NAME¶

pmdaresctrl - resctrl performance metrics domain agent (PMDA)

SYNOPSIS¶

$PCP_PMDAS_DIR/pmdaresctrl [-D debug] [-d domain] [-l logfile]

DESCRIPTION¶

pmdaresctrl is a resctrl Performance Metrics Domain Agent (PMDA) which exposes performance metrics values from the /sys/fs/resctrl interface to provide information on the last level cache.

Further details on linux support for last level cache metrics can be found at https://github.com/torvalds/linux/tree/master/Documentation/arch/x86/resctrl.rst.

INSTALLATION¶

If you want access to the names, help text and values for the resctrl performance metrics, do the following as root:

# cd $PCP_PMDAS_DIR/resctrl
# ./Install

If you want to undo the installation (and remove both PMDAs), do the following as root:

# cd $PCP_PMDAS_DIR/resctrl
# ./Remove

pmdaresctrl 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_PMCDCONF_PATH

command line options used to launch pmdaresctrl

$PCP_PMDAS_DIR/resctrl/help

default help text file for the resctrl metrics

$PCP_PMDAS_DIR/resctrl/Install

installation script for the pmdaresctrl agent

$PCP_PMDAS_DIR/resctrl/Remove

undo installation script for the pmdaresctrl agent

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). In particular, the $PCP_RESCTRL_DIR may be set to change the default directory from /sys/fs/resctrl.

DEBUGGING OPTIONS¶

The -D or --debug option enables the output of additional diagnostics on stderr to help triage problems, although the information is sometimes cryptic and primarily intended to provide guidance for developers rather than for end-users. debug is a comma separated list of debugging options; use pmdbg(1) with the -l option to obtain a list of the available debugging options and their meaning.

SEE ALSO¶

PCPIntro(1), pmcd(1), pcp.conf(5), pcp.env(5) and resctrl(1).