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Description of problem:

The pcp atop miss one crucial feature in terms of support engineer's perspective and that is we can not list the processes according to its state. For example, if we want to see processes that are stuck in D state. 

Version-Release number of selected component (if applicable):

pcp-4.3.0-3.el8.x86_64

How reproducible:


Steps to Reproduce:
1. run pcp atop
2. there is no switch to sort the processes according to their state
3.

Actual results:

You can not sort the processes according to their state in atop. At least the man page of atop does not talk of such a flag. 

Expected results:

Being support engineers we rely heavily on sorting the processes according to their state. For example - what was the top 10 D state processes. 


Additional info:

I am sure there will be some other way to get this info but it will be great if the atop provides such a flag. 

As of now, I do not see any specific matric on default pcp-zeroconf installation which will collect the process states related information.

Hi Yogesh,

Indeed there is no such flag, as you found.  I think what you may want here is a filter on state (which also does not yet exist), so that only processes matching certain state(s) would be shown?  Perhaps something like the interactive 'S' key, except for process states.

I'm not sure how it would work otherwise - there's only 5 or so process states, so 'sorting' on that column would end up being pretty arbitrary (compare this to sorting on numeric values like memory use, CPU utilization, etc which are good sort keys for common process counts because there's a clear linear progression, eg from 0 to 100%).

I've implemented something like #c1 - a comma-separated list of states can now be filtered on.

Upstream atop pull request is:  https://github.com/Atoptool/atop/pull/151

I'll see if Gerlof (original atop author) has any reservations and if not, will add to pcp-atop.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (pcp bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:4171