genpmda - Online in the Cloud

PROGRAM:

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).

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