Change in libosmocore[master]: stats: Ensure that each osmo_stat_item only reports once per interval

[daniel]

Hello Jenkins Builder, laforge, pespin, lynxis lazus, dexter, 

I'd like you to reexamine a change. Please visit

    https://gerrit.osmocom.org/c/libosmocore/+/23167

to look at the new patch set (#3).

Change subject: stats: Ensure that each osmo_stat_item only reports once per interval
......................................................................

stats: Ensure that each osmo_stat_item only reports once per interval

We should never report multiple values for a metric. It is confusing for
the log reporter and wrong for statsd. Statsd will record only one value,
but will it be the first, last, ...?
This can happen if an osmo_stat_item changes more than once within the
same reporting interval.

With this patch only one aggregate value is sent to the log reporters.
The value reported is the maximum during this interval. Other
aggregations could be possible (min, last), but reporting a (useful)
average is not because the values don't include a timestamp and most
osmo_stat_items change at unregular intervals.

Change-Id: I366ab1c66f4ae6363111ea4e41b66b7d5bcade9c
Related: SYS#4877
---
M src/stats.c
M tests/stats/stats_test.c
M tests/stats/stats_test.ok
3 files changed, 38 insertions(+), 18 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/67/23167/3
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: I366ab1c66f4ae6363111ea4e41b66b7d5bcade9c
Gerrit-Change-Number: 23167
Gerrit-PatchSet: 3
Gerrit-Owner: daniel <dwillmann at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: dexter <pmaier at sysmocom.de>
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-Reviewer: lynxis lazus <lynxis at fe80.eu>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-CC: fixeria <vyanitskiy at sysmocom.de>
Gerrit-MessageType: newpatchset
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