genpmda(1) — Linux manual page


GENPMDA(1)               General Commands Manual              GENPMDA(1)

NAME         top

       genpmda - Performance Co-Pilot PMDA Generator

SYNOPSIS         top

       genpmda [-dv] [-D domain] [-n pmns] [-o dir] [-s stdpmid] [-t
       topdir] -c config -i IAM

DESCRIPTION         top

       genpmda is a rapid application development tool for creating new
       Performance Metrics Domain Agents, see PMDA(3).  It provides a
       very easy and efficient way to extend the Performance Co-pilot
       (PCP) with new performance metrics without needing to understand
       the low level details of how PMDAs are constructed.

       genpmda reads a config file containing an augmented Performance
       Metrics Name Space, see PMNS(5), and automatically generates
       virtually all of the source code to implement a fully functional
       PMDA, including the Makefile, name space, support scripts for
       configuring the new PMDA, and the metrics help text.  Fairly
       simple PMDAs can be automatically generated from the config file
       without writing any additional code.  More complicated PMDAs,
       e.g. containing multiple instance domains, require only the
       refresh methods for the instance domains to be written manually.

       An example of the config file format accepted by genpmda is given

OPTIONS         top

       Required options:

       -c config
            input config file, see example below

       -i IAM
            PMDA name IAM, should appear in stdpmid or the -D option
            must be used to specify a domain.

       Other options:

       -d   generate an Install script for a daemon PMDA (default is

       -D domain
            use domain number in the generated pmns and domain.h (if -s
            is not given)

       -n pmns
            use pmns as root of the namespace (default matches -i flag)

       -o dir
            use dir for generated source code, default ./generated

       -s stdpmid
            path to stdpmid (default ../../pmns/stdpmid)

       -t topdir
            use topdir in generated GNUmakefile, default ../../..

       -v   print verbose messages about what genpmda is doing.

           Generate an "example" PMDA using domain 99:

           genpmda -D 99 -v -i EXAMPLE -c example.conf

       Here is example.conf config file (for the required -c option):

            example {

            example.metric {
                ##  metric            string
                ##  pmid              EXAMPLE:CLUSTER:0
                ##  indom             PM_INDOM_NULL
                ##  type              PM_TYPE_STRING
                ##  units             PMDA_PMUNITS(0,0,0,0,0,0)
                ##  semantics         PM_SEM_DISCRETE
                ##  briefhelptext     one line help text for example.metric.string
                ##  helptext          long help text for example.metric.string
                ##  helptext          This is the second line of the long help text
                ##  helptext          and this is the third line.
                ##  fetch             function example_string_fetch_callback
                ##  code              atom->cp = "hello world";
                ##  code              return 1;
                ##  endmetric


       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

SEE ALSO         top

       pmcd(1), PMDA(3), pcp.conf(5), pcp.env(5) and PMNS(5).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this manual
       page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨⟩ on 2023-12-22.
       (At that time, the date of the most recent commit that was found
       in the repository was 2023-12-16.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot               PCP                        GENPMDA(1)