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2022-09-30fix(soak): reduce scale coeffVratko Polak1-1/+1
After some experiments using simulator (based on real measurment data), coeff value of 5 gives nice balance between exploration and precision. Change-Id: I6c416ed5bf3796b2e952ae4d17ab6e6bce5e1b5f Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2022-09-30fix(soak): scale also rarityVratko Polak1-2/+2
Without this, far-off samples are considered too important leading to wrong integration. This should fix the symptom of secondary stats being too different. Change-Id: I66496ac25da95eae1f83154f32eb56f941cb20ce Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2022-03-15Soak: Improve ordering and commentsVratko Polak1-10/+15
After the previous fix, the code was not straightforward enough. Change-Id: I4e2d872b3f86de2868d947ad038b5f0f2c7eebd7 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2021-12-06PLRsearch: Update docscringsVratko Polak1-3/+11
Previous code changes updated code comments, but not docstring. Change-Id: I5be3fd07620cc97c9088efceb72c2f68ab103915 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2021-06-10FIX: Pylint reducepmikus4-4/+4
Signed-off-by: pmikus <pmikus@cisco.com> Change-Id: I909942dbb920df7f0fe15c0c92cda92c3cd8d8ad
2021-03-22MLRsearch: Support other than just two ratiosVratko Polak1-2/+2
+ Change some method names and argument types: + Do not mention NDR and PDR, except as examples. + Return list of ReceiveRateInterval instead of NdrPdrResult. + The resulting intervals can be degenerate when hitting min/max rate. + Rename quantity name parts from "fraction" to "ratio". + Intervals are no longer tracked for each target ratio. + They are found dynamically from known results. + Add effective_loss_ratio field to avoid loss inversion effects. + Move some functions to separate files. + Bound search logic moved to MeasurementDatabase.py + ProgressState moved to its file. + WidthArithmetics.py holds small computation functions. + Use parameter expansion_coefficient instead of "doublings". + Do uneven bisect to save time when width is not power of two times goal. + Timeout now correctly tracked for the whole search, not just the current phase. + Make logging (debug) function pluggable. + Added debug log messages for initial phase. + Do not mark as subclass if contructor signature differs. + Avoid re-measure on scale-limited (ASTF) profiles. + Remove outdated comments. + Bump copyright years. Change-Id: I93f693b4f186f59030ee5ac21b78acc890109813 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2020-10-29Support existing test types with ASTFVratko Polak1-13/+14
+ Add UDP_CPS, TCP_CPS, UDP_PPS and TCP_PPS suites. + Update existing cps traffic profiles. + Add missing traffic profiles. + UDP: + Single burst of 32 packets was confirmed as safe enough for TRex. + Maybe 64 could work, but not enough testing for that. + Multiple bursts have lead to reduced TRex performance, as overlaping bursts (from different client instances) tend to fill up the buffers. + TCP: + Data size set to 11111 bytes, completely arbitrarily. + Results look reasonable, so I have kept that. - MSS not set at all - No tested support for frame size other than 64B. - Frame size does not even factor into TCP profiles. + So other frame sizes are skipped in autogen. + Update tags in related suites. - HOSTS_{n} and SRC_USER_{n} should be unified. - Questionable clarification on difference between IP4BASE and SCALE. + Add NAT state resetters to tests that need them. + Resetter is called (if set) before each measurement. + If ramp-up is detected, resetter is not set. + Rename "mult" argument to "multiplier". + Abstracted from packets to transactions. + Transaction corresponds to profile. + TRex multiplier argument sets target rate in transactions per second. + The familiar STL traffic: + Bidirectional is considered to be 2 packets per transaction. + Unidirectional is considered to be 1 packet per transaction. + The newer ASTF traffic: + 4 subtypes, each has different number of packets per transaction. + For max rate computation: + Packets in the more numerous direction are considered. + Rely on TRex reported traffic duration for ASTF: + Use the server side value. - Client side value is higher by an overhead. - TRex is not sending traffic during that time. + Remove delays from traffic profiles. - Those delays would increase the reprted traffic time. + Support for scale lmited trials. + Only for ASTF profiles, each ASTF profile has limited scale. + Scale defined in suite variables. + For TRex to send all transactions provided duration value is ignored. + The appropriate value is computed in TrafficGenerator. + An ad-hoc time constant is added to match the TRex client side time overhead. + The profile driver receives the computed duration. + Measurement for PLRsearch add a sleep if the computed duration is smaller. + Alternative argument for search algos if scale is limited. + Both need higher timeout to accomodate big scales. + MLRsearch can afford fewer phases. + Added a parameter to optionally shorten the duration. + Use short duration for runtime stats trial and failure stats trial. + Use very large keepalive values in udp profiles to avoid ka packets. + No polling in ASTF profile driver. - Polling could eliminate the time overhead value. + But polling proved to introduce some loss, affecting the results. + Handle duration stretching in ASTF by stopping traffic. + The stop has several steps so that: + The traffic is really stopped entirely. + Late packets do not count (maybe as errors). + Stats are preserved to read for results (and cleared afterwards). + Several quantities added to ReceiveRateMeasurement: + Original target duration is preserved (algos need that). + Input estimate (tps) for early search iterations. + Output estimate (maybe pps) for MRR output. + Strict result (unsent counts as loss) for NDR. + Use L2 counters (opackets, ipackets) where possible. - TRex has trouble processing packets for the L7 ones at high loads. + Remove warmup from profile drivers and keywords. + Suites should call "Send ramp-up traffic" explicitly if needed. + Added parsing for few more counters. + Both to use in formulas or just for debug purposes. - Only 64B cases in autogen, framesize support to be added later. + Latency streams during search can be enabled via PERF_USE_LATENCY env var. + MLRsearch improvments: + Rename argument names to min_rate and max_rate. + Use relative receive rate in initial phase. + PLRsearch improvements: + Careful computation when output (pps) does not match input (tps). + Use geometric distribution (instead of Poisson). + Helps agains math errors. + This should improve estimate stability. - But in practice big losses still lead to significant jumps. + Traffic generator improvements: + send_traffic_on_tg now calls the full set_rate_provider_defaults. + _send_traffic_on_tg_internal for the logic without provider defaults. + As the internal function is re-used by measure() without affecting defaults. + Move _parse_traffic_results just before get_measurement_result. + As the latter uses fields set bu the former, it is now easier to read. + Multiple sources for approximate duration. + Tried from more precise to more available. + Includes logic for _pps tests (added in later change). + Move explicit type conversions to earlier occurences. + Profile driver output field uses semicolons to simplify parsing. + Performance Robot lib file split to several smaller ones. + performance_actions.robot: + Hosts Additional Statistics Action For * keywords. + performance_display.robot: + Hosts keyword for displaying and verifying results. + Change test message to use the correct unit (pps or cps). + performance_limits.robot renamed to performance_vars.robot + Added many keywords, mostly for accessing test variables. + Moved variables for Policer into a new keyword there. + Some keywords need sophisticated logic. - Other are basically Get Variable Value. + But in future more logic can be added, without editing callers. + Documentation for the new keywords acts as a documentation for test variables. + performance_utils.robot has the rest. + Eliminated arguments if the value is in test variable. + Small improvements to documentation. - Still not enough cleanup with respect to arguments and test variables. + Keywords are sorted alphabetically now in each one. + Suites: + Unified variables table: + No colons in comments. + ${n_hosts}, ${n_ports} and use them instead hardcoded numbers. + Add -cps to existing cps suite names. + Remove "trial data overwrite". + Compute max rate as in STL suites. + Each NAT suite has ip4base suite to compare results to. - Those act as indirect TRex calibration. - VPP does not lose packets in those. + Latency in ASTF suites is disabled hard. - As we do not support latency in ASTF profiles yet. + Unidirectional tests governed by suite variable, not an argument. + Write long argument lists vertically. + Prefer to use argument names. + In Python, also the last argument is followed by comma. + It makes renaming and reordering easier. + Similarly applies to prints with long lists of values. + A TODO to update api crc file comments. Change-Id: I84729355edbec051298a9de1162107f88ff5737d Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2020-07-28Soak: Avoid a possible deadlock.Vratko Polak1-3/+5
Change-Id: I31c2d7744b5cd3021132fb188480b8edec74986c Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2020-07-13Soak: Do not allow negative lossVratko Polak1-0/+2
Change-Id: I6da359d25edc415e44263d3f85f166369e564987 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2020-07-13Soak: Fix worker exception passingVratko Polak1-2/+10
Change-Id: I636f020e97df1b37ac8b6a30af511eebe611b56f Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2019-11-28Python3: resources and librariesJan Gelety4-166/+190
Change-Id: I1392c06b1d64f62b141d24c0d42a8e36913b15e2 Signed-off-by: Jan Gelety <jgelety@cisco.com>
2019-08-23Improve PLRsearch yet againVratko Polak5-50/+166
Logic improvements for rls1908 and post-pylint fixes: + Reduce search time to 30 minutes. + Use average instead alternating loads. + Rework log/exp avg/stdev from two estimates. + Introduce and use pessimistic variance of dual trackers. + Introduce safe_exp to use when None does not skip code. + Use dot relative imports (instead of disabling pylint). + Complete docstrings for simpler functions. + Append docstrings to named tuples. + Somewhat unify docstrings related to the same arguments. + Slightly improve intentation. + State named tuples as rtype where used. + Add returns and rtype to __repr__ where missing. + Return what docstring say (or update them). + Explicit copying for vector and matrix values. Change-Id: I884c68b4839c5df5e8bef95e463666599603a0ff Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2019-08-19Framework: Refactor complex functions in PLRSearchMiroslav Los2-49/+68
Signed-off-by: Miroslav Los <miroslav.los@pantheon.tech> Change-Id: Ie2f19a2e3b37e8d85656ab31ece59b89c76bea25
2019-05-10PLRsearch: Use stat trackers to shorten IntegratorVratko Polak3-401/+698
+ Extract several tracker classes and use them in Integrator. + Apply next_rate workarounds to focus more on critical region. + Rewrite stretch function, as the previous implementation was wrong. + Rework logging: ++ Use injected trace() function in Integrator. ++ Inject function that skips trace logging on default initialization. ++ Use the same multiprocessing-safe passing, but separate queue. + Set duration to 120m in Robot, but keep at 30m in Python. + Apply minor changes to make computations more reproducible: ++ Attempt to log everything needed by reproducibility in one line. ++ Log samples used, and make it settable as upper limit. ++ Use repr output in TRex scripts, to avoid rounding when copypasting. +- Numpy seems to be sharing PRNG between processes. +-- An edit to disable one thread is needed for full reproducibility. +-- Such an edit is prepared, but will not be merged anytime soon. Change-Id: Icf56429b34ab6de2d18a12e6c676e2d242b3ba4c Signed-off-by: Vratko Polak <vrpolak@cisco.com>
2019-01-29PLRsearch: Initial implementation and suitesVratko Polak4-0/+1079
Missing bits: - Add up-to-date .rst document (in child Change). - Prepare for releasing to PyPI.org (in child Change): -- Either copy dependencies from MLRsearch, or list in requirements. -- Perhaps move common dependencies to separate package for both search to depend on. -- All the other metadata stuff. Jira: CSIT-1276 Change-Id: I277efdb63dbb90b30e11f4e30a82e2130ac8efc3 Signed-off-by: Vratko Polak <vrpolak@cisco.com>