NAME

       genpmda - Performance Co-Pilot PMDA Generator

SYNOPSIS

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

DESCRIPTION

       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 below.

OPTIONS

       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 DSO)

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

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

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

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

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

       -v     print verbose messages about what genpmda is doing.

       Example:
           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 {
                metric
            }

            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
            }

PCP ENVIRONMENT

       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).

SEE ALSO

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

DIAGNOSTICS

       Many, but all are intended to be easily understood.