Idea: Add Kernel PSI insights

[anayrat]

Hi,

Since version 4.20, linux kernel can provide pressure-stall information that could be useful to provide performance information about CPU, IO and memory starvation.

It will be great to collect theses metrics :)

Here are some inputs:

• Tracking pressure-stall information
• Linux Pressure Stall Information (PSI) by Example
• Getting Started with PSI
• PSI - Pressure Stall Information - Kernel's documentation

Regards,

[anayrat]

FYI : sysstat's author planned to add theses counter : https://github.com/sysstat/sysstat/issues/233

[darold]

Good news, thanks for the suggestion Adrien, I will look at it.