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cleanup(userspace): adjust stats n_drops_perc

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Signed-off-by: Melissa Kilby <melissa.kilby.oss@gmail.com>
This commit is contained in:
Melissa Kilby 2023-05-30 17:24:36 +00:00 committed by poiana
parent efd0c7421e
commit aa8c13b4e4
1 changed files with 18 additions and 12 deletions
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30
userspace/falco/stats_writer.cpp
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@ -319,6 +319,8 @@ void stats_writer::collector::get_metrics_output_fields_additional(
/* Cache n_evts and n_drops to derive n_drops_perc. */
uint64_t n_evts = 0;
uint64_t n_drops = 0;
uint64_t n_evts_delta = 0;
uint64_t n_drops_delta = 0;
for(uint32_t stat = 0; stat < nstats; stat++)
{
// todo: as we expand scap_stats_v2 prefix may be pushed to scap or we may need to expand
@ -334,10 +336,11 @@ void stats_writer::collector::get_metrics_output_fields_additional(
n_evts = stats_v2[stat].value.u64;
output_fields[metric_name] = n_evts;
output_fields["scap.n_evts_prev"] = m_last_n_evts;
if (m_last_n_evts != 0 && stats_snapshot_time_delta_sec > 0)
n_evts_delta = n_evts - m_last_n_evts;
if (n_evts_delta != 0 && stats_snapshot_time_delta_sec > 0)
{
/* n_evts is total number of kernel side events. */
output_fields["scap.evts_rate_sec"] = (double)((n_evts - m_last_n_evts) / stats_snapshot_time_delta_sec);
output_fields["scap.evts_rate_sec"] = (double)(n_evts_delta / stats_snapshot_time_delta_sec);
}
else
{
@ -351,23 +354,16 @@ void stats_writer::collector::get_metrics_output_fields_additional(
n_drops = stats_v2[stat].value.u64;
output_fields[metric_name] = n_drops;
output_fields["scap.n_drops_prev"] = m_last_n_drops;
if (m_last_n_drops != 0 && stats_snapshot_time_delta_sec > 0)
n_drops_delta = n_drops - m_last_n_drops;
if (n_drops_delta != 0 && stats_snapshot_time_delta_sec > 0)
{
/* n_drops is total number of kernel side event drops. */
output_fields["scap.evts_drop_rate_sec"] = (double)((n_drops - m_last_n_drops) / stats_snapshot_time_delta_sec);
output_fields["scap.evts_drop_rate_sec"] = (double)(n_drops_delta / stats_snapshot_time_delta_sec);
}
else
{
output_fields["scap.evts_drop_rate_sec"] = (double)(0);
}
if((n_evts - m_last_n_evts) > 0)
{
output_fields["scap.n_drops_perc"] = (double)((100.0 * (n_drops - m_last_n_drops)) / (n_evts - m_last_n_evts));
}
else
{
output_fields["scap.n_drops_perc"] = (double)(0);
}
m_last_n_drops = n_drops;
}
if (stats_v2[stat].value.u64 == 0 && !m_writer->m_config->m_metrics_include_empty_values)
@ -380,6 +376,16 @@ void stats_writer::collector::get_metrics_output_fields_additional(
break;
}
}
/* n_drops_perc needs to be calculated outside the loop given no field ordering guarantees.
* Always send n_drops_perc, even if zero. */
if(n_evts_delta > 0)
{
output_fields["scap.n_drops_perc"] = (double)((100.0 * n_drops_delta) / n_evts_delta);
}
else
{
output_fields["scap.n_drops_perc"] = (double)(0);
}
}
#endif
}