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pmdapmid(3) — Linux manual page

PMDAPMID(3) Library Functions Manual PMDAPMID(3)

NAME top

 pmdaPMID - translate a dynamic performance metric name into a PMID

C SYNOPSIS top

 #include <pcp/pmapi.h>
 #include <pcp/pmda.h>
 int pmdaPMID(char *name, pmID *pmid, pmdaExt *pmda);
 cc ... -lpcp_pmda -lpcp

DESCRIPTION top

 As part of the Performance Metrics Domain Agent (PMDA) API (see
 PMDA(3)), pmdaPMID is the generic callback for translating a dy‐
 namic metric name into a PMID (pmid).
 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), pmdaPMID
 is a skeleton implementation that returns PM_ERR_NAME.
 A PMDA that supports dynamic performance metrics will provide a
 private callback that replaces pmdaPMID (by assignment to ver‐
 sion.four.pmid of the pmdaInterface structure) and implements the
 translation from a dynamic performance metric name into the asso‐
 ciated pmid.

CAVEAT top

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

DIAGNOSTICS top

 pmdaPMID returns PM_ERR_NAME if the name is not recognized or can‐
 not be translated, else returns 0.

SEE ALSO top

 PMAPI(3), PMDA(3), pmdaDaemon(3), pmdaDSO(3), pmdaMain(3) and
 pmLookupName(3).

COLOPHON top

 This page is part of the PCP (Performance Co-Pilot) project. In‐
 formation 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
 2025年08月11日. (At that time, the date of the most recent commit
 that was found in the repository was 2025年08月11日.) 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 PMDAPMID(3)

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Pages that refer to this page: pmdamain(3)

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