}
// Apply the stiffness matrix to X
timeStifOp -= MyWatch.WallTime();
K->Apply(X2, KX2);
timeStifOp += MyWatch.WallTime();
stifOp += nFound;
} // if (nFound > 0)
} // if ((outerIter == 1) || (reStart == true))
else {
// Apply the preconditioner on the residuals
if (Prec != 0) {
timePrecOp -= MyWatch.WallTime();
Prec->ApplyInverse(R, H);
timePrecOp += MyWatch.WallTime();
precOp += blockSize;
}
else {
memcpy(H.Values(), R.Values(), xr*blockSize*sizeof(double));
}
// Compute the product H^T*R
timeSearchP -= MyWatch.WallTime();
memcpy(oldHtR, currentHtR, blockSize*sizeof(double));
H.Dot(R, currentHtR);
// Define the new search directions
if (localSize == blockSize) {
P.Scale(-1.0, H);
localSize = twoBlocks;
} // if (localSize == blockSize)
else {
bool hasZeroDot = false;
for (j = 0; j < blockSize; ++j) {
if (oldHtR[j] == 0.0) {
hasZeroDot = true;
break;
}
callBLAS.SCAL(xr, currentHtR[j]/oldHtR[j], P.Values() + j*xr);
}
if (hasZeroDot == true) {
// Restart the computation when there is a null dot product
if (localVerbose > 0) {
cout << endl;
cout << " !! Null dot product -- Restart the search space !!\n";
cout << endl;
}
if (blockSize == 1) {
X.Random();
nFound = blockSize;
}
else {
Epetra_MultiVector Xinit(View, X, j, blockSize-j);
Xinit.Random();
nFound = blockSize - j;
} // if (blockSize == 1)
reStart = true;
numRestart += 1;
info = 0;
continue;
}
callBLAS.AXPY(xr*blockSize, -1.0, H.Values(), P.Values());
} // if (localSize == blockSize)
timeSearchP += MyWatch.WallTime();
// Apply the mass matrix on P
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(P, MP);
timeMassOp += MyWatch.WallTime();
massOp += blockSize;
if (knownEV > 0) {
// Orthogonalize P against the known eigenvectors
// Note: Use R as a temporary work space
Epetra_MultiVector copyQ(View, Q, 0, knownEV);
timeOrtho -= MyWatch.WallTime();
modalTool.massOrthonormalize(P, MP, M, copyQ, blockSize, 1, R.Values());
timeOrtho += MyWatch.WallTime();
}
// Apply the stiffness matrix to P
timeStifOp -= MyWatch.WallTime();
K->Apply(P, KP);
timeStifOp += MyWatch.WallTime();
stifOp += blockSize;
} // if ((outerIter == 1) || (reStart == true))
// Form "local" mass and stiffness matrices
// Note: Use S as a temporary workspace
timeLocalProj -= MyWatch.WallTime();
modalTool.localProjection(blockSize, blockSize, xr, X.Values(), xr, KX.Values(), xr,
KK, localSize, S);
modalTool.localProjection(blockSize, blockSize, xr, X.Values(), xr, MX.Values(), xr,
MM, localSize, S);
if (localSize > blockSize) {
modalTool.localProjection(blockSize, blockSize, xr, X.Values(), xr, KP.Values(), xr,
KK + blockSize*localSize, localSize, S);
modalTool.localProjection(blockSize, blockSize, xr, P.Values(), xr, KP.Values(), xr,
KK + blockSize*localSize + blockSize, localSize, S);
modalTool.localProjection(blockSize, blockSize, xr, X.Values(), xr, MP.Values(), xr,
MM + blockSize*localSize, localSize, S);
modalTool.localProjection(blockSize, blockSize, xr, P.Values(), xr, MP.Values(), xr,
MM + blockSize*localSize + blockSize, localSize, S);
} // if (localSize > blockSize)
timeLocalProj += MyWatch.WallTime();
// Perform a spectral decomposition
timeLocalSolve -= MyWatch.WallTime();
int nevLocal = localSize;
info = modalTool.directSolver(localSize, KK, localSize, MM, localSize, nevLocal,
S, localSize, theta, localVerbose,
(blockSize == 1) ? 1: 0);
timeLocalSolve += MyWatch.WallTime();
if (info < 0) {
// Stop when spectral decomposition has a critical failure
break;
}
// Check for restarting
if ((theta[0] < 0.0) || (nevLocal < blockSize)) {
if (localVerbose > 0) {
cout << " Iteration " << outerIter;
cout << "- Failure for spectral decomposition - RESTART with new random search\n";
}
if (blockSize == 1) {
X.Random();
nFound = blockSize;
}
else {
Epetra_MultiVector Xinit(View, X, 1, blockSize-1);
Xinit.Random();
nFound = blockSize - 1;
} // if (blockSize == 1)
reStart = true;
numRestart += 1;
info = 0;
continue;
} // if ((theta[0] < 0.0) || (nevLocal < blockSize))
if ((localSize == twoBlocks) && (nevLocal == blockSize)) {
for (j = 0; j < nevLocal; ++j)
memcpy(S + j*blockSize, S + j*twoBlocks, blockSize*sizeof(double));
localSize = blockSize;
}
// Check the direction of eigenvectors
// Note: This sign check is important for convergence
for (j = 0; j < nevLocal; ++j) {
double coeff = S[j + j*localSize];
if (coeff < 0.0)
callBLAS.SCAL(localSize, -1.0, S + j*localSize);
}
// Compute the residuals
timeResidual -= MyWatch.WallTime();
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, KX.Values(), xr,
S, localSize, 0.0, R.Values(), xr);
if (localSize == twoBlocks) {
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, KP.Values(), xr,
S + blockSize, localSize, 1.0, R.Values(), xr);
}
for (j = 0; j < blockSize; ++j)
callBLAS.SCAL(localSize, theta[j], S + j*localSize);
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, -1.0, MX.Values(), xr,
S, localSize, 1.0, R.Values(), xr);
if (localSize == twoBlocks) {
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, -1.0, MP.Values(), xr,
S + blockSize, localSize, 1.0, R.Values(), xr);
}
for (j = 0; j < blockSize; ++j)
callBLAS.SCAL(localSize, 1.0/theta[j], S + j*localSize);
timeResidual += MyWatch.WallTime();
// Compute the norms of the residuals
timeNorm -= MyWatch.WallTime();
if (vectWeight)
R.NormWeighted(*vectWeight, normR);
else
R.Norm2(normR);
// Scale the norms of residuals with the eigenvalues
// Count the converged eigenvectors
nFound = 0;
for (j = 0; j < blockSize; ++j) {
normR[j] = (theta[j] == 0.0) ? normR[j] : normR[j]/theta[j];
if (normR[j] < tolEigenSolve)
nFound += 1;
}
timeNorm += MyWatch.WallTime();
// Store the residual history
if (localVerbose > 2) {
memcpy(resHistory + historyCount*blockSize, normR, blockSize*sizeof(double));
historyCount += 1;
}
// Print information on current iteration
if (localVerbose > 0) {
cout << " Iteration " << outerIter << " - Number of converged eigenvectors ";
cout << knownEV + nFound << endl;
}
if (localVerbose > 1) {
cout << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
for (i=0; i<blockSize; ++i) {
cout << " Iteration " << outerIter << " - Scaled Norm of Residual " << i;
cout << " = " << normR[i] << endl;
}
cout << endl;
cout.precision(2);
for (i=0; i<blockSize; ++i) {
cout << " Iteration " << outerIter << " - Ritz eigenvalue " << i;
cout.setf((fabs(theta[i]) < 0.01) ? ios::scientific : ios::fixed, ios::floatfield);
cout << " = " << theta[i] << endl;
}
cout << endl;
}
if (nFound == 0) {
// Update the spaces
// Note: Use H as a temporary work space
timeLocalUpdate -= MyWatch.WallTime();
memcpy(H.Values(), X.Values(), xr*blockSize*sizeof(double));
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, H.Values(), xr, S, localSize,
0.0, X.Values(), xr);
memcpy(H.Values(), KX.Values(), xr*blockSize*sizeof(double));
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, H.Values(), xr, S, localSize,
0.0, KX.Values(), xr);
if (M) {
memcpy(H.Values(), MX.Values(), xr*blockSize*sizeof(double));
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, H.Values(), xr, S, localSize,
0.0, MX.Values(), xr);
}
if (localSize == twoBlocks) {
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, P.Values(), xr,
S + blockSize, localSize, 1.0, X.Values(), xr);
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, KP.Values(), xr,
S + blockSize, localSize, 1.0, KX.Values(), xr);
if (M) {
callBLAS.GEMM('N', 'N', xr, blockSize, blockSize, 1.0, MP.Values(), xr,
S + blockSize, localSize, 1.0, MX.Values(), xr);
}
} // if (localSize == twoBlocks)
timeLocalUpdate += MyWatch.WallTime();
// When required, monitor some orthogonalities
if (verbose > 2) {
if (knownEV == 0) {
accuracyCheck(&X, &MX, &R, 0, (localSize>blockSize) ? &P : 0);
}
else {
Epetra_MultiVector copyQ(View, Q, 0, knownEV);
accuracyCheck(&X, &MX, &R, ©Q, (localSize>blockSize) ? &P : 0);
}
} // if (verbose > 2)
continue;
} // if (nFound == 0)
// Order the Ritz eigenvectors by putting the converged vectors at the beginning
int firstIndex = blockSize;
for (j = 0; j < blockSize; ++j) {
if (normR[j] >= tolEigenSolve) {
firstIndex = j;
break;
}
} // for (j = 0; j < blockSize; ++j)
while (firstIndex < nFound) {
for (j = firstIndex; j < blockSize; ++j) {
if (normR[j] < tolEigenSolve) {
// Swap the j-th and firstIndex-th position
callFortran.SWAP(localSize, S + j*localSize, 1, S + firstIndex*localSize, 1);
callFortran.SWAP(1, theta + j, 1, theta + firstIndex, 1);
callFortran.SWAP(1, normR + j, 1, normR + firstIndex, 1);
break;
}
} // for (j = firstIndex; j < blockSize; ++j)
for (j = 0; j < blockSize; ++j) {
if (normR[j] >= tolEigenSolve) {
firstIndex = j;
break;
}
} // for (j = 0; j < blockSize; ++j)
} // while (firstIndex < nFound)
// Copy the converged eigenvalues
memcpy(lambda + knownEV, theta, nFound*sizeof(double));
// Convergence test
if (knownEV + nFound >= numEigen) {
callBLAS.GEMM('N', 'N', xr, nFound, blockSize, 1.0, X.Values(), xr,
S, localSize, 0.0, R.Values(), xr);
if (localSize > blockSize) {
callBLAS.GEMM('N', 'N', xr, nFound, blockSize, 1.0, P.Values(), xr,
S + blockSize, localSize, 1.0, R.Values(), xr);
}
memcpy(Q.Values() + knownEV*xr, R.Values(), nFound*xr*sizeof(double));
knownEV += nFound;
if (localVerbose == 1) {
cout << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
for (i=0; i<blockSize; ++i) {
cout << " Iteration " << outerIter << " - Scaled Norm of Residual " << i;
cout << " = " << normR[i] << endl;
}
cout << endl;
}
break;
}
// Store the converged eigenvalues and eigenvectors
callBLAS.GEMM('N', 'N', xr, nFound, blockSize, 1.0, X.Values(), xr,
S, localSize, 0.0, Q.Values() + knownEV*xr, xr);
if (localSize == twoBlocks) {
callBLAS.GEMM('N', 'N', xr, nFound, blockSize, 1.0, P.Values(), xr,
S + blockSize, localSize, 1.0, Q.Values() + knownEV*xr, xr);
}
knownEV += nFound;
// Define the restarting vectors
timeRestart -= MyWatch.WallTime();
int leftOver = (nevLocal < blockSize + nFound) ? nevLocal - nFound : blockSize;
double *Snew = S + nFound*localSize;
memcpy(H.Values(), X.Values(), blockSize*xr*sizeof(double));
callBLAS.GEMM('N', 'N', xr, leftOver, blockSize, 1.0, H.Values(), xr,
Snew, localSize, 0.0, X.Values(), xr);
memcpy(H.Values(), KX.Values(), blockSize*xr*sizeof(double));
callBLAS.GEMM('N', 'N', xr, leftOver, blockSize, 1.0, H.Values(), xr,
Snew, localSize, 0.0, KX.Values(), xr);
if (M) {
memcpy(H.Values(), MX.Values(), blockSize*xr*sizeof(double));
callBLAS.GEMM('N', 'N', xr, leftOver, blockSize, 1.0, H.Values(), xr,
Snew, localSize, 0.0, MX.Values(), xr);
}
if (localSize == twoBlocks) {
callBLAS.GEMM('N', 'N', xr, leftOver, blockSize, 1.0, P.Values(), xr,
Snew+blockSize, localSize, 1.0, X.Values(), xr);
callBLAS.GEMM('N', 'N', xr, leftOver, blockSize, 1.0, KP.Values(), xr,
Snew+blockSize, localSize, 1.0, KX.Values(), xr);
if (M) {
callBLAS.GEMM('N', 'N', xr, leftOver, blockSize, 1.0, MP.Values(), xr,
Snew+blockSize, localSize, 1.0, MX.Values(), xr);
}
} // if (localSize == twoBlocks)
if (nevLocal < blockSize + nFound) {
// Put new random vectors at the end of the block
Epetra_MultiVector Xtmp(View, X, leftOver, blockSize - leftOver);
Xtmp.Random();
}
else {
nFound = 0;
} // if (nevLocal < blockSize + nFound)
reStart = true;
timeRestart += MyWatch.WallTime();
} // for (outerIter = 1; outerIter <= maxIterEigenSolve; ++outerIter)
timeOuterLoop += MyWatch.WallTime();
highMem = (highMem > currentSize()) ? highMem : currentSize();
// Clean memory
delete[] work1;
delete[] work2;
if (vectWeight)
delete vectWeight;
// Sort the eigenpairs
timePostProce -= MyWatch.WallTime();
if ((info == 0) && (knownEV > 0)) {
mySort.sortScalars_Vectors(knownEV, lambda, Q.Values(), Q.MyLength());
}
timePostProce += MyWatch.WallTime();
return (info == 0) ? knownEV : info;
}
int Davidson::reSolve(int numEigen, Epetra_MultiVector &Q, double *lambda, int startingEV) {
// Computes the smallest eigenvalues and the corresponding eigenvectors
// of the generalized eigenvalue problem
//
// K X = M X Lambda
//
// using a generalized Davidson algorithm
//
// Note that if M is not specified, then K X = X Lambda is solved.
//
// Input variables:
//
// numEigen (integer) = Number of eigenmodes requested
//
// Q (Epetra_MultiVector) = Converged eigenvectors
// The number of columns of Q must be at least numEigen + blockSize.
// The rows of Q are distributed across processors.
// At exit, the first numEigen columns contain the eigenvectors requested.
//
// lambda (array of doubles) = Converged eigenvalues
// At input, it must be of size numEigen + blockSize.
// At exit, the first numEigen locations contain the eigenvalues requested.
//
// startingEV (integer) = Number of existing converged eigenvectors
// We assume that the user has check the eigenvectors and
// their M-orthonormality.
//
// Return information on status of computation
//
// info >= 0 >> Number of converged eigenpairs at the end of computation
//
// // Failure due to input arguments
//
// info = - 1 >> The stiffness matrix K has not been specified.
// info = - 2 >> The maps for the matrix K and the matrix M differ.
// info = - 3 >> The maps for the matrix K and the preconditioner P differ.
// info = - 4 >> The maps for the vectors and the matrix K differ.
// info = - 5 >> Q is too small for the number of eigenvalues requested.
// info = - 6 >> Q is too small for the computation parameters.
//
// info = - 8 >> The number of blocks is too small for the number of eigenvalues.
//
// info = - 10 >> Failure during the mass orthonormalization
//
// info = - 30 >> MEMORY
//
// Check the input parameters
if (numEigen <= startingEV) {
return startingEV;
}
int info = myVerify.inputArguments(numEigen, K, M, Prec, Q, minimumSpaceDimension(numEigen));
if (info < 0)
return info;
int myPid = MyComm.MyPID();
if (numBlock*blockSize < numEigen) {
if (myPid == 0) {
cerr << endl;
cerr << " !!! The space dimension (# of blocks x size of blocks) must be greater than ";
cerr << " the number of eigenvalues !!!\n";
cerr << " Number of blocks = " << numBlock << endl;
cerr << " Size of blocks = " << blockSize << endl;
cerr << " Number of eigenvalues = " << numEigen << endl;
cerr << endl;
}
return -8;
}
// Get the weight for approximating the M-inverse norm
Epetra_Vector *vectWeight = 0;
if (normWeight) {
vectWeight = new Epetra_Vector(View, Q.Map(), normWeight);
}
int knownEV = startingEV;
int localVerbose = verbose*(myPid==0);
// Define local block vectors
//
// MX = Working vectors (storing M*X if M is specified, else pointing to X)
// KX = Working vectors (storing K*X)
//
// R = Residuals
int xr = Q.MyLength();
int dimSearch = blockSize*numBlock;
Epetra_MultiVector X(View, Q, 0, dimSearch + blockSize);
if (knownEV > 0) {
Epetra_MultiVector copyX(View, Q, knownEV, blockSize);
copyX.Random();
}
else {
X.Random();
}
int tmp;
tmp = (M == 0) ? 2*blockSize*xr : 3*blockSize*xr;
double *work1 = new (nothrow) double[tmp];
if (work1 == 0) {
if (vectWeight)
delete vectWeight;
info = -30;
return info;
}
memRequested += sizeof(double)*tmp/(1024.0*1024.0);
highMem = (highMem > currentSize()) ? highMem : currentSize();
double *tmpD = work1;
Epetra_MultiVector KX(View, Q.Map(), tmpD, xr, blockSize);
tmpD = tmpD + xr*blockSize;
Epetra_MultiVector MX(View, Q.Map(), (M) ? tmpD : X.Values(), xr, blockSize);
tmpD = (M) ? tmpD + xr*blockSize : tmpD;
Epetra_MultiVector R(View, Q.Map(), tmpD, xr, blockSize);
// Define arrays
//
// theta = Store the local eigenvalues (size: dimSearch)
// normR = Store the norm of residuals (size: blockSize)
//
// KK = Local stiffness matrix (size: dimSearch x dimSearch)
//
// S = Local eigenvectors (size: dimSearch x dimSearch)
//
// tmpKK = Local workspace (size: blockSize x blockSize)
int lwork2 = blockSize + dimSearch + 2*dimSearch*dimSearch + blockSize*blockSize;
double *work2 = new (nothrow) double[lwork2];
if (work2 == 0) {
if (vectWeight)
delete vectWeight;
delete[] work1;
info = -30;
return info;
}
memRequested += sizeof(double)*lwork2/(1024.0*1024.0);
highMem = (highMem > currentSize()) ? highMem : currentSize();
tmpD = work2;
double *theta = tmpD;
tmpD = tmpD + dimSearch;
double *normR = tmpD;
tmpD = tmpD + blockSize;
double *KK = tmpD;
tmpD = tmpD + dimSearch*dimSearch;
memset(KK, 0, dimSearch*dimSearch*sizeof(double));
double *S = tmpD;
tmpD = tmpD + dimSearch*dimSearch;
double *tmpKK = tmpD;
// Define an array to store the residuals history
if (localVerbose > 2) {
resHistory = new (nothrow) double[maxIterEigenSolve*blockSize];
spaceSizeHistory = new (nothrow) int[maxIterEigenSolve];
if ((resHistory == 0) || (spaceSizeHistory == 0)) {
if (vectWeight)
delete vectWeight;
delete[] work1;
delete[] work2;
info = -30;
return info;
}
historyCount = 0;
}
// Miscellaneous definitions
bool reStart = false;
numRestart = 0;
bool criticalExit = false;
int bStart = 0;
int offSet = 0;
numBlock = (dimSearch/blockSize) - (knownEV/blockSize);
int nFound = blockSize;
int i, j;
if (localVerbose > 0) {
cout << endl;
cout << " *|* Problem: ";
if (M)
cout << "K*Q = M*Q D ";
else
cout << "K*Q = Q D ";
if (Prec)
cout << " with preconditioner";
cout << endl;
cout << " *|* Algorithm = Davidson algorithm (block version)" << endl;
cout << " *|* Size of blocks = " << blockSize << endl;
cout << " *|* Largest size of search space = " << numBlock*blockSize << endl;
cout << " *|* Number of requested eigenvalues = " << numEigen << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
cout << " *|* Tolerance for convergence = " << tolEigenSolve << endl;
cout << " *|* Norm used for convergence: ";
if (vectWeight)
cout << "weighted L2-norm with user-provided weights" << endl;
else
cout << "L^2-norm" << endl;
if (startingEV > 0)
cout << " *|* Input converged eigenvectors = " << startingEV << endl;
cout << "\n -- Start iterations -- \n";
}
int maxBlock = (dimSearch/blockSize) - (knownEV/blockSize);
timeOuterLoop -= MyWatch.WallTime();
outerIter = 0;
while (outerIter <= maxIterEigenSolve) {
highMem = (highMem > currentSize()) ? highMem : currentSize();
int nb;
for (nb = bStart; nb < maxBlock; ++nb) {
outerIter += 1;
if (outerIter > maxIterEigenSolve)
break;
int localSize = nb*blockSize;
Epetra_MultiVector Xcurrent(View, X, localSize + knownEV, blockSize);
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(Xcurrent, MX);
timeMassOp += MyWatch.WallTime();
massOp += blockSize;
// Orthonormalize X against the known eigenvectors and the previous vectors
// Note: Use R as a temporary work space
timeOrtho -= MyWatch.WallTime();
if (nb == bStart) {
if (nFound > 0) {
if (knownEV == 0) {
info = modalTool.massOrthonormalize(Xcurrent, MX, M, Q, nFound, 2, R.Values());
}
else {
Epetra_MultiVector copyQ(View, X, 0, knownEV + localSize);
info = modalTool.massOrthonormalize(Xcurrent, MX, M, copyQ, nFound, 0, R.Values());
}
}
nFound = 0;
}
else {
Epetra_MultiVector copyQ(View, X, 0, knownEV + localSize);
info = modalTool.massOrthonormalize(Xcurrent, MX, M, copyQ, blockSize, 0, R.Values());
}
timeOrtho += MyWatch.WallTime();
// Exit the code when the number of vectors exceeds the space dimension
if (info < 0) {
delete[] work1;
delete[] work2;
if (vectWeight)
delete vectWeight;
return -10;
}
timeStifOp -= MyWatch.WallTime();
K->Apply(Xcurrent, KX);
timeStifOp += MyWatch.WallTime();
stifOp += blockSize;
// Check the orthogonality properties of X
if (verbose > 2) {
if (knownEV + localSize == 0)
accuracyCheck(&Xcurrent, &MX, 0);
else {
Epetra_MultiVector copyQ(View, X, 0, knownEV + localSize);
accuracyCheck(&Xcurrent, &MX, ©Q);
}
if (localVerbose > 0)
cout << endl;
} // if (verbose > 2)
// Define the local stiffness matrix
// Note: S is used as a workspace
timeLocalProj -= MyWatch.WallTime();
for (j = 0; j <= nb; ++j) {
callBLAS.GEMM('T', 'N', blockSize, blockSize, xr,
1.0, X.Values()+(knownEV+j*blockSize)*xr, xr, KX.Values(), xr,
0.0, tmpKK, blockSize);
MyComm.SumAll(tmpKK, S, blockSize*blockSize);
int iC;
for (iC = 0; iC < blockSize; ++iC) {
double *Kpointer = KK + localSize*dimSearch + j*blockSize + iC*dimSearch;
memcpy(Kpointer, S + iC*blockSize, blockSize*sizeof(double));
}
}
timeLocalProj += MyWatch.WallTime();
// Perform a spectral decomposition
timeLocalSolve -= MyWatch.WallTime();
int nevLocal = localSize + blockSize;
info = modalTool.directSolver(localSize+blockSize, KK, dimSearch, 0, 0,
nevLocal, S, dimSearch, theta, localVerbose, 10);
timeLocalSolve += MyWatch.WallTime();
if (info != 0) {
// Stop as spectral decomposition has a critical failure
if (info < 0) {
criticalExit = true;
break;
}
// Restart as spectral decomposition failed
if (localVerbose > 0) {
cout << " Iteration " << outerIter;
cout << "- Failure for spectral decomposition - RESTART with new random search\n";
}
reStart = true;
numRestart += 1;
timeRestart -= MyWatch.WallTime();
Epetra_MultiVector Xinit(View, X, knownEV, blockSize);
Xinit.Random();
timeRestart += MyWatch.WallTime();
nFound = blockSize;
bStart = 0;
break;
} // if (info != 0)
// Update the search space
// Note: Use KX as a workspace
timeLocalUpdate -= MyWatch.WallTime();
callBLAS.GEMM('N', 'N', xr, blockSize, localSize+blockSize, 1.0, X.Values()+knownEV*xr, xr,
S, dimSearch, 0.0, KX.Values(), xr);
timeLocalUpdate += MyWatch.WallTime();
// Apply the mass matrix for the next block
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(KX, MX);
timeMassOp += MyWatch.WallTime();
massOp += blockSize;
// Apply the stiffness matrix for the next block
timeStifOp -= MyWatch.WallTime();
K->Apply(KX, R);
timeStifOp += MyWatch.WallTime();
stifOp += blockSize;
// Form the residuals
timeResidual -= MyWatch.WallTime();
if (M) {
for (j = 0; j < blockSize; ++j) {
callBLAS.AXPY(xr, -theta[j], MX.Values() + j*xr, R.Values() + j*xr);
}
}
else {
// Note KX contains the updated block
for (j = 0; j < blockSize; ++j) {
callBLAS.AXPY(xr, -theta[j], KX.Values() + j*xr, R.Values() + j*xr);
}
}
timeResidual += MyWatch.WallTime();
residual += blockSize;
// Compute the norm of residuals
timeNorm -= MyWatch.WallTime();
if (vectWeight) {
R.NormWeighted(*vectWeight, normR);
}
else {
R.Norm2(normR);
}
// Scale the norms of residuals with the eigenvalues
// Count the number of converged eigenvectors
nFound = 0;
for (j = 0; j < blockSize; ++j) {
normR[j] = (theta[j] == 0.0) ? normR[j] : normR[j]/theta[j];
if (normR[j] < tolEigenSolve)
nFound += 1;
} // for (j = 0; j < blockSize; ++j)
timeNorm += MyWatch.WallTime();
// Store the residual history
if (localVerbose > 2) {
memcpy(resHistory + historyCount*blockSize, normR, blockSize*sizeof(double));
spaceSizeHistory[historyCount] = localSize + blockSize;
historyCount += 1;
}
maxSpaceSize = (maxSpaceSize > localSize+blockSize) ? maxSpaceSize : localSize+blockSize;
sumSpaceSize += localSize + blockSize;
// Print information on current iteration
if (localVerbose > 0) {
cout << " Iteration " << outerIter << " - Number of converged eigenvectors ";
cout << knownEV + nFound << endl;
} // if (localVerbose > 0)
if (localVerbose > 1) {
cout << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
for (i=0; i<blockSize; ++i) {
cout << " Iteration " << outerIter << " - Scaled Norm of Residual " << i;
cout << " = " << normR[i] << endl;
}
cout << endl;
cout.precision(2);
for (i=0; i<nevLocal; ++i) {
cout << " Iteration " << outerIter << " - Ritz eigenvalue " << i;
cout.setf((fabs(theta[i]) < 0.01) ? ios::scientific : ios::fixed, ios::floatfield);
cout << " = " << theta[i] << endl;
}
cout << endl;
}
// Exit the loop to treat the converged eigenvectors
if (nFound > 0) {
nb += 1;
offSet = 0;
break;
}
// Apply the preconditioner on the residuals
// Note: Use KX as a workspace
if (maxBlock == 1) {
if (Prec) {
timePrecOp -= MyWatch.WallTime();
Prec->ApplyInverse(R, Xcurrent);
timePrecOp += MyWatch.WallTime();
precOp += blockSize;
}
else {
memcpy(Xcurrent.Values(), R.Values(), blockSize*xr*sizeof(double));
}
timeRestart -= MyWatch.WallTime();
Xcurrent.Update(1.0, KX, -1.0);
timeRestart += MyWatch.WallTime();
break;
} // if (maxBlock == 1)
if (nb == maxBlock - 1) {
nb += 1;
break;
}
Epetra_MultiVector Xnext(View, X, knownEV+localSize+blockSize, blockSize);
if (Prec) {
timePrecOp -= MyWatch.WallTime();
Prec->ApplyInverse(R, Xnext);
timePrecOp += MyWatch.WallTime();
precOp += blockSize;
}
else {
memcpy(Xnext.Values(), R.Values(), blockSize*xr*sizeof(double));
}
} // for (nb = bStart; nb < maxBlock; ++nb)
if (outerIter > maxIterEigenSolve)
break;
if (reStart == true) {
reStart = false;
continue;
}
if (criticalExit == true)
break;
// Store the final converged eigenvectors
if (knownEV + nFound >= numEigen) {
for (j = 0; j < blockSize; ++j) {
if (normR[j] < tolEigenSolve) {
memcpy(X.Values() + knownEV*xr, KX.Values() + j*xr, xr*sizeof(double));
lambda[knownEV] = theta[j];
knownEV += 1;
}
}
if (localVerbose == 1) {
cout << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
for (i=0; i<blockSize; ++i) {
cout << " Iteration " << outerIter << " - Scaled Norm of Residual " << i;
cout << " = " << normR[i] << endl;
}
cout << endl;
}
break;
} // if (knownEV + nFound >= numEigen)
// Treat the particular case of 1 block
if (maxBlock == 1) {
if (nFound > 0) {
double *Xpointer = X.Values() + (knownEV+nFound)*xr;
nFound = 0;
for (j = 0; j < blockSize; ++j) {
if (normR[j] < tolEigenSolve) {
memcpy(X.Values() + knownEV*xr, KX.Values() + j*xr, xr*sizeof(double));
lambda[knownEV] = theta[j];
knownEV += 1;
nFound += 1;
}
else {
memcpy(Xpointer + (j-nFound)*xr, KX.Values() + j*xr, xr*sizeof(double));
}
}
Epetra_MultiVector Xnext(View, X, knownEV + blockSize - nFound, nFound);
Xnext.Random();
}
else {
nFound = blockSize;
}
continue;
}
// Define the restarting block when maxBlock > 1
if (nFound > 0) {
int firstIndex = blockSize;
for (j = 0; j < blockSize; ++j) {
if (normR[j] >= tolEigenSolve) {
firstIndex = j;
break;
}
} // for (j = 0; j < blockSize; ++j)
while (firstIndex < nFound) {
for (j = firstIndex; j < blockSize; ++j) {
if (normR[j] < tolEigenSolve) {
// Swap the j-th and firstIndex-th position
callFortran.SWAP(nb*blockSize, S + j*dimSearch, 1, S + firstIndex*dimSearch, 1);
callFortran.SWAP(1, theta + j, 1, theta + firstIndex, 1);
callFortran.SWAP(1, normR + j, 1, normR + firstIndex, 1);
break;
}
} // for (j = firstIndex; j < blockSize; ++j)
for (j = 0; j < blockSize; ++j) {
if (normR[j] >= tolEigenSolve) {
firstIndex = j;
break;
}
} // for (j = 0; j < blockSize; ++j)
} // while (firstIndex < nFound)
// Copy the converged eigenvalues
memcpy(lambda + knownEV, theta, nFound*sizeof(double));
} // if (nFound > 0)
// Define the restarting size
bStart = ((nb - offSet) > 2) ? (nb - offSet)/2 : 0;
// Define the restarting space and local stiffness
timeRestart -= MyWatch.WallTime();
memset(KK, 0, nb*blockSize*dimSearch*sizeof(double));
for (j = 0; j < bStart*blockSize; ++j) {
KK[j + j*dimSearch] = theta[j + nFound];
}
// Form the restarting space
int oldCol = nb*blockSize;
int newCol = nFound + (bStart+1)*blockSize;
newCol = (newCol > oldCol) ? oldCol : newCol;
callFortran.GEQRF(oldCol, newCol, S, dimSearch, theta, R.Values(), xr*blockSize, &info);
callFortran.ORMQR('R', 'N', xr, oldCol, newCol, S, dimSearch, theta,
X.Values()+knownEV*xr, xr, R.Values(), blockSize*xr, &info);
timeRestart += MyWatch.WallTime();
if (nFound == 0)
offSet += 1;
knownEV += nFound;
maxBlock = (dimSearch/blockSize) - (knownEV/blockSize);
// Put random vectors if the Rayleigh Ritz vectors are not enough
newCol = nFound + (bStart+1)*blockSize;
if (newCol > oldCol) {
Epetra_MultiVector Xnext(View, X, knownEV+blockSize-nFound, nFound);
Xnext.Random();
continue;
}
nFound = 0;
} // while (outerIter <= maxIterEigenSolve)
timeOuterLoop += MyWatch.WallTime();
highMem = (highMem > currentSize()) ? highMem : currentSize();
// Clean memory
delete[] work1;
delete[] work2;
if (vectWeight)
delete vectWeight;
// Sort the eigenpairs
timePostProce -= MyWatch.WallTime();
if ((info == 0) && (knownEV > 0)) {
mySort.sortScalars_Vectors(knownEV, lambda, Q.Values(), Q.MyLength());
}
timePostProce += MyWatch.WallTime();
return (info == 0) ? knownEV : info;
}
int ModifiedARPACKm3::reSolve(int numEigen, Epetra_MultiVector &Q, double *lambda,
int startingEV, const Epetra_MultiVector *orthoVec) {
// Computes the smallest eigenvalues and the corresponding eigenvectors
// of the generalized eigenvalue problem
//
// K X = M X Lambda
//
// using ModifiedARPACK (mode 3).
//
// The convergence test is performed outisde of ARPACK
//
// || Kx - Mx lambda || < tol*lambda
//
// The norm ||.|| can be specified by the user through the array normWeight.
// By default, the L2 Euclidean norm is used.
//
// Note that if M is not specified, then K X = X Lambda is solved.
// (using the mode for generalized eigenvalue problem).
//
// Input variables:
//
// numEigen (integer) = Number of eigenmodes requested
//
// Q (Epetra_MultiVector) = Initial search space
// The number of columns of Q defines the size of search space (=NCV).
// The rows of X are distributed across processors.
// As a rule of thumb in ARPACK User's guide, NCV >= 2*numEigen.
// At exit, the first numEigen locations contain the eigenvectors requested.
//
// lambda (array of doubles) = Converged eigenvalues
// The length of this array is equal to the number of columns in Q.
// At exit, the first numEigen locations contain the eigenvalues requested.
//
// startingEV (integer) = Number of eigenmodes already stored in Q
// A linear combination of these vectors is made to define the starting
// vector, placed in resid.
//
// orthoVec (Pointer to Epetra_MultiVector) = Space to be orthogonal to
// The computation is performed in the orthogonal of the space spanned
// by the columns vectors in orthoVec.
//
// Return information on status of computation
//
// info >= 0 >> Number of converged eigenpairs at the end of computation
//
// // Failure due to input arguments
//
// info = - 1 >> The stiffness matrix K has not been specified.
// info = - 2 >> The maps for the matrix K and the matrix M differ.
// info = - 3 >> The maps for the matrix K and the preconditioner P differ.
// info = - 4 >> The maps for the vectors and the matrix K differ.
// info = - 5 >> Q is too small for the number of eigenvalues requested.
// info = - 6 >> Q is too small for the computation parameters.
//
// info = - 8 >> numEigen must be smaller than the dimension of the matrix.
//
// info = - 30 >> MEMORY
//
// See ARPACK documentation for the meaning of INFO
if (numEigen <= startingEV) {
return numEigen;
}
int info = myVerify.inputArguments(numEigen, K, M, 0, Q, minimumSpaceDimension(numEigen));
if (info < 0)
return info;
int myPid = MyComm.MyPID();
int localSize = Q.MyLength();
int NCV = Q.NumVectors();
int knownEV = 0;
if (NCV > Q.GlobalLength()) {
if (numEigen >= Q.GlobalLength()) {
cerr << endl;
cerr << " !! The number of requested eigenvalues must be smaller than the dimension";
cerr << " of the matrix !!\n";
cerr << endl;
return -8;
}
NCV = Q.GlobalLength();
}
// Get the weight for approximating the M-inverse norm
Epetra_Vector *vectWeight = 0;
if (normWeight) {
vectWeight = new Epetra_Vector(View, Q.Map(), normWeight);
}
int localVerbose = verbose*(myPid == 0);
// Define data for ARPACK
//
// UH (10/17/03) Note that workl is also used
// * to store the eigenvectors of the tridiagonal matrix
// * as a workspace for DSTEQR
// * as a workspace for recovering the global eigenvectors
highMem = (highMem > currentSize()) ? highMem : currentSize();
int ido = 0;
int lwI = 22;
int *wI = new (nothrow) int[lwI];
if (wI == 0) {
if (vectWeight)
delete vectWeight;
return -30;
}
memRequested += sizeof(int)*lwI/(1024.0*1024.0);
int *iparam = wI;
int *ipntr = wI + 11;
int lworkl = NCV*(NCV+8);
int lwD = lworkl + 4*localSize;
double *wD = new (nothrow) double[lwD];
if (wD == 0) {
if (vectWeight)
delete vectWeight;
delete[] wI;
return -30;
}
memRequested += sizeof(double)*(4*localSize+lworkl)/(1024.0*1024.0);
double *pointer = wD;
double *workl = pointer;
pointer = pointer + lworkl;
double *resid = pointer;
pointer = pointer + localSize;
double *workd = pointer;
double *v = Q.Values();
highMem = (highMem > currentSize()) ? highMem : currentSize();
if (startingEV > 0) {
// Define the initial starting vector
memset(resid, 0, localSize*sizeof(double));
for (int jj = 0; jj < startingEV; ++jj)
for (int ii = 0; ii < localSize; ++ii)
resid[ii] += v[ii + jj*localSize];
info = 1;
}
iparam[1-1] = 1;
iparam[3-1] = maxIterEigenSolve;
iparam[7-1] = 3;
// The fourth parameter forces to use the convergence test provided by ARPACK.
// This requires a customization of ARPACK (provided by R. Lehoucq).
iparam[4-1] = 1;
Epetra_Vector v1(View, Q.Map(), workd);
Epetra_Vector v2(View, Q.Map(), workd + localSize);
Epetra_Vector v3(View, Q.Map(), workd + 2*localSize);
// Define further storage for the new residual check
// Use a block of vectors to compute the residuals more quickly.
// Note that workd could be used if memory becomes an issue.
int loopZ = (NCV > 10) ? 10 : NCV;
int lwD2 = localSize + 2*NCV-1 + NCV;
lwD2 += (M) ? 3*loopZ*localSize : 2*loopZ*localSize;
double *wD2 = new (nothrow) double[lwD2];
if (wD2 == 0) {
if (vectWeight)
delete vectWeight;
delete[] wI;
delete[] wD;
return -30;
}
memRequested += sizeof(double)*lwD2/(1024.0*1024.0);
pointer = wD2;
// vTmp is used when ido = -1
double *vTmp = pointer;
pointer = pointer + localSize;
// dd and ee stores the tridiagonal matrix.
// Note that DSTEQR destroys the contents of the input arrays.
double *dd = pointer;
pointer = pointer + NCV;
double *ee = pointer;
pointer = pointer + NCV-1;
double *vz = pointer;
pointer = pointer + loopZ*localSize;
Epetra_MultiVector approxEV(View, Q.Map(), vz, localSize, loopZ);
double *kvz = pointer;
pointer = pointer + loopZ*localSize;
Epetra_MultiVector KapproxEV(View, Q.Map(), kvz, localSize, loopZ);
double *mvz = (M) ? pointer : vz;
pointer = (M) ? pointer + loopZ*localSize : pointer;
Epetra_MultiVector MapproxEV(View, Q.Map(), mvz, localSize, loopZ);
double *normR = pointer;
// zz contains the eigenvectors of the tridiagonal matrix.
// workt is a workspace for DSTEQR.
// Note that zz and workt will use parts of workl.
double *zz, *workt;
highMem = (highMem > currentSize()) ? highMem : currentSize();
// Define an array to store the residuals history
if (localVerbose > 2) {
resHistory = new (nothrow) double[maxIterEigenSolve*NCV];
if (resHistory == 0) {
if (vectWeight)
delete vectWeight;
delete[] wI;
delete[] wD;
delete[] wD2;
return -30;
}
historyCount = 0;
}
highMem = (highMem > currentSize()) ? highMem : currentSize();
if (localVerbose > 0) {
cout << endl;
cout << " *|* Problem: ";
if (M)
cout << "K*Q = M*Q D ";
else
cout << "K*Q = Q D ";
cout << endl;
cout << " *|* Algorithm = ARPACK (Mode 3, modified such that user checks convergence)" << endl;
cout << " *|* Number of requested eigenvalues = " << numEigen << endl;
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
cout << " *|* Tolerance for convergence = " << tolEigenSolve << endl;
if (startingEV > 0)
cout << " *|* User-defined starting vector (Combination of " << startingEV << " vectors)\n";
cout << " *|* Norm used for convergence: ";
if (normWeight)
cout << "weighted L2-norm with user-provided weights" << endl;
else
cout << "L^2-norm" << endl;
if (orthoVec)
cout << " *|* Size of orthogonal subspace = " << orthoVec->NumVectors() << endl;
cout << "\n -- Start iterations -- \n";
}
#ifdef EPETRA_MPI
Epetra_MpiComm *MPIComm = dynamic_cast<Epetra_MpiComm *>(const_cast<Epetra_Comm*>(&MyComm));
#endif
timeOuterLoop -= MyWatch.WallTime();
while (ido != 99) {
highMem = (highMem > currentSize()) ? highMem : currentSize();
#ifdef EPETRA_MPI
if (MPIComm)
callFortran.PSAUPD(MPIComm->Comm(), &ido, 'G', localSize, "LM", numEigen, tolEigenSolve,
resid, NCV, v, localSize, iparam, ipntr, workd, workl, lworkl, &info, 0);
else
callFortran.SAUPD(&ido, 'G', localSize, "LM", numEigen, tolEigenSolve, resid, NCV, v,
localSize, iparam, ipntr, workd, workl, lworkl, &info, 0);
#else
callFortran.SAUPD(&ido, 'G', localSize, "LM", numEigen, tolEigenSolve, resid, NCV, v,
localSize, iparam, ipntr, workd, workl, lworkl, &info, 0);
#endif
if (ido == -1) {
// Apply the mass matrix
v3.ResetView(workd + ipntr[0] - 1);
v1.ResetView(vTmp);
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(v3, v1);
else
memcpy(v1.Values(), v3.Values(), localSize*sizeof(double));
timeMassOp += MyWatch.WallTime();
massOp += 1;
if ((orthoVec) && (verbose > 3)) {
// Check the orthogonality
double maxDot = myVerify.errorOrthogonality(orthoVec, &v1, 0);
if (myPid == 0) {
cout << " Maximum Euclidean dot product against orthogonal space (Before Solve) = ";
cout << maxDot << endl;
}
}
// Solve the stiffness problem
v2.ResetView(workd + ipntr[1] - 1);
timeStifOp -= MyWatch.WallTime();
K->ApplyInverse(v1, v2);
timeStifOp += MyWatch.WallTime();
stifOp += 1;
// Project the solution vector if needed
// Note: Use mvz as workspace
if (orthoVec) {
Epetra_Vector Mv2(View, v2.Map(), mvz);
if (M)
M->Apply(v2, Mv2);
else
memcpy(Mv2.Values(), v2.Values(), localSize*sizeof(double));
modalTool.massOrthonormalize(v2, Mv2, M, *orthoVec, 1, 1);
}
if ((orthoVec) && (verbose > 3)) {
// Check the orthogonality
double maxDot = myVerify.errorOrthogonality(orthoVec, &v2, M);
if (myPid == 0) {
cout << " Maximum M-dot product against orthogonal space (After Solve) = ";
cout << maxDot << endl;
}
}
continue;
} // if (ido == -1)
if (ido == 1) {
// Solve the stiffness problem
v1.ResetView(workd + ipntr[2] - 1);
v2.ResetView(workd + ipntr[1] - 1);
if ((orthoVec) && (verbose > 3)) {
// Check the orthogonality
double maxDot = myVerify.errorOrthogonality(orthoVec, &v1, 0);
if (myPid == 0) {
cout << " Maximum Euclidean dot product against orthogonal space (Before Solve) = ";
cout << maxDot << endl;
}
}
timeStifOp -= MyWatch.WallTime();
K->ApplyInverse(v1, v2);
timeStifOp += MyWatch.WallTime();
stifOp += 1;
// Project the solution vector if needed
// Note: Use mvz as workspace
if (orthoVec) {
Epetra_Vector Mv2(View, v2.Map(), mvz);
if (M)
M->Apply(v2, Mv2);
else
memcpy(Mv2.Values(), v2.Values(), localSize*sizeof(double));
modalTool.massOrthonormalize(v2, Mv2, M, *orthoVec, 1, 1);
}
if ((orthoVec) && (verbose > 3)) {
// Check the orthogonality
double maxDot = myVerify.errorOrthogonality(orthoVec, &v2, M);
if (myPid == 0) {
cout << " Maximum M-dot product against orthogonal space (After Solve) = ";
cout << maxDot << endl;
}
}
continue;
} // if (ido == 1)
if (ido == 2) {
// Apply the mass matrix
v1.ResetView(workd + ipntr[0] - 1);
v2.ResetView(workd + ipntr[1] - 1);
timeMassOp -= MyWatch.WallTime();
if (M)
M->Apply(v1, v2);
else
memcpy(v2.Values(), v1.Values(), localSize*sizeof(double));
timeMassOp += MyWatch.WallTime();
massOp += 1;
continue;
} // if (ido == 2)
if (ido == 4) {
timeResidual -= MyWatch.WallTime();
// Copy the main diagonal of T
memcpy(dd, workl + NCV + ipntr[4] - 1, NCV*sizeof(double));
// Copy the lower diagonal of T
memcpy(ee, workl + ipntr[4], (NCV-1)*sizeof(double));
// Compute the eigenpairs of the tridiagonal matrix
zz = workl + 4*NCV;
workt = workl + 4*NCV + NCV*NCV;
callFortran.STEQR('I', NCV, dd, ee, zz, NCV, workt, &info);
if (info != 0) {
if (localVerbose > 0) {
cerr << endl;
cerr << " Error with DSTEQR, info = " << info << endl;
cerr << endl;
}
break;
}
// dd contains the eigenvalues in ascending order
// Check the residual of the proposed eigenvectors of (K, M)
int ii, jz;
iparam[4] = 0;
for (jz = 0; jz < NCV; jz += loopZ) {
int colZ = (jz + loopZ < NCV) ? loopZ : NCV - jz;
callBLAS.GEMM('N', 'N', localSize, colZ, NCV, 1.0, v, localSize,
zz + jz*NCV, NCV, 0.0, vz, localSize);
// Form the residuals
if (M)
M->Apply(approxEV, MapproxEV);
K->Apply(approxEV, KapproxEV);
for (ii = 0; ii < colZ; ++ii) {
callBLAS.AXPY(localSize, -1.0/dd[ii+jz], MapproxEV.Values() + ii*localSize,
KapproxEV.Values() + ii*localSize);
}
// Compute the norms of the residuals
if (vectWeight) {
KapproxEV.NormWeighted(*vectWeight, normR + jz);
}
else {
KapproxEV.Norm2(normR + jz);
}
// Scale the norms of residuals with the eigenvalues
for (ii = 0; ii < colZ; ++ii) {
normR[ii+jz] = normR[ii+jz]*dd[ii+jz];
}
// Put the number of converged pairs in iparam[5-1]
for (ii=0; ii<colZ; ++ii) {
if (normR[ii+jz] < tolEigenSolve)
iparam[4] += 1;
}
}
timeResidual += MyWatch.WallTime();
numResidual += NCV;
outerIter += 1;
if (localVerbose > 0) {
cout << " Iteration " << outerIter;
cout << " - Number of converged eigenvalues " << iparam[4] << endl;
}
if (localVerbose > 2) {
memcpy(resHistory + historyCount, normR, NCV*sizeof(double));
historyCount += NCV;
}
if (localVerbose > 1) {
cout.precision(2);
cout.setf(ios::scientific, ios::floatfield);
for (ii=0; ii < NCV; ++ii) {
cout << " Iteration " << outerIter;
cout << " - Scaled Norm of Residual " << ii << " = " << normR[ii] << endl;
}
cout << endl;
cout.precision(2);
for (ii = 0; ii < NCV; ++ii) {
cout << " Iteration " << outerIter << " - Ritz eigenvalue " << ii;
cout.setf((fabs(dd[ii]) > 100) ? ios::scientific : ios::fixed, ios::floatfield);
cout << " = " << 1.0/dd[ii] << endl;
}
cout << endl;
}
} // if (ido == 4)
} // while (ido != 99)
timeOuterLoop += MyWatch.WallTime();
highMem = (highMem > currentSize()) ? highMem : currentSize();
if (info < 0) {
if (myPid == 0) {
cerr << endl;
cerr << " Error with DSAUPD, info = " << info << endl;
cerr << endl;
}
}
else {
// Get the eigenvalues
timePostProce -= MyWatch.WallTime();
int ii, jj;
double *pointer = workl + 4*NCV + NCV*NCV;
for (ii=0; ii < localSize; ii += 3) {
int nRow = (ii + 3 < localSize) ? 3 : localSize - ii;
for (jj=0; jj<NCV; ++jj)
memcpy(pointer + jj*nRow, v + ii + jj*localSize, nRow*sizeof(double));
callBLAS.GEMM('N', 'N', nRow, NCV, NCV, 1.0, pointer, nRow, zz, NCV,
0.0, Q.Values() + ii, localSize);
}
// Put the converged eigenpairs at the beginning
knownEV = 0;
for (ii=0; ii < NCV; ++ii) {
if (normR[ii] < tolEigenSolve) {
lambda[knownEV] = 1.0/dd[ii];
memcpy(Q.Values()+knownEV*localSize, Q.Values()+ii*localSize, localSize*sizeof(double));
knownEV += 1;
if (knownEV == Q.NumVectors())
break;
}
}
// Sort the eigenpairs
if (knownEV > 0) {
mySort.sortScalars_Vectors(knownEV, lambda, Q.Values(), localSize);
}
timePostProce += MyWatch.WallTime();
} // if (info < 0)
if (info == 0) {
orthoOp = iparam[11-1];
}
delete[] wI;
delete[] wD;
delete[] wD2;
if (vectWeight)
delete vectWeight;
return (info == 0) ? knownEV : info;
}
QRect MonitorSettings::geometry()
{
return QRect(QPoint(xPos, yPos), currentSize());
}
qulonglong TrashSizeCache::size() const
{
return currentSize( true );
}
void TrashSizeCache::initialize()
{
// we call just currentSize here, as it does the initialization for us
currentSize( true );
}
