Current parameters for performance trending MRR tests:
-- Ethernet frame sizes: 64B (78B for IPv6 tests) for all tests, IMIX for
+- **Ethernet frame sizes**: 64B (78B for IPv6 tests) for all tests, IMIX for
selected tests (vhost, memif); all quoted sizes include frame CRC, but
exclude per frame transmission overhead of 20B (preamble, inter frame
gap).
-
-- Maximum load offered: 10GE and 40GE link (sub-)rates depending on NIC
+- **Maximum load offered**: 10GE and 40GE link (sub-)rates depending on NIC
tested, with the actual packet rate depending on frame size,
transmission overhead and traffic generator NIC forwarding capacity.
a 40GE bi-directional link sub-rate limited by TG 40GE NIC used,
XL710.
-- Trial duration: 10sec.
-- Execution frequency: twice a day, every 12 hrs (02:00, 14:00 UTC).
+- **Trial duration**: 10sec.
+- **Execution frequency**: twice a day, every 12 hrs (02:00, 14:00 UTC).
Note: MRR tests should be reporting bi-directional link rate (or NIC
rate, if lower) if tested VPP configuration can handle the packet rate
Following statistical metrics are used as performance trend indicators
over the rolling window of last <N> sets of historical measurement data:
-- Q1, Q2, Q3 : Quartiles, three points dividing a ranked data set
- of <N> values into four equal parts, Q2 is the median of the data.
-- IQR = Q3 - Q1 : Inter Quartile Range, measure of variability, used
- here to calculate and eliminate outliers.
-- Outliers : extreme values that are at least (1.5 * IQR) below Q1.
+- **Q1**, **Q2**, **Q3** : **Quartiles**, three points dividing a ranked
+ data set of <N> values into four equal parts, Q2 is the median of the
+ data.
+- **IQR** = Q3 - Q1 : **Inter Quartile Range**, measure of variability,
+ used here to calculate and eliminate outliers.
+- **Outliers** : extreme values that are at least (1.5 * IQR) below Q1.
- Note: extreme values that are at least (1.5 * IQR) above Q3 are not
considered outliers, and are likely to be classified as
progressions.
-- TMA : Trimmed Moving Average, average across the data set of <N>
- values without the outliers. Used here to calculate TMSD.
-- TMSD : Trimmed Moving Standard Deviation, standard deviation over the
- data set of <N> values without the outliers,
- requires calculating TMA. Used for anomaly detection.
-- TMM : Trimmed Moving Median, median across the data set of <N> values
- excluding the outliers. Used as a trending value and as a reference
- for anomaly detection.
+- **TMA** : **Trimmed Moving Average**, average across the data set of
+ <N> values without the outliers. Used here to calculate TMSD.
+- **TMSD** : **Trimmed Moving Standard Deviation**, standard deviation
+ over the data set of <N> values without the outliers, requires
+ calculating TMA. Used for anomaly detection.
+- **TMM** : **Trimmed Moving Median**, median across the data set of <N>
+ values excluding the outliers. Used as a trending value and as a
+ reference for anomaly detection.
Outlier Detection
`````````````````
Outlier evaluation of test result of value <X> follows the definition
from previous section:
- ::
-
- Outlier Evaluation Formula Evaluation Result
- ====================================================
- X < (Q1 - 1.5 * IQR) Outlier
- X >= (Q1 - 1.5 * IQR) Valid (For Trending)
++----------------------------+----------------------+
+| Outlier Evaluation Formula | Evaluation Result |
++============================+======================+
+| X < (Q1 - 1.5 * IQR) | Outlier |
++----------------------------+----------------------+
+| X >= (Q1 - 1.5 * IQR) | Valid (For Trending) |
++----------------------------+----------------------+
Anomaly Detection
`````````````````
trend metrics and detect anomalies, three simple evaluation formulas are
used:
- ::
-
- Anomaly Compliance Evaluation
- Evaluation Formula Confidence Level Result
- =============================================================================
- (TMM - 3 * TMSD) <= X <= (TMM + 3 * TMSD) 99.73% Normal
- X < (TMM - 3 * TMSD) Anomaly Regression
- X > (TMM + 3 * TMSD) Anomaly Progression
++-------------------------------------------+------------------+-------------+
+| Anomaly | Compliance | Evaluation |
+| Evaluation Formula | Confidence Level | Result |
++===========================================+==================+=============+
+| (TMM - 3 * TMSD) <= X <= (TMM + 3 * TMSD) | 99.73% | Normal |
++-------------------------------------------+------------------+-------------+
+| X < (TMM - 3 * TMSD) | Anomaly | Regression |
++-------------------------------------------+------------------+-------------+
+| X > (TMM + 3 * TMSD) | Anomaly | Progression |
++-------------------------------------------+------------------+-------------+
TMM is used for the central trend reference point instead of TMA as it
is more robust to anomalies.
quarter except last week, max(TMM[(last - 3mths)..(last - 1week)]),
respectively. This results in following trend compliance calculations:
- ::
-
- Trend
- Compliance Metric Change Formula V(alue) R(eference)
- =============================================================================================
- Short-Term Change ((V - R) / R) TMM[last] TMM[last - 1week]
- Long-Term Change ((V - R) / R) TMM[last] max(TMM[(last - 3mths)..(last - 1week)])
++-------------------+----------------+-----------+------------------------------------------+
+| Trend | | | |
+| Compliance Metric | Change Formula | V(alue) | R(eference) |
++===================+================+===========+==========================================+
+| Short-Term Change | ((V - R) / R) | TMM[last] | TMM[last - 1week] |
++-------------------+----------------+-----------+------------------------------------------+
+| Long-Term Change | ((V - R) / R) | TMM[last] | max(TMM[(last - 3mths)..(last - 1week)]) |
++-------------------+----------------+-----------+------------------------------------------+
Trend Presentation
------------------
CSIT PT runs regular performance test jobs measuring and collecting MRR
data per test case. PT is designed as follows:
-#. PT job triggers:
+1. PT job triggers:
- - Periodic e.g. daily.
- - On-demand gerrit triggered.
+ a) Periodic e.g. daily.
+ b) On-demand gerrit triggered.
-#. Measurements and data calculations per test case:
+2. Measurements and data calculations per test case:
- - MRR Max Received Rate
+ a) Max Received Rate (MRR) - send packets at link rate over a trial
+ period, count total received packets, divide by trial period.
- - Measured: Unlimited tolerance of packet loss.
- - Send packets at link rate, count total received packets, divide
- by test trial period.
-
-#. Archive MRR per test case.
-#. Archive all counters collected at MRR.
+3. Archive MRR per test case.
+4. Archive all counters collected at MRR.
Performance Analysis (PA)
`````````````````````````
over the rolling window of last <N> sets of historical measurement data.
PA is defined as follows:
-#. PA job triggers:
-
- - By PT job at its completion.
- - On-demand gerrit triggered.
-
-#. Download and parse archived historical data and the new data:
+1. PA job triggers:
- - Download RF output.xml files from latest PT job and compressed
- archived data.
+ a) By PT job at its completion.
+ b) On-demand gerrit triggered.
- - Parse out the data filtering test cases listed in PA specification
- (part of CSIT PAL specification file).
+2. Download and parse archived historical data and the new data:
- - Evalute new data from latest PT job against the rolling window of
- <N> sets of historical data for trendline calculation, anomaly
- detection and short-term trend compliance. And against long-term
- trendline metrics for long-term trend compliance.
+ a) Download RF output.xml files from latest PT job and compressed
+ archived data.
+ b) Parse out the data filtering test cases listed in PA specification
+ (part of CSIT PAL specification file).
+ c) Evalute new data from latest PT job against the rolling window of
+ <N> sets of historical data for trendline calculation, anomaly
+ detection and short-term trend compliance. And against long-term
+ trendline metrics for long-term trend compliance.
-#. Calculate trend metrics for the rolling window of <N> sets of
+3. Calculate trend metrics for the rolling window of <N> sets of
historical data:
- - Calculate quartiles Q1, Q2, Q3.
- - Trim outliers using IQR.
- - Calculate TMA and TMSD.
- - Calculate normal trending range per test case based on TMM and
- TMSD.
+ a) Calculate quartiles Q1, Q2, Q3.
+ b) Trim outliers using IQR.
+ c) Calculate TMA and TMSD.
+ d) Calculate normal trending range per test case based on TMM and
+ TMSD.
-#. Evaluate new test data against trend metrics:
+4. Evaluate new test data against trend metrics:
- - If within the range of (TMA +/- 3*TMSD) => Result = Pass,
- Reason = Normal. (to be updated base on the final Jenkins code).
- - If below the range => Result = Fail, Reason = Regression.
- - If above the range => Result = Pass, Reason = Progression.
+ a) If within the range of (TMA +/- 3*TMSD) => Result = Pass,
+ Reason = Normal. (to be updated base on the final Jenkins code).
+ b) If below the range => Result = Fail, Reason = Regression.
+ c) If above the range => Result = Pass, Reason = Progression.
-#. Generate and publish results
+5. Generate and publish results
- - Relay evaluation result to job result. (to be updated base on the
- final Jenkins code).
- - Generate a new set of trend summary dashboard and graphs.
- - Publish trend dashboard and graphs in html format on
- https://docs.fd.io/.
+ a) Relay evaluation result to job result. (to be updated base on the
+ final Jenkins code).
+ b) Generate a new set of trend summary dashboard and graphs.
+ c) Publish trend dashboard and graphs in html format on
+ https://docs.fd.io/.
Code Review / csit.git / blobdiff