contents of the standard logfile of 2023, June 7 from
           02:00 PM onwards interactively:
    
             **pcp atop -r 20230607 -b 14:00**
    
           To monitor the system load and write it to a file (in plain
           ASCII) with an interval of one minute during half an hour with
           active processes sorted on memory consumption:
    
             **pcp atop -M 60 30 > /log/pcp-atop.mem**
    

##  NOTES  top

    
    
           **pcp-atop** is based on the source code of the **atop**(1) command from
           _<https://atoptool.nl> _, maintained by Gerlof Langeveld
           (gerlof.langeveld@atoptool.nl), and aims to be command line and
           output compatible with it as much as possible.
    
           Some features of **pcp-atop**(such as reporting on the Apache HTTP
           daemon, Infiniband, NFS client mounts, hardware event counts, GPU
           statistics and per-process TCP and UDP statistics) are only
           activated if the corresonding PCP metrics are available. Refer to
           the documentation for [pmdaapache(1)](../man1/pmdaapache.1.html), **pmdainfiniband**(1),
           [pmdanfsclient(1)](../man1/pmdanfsclient.1.html), [pmdanvidia(1)](../man1/pmdanvidia.1.html), [pmdaperfevent(1)](../man1/pmdaperfevent.1.html) and [pmdabcc(1)](../man1/pmdabcc.1.html)
           for further details on activating these metrics.
    
           The semantics of the per-process network statistics deviate
           slightly from the **atop**(1) tool: instead of the number of TCP/UDP
           packets sent/received (which may be inaccurate due to TCP
           segmentation offload), **pcp-atop** shows the number of
           tcp_sendmsg()/udp_sendmsg()/etc. kernel calls per process.
    

##  FILES  top

    
    
           **/etc/atoprc**
                Configuration file containing system-wide default values.
                For further information about the default values, refer to
                the [pcp-atoprc(5)](../man5/pcp-atoprc.5.html) man page).
    
           **~/.atoprc**
                Configuration file containing personal default values.  For
                further information about the default values, refer to the
                [pcp-atoprc(5)](../man5/pcp-atoprc.5.html) man page).
    

##  PCP ENVIRONMENT  top

    
    
           Environment variables with the prefix **PCP_** are used to
           parameterize the file and directory names used by PCP.  On each
           installation, the file _/etc/pcp.conf_ contains the local values
           for these variables.  The **$PCP_CONF** variable may be used to
           specify an alternative configuration file, as described in
           [pcp.conf(5)](../man5/pcp.conf.5.html).
    
           For environment variables affecting PCP tools, see
           [pmGetOptions(3)](../man3/pmGetOptions.3.html).
    

##  SEE ALSO  top

    
    
           [PCPIntro(1)](../man1/PCPIntro.1.html), [pcp(1)](../man1/pcp.1.html), [pcp-atopsar(1)](../man1/pcp-atopsar.1.html), [pmdaapache(1)](../man1/pmdaapache.1.html), [pmdabcc(1)](../man1/pmdabcc.1.html),
           **pmdainfiniband**(1), [pmdanfsclient(1)](../man1/pmdanfsclient.1.html), [pmdanvidia(1)](../man1/pmdanvidia.1.html), [pmdaproc(1)](../man1/pmdaproc.1.html),
           [mkaf(1)](../man1/mkaf.1.html), [pmlogger(1)](../man1/pmlogger.1.html), [pmlogger_daily(1)](../man1/pmlogger_daily.1.html) and [pcp-atoprc(5)](../man5/pcp-atoprc.5.html).
    

##  COLOPHON  top

    
    
           This page is part of the _PCP_ (Performance Co-Pilot) project.
           Information about the project can be found at 
           â¨<http://www.pcp.io/>â©.  If you have a bug report for this manual
           page, send it to pcp@groups.io.  This page was obtained from the
           project's upstream Git repository
           â¨<https://github.com/performancecopilot/pcp.git>â© on 2023-12-22.
           (At that time, the date of the most recent commit that was found