cpu percent not showing up

[albertmichaelj]

Description

I am using the latest release of jupyter-resource-usage, and I have enabled c.ResourceUseDisplay.track_cpu_percent=true in my jupyter server config file. However, the CPU usage does not show up in the status bar. I am using JupyterLab 3.4.6, and I have the environmental variable CPU_LIMIT=2.0. My backend is Jupyter Server, not notebook. My understanding is that since release 0.6.1, this should show the CPU usage in the status bar besides the memory usage.

I have also tried launching the notebook with the --ResourceUseDisplay.track_cpu_percent=True command line flag, and there is no difference.

Is there something that I'm missing, or is this a bug with a newer version of Jupyter Lab?

Thank you.

Context

• Operating System and version: Linux (in a docker container) kernel 5.4, base container is ubuntu:22.04
• Browser and version: Chrome 105
• Jupyter Server version: 1.18.1

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[jtpio]

Thanks @albertmichaelj.

this should show the CPU usage in the status bar besides the memory usage.

I just checked the code and there is no plugin to add such functionality to the JupyterLab UI for now, only the memory usage:

jupyter-resource-usage/packages/labextension/src/index.ts

Line 16 in 799343d

id: '@jupyter-server/resource-usage:memory-status-item',

However it's used in the classic notebook interface, and also in this third-party extension: https://github.com/jtpio/jupyterlab-system-monitor

[albertmichaelj]

Ah, I misunderstood. I thought that it was supposed to show in the lab interface as well.

I have tried jupyterlab-system-monitor, but one of the issues I have with it is that it shows the memory usage in two places. Once in the top bar (like it is supposed to), and the other in the bottom status bar. The bottom display is actually directly from this extension, and it seems to be automatically enabled whenever jupyter-resource-usage is installed (which is a dependency of jupyterlab-system-monitor). So, I end up with the memory usage display twice, and there does not seem to be a way to disable the memory display in jupyter-resource-usage. Is there a way to directly disable the memory usage display for jupyter-resource-usage and just keep the metrics api so that jupyterlab-system-monitor can pull the data that it needs? As far as I can tell, there is no configurable to do this, but I could have missed something.

Feel free to close this issue as it seems to be a misunderstanding on what functionality is already in the extension.

[jtpio]

there does not seem to be a way to disable the memory display in jupyter-resource-usage

The plugin can be disabled with jupyter labextension disable @jupyter-server/resource-usage:memory-status-item.

Also there is an issue to track adding CPU usage to the JupyterLab extension: #84. So maybe we can close this issue in favor of #84 and continue the conversation there?

[albertmichaelj]

That disable command worked perfectly. Thanks for following up with that. I'm happy to close this in favor of #84. Thanks for your help!