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ui: cluster viz: normalize CPU % to 0-100 by # cores #28724

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vilterp opened this issue Aug 16, 2018 · 4 comments

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@vilterp
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commented Aug 16, 2018

As of #28596, the CPU graph on the Hardware dashboard is normalized by the number of cores so that it's always between 0 and 100%. However, the cluster viz can still show CPU percentages above 100%. It should be normalized as well.

In this widget:
image

Note: this is not simply an average, since it needs to be weighted by the number of cores in each node.

@vilterp vilterp added this to Sprint: Todo in Web UI Aug 30, 2018

@vilterp vilterp added this to the 2.1 milestone Oct 2, 2018

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commented Oct 17, 2018

@Amruta-Ranade we didn't get to this, and it's confusing… Probably should document as a known limitation?

@Amruta-Ranade

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commented Oct 17, 2018

Yup..Opening a docs issue to track this.

@sploiselle

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commented Oct 24, 2018

@vilterp Can I get a quick blurb describing this known limitation w/r/t the impact to user experience? Ideally, we need it by Friday 10/26 for the 2.1 Known Limitations page. Posting it on this issue and/or pinging me would be great.

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commented Oct 24, 2018

Here's the blurb from the UI doc:
+++
For multi-core systems, the user CPU percent can be greater than 100%. Full utilization of one core is considered as 100% CPU usage. If you have n cores, then the user CPU percent can range from 0% (indicating an idle system) to (n*100)% (indicating full utilization).
+++

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