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NAME | C SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | COLOPHON |
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PMDERIVEDCONTROL(3) Library Functions Manual PMDERIVEDCONTROL(3)
pmGetDerivedControl, pmSetDerivedControl - get and set controls
for derived metrics
#include <pcp/pmapi.h>
int pmGetDerivedControl(int what, int *valuep);
int pmSetDerivedControl(int what, int value);
cc ... -lpcp
These routines may be used to influence the behaviour of the
derived metric services that are activated for global derived
metrics using pmRegisterDerived(3), pmRegisterDerivedMetric(3)
and pmLoadDerivedConfig(3), or per-context derived metrics using
pmAddDerived(3) and pmAddDerivedMetric(3).
The what argument selects a control, the value argument provides
a value for pmSetDerivedControl and the valuep argument is used
to return the value for pmGetDerivedControl.
The what argument has one of the following values:
PCP_DERIVED_GLOBAL_LIMIT
The maximum number of global derived metrics that may be
defined. The value -1 indicates no limit.
PCP_DERIVED_CONTEXT_LIMIT
The maximum number of per-context derived metrics that may
be defined. The value -1 indicates no limit.
PCP_DERIVED_DEBUG_SYNTAX
Debug diagnostics during parsing of derived metric
expression. The value 1 enables the diagnostics, the
value 0 disables them.
PCP_DERIVED_DEBUG_SEMANTICS
Debug diagnostics for semantic checks during the binding
of metrics in the derived metric expression to the
available metrics in a new PMAPI context. The value 1
enables the diagnostics, the value 0 disables them.
PCP_DERIVED_DEBUG_EVAL
Debug diagnostics when derived metrics are used in PMAPI
operations like pmFetch(3), pmGetChildren(3),
pmGetChildrenStatus(3), pmLookupDesc(3), pmLookupName(3),
pmNameAll(3), pmNameID(3) and pmTraversePMNS(3).
Both routines return 0 on success, else a value less than 0 that
can be decoded using pmErrStr(3).
PCPIntro(1), pmAddDerived(3), pmAddDerivedMetric(3), PMAPI(3),
pmErrStr(3), pmLoadDerivedConfig(3), pmRegisterDerived(3),
pmRegisterDerivedMetric(3) and PMNS(5).
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 [email protected]. 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
[email protected]
Performance Co-Pilot PMDERIVEDCONTROL(3)
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HTML rendering created 2024-06-26 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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