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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:
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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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