|
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. |
|
|
NAME | C SYNOPSIS | DESCRIPTION | SEE ALSO | COLOPHON |
|
|
|
MMV_SET_VALUE(3) Library Functions Manual MMV_SET_VALUE(3)
mmv_set, mmv_set_value, mmv_set_atomvalue - set a value in a
Memory Mapped Value file
#include <pcp/pmapi.h>
#include <pcp/mmv_stats.h>
void mmv_set(void *addr, pmAtomValue *av, void *val);
void mmv_set_value(void *addr, pmAtomValue *av, double val);
void mmv_set_atomvalue(void *addr, pmAtomValue *av, pmAtomValue
*val);
cc ... -lpcp_mmv -lpcp
mmv_set, mmv_set_value and mmv_set_atomvalue provide convenient
ways of directly setting a value for a metric av previously
returned by the mmv_lookup_value_desc(3) interface. addr is the
address returned from mmv_stats_init(3).
These interfaces are typically used with instantaneous and
discrete metrics. Refer to mmv_inc_value(3) for a mechanism
suited to monotonic increasing counter metrics.
With mmv_set and mmv_set_atomvalue the value provided via the val
pointer must match the type of the metric and will be used as the
new value of the metric.
In the case of mmv_set and mmv_set_value, the pointer value val
is internally cast to match the type of the metric and then used
as the value for the metric.
mmv_inc_value(3), mmv_stats_init(3), mmv_lookup_value_desc(3) and
mmv(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 MMV_SET_VALUE(3)
Pages that refer to this page: mmv_inc_value(3)
|
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. |
|