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https://issues.apache.org/jira/browse/SYSTEMML-1723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm closed SYSTEMML-1723.
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Resolution: Fixed
Assignee: Matthias Boehm
Fix Version/s: SystemML 1.0
> Parallel nnz recompute for all multi-threade convolution ops
> ------------------------------------------------------------
>
> Key: SYSTEMML-1723
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1723
> Project: SystemML
> Issue Type: Task
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 1.0
>
>
> All multi-threaded convolution operations currently make an additional pass
> over the output in order to {{recomputeNonZeros}}, which is a sequential
> operation. Since all convolution operations parallelize over rows (with
> guaranteed disjoint results), we should recompute the non zeros locally for
> each row partition and simply aggregate the final meta data.
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