PMTRACE(1)                 General Commands Manual                PMTRACE(1)

NAME         top

       pmtrace - command line performance instrumentation

SYNOPSIS         top

       pmtrace [-q] [-c value | -e command | -v value] [-h host] [-S state]

DESCRIPTION         top

       pmtrace provides a simple command line interface to the trace
       Performance Metrics Domain Agent (PMDA) and the associated pcp_trace

       The default pmtrace behavior is to provide point trace data to the
       trace PMDA, using the tag argument as the identifying name associated
       with each trace point.  The tag then becomes an instance identifier
       within the set of trace.point metrics.

       The -e option allows an arbitrary command to be executed.  This
       command will be measured as a transaction since it has well defined
       start and end points.  The information is made available through the
       trace.transact metrics.

       Trace data can be sent to the trace PMDA running on host, rather than
       the localhost, using the -h option.  This overrides use of the
       environment variable PCP_TRACE_HOST.

       The -q option suppresses messages from a successful trace, so that
       pmtrace runs quietly.

       The -c option allows an arbitrary counter value to be exported
       through the trace.count metrics, while the -v option allows an
       arbitrary floating point value to be exported through the
       trace.observe metrics

       The -S option enables internal debugging and tracing.  The value of
       state is a bit-wise combination of debug flags as defined in
       pmtracestate(3), and may be specified using the decimal or
       hexadecimal syntax prescribed by strtol(3).

ENVIRONMENT         top

       Since pmtrace uses the libpcp_trace library routines, the environment
       all honored.  Refer to pmdatrace(3) for a detailed description of the
       semantics of each.

FILES         top

                 source code for pmtrace


       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).

SEE ALSO         top

       pmcd(1), pmdatrace(1), pmprobe(1), PMAPI(3), and pmdatrace(3).

DIAGNOSTICS         top

       All are generated on standard error and are intended to be self-

       The pmtrace exit status is always zero except when the -e option is
       in use, in which case the exit status of command is returned.

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨git://⟩ on 2017-03-13.  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

Performance Co-Pilot                 PCP                          PMTRACE(1)