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From "Glenn Weidner (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SYSTEMML-1593) Performance issues rexpand to ultra-sparse matrix
Date Sat, 09 Sep 2017 01:14:00 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-1593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Glenn Weidner updated SYSTEMML-1593:
------------------------------------
    Fix Version/s:     (was: SystemML 1.0)
                   SystemML 0.15

> Performance issues rexpand to ultra-sparse matrix
> -------------------------------------------------
>
>                 Key: SYSTEMML-1593
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1593
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 0.15
>
>
> For a detailed description see https://www.mail-archive.com/dev@systemml.incubator.apache.org/msg01741.html
> The issue is caused by (1) wrong input partitioning (small vector input to huge output
only leverages a small degree of parallelism), and (2) unnecessary shuffle. 



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