X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Frobot%2Fperformance%2Fperformance_utils.robot;h=59423304a246081ab17c5571a569dd89d9e092f0;hp=5cf6dba84ca4646fe0dcaad310d1b7eefeb6b9e3;hb=b6fbffad32515ccf94404680cb5280c2cb561af5;hpb=023fa41e51c966a1956bda6b915ffd894ff10e84

diff --git a/resources/libraries/robot/performance/performance_utils.robot b/resources/libraries/robot/performance/performance_utils.robot
index 5cf6dba84c..59423304a2 100644
--- a/resources/libraries/robot/performance/performance_utils.robot
+++ b/resources/libraries/robot/performance/performance_utils.robot
@@ -1,4 +1,4 @@
-# Copyright (c) 2020 Cisco and/or its affiliates.
+# Copyright (c) 2021 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:
@@ -17,6 +17,7 @@
 | Library | resources.libraries.python.NodePath
 | Library | resources.libraries.python.PerfUtil
 | Library | resources.libraries.python.InterfaceUtil
+| Library | resources.libraries.python.Iperf3
 | Library | resources.libraries.python.TrafficGenerator
 | Library | resources.libraries.python.TrafficGenerator.OptimizedSearch
 | Library | resources.libraries.python.TrafficGenerator.TGDropRateSearchImpl
@@ -50,6 +51,8 @@
 | | ... | \| Clear and show runtime counters with running traffic \|
 | |
 | | ${ppta} = | Get Packets Per Transaction Aggregated
+| | ${ramp_up_duration} = | Get Ramp Up Duration
+| | ${ramp_up_rate} = | Get Ramp Up Rate
 | | ${runtime_duration} = | Get Runtime Duration
 | | ${runtime_rate} = | Get Runtime Rate
 | | ${traffic_directions} = | Get Traffic Directions
@@ -71,6 +74,8 @@
 | | ... | transaction_scale=${transaction_scale}
 | | ... | transaction_type=${transaction_type}
 | | ... | duration_limit=${0.0}
+| | ... | ramp_up_duration=${ramp_up_duration}
+| | ... | ramp_up_rate=${ramp_up_rate}
 | | FOR | ${action} | IN | @{pre_run_stats}
 | | | Run Keyword | Additional Statistics Action For ${action}
 | | END
@@ -86,9 +91,8 @@
 | | ... | using PLRsearch algorithm.
 | | ... | Display results as formatted test message.
 | | ... | Fail if computed lower bound is 110% of the minimal rate or less.
-| | ... | Input rates are understood as uni-directional,
-| | ... | reported result contains aggregate rates.
-| | ... | Currently, the min_rate value is hardcoded to match test teardowns.
+| | ... | Input rates are unidirectional, in transaction per second.
+| | ... | Reported result may contain aggregate pps rates, depending on test.
 | | ... | Call \${resetter} (if defined) to reset DUT state before each trial.
 | |
 | | ... | *Test (or broader scope) variables read:*
@@ -105,8 +109,10 @@
 | |
 | | # Get values via performance_vars.
 | | ${max_rate} = | Get Max Rate
-| | ${min_rate} = | Get Min Rate
+| | ${min_rate_soft} = | Get Min Rate Soft
 | | ${ppta} = | Get Packets Per Transaction Aggregated
+| | ${ramp_up_duration} = | Get Ramp Up Duration
+| | ${ramp_up_rate} = | Get Ramp Up Rate
 | | ${resetter} = | Get Resetter
 | | ${traffic_directions} = | Get Traffic Directions
 | | ${transaction_duration} = | Get Transaction Duration
@@ -116,7 +122,7 @@
 | | ${average} | ${stdev} = | Perform soak search
 | | ... | frame_size=${frame_size}
 | | ... | traffic_profile=${traffic_profile}
-| | ... | minimum_transmit_rate=${min_rate}
+| | ... | minimum_transmit_rate=${min_rate_soft}
 | | ... | maximum_transmit_rate=${max_rate}
 | | ... | plr_target=${1e-7}
 | | ... | tdpt=${0.1}
@@ -130,27 +136,26 @@
 | | ... | transaction_duration=${transaction_duration}
 | | ... | transaction_type=${transaction_type}
 | | ... | use_latency=${use_latency}
+| | ... | ramp_up_duration=${ramp_up_duration}
+| | ... | ramp_up_rate=${ramp_up_rate}
 | | ${lower} | ${upper} = | Display result of soak search
 | | ... | ${average} | ${stdev}
 | | Set Test Variable | \${rate for teardown} | ${lower}
-| | Should Not Be True | 1.1 * ${min_rate} > ${lower}
-| | ... | Lower bound ${lower} too small for unidirectional minimum ${min_rate}.
+| | Should Not Be True | 1.1 * ${min_rate_soft} > ${lower}
+| | ... | Lower bound ${lower} too small for unidir minimum ${min_rate_soft}.
 
 | Find NDR and PDR intervals using optimized search
 | | [Documentation]
 | | ... | Find boundaries for RFC2544 compatible NDR and PDR values
 | | ... | using an optimized search algorithm.
 | | ... | Display findings as a formatted test message.
-| | ... | Fail if a resulting lower bound has too high loss fraction.
-| | ... | Input rates are understood as uni-directional,
-| | ... | reported result contains aggregate rates.
+| | ... | Fail if a resulting lower bound has too high loss ratio.
+| | ... | Input rates are unidirectional, in transaction per second.
+| | ... | Reported result may contain aggregate pps rates, depending on test.
 | | ... | Additional latency measurements are performed for smaller loads,
 | | ... | even if latency stream is disabled in search. Their results
 | | ... | are also displayed.
 | | ... | Finally, two measurements for runtime stats are done (not displayed).
-| | ... | Currently, the min_rate value is hardcoded to 90kpps,
-| | ... | allowing measurement at 10% of the discovered rate
-| | ... | without breaking latency streams.
 | | ... | Call \${resetter} (if defined) to reset DUT state before each trial.
 | |
 | | ... | *Test (or broader scope) variables read:*
@@ -158,7 +163,7 @@
 | | ... | Type: string
 | | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: integer or
 | | ... | string
-| | ... | - max_rate - Calculated maximal transmit rate [tps].
+| | ... | - max_rate - Calculated maximal unidirectional transmit rate [tps].
 | | ... | Type: float
 | | ... | - resetter - Callable to reset DUT state before each trial.
 | | ... | - transaction_scale - Number of ASTF transaction (zero if unlimited).
@@ -174,10 +179,12 @@
 | | # Get values via performance_vars.
 | | ${disable_latency} = | Get Disable Latency
 | | ${max_rate} = | Get Max Rate
-| | ${min_rate} = | Get Min Rate
+| | ${min_rate_soft} = | Get Min Rate Soft
 | | # \${packet_loss_ratio} is used twice so it is worth a variable.
 | | ${packet_loss_ratio} = | Get Packet Loss Ratio
 | | ${ppta} = | Get Packets Per Transaction Aggregated
+| | ${ramp_up_duration} = | Get Ramp Up Duration
+| | ${ramp_up_rate} = | Get Ramp Up Rate
 | | ${resetter} = | Get Resetter
 | | ${traffic_directions} = | Get Traffic Directions
 | | ${transaction_duration} = | Get Transaction Duration
@@ -187,7 +194,7 @@
 | | ${result} = | Perform optimized ndrpdr search
 | | ... | frame_size=${frame_size}
 | | ... | traffic_profile=${traffic_profile}
-| | ... | minimum_transmit_rate=${min_rate}
+| | ... | minimum_transmit_rate=${min_rate_soft}
 | | ... | maximum_transmit_rate=${max_rate}
 | | ... | packet_loss_ratio=${packet_loss_ratio}
 | | ... | final_relative_width=${0.005}
@@ -195,7 +202,6 @@
 | | ... | initial_trial_duration=${1.0}
 | | ... | number_of_intermediate_phases=${2}
 | | ... | timeout=${720.0}
-| | ... | doublings=${2}
 | | ... | ppta=${ppta}
 | | ... | resetter=${resetter}
 | | ... | traffic_directions=${traffic_directions}
@@ -203,12 +209,14 @@
 | | ... | transaction_scale=${transaction_scale}
 | | ... | transaction_type=${transaction_type}
 | | ... | use_latency=${use_latency}
+| | ... | ramp_up_duration=${ramp_up_duration}
+| | ... | ramp_up_rate=${ramp_up_rate}
 | | Display result of NDRPDR search | ${result}
-| | Check NDRPDR interval validity | ${result.pdr_interval}
+| | Check NDRPDR interval validity | ${result[1]}
 | | ... | ${packet_loss_ratio}
-| | Check NDRPDR interval validity | ${result.ndr_interval}
-| | ${pdr} = | Set Variable | ${result.pdr_interval.measured_low.target_tr}
-| | ${ndr} = | Set Variable | ${result.ndr_interval.measured_low.target_tr}
+| | Check NDRPDR interval validity | ${result[0]}
+| | ${pdr} = | Set Variable | ${result[1].measured_low.target_tr}
+| | ${ndr} = | Set Variable | ${result[0].measured_low.target_tr}
 | | # We expect NDR and PDR to have different-looking stats.
 | | Send traffic at specified rate
 | | ... | rate=${pdr}
@@ -235,9 +243,8 @@
 | Find Throughput Using MLRsearch
 | | [Documentation]
 | | ... | Find and return lower bound NDR (zero PLR)
-| | ... | aggregate throughput using MLRsearch algorithm.
-| | ... | Input rates are understood as uni-directional.
-| | ... | Currently, the min_rate value is hardcoded to match test teardowns.
+| | ... | throughput using MLRsearch algorithm.
+| | ... | Input and output rates are understood as uni-directional, in tps.
 | | ... | Call \${resetter} (if defined) to reset DUT state before each trial.
 | |
 | | ... | *Test (or broader scope) variables read:*
@@ -245,7 +252,7 @@
 | | ... | Type: string
 | | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: integer or
 | | ... | string
-| | ... | - max_rate - Calculated maximal transmit rate [tps].
+| | ... | - max_rate - Calculated maximal unidirectional transmit rate [tps].
 | | ... | Type: float
 | | ... | - resetter - Callable to reset DUT state before each trial.
 | | ... | - transaction_scale - Number of ASTF transaction (zero if unlimited).
@@ -253,15 +260,18 @@
 | | ... | transactions. Default is "packet".
 | |
 | | ... | *Returns:*
-| | ... | - Lower bound for bi-directional throughput at given PLR. Type: float
+| | ... | - Lower bound for uni-directional tps throughput at given PLR.
+| | ... | Type: float
 | |
 | | ... | *Example:*
 | |
 | | ... | \| \${throughpt}= \| Find Throughput Using MLRsearch \|
 | |
 | | ${max_rate} = | Get Max Rate
-| | ${min_rate} = | Get Min Rate
+| | ${min_rate_soft} = | Get Min Rate Soft
 | | ${ppta} = | Get Packets Per Transaction Aggregated
+| | ${ramp_up_duration} = | Get Ramp Up Duration
+| | ${ramp_up_rate} = | Get Ramp Up Rate
 | | ${resetter} = | Get Resetter
 | | ${traffic_directions} = | Get Traffic Directions
 | | ${transaction_duration} = | Get Transaction Duration
@@ -271,7 +281,7 @@
 | | ${result} = | Perform optimized ndrpdr search
 | | ... | frame_size=${frame_size}
 | | ... | traffic_profile=${traffic_profile}
-| | ... | minimum_transmit_rate=${min_rate}
+| | ... | minimum_transmit_rate=${min_rate_soft}
 | | ... | maximum_transmit_rate=${max_rate}
 | | ... | packet_loss_ratio=${0.0}
 | | ... | final_relative_width=${0.001}
@@ -279,7 +289,6 @@
 | | ... | initial_trial_duration=${1.0}
 | | ... | number_of_intermediate_phases=${1}
 | | ... | timeout=${720}
-| | ... | doublings=${2}
 | | ... | ppta=${ppta}
 | | ... | resetter=${resetter}
 | | ... | traffic_directions=${traffic_directions}
@@ -287,21 +296,22 @@
 | | ... | transaction_scale=${transaction_scale}
 | | ... | transaction_type=${transaction_type}
 | | ... | use_latency=${use_latency}
-| | Check NDRPDR interval validity | ${result.pdr_interval}
-| | ... | ${0.0}
-| | Return From Keyword | ${result.pdr_interval.measured_low.target_tr}
+| | ... | ramp_up_duration=${ramp_up_duration}
+| | ... | ramp_up_rate=${ramp_up_rate}
+| | Check NDRPDR interval validity | ${result[0]}
+| | Return From Keyword | ${result[0].measured_low.target_tr}
 
 | Measure and show latency at specified rate
 | | [Documentation]
 | | ... | Send traffic at specified rate, single trial.
 | | ... | Extract latency information and append it to text message.
-| | ... | The rate argument is int, so should not include "pps".
+| | ... | The rate argument is float, so should not include "pps".
 | | ... | If the given rate is too low, a safe value is used instead.
 | | ... | Call \${resetter} (if defined) to reset DUT state before each trial.
 | |
 | | ... | *Arguments:*
 | | ... | - message_prefix - Preface to test message addition. Type: string
-| | ... | - rate - Rate [tps] for sending packets.
+| | ... | - rate - Unidirectional rate [tps] for sending packets.
 | | ... | Type: float
 | |
 | | ... | *Example:*
@@ -311,9 +321,11 @@
 | |
 | | [Arguments] | ${message_prefix} | ${rate}
 | |
-| | ${min_rate} = | Get Min Rate
+| | ${min_rate_hard} = | Get Min Rate Hard
 | | ${ppta} = | Get Packets Per Transaction Aggregated
-| | ${real_rate} = | Evaluate | max(${rate}, ${min_rate})
+| | ${ramp_up_duration} = | Get Ramp Up Duration
+| | ${ramp_up_rate} = | Get Ramp Up Rate
+| | ${real_rate} = | Evaluate | max(${rate}, ${min_rate_hard})
 | | ${traffic_directions} = | Get Traffic Directions
 | | ${transaction_duration} = | Get Transaction Duration
 | | ${transaction_scale} = | Get Transaction Scale
@@ -332,12 +344,14 @@
 | | ... | transaction_scale=${transaction_scale}
 | | ... | transaction_type=${transaction_type}
 | | ... | use_latency=${True}
+| | ... | ramp_up_duration=${ramp_up_duration}
+| | ... | ramp_up_rate=${ramp_up_rate}
 | | ${latency} = | Get Latency Int
 | | Set Test Message | ${\n}${message_prefix} ${latency} | append=${True}
 
 | Send ramp-up traffic
 | | [Documentation]
-| | ... | Do nothing unless positive ramp-up duration is specified.
+| | ... | Fail unless positive ramp-up rate is specified.
 | | ... | Else perform one trial with appropriate rate and duration.
 | | ... | This is useful for tests that set DUT state via traffic.
 | | ... | Rate has to bee low enough so packets are not lost,
@@ -351,7 +365,7 @@
 | | ... | string
 | | ... | - ramp_up_duration - Suitable traffic duration [s].
 | | ... | Type: float
-| | ... | - ramp_up_rate - Suitable transmit rate [tps].
+| | ... | - ramp_up_rate - Suitable unidirectional transmit rate [tps].
 | | ... | Type: float
 | | ... | - transaction_type - String identifier to determine how to count
 | | ... | transactions. Default is "packet".
@@ -360,9 +374,9 @@
 | |
 | | ... | \| Send ramp-up traffic \|
 | |
-| | ${ramp_up_duration} = | Get Ramp Up Duration
-| | Run Keyword Unless | ${ramp_up_duration} > 0.0 | Return From Keyword
 | | ${ramp_up_rate} = | Get Ramp Up Rate
+| | Run Keyword Unless | ${ramp_up_rate} > 0.0 | Fail | Ramp up rate missing!
+| | ${ramp_up_duration} = | Get Ramp Up Duration
 | | ${ppta} = | Get Packets Per Transaction Aggregated
 | | ${traffic_directions} = | Get Traffic Directions
 | | ${transaction_duration} = | Get Transaction Duration
@@ -382,6 +396,9 @@
 | | ... | transaction_duration=${transaction_duration}
 | | ... | transaction_scale=${transaction_scale}
 | | ... | transaction_type=${transaction_type}
+| | ... | ramp_up_duration=${ramp_up_duration}
+| | ... | ramp_up_rate=${ramp_up_rate}
+| | ... | ramp_up_only=${True}
 
 | Send traffic at specified rate
 | | [Documentation]
@@ -393,7 +410,7 @@
 | |
 | | ... | *Arguments:*
 | | ... | - trial_duration - Duration of single trial [s]. Type: float
-| | ... | - rate - Target transmit rate [tps]. Type: float
+| | ... | - rate - Target unidirectional transmit rate [tps]. Type: float
 | | ... | Type: string
 | | ... | - trial_multiplicity - How many trials in this measurement.
 | | ... | Type: boolean
@@ -411,6 +428,8 @@
 | | ... | ${use_latency}=${False} | ${duration_limit}=${0.0}
 | |
 | | ${ppta} = | Get Packets Per Transaction Aggregated
+| | ${ramp_up_duration} = | Get Ramp Up Duration
+| | ${ramp_up_rate} = | Get Ramp Up Rate
 | | ${traffic_directions} = | Get Traffic Directions
 | | ${transaction_duration} = | Get Transaction Duration
 | | ${transaction_scale} = | Get Transaction Scale
@@ -422,7 +441,7 @@
 | | ${results} = | Create List
 | | FOR | ${i} | IN RANGE | ${trial_multiplicity}
 | | | Call Resetter
-| | | Send traffic on tg
+| | | ${result}= | Send traffic on tg
 | | | ... | duration=${trial_duration}
 | | | ... | rate=${rate}
 | | | ... | frame_size=${frame_size}
@@ -435,7 +454,8 @@
 | | | ... | transaction_scale=${transaction_scale}
 | | | ... | transaction_type=${transaction_type}
 | | | ... | use_latency=${use_latency}
-| | | ${result}= | Get Measurement Result
+| | | ... | ramp_up_duration=${ramp_up_duration}
+| | | ... | ramp_up_rate=${ramp_up_rate}
 | | | # Out of several quantities for aborted traffic (duration stretching),
 | | | # the approximated receive rate is the best estimate we have.
 | | | Append To List | ${results} | ${result.approximated_receive_rate}
@@ -445,6 +465,162 @@
 | | END
 | | Return From Keyword | ${results}
 
+| Clear and show runtime counters with running iperf3
+| | [Documentation]
+| | ... | Start traffic at specified rate then clear runtime counters on all
+| | ... | DUTs. Wait for specified amount of time and capture runtime counters
+| | ... | on all DUTs. Finally stop traffic.
+| |
+| | ... | *Example:*
+| |
+| | ... | \| Clear and show runtime counters with running traffic \|
+| |
+| | ${runtime_duration} = | Get Runtime Duration
+| | ${pids}= | iPerf Client Start Remote Exec
+| | | ... | ${nodes['${iperf_client_node}']}
+| | | ... | duration=${-1}
+| | | ... | rate=${None}
+| | | ... | frame_size=${None}
+| | | ... | async_call=True
+| | | ... | warmup_time=0
+| | | ... | traffic_directions=${1}
+| | | ... | namespace=${iperf_client_namespace}
+| | | ... | udp=${iperf_client_udp}
+| | | ... | host=${iperf_server_bind}
+| | | ... | bind=${iperf_client_bind}
+| | | ... | affinity=${iperf_client_affinity}
+| | FOR | ${action} | IN | @{pre_run_stats}
+| | | Run Keyword | Additional Statistics Action For ${action}
+| | END
+| | Sleep | ${runtime_duration}
+| | FOR | ${action} | IN | @{post_run_stats}
+| | | Run Keyword | Additional Statistics Action For ${action}
+| | END
+| | iPerf Client Stop Remote Exec | ${nodes['${iperf_client_node}']} | ${pids}
+
+| Traffic should pass with maximum rate on iPerf3
+| | [Documentation]
+| | ... | Send traffic at maximum rate on iPerf3.
+| |
+| | ... | *Arguments:*
+| | ... | - trial_duration - Duration of single trial [s].
+| | ... | Type: float
+| | ... | - trial_multiplicity - How many trials in this measurement.
+| | ... | Type: integer
+| | ... | - traffic_directions - Bi- (2) or uni- (1) directional traffic;
+| | ... | Type: integer
+| |
+| | ... | *Example:*
+| |
+| | ... | \| Traffic should pass with maximum rate on iPerf3 \| \${1} \| \
+| | ... | \| \${10.0} \| \${2} \|
+| |
+| | [Arguments] | ${trial_duration}=${trial_duration}
+| | ... | ${trial_multiplicity}=${trial_multiplicity}
+| | ... | ${traffic_directions}=${1}
+| |
+| | ${results}= | Send iPerf3 traffic at specified rate
+| | ... | ${trial_duration} | ${None} | ${None}
+| | ... | ${trial_multiplicity} | ${traffic_directions}
+| | Set Test Message | ${\n}iPerf3 trial results
+| | Set Test Message | in Gbits per second: ${results}
+| | ... | append=yes
+
+| Send iPerf3 traffic at specified rate
+| | [Documentation]
+| | ... | Perform a warmup, show runtime counters during it.
+| | ... | Then send traffic at specified rate, possibly multiple trials.
+| | ... | Show various DUT stats, optionally also packet trace.
+| | ... | Return list of measured receive rates.
+| |
+| | ... | *Arguments:*
+| | ... | - trial_duration - Duration of single trial [s].
+| | ... | Type: float
+| | ... | - rate - Target aggregate transmit rate [bps] / Bits per second
+| | ... | Type: float
+| | ... | - frame_size - L2 Frame Size [B].
+| | ... | Type: integer or string
+| | ... | - trial_multiplicity - How many trials in this measurement.
+| | ... | Type: integer
+| | ... | - traffic_directions - Bi- (2) or uni- (1) directional traffic.
+| | ... | Type: integer
+| | ... | - extended_debug - True to enable extended debug.
+| | ... | Type: boolean
+| |
+| | ... | *Example:*
+| |
+| | ... | \| Send iPerf3 traffic at specified rate \| \${1.0} \| ${4000000.0} \
+| | ... | \| \${64} \| \${10} \| \${1} \| ${False} \|
+| |
+| | [Arguments] | ${trial_duration} | ${rate} | ${frame_size}
+| | ... | ${trial_multiplicity}=${trial_multiplicity}
+| | ... | ${traffic_directions}=${1} | ${extended_debug}=${extended_debug}
+| |
+| | Set Test Variable | ${extended_debug}
+| | Set Test Variable | ${rate}
+| | Set Test Variable | ${traffic_directions}
+| |
+| | ${smt_used}= | Is SMT enabled | ${nodes['${iperf_server_node}']['cpuinfo']}
+| | ${vm_status} | ${value}= | Run Keyword And Ignore Error
+| | ... | Get Library Instance | vnf_manager
+| | ${vth}= | Evaluate | (${thr_count_int} + 1)
+| | ${cpu_skip_cnt}= | Set Variable If | '${vm_status}' == 'PASS'
+| | ... | ${CPU_CNT_SYSTEM}
+| | ... | ${${CPU_CNT_SYSTEM} + ${CPU_CNT_MAIN} + ${cpu_count_int} + ${vth}}
+| |
+| | Initialize iPerf Server
+| | ... | ${nodes['${iperf_server_node}']}
+| | ... | pf_key=${iperf_server_pf_key}
+| | ... | interface=${iperf_server_interface}
+| | ... | bind=${iperf_server_bind}
+| | ... | bind_gw=${iperf_server_bind_gw}
+| | ... | bind_mask=${iperf_server_bind_mask}
+| | ... | namespace=${iperf_server_namespace}
+| | ... | cpu_skip_cnt=${cpu_skip_cnt}
+| | Run Keyword If | '${iperf_client_namespace}' is not '${None}'
+| | ... | Set Linux Interface IP
+| | ... | ${nodes['${iperf_client_node}']}
+| | ... | interface=${iperf_client_interface}
+| | ... | ip_addr=${iperf_client_bind}
+| | ... | prefix=${iperf_client_bind_mask}
+| | ... | namespace=${iperf_client_namespace}
+| | Run Keyword If | '${iperf_client_namespace}' is not '${None}'
+| | ... | Add Default Route To Namespace
+| | ... | ${nodes['${iperf_client_node}']}
+| | ... | namespace=${iperf_client_namespace}
+| | ... | default_route=${iperf_client_bind_gw}
+| | ${pre_stats}= | Create List
+| | ... | clear-show-runtime-with-iperf3
+| | ... | vpp-clear-stats | vpp-enable-packettrace | vpp-enable-elog
+| | FOR | ${action} | IN | @{pre_stats}
+| | | Run Keyword | Additional Statistics Action For ${action}
+| | END
+| | ${results} = | Create List
+| | FOR | ${i} | IN RANGE | ${trial_multiplicity}
+| | | ${rr} = | iPerf Client Start Remote Exec
+| | | ... | ${nodes['${iperf_client_node}']}
+| | | ... | duration=${trial_duration}
+| | | ... | rate=${rate}
+| | | ... | frame_size=${frame_size}
+| | | ... | async_call=False
+| | | ... | warmup_time=0
+| | | ... | traffic_directions=${traffic_directions}
+| | | ... | namespace=${iperf_client_namespace}
+| | | ... | udp=${iperf_client_udp}
+| | | ... | host=${iperf_server_bind}
+| | | ... | bind=${iperf_client_bind}
+| | | ... | affinity=${iperf_client_affinity}
+| | | ${conv} = | Convert To Number | ${rr['sum_received']['bits_per_second']}
+| | | ${conv} = | Evaluate | ${conv} / ${1000} / ${1000} / ${1000}
+| | | ${conv} = | Evaluate | "{:.3f}".format(${conv})
+| | | Append To List
+| | | ... | ${results} | ${conv}
+| | END
+| | FOR | ${action} | IN | @{post_stats}
+| | | Run Keyword | Additional Statistics Action For ${action}
+| | END
+| | Return From Keyword | ${results}
+
 | Start Traffic on Background
 | | [Documentation]
 | | ... | Start traffic at specified rate then return control to Robot.
@@ -457,7 +633,7 @@
 | | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: integer or
 | | ... | string
 | | ... | *Arguments:*
-| | ... | - rate - Rate [tps] for sending packets.
+| | ... | - rate - Unidirectional rate [tps] for sending packets.
 | | ... | Type: float
 | |
 | | ... | *Example:*
@@ -467,6 +643,8 @@
 | | [Arguments] | ${rate}
 | |
 | | ${ppta} = | Get Packets Per Transaction Aggregated
+| | ${ramp_up_duration} = | Get Ramp Up Duration
+| | ${ramp_up_rate} = | Get Ramp Up Rate
 | | ${traffic_directions} = | Get Traffic Directions
 | | ${transaction_duration} = | Get Transaction Duration
 | | ${transaction_scale} = | Get Transaction Scale
@@ -482,11 +660,14 @@
 | | ... | async_call=${True}
 | | ... | duration_limit=${0.0}
 | | ... | ppta=${ppta}
+| | ... | ramp_up_duration=${ramp_up_duration}
+| | ... | ramp_up_rate=${ramp_up_rate}
 | | ... | traffic_directions=${traffic_directions}
 | | ... | transaction_duration=${transaction_duration}
 | | ... | transaction_scale=${transaction_scale}
 | | ... | transaction_type=${transaction_type}
 | | ... | use_latency=${use_latency}
+| | # TODO: Ramp-up?
 
 | Stop Running Traffic
 | | [Documentation]