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
Required options:-c config
input config file, see example below
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)
use domain number in the generated pmns and domain.h (if -s is
use pmns as root of the namespace (default matches -i flag)
use dir for generated source code, default ./generated-s stdpmid
path to stdpmid (default ../../pmns/stdpmid)
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):
## 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;
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).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at ⟨http://www.pcp.io/⟩.
If you have a bug report for this manual page, send it to
email@example.com. This page was obtained from the project's upstream
Git repository ⟨https://github.com/performancecopilot/pcp.git⟩ on
2020-07-14. (At that time, the date of the most recent commit that
was found in the repository was 2020-07-14.) 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)