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---
title: "Telemetry"
weight: 20
---
# Telemetry
OpenMetrics specifies the de-facto standard for transmitting cloud-native
metrics at scale, with support for both text representation and Protocol
Buffers.
## RFC
- RFC2119
- RFC5234
- RFC8174
- draft-richih-opsawg-openmetrics-00
## Reference
[OpenMetrics](https://github.com/OpenObservability/OpenMetrics/blob/master/specification/OpenMetrics.md)
## Metric Types
- Gauge
- Counter
- StateSet
- Info
- Histogram
- GaugeHistogram
- Summary
- Unknown
Telemetry module in CSIT currently support only Gauge, Counter and Info.
## Anatomy of CSIT telemetry implementation
Existing implementation consists of several measurment building blocks:
the main measuring block running search algorithms (MLR, PLR, SOAK, MRR, ...),
the latency measuring block and the several telemetry blocks with or without
traffic running on a background.
The main measuring block must not be interrupted by any read operation that can
impact data plane traffic processing during throughput search algorithm. Thus
operational reads are done before (pre-stat) and after (post-stat) that block.
Some operational reads must be done while traffic is running and usually
consists of two reads (pre-run-stat, post-run-stat) with defined delay between
them.
## MRR measurement
traffic_start(r=mrr) traffic_stop |< measure >|
| | | (r=mrr) |
| pre_run_stat post_run_stat | pre_stat | | post_stat
| | | | | | | |
--o--------o---------------o---------o-------o--------+-------------------+------o------------>
t
Legend:
- pre_run_stat
- vpp-clear-runtime
- post_run_stat
- vpp-show-runtime
- bash-perf-stat // if extended_debug == True
- pre_stat
- vpp-clear-stats
- vpp-enable-packettrace // if extended_debug == True
- vpp-enable-elog
- post_stat
- vpp-show-stats
- vpp-show-packettrace // if extended_debug == True
- vpp-show-elog
|< measure >|
| (r=mrr) |
| |
|< traffic_trial0 >|< traffic_trial1 >|< traffic_trialN >|
| (i=0,t=duration) | (i=1,t=duration) | (i=N,t=duration) |
| | | |
--o------------------------o------------------------o------------------------o--->
t
## MLR measurement
|< measure >| traffic_start(r=pdr) traffic_stop traffic_start(r=ndr) traffic_stop |< [ latency ] >|
| (r=mlr) | | | | | | .9/.5/.1/.0 |
| | | pre_run_stat post_run_stat | | pre_run_stat post_run_stat | | |
| | | | | | | | | | | |
--+-------------------+----o--------o---------------o---------o--------------o--------o---------------o---------o------------[---------------------]--->
t
Legend:
- pre_run_stat
- vpp-clear-runtime
- post_run_stat
- vpp-show-runtime
- bash-perf-stat // if extended_debug == True
- pre_stat
- vpp-clear-stats
- vpp-enable-packettrace // if extended_debug == True
- vpp-enable-elog
- post_stat
- vpp-show-stats
- vpp-show-packettrace // if extended_debug == True
- vpp-show-elog
## MRR measurement
traffic_start(r=mrr) traffic_stop |< measure >|
| | | (r=mrr) |
| |< stat_runtime >| | stat_pre_trial | | stat_post_trial
| | | | | | | |
----o---+--------------------------+---o-------------o------------+-------------------+-----o------------->
t
Legend:
- stat_runtime
- vpp-runtime
- stat_pre_trial
- vpp-clear-stats
- vpp-enable-packettrace // if extended_debug == True
- stat_post_trial
- vpp-show-stats
- vpp-show-packettrace // if extended_debug == True
|< measure >|
| (r=mrr) |
| |
|< traffic_trial0 >|< traffic_trial1 >|< traffic_trialN >|
| (i=0,t=duration) | (i=1,t=duration) | (i=N,t=duration) |
| | | |
--o------------------------o------------------------o------------------------o--->
t
|< stat_runtime >|
| |
|< program0 >|< program1 >|< programN >|
| (@=params) | (@=params) | (@=params) |
| | | |
--o------------------------o------------------------o------------------------o--->
t
## MLR measurement
|< measure >| traffic_start(r=pdr) traffic_stop traffic_start(r=ndr) traffic_stop |< [ latency ] >|
| (r=mlr) | | | | | | .9/.5/.1/.0 |
| | | |< stat_runtime >| | | |< stat_runtime >| | | |
| | | | | | | | | | | |
--+-------------------+-----o---+--------------------------+---o--------------o---+--------------------------+---o-----------[---------------------]--->
t
Legend:
- stat_runtime
- vpp-runtime
- stat_pre_trial
- vpp-clear-stats
- vpp-enable-packettrace // if extended_debug == True
- stat_post_trial
- vpp-show-stats
- vpp-show-packettrace // if extended_debug == True
|
