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NAME | C SYNOPSIS | DESCRIPTION | RETURNS | SEE ALSO | COLOPHON |
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MMV_LOOKUP_VALUE_DESC(3) Library Functions ManualMMV_LOOKUP_VALUE_DESC(3)
mmv_lookup_value_desc - find a value in the Memory Mapped Value
file
#include <pcp/pmapi.h>
#include <pcp/mmv_stats.h>
pmAtomValue *mmv_lookup_value_desc(void *addr, const char *metric,
const char *inst);
cc ... -lpcp_mmv -lpcp
mmv_lookup_value_desc searches for the value of the instance iden‐
tified by the external instance name inst of the metric metric in
the MMV(5) file. addr is the address returned from
mmv_stats_init().
The pointer returned points to a pmAtomValue union, which is de‐
fined as follows:
typedef union {
__int32_t l; /* 32-bit signed */
__uint32_t ul; /* 32-bit unsigned */
__int64_t ll; /* 64-bit signed */
__uint64_t ull; /* 64-bit unsigned */
float f; /* 32-bit floating point */
double d; /* 64-bit floating point */
char *cp; /* char ptr */
pmValueBlock *vbp; /* pmValueBlock ptr */
} pmAtomValue;
MMV string values should be set using either of the mmv_set_string
or mmv_set_strlen routines.
The function returns the address inside of the memory mapped re‐
gion on success or NULL on failure.
mmv_stats_init(3), mmv_inc_value(3) and mmv(5).
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 MMV_LOOKUP_VALUE_DESC(3)
Pages that refer to this page: mmv_inc_value(3), mmv_set_value(3), mmv_stats_init(3), mmv_stats_registry(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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