pmnameall(3) — Linux manual page

PMNAMEALL(3)            Library Functions Manual            PMNAMEALL(3)

NAME         top

       pmNameAll - translate a PMID to a set of performance metric names

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       int pmNameAll(pmID pmid, char ***nameset);

       cc ... -lpcp

DESCRIPTION         top

       Given a Performance Metric Identifier (PMID) via pmid, pmNameAll
       will determine all the corresponding metric names, if any, in the
       Performance Metrics Name Space (PMNS), and return these via
       nameset.

       The resulting list of pointers nameset and the values (the
       relative names) that the pointers reference will have been
       allocated by pmNameAll with a single call to malloc(3), and it is
       the responsibility of the pmNameAll caller to use free(nameset)
       to release the space when it is no longer required.

       In the absence of errors, pmNameAll returns the number of names
       in nameset.

       For many examples of a PMNS, there will be a 1:1 mapping between
       a name and a PMID, and under these circumstances, pmNameID(3)
       provides a slightly simpler interface in the absence of duplicate
       names for a particular PMID.

DIAGNOSTICS         top

       PM_ERR_NOPMNS
              Failed to access a PMNS for operation.  Note that if the
              application hasn't a priori called pmLoadNameSpace(3) and
              wants to use the distributed PMNS, then a call to
              pmNameAll must be made after the creation of a context
              (see pmNewContext(3)).

       PM_ERR_PMID
              pmid does not correspond to a defined PMID in the PMNS.

       PM_ERR_*
              Other diagnostics are for protocol failures when accessing
              the distributed PMNS.

SEE ALSO         top

       PMAPI(3), pmGetChildren(3), pmGetChildrenStatus(3),
       pmGetConfig(3), pmLoadASCIINameSpace(3), pmLoadNameSpace(3),
       pmLookupName(3), pmNameID(3), pmNewContext(3), pcp.conf(5),
       pcp.env(5) and PMNS(5).

COLOPHON         top

       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.
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Performance Co-Pilot               PCP                      PMNAMEALL(3)

Pages that refer to this page: pmdaname(3),  pmgetderivedcontrol(3),  pmnameid(3)

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