pmigethandle(3) — Linux manual page

PMIGETHANDLE()                                            PMIGETHANDLE()

NAME

       pmiGetHandle - define a handle for a metric-instance pair

C SYNOPSIS

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

       int pmiGetHandle(const char *name, const char *instance);

       cc ... -lpcp_import -lpcp

Perl SYNOPSIS

       use PCP::LogImport;

       $handle = pmiGetHandle($name, $instance);

DESCRIPTION

       As part of the Performance Co-Pilot Log Import API (see
       LOGIMPORT(3)), pmiGetHandle creates a handle for a given metric
       and instance.  The handle is returned as the value from the
       pmiGetHandle call and can be used in subsequent calls to
       pmiPutValueHandle(3).

       The metric's name should match one defined earlier in a call to
       pmiAddMetric(3).

       For singular metrics (those defined with an instance domain of
       PM_INDOM_NULL), the instance should be NULL or an empty string,
       otherwise instance should match the name of an instance defined
       earlier in a call to pmiAddInstance(3) for the metric's instance
       domain.

       When combined with pmiPutValueHandle(3), the use of handles
       provide a performance improvement over the alternative lookup for
       a metric name and an instance name for each data value that is
       required for pmiPutValue(3).

DIAGNOSTICS

       On failure pmiGetHandle returns a negative value that can be
       turned into an error message by calling pmiErrStr(3).

SEE ALSO

       LOGIMPORT(3), pmiAddInstance(3), pmiAddMetric(3), pmiErrStr(3)
       and pmiPutValueHandle(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            PMIGETHANDLE()

Pages that refer to this page: logimport(3), pmiaddinstance(3), pmiputvaluehandle(3), pmistart(3)

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