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NAME | C SYNOPSIS | Perl SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | COLOPHON |
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PMIGETHANDLE() PMIGETHANDLE()
pmiGetHandle - define a handle for a metric-instance pair
#include <pcp/pmapi.h>
#include <pcp/import.h>
int pmiGetHandle(const char *name, const char *instance);
cc ... -lpcp_import -lpcp
use PCP::LogImport;
$handle = pmiGetHandle($name, $instance);
As part of the Performance Co-Pilot Log Import API (see
LOGIMPORT(3)), pmiGetHandle creates a handle for a given metric
and instance. The handle is returned as the value from the
pmiGetHandle call and can be used in subsequent calls to
pmiPutValueHandle(3).
The metric's name should match one defined earlier in a call to
pmiAddMetric(3).
For singular metrics (those defined with an instance domain of
PM_INDOM_NULL), the instance should be NULL or an empty string,
otherwise instance should match the name of an instance defined
earlier in a call to pmiAddInstance(3) for the metric's instance
domain.
When combined with pmiPutValueHandle(3), the use of handles pro‐
vide a performance improvement over the alternative lookup for a
metric name and an instance name for each data value that is re‐
quired for pmiPutValue(3).
On failure pmiGetHandle returns a negative value that can be
turned into an error message by calling pmiErrStr(3).
LOGIMPORT(3), pmiAddInstance(3), pmiAddMetric(3), pmiErrStr(3) and
pmiPutValueHandle(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
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-08-11.) 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 PMIGETHANDLE()
Pages that refer to this page: logimport(3), pmiaddinstance(3), pmiputvaluehandle(3), pmistart(3)
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HTML rendering created 2025-09-06 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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