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pmaundeltaindom(3) — Linux manual page

NAME | C SYNOPSIS | CAVEAT | DESCRIPTION | DIAGNOSTICS AND RETURN VALUES | SEE ALSO | COLOPHON 

PMAUNDELTAINDOM(3)       Library Functions Manual      PMAUNDELTAINDOM(3)

NAME         top

       pmaUndeltaInDom - find ``full'' instance domain matching a
       ``delta'' instance domain

C SYNOPSIS         top

       #include <pcp/pmapi.h>
       #include <pcp/libpcp.h>
       #include <pcp/archive.h>

       __pmLogInDom *pmaUndeltaInDom(__pmLogCtl *lcp, __int32_t *buf);

       cc ... -lpcp_archive -lpcp

CAVEAT         top

       This  documentation  is intended for internal Performance Co-Pilot
       (PCP) developer use.

       These interfaces are not part of the PCP APIs that are  guaranteed
       to  remain  fixed  across  releases, and they may not work, or may
       provide different semantics at some point in the future.

DESCRIPTION         top

       Find the loaded ``full'' instance domain that matches a  ``delta''
       instance domain.

       The  caller ensures the physical metadata record for the ``delta''
       instance domain has been read into buf.   The  associated  archive
       control  structure  is  identified by lcp, which implies the input
       archive has also been opened with pmNewContext(3).

       pmaUndeltaInDom starts by extracting the  timestamp  and  the  in‐
       stance  domain  number for the ``delta'' instance domain from buf.
       With this information, __pmLogSearchInDom(3) is called to find the
       matching loaded instance domain, which will  have  been  converted
       from  a ``delta'' instance domain to a ``full'' instance domain in
       the process.

       pmaUndeltaInDom is most useful for applications that read physical
       metadata records and need to operate on ``full'' instance domains,
       rather than the ``delta'' instance domains that occur in Version 3
       archives.

DIAGNOSTICS AND RETURN VALUES         top

       Lots of warning babble if the matching loaded instance domain can‐
       not be found, and the return value is NULL in this case.

SEE ALSO         top

       PMAPI(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
       2025-08-11.  (At that time, the date of  the  most  recent  commit
       that was found in the repository was 2025-08-11.)  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                 PMAUNDELTAINDOM(3)

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