pmprintvalue(3) — Linux manual page


PMPRINTVALUE(3)         Library Functions Manual         PMPRINTVALUE(3)

NAME         top

       pmPrintValue - print a performance metric value

C SYNOPSIS         top

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

       void pmPrintValue(FILE *f, int valfmt, int type,
               const pmValue *val, int minwidth);

       cc ... -lpcp

DESCRIPTION         top

       The  value  of a single performance metric (as identified by val)
       is printed on the standard I/O stream identified by f.

       The value of the performance metric is interpreted  according  to
       the  format of val as defined by valfmt (from a pmValueSet within
       a pmResult structure; see pmFetch(3)) and the generic description
       of the metrics type passed in via type.

       The value for type is typically extracted from  a  pmDesc  struc‐
       ture,  following  a call to pmLookupDesc(3) for a particular per‐
       formance metric.

       The output will be optionally padded  to  be  at  least  minwidth
       characters wide.

       pmPrintValue  is most useful for displaying values of performance
       metrics from pmFetch(3) (which returns a set of  valfmt  and  val
       pairs  for each requested metric), based upon the metrics type as
       returned from pmLookupDesc(3).

SEE ALSO         top

       PMAPI(3),   pmAtomStr(3),   pmConvScale(3),    pmExtractValue(3),
       pmFetch(3), pmLookupDesc(3), pmTypeStr(3) and pmUnitsStr(3).

COLOPHON         top

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Performance Co-Pilot               PCP                   PMPRINTVALUE(3)

Pages that refer to this page: pmprobe(1)pmapi(3)pmatomstr(3)pmconvscale(3)pmextractvalue(3)pmsemstr(3)pmtypestr(3)pmunitsstr(3)