-| | ... | Calculate pps for given rate and L2 frame size,
-| | ... | additional 20B are added to L2 frame size as padding.
-| | ...
-| | ... | *Arguments*
-| | ... | - bps - Rate in bps. Type: integer
-| | ... | - framesize - L2 frame size in Bytes. Type: integer
-| | ...
-| | ... | *Return*
-| | ... | - Calculated pps. Type: integer
-| | ...
-| | ... | *Example:*
-| | ...
-| | ... | \| Calculate pps \| 10000000000 \| 64 \|
-| | ...
-| | [Arguments] | ${bps} | ${framesize}
-| | ...
-| | ${framesize}= | Get Frame Size | ${framesize}
-| | ${ret}= | Evaluate | (${bps}/((${framesize}+20)*8)).__trunc__()
-| | Return From Keyword | ${ret}
-
-| Get Frame Size
-| | [Documentation]
-| | ... | Framesize can be either integer in case of a single packet
-| | ... | in stream, or set of packets in case of IMIX type or simmilar.
-| | ... | This keyword returns average framesize.
-| | ...
-| | ... | *Arguments:*
-| | ... | - framesize - Framesize. Type: integer or string
-| | ...
-| | ... | *Example:*
-| | ...
-| | ... | \| Get Frame Size \| IMIX_v4_1 \|
-| | ...
-| | [Arguments] | ${framesize}
-| | ...
-| | Run Keyword If | '${framesize}' == 'IMIX_v4_1'
-| | ... | Return From Keyword | 353.83333
-| | Return From Keyword | ${framesize}
-
-| Is DPDK performance test
-| | [Documentation]
-| | ... | Return TRUE if variable DPDK_TEST exist, otherwise FALSE.
-| | ${ret} | ${tmp}= | Run Keyword And Ignore Error
-| | ... | Variable Should Exist | ${DPDK_TEST}
-| | Return From Keyword If | "${ret}" == "PASS" | ${True}
-| | Return From Keyword | ${False}
-
-| Find NDR using linear search and pps
-| | [Documentation]
-| | ... | Find throughput by using RFC2544 linear search with non drop rate.
-| | ...
-| | ... | *Arguments:*
-| | ... | - framesize - L2 Frame Size [B]. Type: integer
-| | ... | - start_rate - Initial start rate [pps]. Type: float
-| | ... | - step_rate - Step of linear search [pps]. Type: float
-| | ... | - topology_type - Topology type. Type: string
-| | ... | - min_rate - Lower limit of search [pps]. Type: float
-| | ... | - max_rate - Upper limit of search [pps]. Type: float
-| | ...
-| | ... | *Return:*
-| | ... | - No value returned
-| | ...
-| | ... | *Example:*
-| | ...
-| | ... | \| Find NDR using linear search and pps \| 64 \| 5000000 \
-| | ... | \| 100000 \| 3-node-IPv4 \| 100000 \| 14880952 \|
-| | ...
-| | [Arguments] | ${framesize} | ${start_rate} | ${step_rate}
-| | ... | ${topology_type} | ${min_rate} | ${max_rate}
-| | ...
-| | ${duration}= | Set Variable | ${perf_trial_duration}
-| | Set Duration | ${duration}
-| | Set Search Rate Boundaries | ${max_rate} | ${min_rate}
-| | Set Search Linear Step | ${step_rate}
-| | Set Search Frame Size | ${framesize}
-| | Set Search Rate Type pps
-| | Linear Search | ${start_rate} | ${topology_type}
-| | ${rate_per_stream} | ${lat}= | Verify Search Result
-| | ${tmp}= | Create List | 100%NDR | ${lat}
-| | ${latency}= | Create List | ${tmp}
-| | ${rate_50p}= | Evaluate | int(${rate_per_stream}*0.5)
-| | ${lat_50p}= | Measure latency pps | ${duration} | ${rate_50p}
-| | ... | ${framesize} | ${topology_type}
-| | ${tmp}= | Create List | 50%NDR | ${lat_50p}
-| | Append To List | ${latency} | ${tmp}
-| | ${rate_10p}= | Evaluate | int(${rate_per_stream}*0.1)
-| | ${lat_10p}= | Measure latency pps | ${duration} | ${rate_10p}
-| | ... | ${framesize} | ${topology_type}
-| | ${tmp}= | Create List | 10%NDR | ${lat_10p}
-| | Append To List | ${latency} | ${tmp}
-| | Display result of NDR search | ${rate_per_stream} | ${framesize} | 2
-| | ... | ${latency}
-| | Traffic should pass with no loss | ${duration} | ${rate_per_stream}pps
-| | ... | ${framesize} | ${topology_type} | fail_on_loss=${False}
-
-| Find PDR using linear search and pps
-| | [Documentation]
-| | ... | Find throughput by using RFC2544 linear search with partial drop rate
-| | ... | with PDR threshold and type specified by parameter.
-| | ...
+| | ... | 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.
+| | ... | Additional latency measurements are performed for smaller loads,
+| | ... | 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.
+| |
+| | ... | *Test (or broader scope) variables read:*
+| | ... | - traffic_profile - Name of module defining traffc for measurements.
+| | ... | Type: string
+| | ... | - frame_size - L2 Frame Size [B] or IMIX string. Type: int or str
+| | ... | - max_rate - Calculated unidirectional maximal transmit rate [pps].
+| | ... | Type: float
+| |