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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2284) BasicTypeSorterBase.compare calls progress on each compare
Date Fri, 18 Jan 2008 06:45:34 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat updated HADOOP-2284:
-------------------------------

    Status: Patch Available  (was: Open)

Resubmitting for tests.

> BasicTypeSorterBase.compare calls progress on each compare
> ----------------------------------------------------------
>
>                 Key: HADOOP-2284
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2284
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Owen O'Malley
>            Assignee: Amar Kamat
>             Fix For: 0.16.0
>
>         Attachments: HADOOP-2284.patch
>
>
> The inner loop of the sort is calling progress on each compare. I think it would make
more sense to call progress in the sort rather than the compare or at most every 10000 compares.
In the performance numbers, the call to progress as part of the sort are consuming 12% of
the total cpu time when running word count under the local runner.

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