PMDANAME(3)               Library Functions Manual               PMDANAME(3)

NAME         top

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

C SYNOPSIS         top

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

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

       cc ... -lpcp_pmda -lpcp

DESCRIPTION         top

       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 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).

DIAGNOSTICS         top

       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).

CAVEAT         top

       The PMDA must be using PMDA_PROTOCOL_4 or later, as specified in the
       call to pmdaDSO(3) or pmdaDaemon(3).

SEE ALSO         top

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

COLOPHON         top

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Performance Co-Pilot                 PCP                         PMDANAME(3)

Pages that refer to this page: pmdamain(3)