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authorVratko Polak <vrpolak@cisco.com>2020-10-27 19:09:44 +0100
committerVratko Polak <vrpolak@cisco.com>2020-10-29 20:25:50 +0000
commit023fa41e51c966a1956bda6b915ffd894ff10e84 (patch)
treecdb96c99a8ade4855176c43969cbd9a06adf693b /GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py
parente31998ea56c55879fbaae8e58b0dad0bc6549dae (diff)
Support existing test types with ASTF
+ 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>
Diffstat (limited to 'GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py')
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diff --git a/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py b/GPL/traffic_profiles/trex/trex-astf-ethip4udp-262144h-pps.py
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+# Copyright (c) 2020 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Traffic profile for T-rex advanced stateful (astf) traffic generator.
+Traffic profile:
+ - Two streams sent in directions 0 --> 1 (client -> server, requests) and
+ 1 --> 0 (server -> client, responses) at the same time.
+ - Packet: ETH / IP / UDP
+ - Direction 0 --> 1:
+ - Source IP address range: 172.16.0.0 - 172.19.255.255
+ - Destination IP address range: 20.16.0.0 - 20.19.255.255
+ - Direction 1 --> 0:
+ - Source IP address range: destination IP address from packet received
+ on port 1
+ - Destination IP address range: source IP address from packet received
+ on port 1
+
+This is a profile for PPS tests, it combines UDP connect and data transfer.
+No delays, server response waits for full request.
+"""
+
+from trex.astf.api import *
+from profile_trex_astf_base_class import TrafficProfileBaseClass
+
+
+class TrafficProfile(TrafficProfileBaseClass):
+ """Traffic profile."""
+
+ def __init__(self, **kwargs):
+ """Initialization and setting of profile parameters."""
+
+ super(TrafficProfileBaseClass, self).__init__()
+
+ # IPs used in packet headers.
+ self.p1_src_start_ip = u"172.16.0.0"
+ self.p1_src_end_ip = u"172.19.255.255"
+ self.p1_dst_start_ip = u"20.16.0.0"
+ self.p1_dst_end_ip = u"20.19.255.255"
+
+ self.headers_size = 42 # 14B l2 + 20B ipv4 + 8B UDP
+
+ self.udp_data = u""
+
+ self.n_data = 32 # TODO: set via input parameter
+ self.m_delay = 1200000 # delay 1200s (1,200,000 ms)
+ self.u_delay = 1000 * self.m_delay # delay 1200s (1,200,000,000 us)
+ self.limit = 16515072
+
+ def define_profile(self):
+ """Define profile to be used by advanced stateful traffic generator.
+
+ This method MUST return:
+
+ return ip_gen, templates
+
+ :returns: IP generator and profile templates for ASTFProfile().
+ :rtype: tuple
+ """
+ if self.framesize == 64:
+ self.udp_data += self._gen_padding(self.headers_size, 72)
+ if self.framesize == 1518:
+ self.udp_data += self._gen_padding(self.headers_size, 1514)
+
+ # Client program.
+ prog_c = ASTFProgram(stream=False)
+ prog_c.set_keepalive_msg(self.m_delay)
+ prog_c.send_msg(self.udp_data)
+ # No delay, PPS tests combine connect and data send (no data receive).
+ prog_c.set_var(u"var1", self.n_data)
+ prog_c.set_label(u"a:")
+ prog_c.send_msg(self.udp_data)
+ prog_c.jmp_nz(u"var1", u"a:")
+ # We should read the server response,
+ # but no reason to overload client workers even more.
+
+ # Server program.
+ prog_s = ASTFProgram(stream=False)
+ prog_s.set_keepalive_msg(self.m_delay)
+ # If server closes too soon, new instances are started
+ # leading in too much replies. To prevent that, we need to recv all.
+ prog_s.recv_msg(1 + self.n_data)
+ # In packet loss scenarios, some instances never get here.
+ # This maybe increases server traffic duration,
+ # but no other way if we want to avoid
+ # TRex creating a second instance of the same server.
+ prog_s.send_msg(self.udp_data)
+ prog_s.set_var(u"var2", self.n_data)
+ prog_s.set_label(u"b:")
+ prog_s.send_msg(self.udp_data)
+ prog_s.jmp_nz(u"var2", u"b:")
+ # VPP never duplicates packets,
+ # so it is safe to close the server instance now.
+
+ # ip generators
+ ip_gen_c = ASTFIPGenDist(
+ ip_range=[self.p1_src_start_ip, self.p1_src_end_ip],
+ distribution=u"seq"
+ )
+ ip_gen_s = ASTFIPGenDist(
+ ip_range=[self.p1_dst_start_ip, self.p1_dst_end_ip],
+ distribution=u"seq"
+ )
+ ip_gen = ASTFIPGen(
+ glob=ASTFIPGenGlobal(ip_offset=u"0.0.0.1"),
+ dist_client=ip_gen_c,
+ dist_server=ip_gen_s
+ )
+
+ # server association
+ s_assoc = ASTFAssociation(rules=ASTFAssociationRule(port=8080))
+
+ # template
+ temp_c = ASTFTCPClientTemplate(
+ program=prog_c,
+ ip_gen=ip_gen,
+ limit=self.limit,
+ port=8080
+ )
+ temp_s = ASTFTCPServerTemplate(program=prog_s, assoc=s_assoc)
+ template = ASTFTemplate(client_template=temp_c, server_template=temp_s)
+
+ return ip_gen, template, None
+
+
+def register():
+ """Register this traffic profile to T-Rex.
+
+ Do not change this function.
+
+ :return: Traffic Profiles.
+ :rtype: Object
+ """
+ return TrafficProfile()