Idea: Add kernel PSI counters

[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 counters :)

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,

[sysstat]

Hi,
I actually had in mind to add these metrics to sar in a future sysstat version.
But please don't be in too much of a hurry as I don't have much time for this now.
Regards

[anayrat]

Well, don't worry, I opened the issue just to think about it :)
Thanks

[MrPippin66]

I concur I'd like to see this. Though relatively new a couple of years ago, this is now pretty much a standard function in all current Linux distributions.

I add my vote to including this.