[SYSTEMDS-2038] Dense-sparse block conversions into memory-efficient CSR

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: SystemML 1.0.0
• Assignee: Matthias Boehm
• Reporter: Matthias Boehm
• Created: 07/Dec/17 04:05
• Updated: 30/Dec/17 02:28
• Resolved: 09/Dec/17 01:35

Description

The sparse-dense matrix block conversion currently allocates the output in the default sparse representation, which is MCSR. However, this primitive knows the number of non-zeros upfront and hence can produce the output in CSR which is much more memory efficient.

Issue Links

• is related to: SYSTEMDS-2053 Dense-sparse conversion to CSR might overrun max number of nnz