X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=resources%2Flibraries%2Frobot%2Fperformance%2Fperformance_utils.robot;h=9392bc0e8ce03742731f69d5dc1314cc8df72eaf;hb=e5dbe10d9599b9a53fa07e6fadfaf427ba6d69e3;hp=59423304a246081ab17c5571a569dd89d9e092f0;hpb=b6fbffad32515ccf94404680cb5280c2cb561af5;p=csit.git

diff --git a/resources/libraries/robot/performance/performance_utils.robot b/resources/libraries/robot/performance/performance_utils.robot
index 59423304a2..9392bc0e8c 100644
--- a/resources/libraries/robot/performance/performance_utils.robot
+++ b/resources/libraries/robot/performance/performance_utils.robot
@@ -1,4 +1,4 @@
-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2023 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:
@@ -13,11 +13,12 @@
 
 *** Settings ***
 | Library | Collections
+| Library | resources.libraries.python.model.ExportResult
 | Library | resources.libraries.python.topology.Topology
 | Library | resources.libraries.python.NodePath
-| Library | resources.libraries.python.PerfUtil
 | Library | resources.libraries.python.InterfaceUtil
 | Library | resources.libraries.python.Iperf3
+| Library | resources.libraries.python.TelemetryUtil
 | Library | resources.libraries.python.TrafficGenerator
 | Library | resources.libraries.python.TrafficGenerator.OptimizedSearch
 | Library | resources.libraries.python.TrafficGenerator.TGDropRateSearchImpl
@@ -38,53 +39,6 @@
 | ${heap_size_mult}= | ${1}
 
 *** Keywords ***
-| Clear and show runtime counters with running traffic
-| | [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.
-| |
-| | ... | TODO: Support resetter if this is not the first trial-ish action?
-| |
-| | ... | *Example:*
-| |
-| | ... | \| 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
-| | ${transaction_duration} = | Get Transaction Duration
-| | ${transaction_scale} = | Get Transaction Scale
-| | ${transaction_type} = | Get Transaction Type
-| | ${use_latency} = | Get Use Latency
-| | # Duration of -1 means we will stop traffic manually.
-| | Send traffic on tg
-| | ... | duration=${-1}
-| | ... | rate=${runtime_rate}
-| | ... | frame_size=${frame_size}
-| | ... | traffic_profile=${traffic_profile}
-| | ... | async_call=${True}
-| | ... | ppta=${ppta}
-| | ... | use_latency=${use_latency}
-| | ... | traffic_directions=${traffic_directions}
-| | ... | transaction_duration=${transaction_duration}
-| | ... | 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
-| | Sleep | ${runtime_duration}
-| | FOR | ${action} | IN | @{post_run_stats}
-| | | Run Keyword | Additional Statistics Action For ${action}
-| | END
-| | Stop traffic on tg
-
 | Find critical load using PLRsearch
 | | [Documentation]
 | | ... | Find boundaries for troughput (of hardcoded target loss ratio)
@@ -92,7 +46,7 @@
 | | ... | Display results as formatted test message.
 | | ... | Fail if computed lower bound is 110% of the minimal rate or less.
 | | ... | Input rates are unidirectional, in transaction per second.
-| | ... | Reported result may contain aggregate pps rates, depending on test.
+| | ... | Reported result may contain aggregated pps rates, depending on test.
 | | ... | Call \${resetter} (if defined) to reset DUT state before each trial.
 | |
 | | ... | *Test (or broader scope) variables read:*
@@ -119,11 +73,28 @@
 | | ${transaction_scale} = | Get Transaction Scale
 | | ${transaction_type} = | Get Transaction Type
 | | ${use_latency} = | Get Use Latency
+| | # TRex needs a warmup to avoid unsent packets at half-max rate.
+| | Send traffic on tg
+| | ... | duration=1.0
+| | ... | rate=${max_rate}
+| | ... | frame_size=${frame_size}
+| | ... | traffic_profile=${traffic_profile}
+| | ... | async_call=${False}
+| | ... | duration_limit=${1.0}
+| | ... | ppta=${ppta}
+| | ... | traffic_directions=${traffic_directions}
+| | ... | transaction_duration=${transaction_duration}
+| | ... | transaction_scale=${transaction_scale}
+| | ... | transaction_type=${transaction_type}
+| | ... | use_latency=False
+| | ... | ramp_up_duration=${0.0}
+| | ... | ramp_up_rate=${0.0}
+| | # Ready for main search.
 | | ${average} | ${stdev} = | Perform soak search
 | | ... | frame_size=${frame_size}
 | | ... | traffic_profile=${traffic_profile}
-| | ... | minimum_transmit_rate=${min_rate_soft}
-| | ... | maximum_transmit_rate=${max_rate}
+| | ... | min_load=${min_rate_soft}
+| | ... | max_load=${max_rate}
 | | ... | plr_target=${1e-7}
 | | ... | tdpt=${0.1}
 | | ... | initial_count=${50}
@@ -141,6 +112,15 @@
 | | ${lower} | ${upper} = | Display result of soak search
 | | ... | ${average} | ${stdev}
 | | Set Test Variable | \${rate for teardown} | ${lower}
+| | # Stats at the discovered critical rate.
+| | Set Test Variable | ${telemetry_rate} | plr
+| | Set Test Variable | ${telemetry_export} | ${True}
+| | Send traffic at specified rate
+| | ... | rate=${lower}
+| | ... | trial_duration=${1.0}
+| | ... | trial_multiplicity=${1}
+| | ... | use_latency=${use_latency}
+| | ... | duration_limit=${1.0}
 | | Should Not Be True | 1.1 * ${min_rate_soft} > ${lower}
 | | ... | Lower bound ${lower} too small for unidir minimum ${min_rate_soft}.
 
@@ -151,7 +131,7 @@
 | | ... | Display findings as a formatted test message.
 | | ... | 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.
+| | ... | Reported result may contain aggregated 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.
@@ -162,7 +142,7 @@
 | | ... | - traffic_profile - Name of module defining traffc for measurements.
 | | ... | Type: string
 | | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: integer or
-| | ... | string
+| | ... | string.
 | | ... | - max_rate - Calculated maximal unidirectional transmit rate [tps].
 | | ... | Type: float
 | | ... | - resetter - Callable to reset DUT state before each trial.
@@ -180,8 +160,7 @@
 | | ${disable_latency} = | Get Disable Latency
 | | ${max_rate} = | Get Max 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
+| | ${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
@@ -191,17 +170,18 @@
 | | ${transaction_scale} = | Get Transaction Scale
 | | ${transaction_type} = | Get Transaction Type
 | | ${use_latency} = | Get Use Latency
-| | ${result} = | Perform optimized ndrpdr search
+| | ${result} = | Perform MLR Search
 | | ... | frame_size=${frame_size}
 | | ... | traffic_profile=${traffic_profile}
-| | ... | minimum_transmit_rate=${min_rate_soft}
-| | ... | maximum_transmit_rate=${max_rate}
-| | ... | packet_loss_ratio=${packet_loss_ratio}
-| | ... | final_relative_width=${0.005}
-| | ... | final_trial_duration=${30.0}
+| | ... | min_load=${min_rate_soft}
+| | ... | max_load=${max_rate}
+| | ... | loss_ratio=${loss_ratio}
+| | ... | relative_width=${0.005}
 | | ... | initial_trial_duration=${1.0}
-| | ... | number_of_intermediate_phases=${2}
-| | ... | timeout=${720.0}
+| | ... | final_trial_duration=${1.0}
+| | ... | duration_sum=${20.0}
+| | ... | preceding_targets=${2}
+| | ... | search_duration_max=${1200.0}
 | | ... | ppta=${ppta}
 | | ... | resetter=${resetter}
 | | ... | traffic_directions=${traffic_directions}
@@ -211,19 +191,18 @@
 | | ... | 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[1]}
-| | ... | ${packet_loss_ratio}
-| | 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.
+| | ${ndr} | ${pdr} = | Display result of NDRPDR search | ${result}
+| | # We expect NDR and PDR to have different-looking telemetry.
+| | Set Test Variable | ${telemetry_rate} | pdr
+| | Set Test Variable | ${telemetry_export} | ${True}
 | | Send traffic at specified rate
 | | ... | rate=${pdr}
 | | ... | trial_duration=${1.0}
 | | ... | trial_multiplicity=${1}
 | | ... | use_latency=${use_latency}
 | | ... | duration_limit=${1.0}
+| | Set Test Variable | ${telemetry_rate} | ndr
+| | Set Test Variable | ${telemetry_export} | ${True}
 | | Run Keyword If | ${ndr} != ${pdr}
 | | ... | Send traffic at specified rate
 | | ... | rate=${ndr}
@@ -278,17 +257,18 @@
 | | ${transaction_scale} = | Get Transaction Scale
 | | ${transaction_type} = | Get Transaction Type
 | | ${use_latency} = | Get Use Latency
-| | ${result} = | Perform optimized ndrpdr search
+| | ${result} = | Perform MLR Search
 | | ... | frame_size=${frame_size}
 | | ... | traffic_profile=${traffic_profile}
-| | ... | minimum_transmit_rate=${min_rate_soft}
-| | ... | maximum_transmit_rate=${max_rate}
-| | ... | packet_loss_ratio=${0.0}
-| | ... | final_relative_width=${0.001}
-| | ... | final_trial_duration=${10.0}
+| | ... | min_load=${min_rate_soft}
+| | ... | max_load=${max_rate}
+| | ... | loss_ratio=${0.0}
+| | ... | relative_width=${0.001}
 | | ... | initial_trial_duration=${1.0}
-| | ... | number_of_intermediate_phases=${1}
-| | ... | timeout=${720}
+| | ... | final_trial_duration=${1.0}
+| | ... | duration_sum=${10.0}
+| | ... | preceding_targets=${1}
+| | ... | search_duration_max=${1200}
 | | ... | ppta=${ppta}
 | | ... | resetter=${resetter}
 | | ... | traffic_directions=${traffic_directions}
@@ -298,8 +278,8 @@
 | | ... | use_latency=${use_latency}
 | | ... | ramp_up_duration=${ramp_up_duration}
 | | ... | ramp_up_rate=${ramp_up_rate}
-| | Check NDRPDR interval validity | ${result[0]}
-| | Return From Keyword | ${result[0].measured_low.target_tr}
+| | ${ret} = | Convert To Number | ${result[0]}
+| | Return From Keyword | ${ret}
 
 | Measure and show latency at specified rate
 | | [Documentation]
@@ -348,6 +328,7 @@
 | | ... | ramp_up_rate=${ramp_up_rate}
 | | ${latency} = | Get Latency Int
 | | Set Test Message | ${\n}${message_prefix} ${latency} | append=${True}
+| | Export Ndrpdr Latency | ${message_prefix} | ${latency}
 
 | Send ramp-up traffic
 | | [Documentation]
@@ -375,7 +356,7 @@
 | | ... | \| Send ramp-up traffic \|
 | |
 | | ${ramp_up_rate} = | Get Ramp Up Rate
-| | Run Keyword Unless | ${ramp_up_rate} > 0.0 | Fail | Ramp up rate missing!
+| | Run Keyword If | ${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
@@ -418,14 +399,17 @@
 | | ... | Type: boolean
 | | ... | - duration_limit - Hard limit for trial duration, overriding duration
 | | ... | computed from transaction_scale. Default 0.0 means no limit.
+| | ... | - export_mrr_unit - Use this unit when exporting MRR values,
+| | ... | or empty string for no export.
 | |
 | | ... | *Example:*
 | |
 | | ... | \| Send traffic at specified rate \| \${1.0} \| ${4000000.0} \
-| | ... | \| \${10} \| ${False} \| ${1.0} \|
+| | ... | \| \${10} \| ${False} \| ${1.0} \| pps \|
 | |
 | | [Arguments] | ${trial_duration} | ${rate} | ${trial_multiplicity}
 | | ... | ${use_latency}=${False} | ${duration_limit}=${0.0}
+| | ... | ${export_mrr_unit}=${Empty}
 | |
 | | ${ppta} = | Get Packets Per Transaction Aggregated
 | | ${ramp_up_duration} = | Get Ramp Up Duration
@@ -435,13 +419,17 @@
 | | ${transaction_scale} = | Get Transaction Scale
 | | ${transaction_type} = | Get Transaction Type
 | | Set Test Variable | \${rate_for_teardown} | ${rate}
-| | FOR | ${action} | IN | @{pre_stats}
+| | Set Test Variable | \${runtime_rate} | ${rate}
+| | FOR | ${action} | IN | @{stat_runtime}
+| | | Run Keyword | Additional Statistics Action For ${action}
+| | END
+| | FOR | ${action} | IN | @{stat_pre_trial}
 | | | Run Keyword | Additional Statistics Action For ${action}
 | | END
 | | ${results} = | Create List
 | | FOR | ${i} | IN RANGE | ${trial_multiplicity}
 | | | Call Resetter
-| | | ${result}= | Send traffic on tg
+| | | ${result} = | Send traffic on tg
 | | | ... | duration=${trial_duration}
 | | | ... | rate=${rate}
 | | | ... | frame_size=${frame_size}
@@ -458,46 +446,17 @@
 | | | ... | 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}
+| | | ${value} = | Set Variable | ${result.forwarding_count}
+| | | ${value} = | Evaluate | ${value} / ${result.offered_duration}
+| | | ${bandwidth} | ${pps} = | Compute Bandwidth | ${value} / ${ppta}
+| | | Append Mrr Value | ${value} | ${export_mrr_unit} | ${bandwidth * 1e9}
+| | | Append To List | ${results} | ${value}
 | | END
-| | FOR | ${action} | IN | @{post_stats}
+| | FOR | ${action} | IN | @{stat_post_trial}
 | | | Run Keyword | Additional Statistics Action For ${action}
 | | 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.
@@ -519,9 +478,12 @@
 | | ... | ${trial_multiplicity}=${trial_multiplicity}
 | | ... | ${traffic_directions}=${1}
 | |
+| | Set Test Variable | ${telemetry_rate} | mrr
+| | Set Test Variable | ${telemetry_export} | ${True}
 | | ${results}= | Send iPerf3 traffic at specified rate
 | | ... | ${trial_duration} | ${None} | ${None}
 | | ... | ${trial_multiplicity} | ${traffic_directions}
+| | ... | export_mrr_unit=bps
 | | Set Test Message | ${\n}iPerf3 trial results
 | | Set Test Message | in Gbits per second: ${results}
 | | ... | append=yes
@@ -536,7 +498,7 @@
 | | ... | *Arguments:*
 | | ... | - trial_duration - Duration of single trial [s].
 | | ... | Type: float
-| | ... | - rate - Target aggregate transmit rate [bps] / Bits per second
+| | ... | - rate - Target aggregated transmit rate [bps] / Bits per second.
 | | ... | Type: float
 | | ... | - frame_size - L2 Frame Size [B].
 | | ... | Type: integer or string
@@ -546,6 +508,9 @@
 | | ... | Type: integer
 | | ... | - extended_debug - True to enable extended debug.
 | | ... | Type: boolean
+| | ... | - export_mrr_unit - Use this unit when exporting MRR values,
+| | ... | or empty string for no export.
+| | ... | Type: string
 | |
 | | ... | *Example:*
 | |
@@ -555,6 +520,7 @@
 | | [Arguments] | ${trial_duration} | ${rate} | ${frame_size}
 | | ... | ${trial_multiplicity}=${trial_multiplicity}
 | | ... | ${traffic_directions}=${1} | ${extended_debug}=${extended_debug}
+| | ... | ${export_mrr_unit}=${Empty}
 | |
 | | Set Test Variable | ${extended_debug}
 | | Set Test Variable | ${rate}
@@ -563,7 +529,7 @@
 | | ${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)
+| | ${vth}= | Evaluate | (${dp_count_int} + 1)
 | | ${cpu_skip_cnt}= | Set Variable If | '${vm_status}' == 'PASS'
 | | ... | ${CPU_CNT_SYSTEM}
 | | ... | ${${CPU_CNT_SYSTEM} + ${CPU_CNT_MAIN} + ${cpu_count_int} + ${vth}}
@@ -577,22 +543,26 @@
 | | ... | bind_mask=${iperf_server_bind_mask}
 | | ... | namespace=${iperf_server_namespace}
 | | ... | cpu_skip_cnt=${cpu_skip_cnt}
-| | Run Keyword If | '${iperf_client_namespace}' is not '${None}'
+| | Run Keyword If | '${iperf_client_namespace}' != '${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}'
+| | Run Keyword If | '${iperf_client_namespace}' != '${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}
+| | ${stat_runtime}= | Create List
+| | ... | vpp-runtime-iperf3
+| | ${stat_pre_trial}= | Create List
+| | ... | vpp-runtime-iperf3 | vpp-clear-stats | vpp-enable-packettrace
+| | FOR | ${action} | IN | @{stat_runtime}
+| | | Run Keyword | Additional Statistics Action For ${action}
+| | END
+| | FOR | ${action} | IN | @{stat_pre_trial}
 | | | Run Keyword | Additional Statistics Action For ${action}
 | | END
 | | ${results} = | Create List
@@ -611,12 +581,13 @@
 | | | ... | bind=${iperf_client_bind}
 | | | ... | affinity=${iperf_client_affinity}
 | | | ${conv} = | Convert To Number | ${rr['sum_received']['bits_per_second']}
+| | | Append Mrr Value | ${conv} | ${export_mrr_unit}
 | | | ${conv} = | Evaluate | ${conv} / ${1000} / ${1000} / ${1000}
 | | | ${conv} = | Evaluate | "{:.3f}".format(${conv})
 | | | Append To List
 | | | ... | ${results} | ${conv}
 | | END
-| | FOR | ${action} | IN | @{post_stats}
+| | FOR | ${action} | IN | @{stat_post_trial}
 | | | Run Keyword | Additional Statistics Action For ${action}
 | | END
 | | Return From Keyword | ${results}
@@ -667,7 +638,6 @@
 | | ... | transaction_scale=${transaction_scale}
 | | ... | transaction_type=${transaction_type}
 | | ... | use_latency=${use_latency}
-| | # TODO: Ramp-up?
 
 | Stop Running Traffic
 | | [Documentation]
@@ -704,21 +674,25 @@
 | |
 | | ... | \| Traffic should pass with maximum rate \|
 | |
+| | Set Test Variable | ${telemetry_rate} | mrr
+| | Set Test Variable | ${telemetry_export} | ${True}
 | | ${max_rate} = | Get Max Rate
 | | ${transaction_type} = | Get Transaction Type
 | | ${trial_duration} = | Get Mrr Trial Duration
 | | ${trial_multiplicity} = | Get Mrr Trial Multiplicity
 | | ${use_latency} = | Get Use Latency
-| | # The following also sets \${rate_for_teardown}
+| | ${unit} = | Set Variable If | """_cps""" in """${transaction_type}"""
+| | ... | cps | pps
 | | ${results} = | Send traffic at specified rate
 | | ... | rate=${max_rate}
 | | ... | trial_duration=${trial_duration}
 | | ... | trial_multiplicity=${trial_multiplicity}
 | | ... | use_latency=${use_latency}
 | | ... | duration_limit=${0.0}
-| | ${unit} = | Set Variable If | """_cps""" in """${transaction_type}"""
+| | ... | export_mrr_unit=${unit}
+| | ${unit_text} = | Set Variable If | """_cps""" in """${transaction_type}"""
 | | ... | estimated connections per second | packets per second
 | | Set Test Message | ${\n}Maximum Receive Rate trial results
-| | Set Test Message | in ${unit}: ${results}
+| | Set Test Message | in ${unit_text}: ${results}
 | | ... | append=yes
 | | Fail if no traffic forwarded