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NAME | C SYNOPSIS | CAVEAT | DESCRIPTION | SEE ALSO | COLOPHON |
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PMASAMEINDOM(3) Library Functions Manual PMASAMEINDOM(3)
pmaSameInDom - check if two observations of an instance domain are
the same`
#include <pcp/pmapi.h>
#include <pcp/libpcp.h>
#include <pcp/archive.h>
int pmaSameInDom(__pmLogInDom *old, __pmLogInDom *new);
cc ... -lpcp_archive -lpcp
This documentation is intended for internal Performance Co-Pilot
(PCP) developer use.
These interfaces are not part of the PCP APIs that are guaranteed
to remain fixed across releases, and they may not work, or may
provide different semantics at some point in the future.
Checks two observations of the same instance domain are identical.
The code assumes (a) old->indom == new->indom and (b) both the in‐
stance domains are sorted in ascending internal instance identifi‐
er sequence; see pmaSortInDom(3) to see how to make the second
condition true.
pmaSameInDom returns 1 if they are the same, returns 0 otherwise.
The instance domains are considered different if any of the fol‐
lowing hold:
1. old->numinst != new->numinst
2. For some i, old->instlist[i] != new->instlist[i]
3. For some i, the strings pointed to by old->namelist[i] and
new->instlist[i] are not identical
For Version 3 archives with "delta indom" support, it is more
likely that pmaDeltaInDom(3) is more useful than pmaSameInDom, as
the former combines the check for two observations of an instance
domain being the same with the optional creation of the "delta in‐
dom" format if that is the most efficient encoding.
pmaDeltaInDom(3), PMAPI(3) and pmaSortInDom(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 PCP PMASAMEINDOM(3)
Pages that refer to this page: pmadeltaindom(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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