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NAME | C SYNOPSIS | DESCRIPTION | ENVIRONMENT | SEE ALSO | COLOPHON |
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PMPRINTVALUE(3) Library Functions Manual PMPRINTVALUE(3)
pmPrintValue - print a performance metric value
#include <stdio.h>
#include <pcp/pmapi.h>
void pmPrintValue(FILE *f, int valfmt, int type,
const pmValue *val, int minwidth);
cc ... -lpcp
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 structure,
following a call to pmLookupDesc(3) for a particular performance
metric.
The output will be optionally padded to be at least minwidth char‐
acters 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).
Output of string metric values can be further controlled using
PCP_SQUASH_NEWLINES. When set in the environment of the calling
process, and the type is set to PM_TYPE_STRING or PM_TYPE_AGGRE‐
GATE, then the output value is guaranteed to be free of embedded
newline characters. If the given value contained such characters,
they will have been replaced by a space before being printed.
PMAPI(3), pmAtomStr(3), pmConvScale(3), pmExtractValue(3),
pmFetch(3), pmLookupDesc(3), pmTypeStr(3) and pmUnitsStr(3).
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
2025-02-02. (At that time, the date of the most recent commit
that was found in the repository was 2025-01-30.) 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 PMPRINTVALUE(3)
Pages that refer to this page: pmprobe(1), pmapi(3), pmatomstr(3), pmconvscale(3), pmextractvalue(3), pmsemstr(3), pmtypestr(3), pmunitsstr(3)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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