Matthias Boehm created SYSTEMML-2130: ----------------------------------------
Summary: Primitives to check the validity of sparse block representations Key: SYSTEMML-2130 URL: https://issues.apache.org/jira/browse/SYSTEMML-2130 Project: SystemML Issue Type: Task Reporter: Matthias Boehm This task aims to improve the debugging of our existing sparse block representations (MCSR, CSR, COO). We already have internal primitives such as {{ProgramBlock.checkSparsity}} and {{MatrixBlock.checkSparseRows}}, which are by default disabled but enabled on demand for debugging purposes. In detail, it would be useful to extend the {{SparseBlock}} abstraction by a method {{checkValidity(int rlen, int clen, boolean strict)}} in order to validate the correctness of the internal data structures of the different sparse block implementations. For example, for CSR this would entail checks for (1) correct meta data, (2) correct array lengths, (3) non-decreasing row pointers, (4) sorted column indexes per row, (5) non-existing zero values, and (6) a capacity that is no larger than nnz times resize factor. -- This message was sent by Atlassian JIRA (v7.6.3#76005)