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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2017/04/21 05:13:04 UTC
[jira] [Closed] (SYSTEMML-1550) Missing worst-cased estimates on
valid dimension/size checks
[ https://issues.apache.org/jira/browse/SYSTEMML-1550?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matthias Boehm closed SYSTEMML-1550.
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> Missing worst-cased estimates on valid dimension/size checks
> ------------------------------------------------------------
>
> Key: SYSTEMML-1550
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1550
> Project: SystemML
> Issue Type: Bug
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 1.0
>
>
> In addition to our traditional memory estimates (based on exact or worst-case dimensions and sparsity), operator selection also performs a check for valid integer dimensions and maximum dense size. However, this dimension/size check does not take worst-case estimates into account. Therefore, we currently compile unnecessary distributed operations for operations that produce ultra-sparse outputs without exactly known sparsity such as rexpand.
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