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https://issues.apache.org/jira/browse/SYSTEMML-1547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm resolved SYSTEMML-1547.
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Resolution: Done
Assignee: Matthias Boehm
Fix Version/s: SystemML 0.14
> Cache-conscious post processing tsmm
> ------------------------------------
>
> Key: SYSTEMML-1547
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1547
> Project: SystemML
> Issue Type: Task
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 0.14
>
>
> For scenarios like tsmm outer products t(X) %*% X, where X is a row vector,
> the post-processing in terms of (1) copying the upper to lower triangle, and
> (2) nnz recomputation significantly contribute to the execution time.
> This task aims at a cache-conscious copy of upper to lower triangles similar
> to dense-dense transpose as well as fusing the nnz recompuation into either
> the computation or copy operation.
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