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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12356) CPU usage statistics on Windows
Date Thu, 17 Dec 2015 22:26:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15062967#comment-15062967
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Chris Nauroth commented on HADOOP-12356:
----------------------------------------

bq. I'm fine with the change of NodeResourceMonitorImpl if SysInfoWindows/Linux both normalized
usage to 0-100%.

Am I right in thinking that {{NodeResourceMonitorImpl}} is the only caller of {{SysInfo#getCpuUsage}}
(aside from test code)?  If so, then {{SysInfo}} would be normalizing to [0, 100], only to
have {{NodeResourceMonitorImpl}} immediately reverse the operation and change it back to core
units.  Would it be more helpful for {{SysInfo}} to return in core units in the first place?

> CPU usage statistics on Windows
> -------------------------------
>
>                 Key: HADOOP-12356
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12356
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>         Environment: CPU: Intel Xeon
> OS: Windows server
>            Reporter: Yunqi Zhang
>            Assignee: Inigo Goiri
>              Labels: easyfix, newbie, patch
>         Attachments: 0001-Correct-the-CPU-usage-calcualtion.patch, 0001-Correct-the-CPU-usage-calcualtion.patch,
HADOOP-12356-v3.patch, HADOOP-12356-v4.patch
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> The CPU usage information on Windows is computed incorrectly. The proposed patch fixes
the issue, and unifies the the interface with Linux.



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