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GENPMDA(1) General Commands Manual GENPMDA(1)


genpmda - Performance Co-Pilot PMDA Generator


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


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.


input config file, see example below
PMDA name IAM, should appear in stdpmid or the -D option must be used to specify a domain.
generate an Install script for a daemon PMDA (default is DSO)
use domain number in the generated pmns and domain.h (if -s is not given)
use pmns as root of the namespace (default matches -i flag)
use dir for generated source code, default ./generated
path to stdpmid (default ../../pmns/stdpmid)
use topdir in generated GNUmakefile, default ../../..
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 {

metric } example.metric {
## metric string
## indom PM_INDOM_NULL
## 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 }


Many, but all are intended to be easily understood.


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).


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

PCP Performance Co-Pilot