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sourcestats: report asymmetry in statistics log

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This commit is contained in:
Miroslav Lichvar 2016-08-10 16:17:51 +02:00
parent 39f34eb674
commit e488371b01
2 changed files with 13 additions and 11 deletions
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9
doc/chrony.conf.adoc
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@ -1485,8 +1485,8 @@ _statistics.log_. An example line (which actually appears as a single line in
the file) from the log file is shown below.
+
----
2015-07-22 05:40:50 203.0.113.15 6.261e-03 -3.247e-03 \
2.220e-03 1.874e-06 1.080e-06 7.8e-02 16 0 8
2016-08-10 05:40:50 203.0.113.15 6.261e-03 -3.247e-03 \
2.220e-03 1.874e-06 1.080e-06 7.8e-02 16 0 8 0.00
----
+
The columns are as follows (the quantities in square brackets are the values
@ -1521,6 +1521,11 @@ from the example line above):
to be discarded. The number of runs for the data that is being retained is
tabulated. Values of approximately half the number of samples are expected.
[8]
. The estimated asymmetry of network jitter on the path to the source which was
used to correct the measured offsets. The asymmetry can be between -0.5 and
0.5. A negative value means the delay of packets sent to the source is
more variable than the delay of packets sent from the source back. [0.00,
i.e. no correction for asymmetry]
+
*tracking*:::
This option logs changes to the estimate of the system's gain or loss rate, and

15
sourcestats.c
View file

@ -181,7 +181,7 @@ void
SST_Initialise(void)
{
logfileid = CNF_GetLogStatistics() ? LOG_FileOpen("statistics",
" Date (UTC) Time IP Address Std dev'n Est offset Offset sd Diff freq Est skew Stress Ns Bs Nr")
" Date (UTC) Time IP Address Std dev'n Est offset Offset sd Diff freq Est skew Stress Ns Bs Nr Asym")
: -1;
}
@ -552,17 +552,14 @@ SST_DoNewRegression(SST_Stats inst)
inst->asymmetry, inst->asymmetry_run);
if (logfileid != -1) {
LOG_FileWrite(logfileid, "%s %-15s %10.3e %10.3e %10.3e %10.3e %10.3e %7.1e %3d %3d %3d",
LOG_FileWrite(logfileid, "%s %-15s %10.3e %10.3e %10.3e %10.3e %10.3e %7.1e %3d %3d %3d %5.2f",
UTI_TimeToLogForm(inst->offset_time.tv_sec),
inst->ip_addr ? UTI_IPToString(inst->ip_addr) : UTI_RefidToString(inst->refid),
sqrt(inst->variance),
inst->estimated_offset,
inst->estimated_offset_sd,
inst->estimated_frequency,
inst->skew,
stress,
inst->n_samples,
best_start, nruns);
inst->estimated_offset, inst->estimated_offset_sd,
inst->estimated_frequency, inst->skew, stress,
inst->n_samples, best_start, inst->nruns,
inst->asymmetry);
}
times_back_start = inst->runs_samples + best_start;