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Started to modify the matrix builder to be a bit smarter about preallocation. 

Former-commit-id: 50be5c8af1
tempestpy_adaptions
dehnert 10 years ago
parent
ac420f13d0
commit
f767cfe844
2 changed files with 47 additions and 105 deletions
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  1. 142
      src/storage/SparseMatrix.cpp
  2. 2
      src/storage/SparseMatrix.h

142
src/storage/SparseMatrix.cpp
View File

@ -59,26 +59,6 @@ namespace storm {
template<typename ValueType>
void SparseMatrixBuilder<ValueType>::addNextValue(index_type row, index_type column, ValueType const& value) {
// Depending on whether the internal data storage was preallocated or not, adding the value is done somewhat
// differently.
if (storagePreallocated) {
// Check whether the given row and column positions are valid and throw error otherwise.
if (row >= rowCount || column >= columnCount) {
throw storm::exceptions::OutOfRangeException() << "Illegal call to SparseMatrixBuilder::addNextValue: adding entry at out-of-bounds position (" << row << ", " << column << ") in matrix of size (" << rowCount << ", " << columnCount << ").";
}
} else {
if (rowCountSet) {
if (row >= rowCount) {
throw storm::exceptions::OutOfRangeException() << "Illegal call to SparseMatrixBuilder::addNextValue: adding entry at out-of-bounds row " << row << " in matrix with " << rowCount << " rows.";
}
}
if (columnCountSet) {
if (column >= columnCount) {
throw storm::exceptions::OutOfRangeException() << "Illegal call to SparseMatrixBuilder::addNextValue: adding entry at out-of-bounds column " << column << " in matrix with " << columnCount << " columns.";
}
}
}
// Check that we did not move backwards wrt. the row.
if (row < lastRow) {
throw storm::exceptions::InvalidArgumentException() << "Illegal call to SparseMatrixBuilder::addNextValue: adding an element in row " << row << ", but an element in row " << lastRow << " has already been added.";
@ -91,23 +71,14 @@ namespace storm {
// If we switched to another row, we have to adjust the missing entries in the row indices vector.
if (row != lastRow) {
if (storagePreallocated) {
// If the storage was preallocated, we can access the elements in the vectors with the subscript
// operator.
for (index_type i = lastRow + 1; i <= row; ++i) {
rowIndications[i] = currentEntryCount;
}
} else {
// Otherwise, we need to push the correct values to the vectors, which might trigger reallocations.
for (index_type i = lastRow + 1; i <= row; ++i) {
rowIndications.push_back(currentEntryCount);
}
// Otherwise, we need to push the correct values to the vectors, which might trigger reallocations.
for (index_type i = lastRow + 1; i <= row; ++i) {
rowIndications.push_back(currentEntryCount);
}
if (!hasCustomRowGrouping) {
for (index_type i = lastRow + 1; i <= row; ++i) {
rowGroupIndices.push_back(i);
++currentRowGroup;
}
}
@ -121,12 +92,8 @@ namespace storm {
columnsAndValues[currentEntryCount] = std::make_pair(column, value);
} else {
columnsAndValues.emplace_back(column, value);
if (!columnCountSet) {
columnCount = std::max(columnCount, column + 1);
}
if (!rowCountSet) {
rowCount = row + 1;
}
columnCount = std::max(columnCount, column + 1);
rowCount = row + 1;
}
++currentEntryCount;
}
@ -138,60 +105,41 @@ namespace storm {
} else if (rowGroupIndices.size() > 0 && startingRow < rowGroupIndices.back()) {
throw storm::exceptions::InvalidStateException() << "Illegal call to SparseMatrix::newRowGroup: illegal row group with negative size.";
}
if (rowGroupCountSet) {
rowGroupIndices[currentRowGroup] = startingRow;
++currentRowGroup;
} else {
rowGroupIndices.push_back(startingRow);
}
rowGroupIndices.push_back(startingRow);
}
template<typename ValueType>
SparseMatrix<ValueType> SparseMatrixBuilder<ValueType>::build(index_type overriddenRowCount, index_type overriddenColumnCount, index_type overriddenRowGroupCount) {
// Check whether it's safe to finalize the matrix and throw error otherwise.
if (storagePreallocated && currentEntryCount != entryCount) {
throw storm::exceptions::InvalidStateException() << "Illegal call to SparseMatrix::build: expected " << entryCount << " entries, but got " << currentEntryCount << " instead.";
} else {
// Fill in the missing entries in the row indices array, as there may be empty rows at the end.
if (storagePreallocated) {
for (index_type i = lastRow + 1; i < rowCount; ++i) {
rowIndications[i] = currentEntryCount;
}
} else {
if (!rowCountSet) {
rowCount = std::max(overriddenRowCount, rowCount);
}
for (index_type i = lastRow + 1; i < rowCount; ++i) {
rowIndications.push_back(currentEntryCount);
}
}
// We put a sentinel element at the last position of the row indices array. This eases iteration work,
// as now the indices of row i are always between rowIndications[i] and rowIndications[i + 1], also for
// the first and last row.
if (storagePreallocated) {
rowIndications[rowCount] = currentEntryCount;
} else {
// If the current row count was overridden, we may need to add empty rows.
if (overriddenRowCount > rowCount) {
for (index_type i = lastRow + 1; i < rowCount; ++i) {
rowIndications.push_back(currentEntryCount);
if (!columnCountSet) {
columnCount = std::max(columnCount, overriddenColumnCount);
}
}
}
entryCount = currentEntryCount;
// We put a sentinel element at the last position of the row indices array. This eases iteration work,
// as now the indices of row i are always between rowIndications[i] and rowIndications[i + 1], also for
// the first and last row.
rowIndications.push_back(currentEntryCount);
if (hasCustomRowGrouping && rowGroupCountSet) {
rowGroupIndices[rowGroupCount] = rowCount;
} else {
if (!hasCustomRowGrouping) {
for (index_type i = currentRowGroup; i < rowCount; ++i) {
rowGroupIndices.push_back(i + 1);
}
} else {
overriddenRowGroupCount = std::max(overriddenRowGroupCount, currentRowGroup + 1);
for (index_type i = currentRowGroup; i < overriddenRowGroupCount; ++i) {
rowGroupIndices.push_back(rowCount);
}
// Check whether the column count has been overridden.
if (overriddenColumnCount > columnCount) {
columnCount = overriddenColumnCount;
}
entryCount = currentEntryCount;
// Check whether row groups are missing some entries.
if (!hasCustomRowGrouping) {
for (index_type i = currentRowGroup; i < rowCount; ++i) {
rowGroupIndices.push_back(i + 1);
}
} else {
// Check if the row group count has been overridden.
if (overriddenRowGroupCount > currentRowGroup + 1) {
for (index_type i = currentRowGroup; i < overriddenRowGroupCount; ++i) {
rowGroupIndices.push_back(rowCount);
}
}
}
@ -201,25 +149,17 @@ namespace storm {
template<typename ValueType>
void SparseMatrixBuilder<ValueType>::prepareInternalStorage() {
// Only allocate the memory for the matrix contents if the dimensions of the matrix are already known.
if (storagePreallocated) {
columnsAndValues = std::vector<MatrixEntry<index_type, ValueType>>(entryCount, MatrixEntry<index_type, ValueType>(0, storm::utility::constantZero<ValueType>()));
rowIndications = std::vector<index_type>(rowCount + 1, 0);
} else {
rowIndications.push_back(0);
if (rowCount > 0) {
rowIndications.reserve(rowCount + 1);
}
// Only allocate the memory for the row grouping of the matrix contents if the number of groups is already
// known.
if (hasCustomRowGrouping && rowGroupCountSet) {
rowGroupIndices = std::vector<index_type>(rowGroupCount + 1, 0);
} else {
if (hasCustomRowGrouping) {
// Nothing to do in this case
} else {
rowGroupIndices.push_back(0);
}
if (entryCount > 0) {
columnsAndValues.reserve(entryCount);
}
if (rowGroupCount > 0) {
rowGroupIndices.reserve(rowGroupCount + 1);
}
rowIndications.push_back(0);
rowGroupIndices.push_back(0);
}
template<typename ValueType>

2
src/storage/SparseMatrix.h
View File

@ -122,6 +122,8 @@ namespace storm {
/*!
* Constructs a sparse matrix builder producing a matrix with the given number of rows, columns and entries.
* The number of rows, columns and entries is reserved upon creation. If more rows/columns or entries are
* added, this will possibly lead to a reallocation.
*
* @param rows The number of rows of the resulting matrix.
* @param columns The number of columns of the resulting matrix.

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