QmcDesc(3) — Linux manual page

QMCDESC(3)              Library Functions Manual              QMCDESC(3)

NAME

       QmcDesc - container for a metric description

C++ SYNOPSIS

       #include <QmcDesc.h>

       c++ ... -lpcp_qmc -lpcp

DESCRIPTION

       A QmcDesc object is a container for a metric descriptor (pmDesc,
       see PMAPI(3)) and units.

CONSTRUCTORS & DESTRUCTOR

       ~QmcDesc();
           Destructor.

       QmcDesc(pmID pmid);
           Construct a container for the descriptor for pmid.  The
           descriptor is obtained from the current PMAPI(3) context
           using pmLookupDesc(3).

DESCRIPTION

       int status() const;
           A status less than zero indicates that the descriptor could
           not be obtained, the PMAPI(3) error is encoded in the result.

       pmID id() const;
           Return the pmID for this descriptor.

       pmDesc desc() const;
           Return a copy of the actual metric descriptor.

       const pmDesc *descPtr() const;
           Return a pointer to the actual descriptor to avoid using a
           pointer to a temporary.

UNITS

       const QString &units() const;
           The complete unit string for this descriptor.

       const QString &shortUnits() const;
           The unit string using abbreviations.

       bool useScaleUnits() const;
           Returns true if the units have been set by a call to
           QmcDesc::setScaleUnits.

       const pmUnits &scaleUnits() const;
           Return the scaling units for this descriptor.

       void setScaleUnits(const pmUnits &units);
           Set the scaling units for this descriptor.

DIAGNOSTICS

       Error messages are generated using pmprintf(3) but are not
       flushed. It is the responsibility of the user to call pmflush(3)
       to output any messages.

       Additional diagnostics may be activated by adding the option pmc
       to the global debugging specification, as described in
       pmSetDebug(3).

SEE ALSO

       PMAPI(3), QMC(3), pmflush(3), pmLookupDesc(3) and pmprintf(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
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       ⟨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
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Performance Co-Pilot               SGI                        QMCDESC(3)

Pages that refer to this page: QMC(3), QmcContext(3), QmcIndom(3)

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