Package org.apache.sysds.runtime.compress.colgroup

Class ColGroupDDCFOR

    • Method Detail

      • getIdx

        public double getIdx​(int r,
                     int colIdx)
        Description copied from class: AColGroup
        Get the value at a colGroup specific row/column index position.
        Specified by:
        getIdx in class AColGroup
        Parameters:
        r - row
        colIdx - column index in the _colIndexes.
        Returns:
        value at the row/column index position

      • getCounts

        public int[] getCounts​(int[] counts)

      • getColGroupType

        public org.apache.sysds.runtime.compress.colgroup.AColGroup.ColGroupType getColGroupType()

      • estimateInMemorySize

        public long estimateInMemorySize()
        Description copied from class: AColGroup
        Get the upper bound estimate of in memory allocation for the column group.
        Overrides:
        estimateInMemorySize in class AColGroupValue
        Returns:
        an upper bound on the number of bytes used to store this ColGroup in memory.

      • scalarOperation

        public AColGroup scalarOperation​(ScalarOperator op)
        Description copied from class: AColGroup
        Perform the specified scalar operation directly on the compressed column group, without decompressing individual cells if possible.
        Specified by:
        scalarOperation in class AColGroup
        Parameters:
        op - operation to perform
        Returns:
        version of this column group with the operation applied

      • unaryOperation

        public AColGroup unaryOperation​(UnaryOperator op)
        Description copied from class: AColGroup
        Perform unary operation on the column group and return a new column group
        Specified by:
        unaryOperation in class AColGroup
        Parameters:
        op - The operation to perform
        Returns:
        The new column group

      • binaryRowOpLeft

        public AColGroup binaryRowOpLeft​(BinaryOperator op,
                                 double[] v,
                                 boolean isRowSafe)
        Description copied from class: AColGroup
        Perform a binary row operation.
        Specified by:
        binaryRowOpLeft in class AColGroup
        Parameters:
        op - The operation to execute
        v - The vector of values to apply the values contained should be at least the length of the highest value in the column index
        isRowSafe - True if the binary op is applied to an entire zero row and all results are zero
        Returns:
        A updated column group with the new values.

      • binaryRowOpRight

        public AColGroup binaryRowOpRight​(BinaryOperator op,
                                  double[] v,
                                  boolean isRowSafe)
        Description copied from class: AColGroup
        Perform a binary row operation.
        Specified by:
        binaryRowOpRight in class AColGroup
        Parameters:
        op - The operation to execute
        v - The vector of values to apply the values contained should be at least the length of the highest value in the column index
        isRowSafe - True if the binary op is applied to an entire zero row and all results are zero
        Returns:
        A updated column group with the new values.

      • getExactSizeOnDisk

        public long getExactSizeOnDisk()
        Description copied from class: AColGroup
        Returns the exact serialized size of column group. This can be used for example for buffer preallocation.
        Overrides:
        getExactSizeOnDisk in class ADictBasedColGroup
        Returns:
        exact serialized size for column group

      • getCost

        public double getCost​(ComputationCostEstimator e,
                      int nRows)
        Description copied from class: AColGroup
        Get the computation cost associated with this column group.
        Specified by:
        getCost in class AColGroup
        Parameters:
        e - The computation cost estimator
        nRows - the number of rows in the column group
        Returns:
        The cost of this column group

      • replace

        public AColGroup replace​(double pattern,
                         double replace)
        Description copied from class: AColGroup
        Make a copy of the column group values, and replace all values that match pattern with replacement value.
        Overrides:
        replace in class AColGroupValue
        Parameters:
        pattern - The value to look for
        replace - The value to replace the other value with
        Returns:
        A new Column Group, reusing the index structure but with new values.

      • computeColSums

        public void computeColSums​(double[] c,
                           int nRows)
        Description copied from class: AColGroup
        Compute the column sum
        Overrides:
        computeColSums in class AColGroupValue
        Parameters:
        c - The array to add the column sum to.
        nRows - The number of rows in the column group.

      • containsValue

        public boolean containsValue​(double pattern)
        Description copied from class: AColGroup
        Detect if the column group contains a specific value.
        Specified by:
        containsValue in class AColGroup
        Parameters:
        pattern - The value to look for.
        Returns:
        boolean saying true if the value is contained.

      • getNumberNonZeros

        public long getNumberNonZeros​(int nRows)
        Description copied from class: AColGroup
        Get the number of nonZeros contained in this column group.
        Overrides:
        getNumberNonZeros in class AColGroupValue
        Parameters:
        nRows - The number of rows in the column group, this is used for groups that does not contain information about how many rows they have.
        Returns:
        The nnz.

      • rexpandCols

        public AColGroup rexpandCols​(int max,
                             boolean ignore,
                             boolean cast,
                             int nRows)
        Description copied from class: AColGroup
        Expand the column group to multiple columns. (one hot encode the column group)
        Overrides:
        rexpandCols in class AColGroupValue
        Parameters:
        max - The number of columns to expand to and cutoff values at.
        ignore - If zero and negative values should be ignored.
        cast - If the double values contained should be cast to whole numbers.
        nRows - The number of rows in the column group.
        Returns:
        A new column group containing max number of columns.

      • centralMoment

        public CM_COV_Object centralMoment​(CMOperator op,
                                   int nRows)
        Description copied from class: AColGroup
        Central Moment instruction executed on a column group.
        Overrides:
        centralMoment in class AColGroupValue
        Parameters:
        op - The Operator to use.
        nRows - The number of rows contained in the ColumnGroup.
        Returns:
        A Central Moment object.

      • getCommon

        public double[] getCommon()
        Description copied from class: AMorphingMMColGroup
        Get common vector, note this should not materialize anything but simply point to things that are already allocated.
        Specified by:
        getCommon in class AMorphingMMColGroup
        Returns:
        the common double vector

      • sliceRows

        public AColGroup sliceRows​(int rl,
                           int ru)
        Description copied from class: AColGroup
        Slice range of rows out of the column group and return a new column group only containing the row segment. Note that this slice should maintain pointers back to the original dictionaries and only modify index structures.
        Specified by:
        sliceRows in class AColGroup
        Parameters:
        rl - The row to start at
        ru - The row to end at (not included)
        Returns:
        A new column group containing the specified row range.

      • append

        public AColGroup append​(AColGroup g)
        Description copied from class: AColGroup
        Append the other column group to this column group. This method tries to combine them to return a new column group containing both. In some cases it is possible in reasonable time, in others it is not. The result is first this column group followed by the other column group in higher row values. If it is not possible or very inefficient null is returned.
        Specified by:
        append in class AColGroup
        Parameters:
        g - The other column group
        Returns:
        A combined column group or null

      • appendNInternal

        public AColGroup appendNInternal​(AColGroup[] g,
                                 int blen,
                                 int rlen)

      • getCompressionScheme

        public ICLAScheme getCompressionScheme()
        Description copied from class: AColGroup
        Get the compression scheme for this column group to enable compression of other data.
        Specified by:
        getCompressionScheme in class AColGroup
        Returns:
        The compression scheme of this column group

      • recompress

        public AColGroup recompress()
        Description copied from class: AColGroup
        Recompress this column group into a new column group.
        Specified by:
        recompress in class AColGroup
        Returns:
        A new or the same column group depending on optimization goal.

      • getCompressionInfo

        public CompressedSizeInfoColGroup getCompressionInfo​(int nRow)
        Description copied from class: AColGroup
        Get the compression info for this column group.
        Specified by:
        getCompressionInfo in class AColGroup
        Parameters:
        nRow - The number of rows in this column group.
        Returns:
        The compression info for this group.

      • getEncoding

        public IEncode getEncoding()
        Description copied from class: AColGroup
        Get encoding of this column group.
        Overrides:
        getEncoding in class AColGroup
        Returns:
        The encoding of the index structure.

      • combineWithSameIndex

        public AColGroup combineWithSameIndex​(int nRow,
                                      int nCol,
                                      List<AColGroup> right)
        Description copied from class: AColGroup
        C bind the list of column groups with this column group. the list of elements provided in the index of each list is guaranteed to have the same index structures
        Overrides:
        combineWithSameIndex in class AColGroup
        Parameters:
        nRow - The number of rows contained in all right and this column group.
        nCol - The number of columns to shift the right hand side column groups over when combining, this should only effect the column indexes
        right - The right hand side column groups to combine. NOTE only the index offset of the second nested list should be used. The reason for providing this nested list is to avoid redundant allocations in calling methods.
        Returns:
        A combined compressed column group of the same type as this!.

      • combineWithSameIndex

        public AColGroup combineWithSameIndex​(int nRow,
                                      int nCol,
                                      AColGroup right)
        Description copied from class: AColGroup
        C bind the given column group to this.
        Overrides:
        combineWithSameIndex in class AColGroup
        Parameters:
        nRow - The number of rows contained in the right and this column group.
        nCol - The number of columns in this.
        right - The column group to c-bind.
        Returns:
        a new combined column groups.

      • splitReshape

        public AColGroup[] splitReshape​(int multiplier,
                                int nRow,
                                int nColOrg)
        Description copied from class: AColGroup
        This method returns a list of column groups that are naive splits of this column group as if it is reshaped. This means the column groups rows are split into x number of other column groups where x is the multiplier. The indexes are assigned round robbin to each of the output groups, meaning the first index is assigned. If for instance the 4. column group is split by a 2 multiplier and there was 5 columns in total originally. The output becomes 2 column groups at column index 4 and one at 9. If possible the split column groups should reuse pointers back to the original dictionaries!
        Specified by:
        splitReshape in class AColGroup
        Parameters:
        multiplier - The number of column groups to split into
        nRow - The number of rows in this column group in case the underlying column group does not know
        nColOrg - The number of overall columns in the host CompressedMatrixBlock.
        Returns:
        a list of split column groups