pmdaname(3) — Linux manual page

PMDANAME(3)             Library Functions Manual             PMDANAME(3)

NAME

       pmdaName - translate a PMID to a set of dynamic performance
       metric names

C SYNOPSIS

       #include <pcp/pmapi.h>
       #include <pcp/pmda.h>

       int pmdaName(pmID pmid, char ***nameset, pmdaExt *pmda);

       cc ... -lpcp_pmda -lpcp

DESCRIPTION

       As part of the Performance Metrics Domain Agent (PMDA) API (see
       PMDA(3)), pmdaName is the generic callback for translating a pmid
       into one or more dynamic metric names (nameset).

       Because implementing dynamic performance metrics requires
       specific PMDA support, and the facility is an optional component
       of a PMDA (most PMDAs do not support dynamic performance
       metrics), pmdaName is a skeleton implementation that returns
       PM_ERR_NAME.

       A PMDA that supports dynamic performance metrics will provide a
       private callback that replaces pmdaName (by assignment to
       version.four.name of the pmdaInterface structure) and implements
       the translation from a pmid to a set of dynamic performance
       metric names returned via nameset.  The behaviour, return values
       and memory allocation rules for nameset are the same as for
       pmNameAll(3).

CAVEAT

       The PMDA must be using PMDA_INTERFACE_4 or later, as specified in
       the call to pmdaDSO(3) or pmdaDaemon(3).

DIAGNOSTICS

       pmdaName returns PM_ERR_PMID if the name is not recognized or
       cannot be translated, otherwise the number of metric names found
       (most commonly 1).

SEE ALSO

       PMAPI(3), PMDA(3), pmdaDaemon(3), pmdaDSO(3), pmdaMain(3),
       pmNameAll(3) and pmNameID(3).

COLOPHON

       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 pcp@groups.io.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
       (At that time, the date of the most recent commit that was found
       in the repository was 2024-06-14.)  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
       man-pages@man7.org

Performance Co-Pilot               PCP                       PMDANAME(3)

Pages that refer to this page: pmdamain(3)

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