PMDASYSTEMTAP(1) Performance Co-Pilot PMDASYSTEMTAP(1)NAMEpmdasystemtap - Systemtap performance metrics domain agent (PMDA)
DESCRIPTIONpmdasystemtap is a Performance Metrics Domain Agent (PMDA) which
exports metric values from the Linux Systemtap dynamic tracing toolkit.
This implementation uses the stap(1) tool, which is a front-end to the
Systemtap toolkit.
INSTALLATION
In order to access performance data exported by Systemtap from with
PCP, it is necessary to perform two configuration steps:
1. Configure Systemtap probes, and verify them with stap(1). These
should be produced in a format that is easily parsed, and then
stored in the $PCP_PMDAS_DIR/systemtap/probes.stp file.
2. Configure pmdasystemtap to extract the values from the text
produced by stap. Two example probes are implemented in the
default systemtap PMDA script - readdir and sync traces (see
$PCP_PMDAS_DIR/systemtap/pmdasystemtap.pl for details).
# cd $PCP_PMDAS_DIR/systemtap
# [ edit probes.stp, test /usr/bin/stap probes.stp ]
# [ edit pmdasystemtap.pl ]
Once this is setup, you can access the names and values for the
systemtap performance metrics by doing the following as root:
# cd $PCP_PMDAS_DIR/systemtap
# ./Install
If you want to undo the installation, do the following as root:
# cd $PCP_PMDAS_DIR/systemtap
# ./Remove
pmdasystemtap is launched by pmcd(1) and should never be executed
directly. The Install and Remove scripts notify pmcd(1) when the agent
is installed or removed.
FILES
$PCP_PMDAS_DIR/systemtap/probes.stp
probe configuration file for stap(1), run by pmdasystemtap
$PCP_PMDAS_DIR/systemtap/Install
installation script for the pmdasystemtap agent
$PCP_PMDAS_DIR/systemtap/Remove
undo installation script for the pmdasystemtap agent
$PCP_LOG_DIR/pmcd/systemtap.log
default log file for error messages from pmdasystemtapSEE ALSOpmcd(1) and stap(1).
3.6.10 Performance Co-Pilot PMDASYSTEMTAP(1)
