pmsemstr(3) — Linux manual page


PMSEMSTR(3)             Library Functions Manual             PMSEMSTR(3)

NAME         top

       pmSemStr, pmSemStr_r - convert a performance metric semantic into
       a string

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       const char *pmSemStr(int sem);
       char *pmSemStr_r(int sem, char *buf, int buflen);

       cc ... -lpcp

DESCRIPTION         top

       Given a performance metric semantic, pmSemStr produces a terse
       ASCII equivalent, appropriate for use in error and diagnostic
       messages.  The pmSemStr_r function does the same, but stores the
       result in a user-supplied buffer buf of length buflen, which
       should have room for at least 20 bytes.

       The value for sem is typically extracted from a pmDesc structure,
       following a call to pmLookupDesc(3) for a particular performance

       Examples are counter (for sem equals PM_SEM_COUNTER), discrete
       (for sem equals PM_SEM_DISCRETE), instant (for sem equals
       PM_SEM_INSTANT), etc.

NOTES         top

       Both of these routines are safe to call from threaded

SEE ALSO         top

       PMAPI(3), pmAtomStr(3), pmConvScale(3), pmExtractValue(3),
       pmLookupDesc(3), pmPrintValue(3), pmIDStr(3), pmInDomStr(3),
       pmTypeStr(3) and pmUnitsStr(3).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
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       ⟨⟩ on 2023-12-22.
       (At that time, the date of the most recent commit that was found
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       (which is not part of the original manual page), send a mail to

Performance Co-Pilot               PCP                       PMSEMSTR(3)

Pages that refer to this page: pmidstr(3)pmindomstr(3)pmtypestr(3)pmunitsstr(3)pmwebapi(3)