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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SYSTEMML-2034) Performance issue sparse-dense maxpooling backward
Date Fri, 01 Dec 2017 08:25:01 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-2034?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias Boehm updated SYSTEMML-2034:
-------------------------------------
    Priority: Blocker  (was: Major)

> Performance issue sparse-dense maxpooling backward
> --------------------------------------------------
>
>                 Key: SYSTEMML-2034
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2034
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Matthias Boehm
>            Priority: Blocker
>
> The current implementation of sparse-dense maxpooling_backward uses for every p-q combination
a full scan over the sparse row just to find the applicable range. We should instead flip
this dense implementation to a "real" sparse implementation that scans the sparse input just
once.



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