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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (SYSTEMML-2017) Missing frame delete from buffer pool on rmvar, cpvar, etc
Date Thu, 30 Nov 2017 21:55:00 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-2017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias Boehm closed SYSTEMML-2017.
------------------------------------
       Resolution: Fixed
         Assignee: Matthias Boehm
    Fix Version/s: SystemML 1.0

> Missing frame delete from buffer pool on rmvar, cpvar, etc
> ----------------------------------------------------------
>
>                 Key: SYSTEMML-2017
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2017
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 1.0
>
>
> A recent scenario with frame appends and casts in loops revealed a hidden buffer issues
regarding frames. As it turned out, frames are never deleted on rmvar, cpvar or similar instructions
which leads to shrinking buffer pool size, unnecessary GC and unnecessary evictions. At script
level this issue manifests itself by fast early iterations, but a significant performance
hit as soon as the buffer pool size is reached.



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