[dts] [PATCH V2 13/13] tests/perf_test_base: script

[yufengmx <yufengx.mo@intel.com>]

stage 2 demand as below

#. accepted_tolerance in [test suit].cfg are changed to percentage, if not set,
    it will be set to 2% by default.

#.  delta in json are chagned to percentage.

#. add expected throughput in json.

#. expected_throughput will be forced to NA if it not set.

#. add new conf throughput_stat_sample_interval in conf/<test suite>.cfg, which
    indicates interval of getting throughput statistics in second, e.g.
    throughput_stat_sample_interval = 10
    if not set, it will be set to 5 seconds by default.

#. collect better statistics , get multiple throughput statistics during
    the test run, and compute the average as the final results.
    Every  <throughput_stat_sample_interval >  seconds get throughput once, so it gets multiple throughput statistics during
    the test run, remove the max and the min, then compute the average of the left as the final throughput.

Signed-off-by: yufengmx <yufengx.mo@intel.com>
---
 tests/perf_test_base.py | 84 ++++++++++++++++++++++++++++++++++++++---
 1 file changed, 78 insertions(+), 6 deletions(-)

diff --git a/tests/perf_test_base.py b/tests/perf_test_base.py
index 4b76e6b1..378db7db 100644
--- a/tests/perf_test_base.py
+++ b/tests/perf_test_base.py
@@ -38,6 +38,7 @@ import time
 import traceback
 import texttable
 import json
+import numpy as np
 from enum import Enum, unique
 from pprint import pformat
 from itertools import product
@@ -109,6 +110,12 @@ class STREAM_TYPE(Enum):
     RAW = 'RAW'
 
 
+@unique
+class STAT_ALGORITHM(Enum):
+    ONE = "one"
+    MEAN = "mean"
+
+
 HEADER_SIZE = {
     'ether': 18,
     'ipv4': 20,
@@ -449,6 +456,37 @@ class PerfTestBase(object):
         time.sleep(self.__traffic_stop_wait_time)
         return result
 
+    def __throughput_set_traffic_opt(self, duration):
+        option = {
+            'method': 'throughput',
+            'duration': duration,
+            'interval': self.__throughput_stat_sample_interval,
+        }
+        return option
+
+    def __throughput_calculate_result(self, result):
+        if self.__stat_algorithm is STAT_ALGORITHM.ONE:
+            return result
+        
+        if not result or len(result) <= 0:
+            msg = "failed to get throughput stat"
+            self.logger.error(msg)
+            return (0.0, 0.0)
+
+        result = sorted(result)
+        if self.__stat_algorithm is STAT_ALGORITHM.MEAN:
+            result = result[1:-1] if len(result) >= 5 else result
+            bps, pps = [], []
+            for v1, v2 in result:
+                bps.append(v1), pps.append(v2)
+            ret_stat = round(np.array(bps).mean(), 1), round(np.array(pps).mean(), 1)
+        else:
+            msg = f"current not support algorithm <{self.__stat_algorithm}>"
+            self.logger.warning(msg)
+            ret_stat = (0.0, 0.0)
+
+        return ret_stat
+
     def __throughput(self, l3_proto, mode, frame_size):
         """
         measure __throughput according to Layer-3 Protocol and Lookup Mode
@@ -464,11 +502,11 @@ class PerfTestBase(object):
         option = {
             'stream': streams,
             'rate': 100,
-            'traffic_opt': {
-                'method': 'throughput',
-                'duration': duration, }}
+            'traffic_opt': self.__throughput_set_traffic_opt(duration),
+        }
         # run traffic
         result = self.__send_packets_by_pktgen(option)
+        result = self.__throughput_calculate_result(result)
         # statistics result
         _, pps = result
         self.verify(pps > 0, "No traffic detected")
@@ -871,7 +909,8 @@ class PerfTestBase(object):
     def __json_throughput(self, value):
         return {"unit": "Mpps", "name": "Throughput",
                 "value": round(value[0], 3),
-                "delta": round(value[1], 3),
+                "delta": value[1],
+                "expected": value[2],
                 }
 
     def __json_rate_percent(self, value):
@@ -987,12 +1026,16 @@ class PerfTestBase(object):
                         expected, pps, round(gap, 2))
                     self.logger.error(msg)
             else:
-                expected = pps
+                expected = None
                 msg = ('{0} {1} expected throughput value is not set, '
                        'ignore check').format(config, frame_size)
                 self.logger.warning(msg)
                 status = 'pass'
-            js_results.append([status, [pps, pps - expected], percentage, config, frame_size])
+            js_results.append([
+                status,
+                [pps, (str(round((pps - expected)/expected * 100, 3) ) + '%') if expected is not None else "N/A",
+                 round(expected, 3) if expected is not None else "N/A"],
+                percentage, config, frame_size])
         # save data with json format
         self.__save_throughput_result(self.__cur_case, js_results)
         # display result table
@@ -1394,11 +1437,40 @@ class PerfTestBase(object):
             self.__valports = port_list
         return port_list
 
+    @property
+    def __stat_algorithm(self):
+        algorithm_type = get_enum_name(
+            self.__test_content.get('stat_algorithm') or 'one', STAT_ALGORITHM)
+        return algorithm_type
+
+    @property
+    def __throughput_stat_sample_interval(self):
+        if self.__stat_algorithm is STAT_ALGORITHM.ONE:
+            return None
+        else:
+            return self.__test_content.get('throughput_stat_sample_interval') or 5
+
+    def __parse_accepted_tolerance(self):
+        tolerance = self.__test_content.get('accepted_tolerance')
+        def get_num(value):
+            pat = "(\d+\.?\d?)"
+            result = re.findall(pat, value)
+            return result[0] if result else '2.0'
+
+        if isinstance(tolerance, int):
+            _tolerance = float(tolerance)
+        elif isinstance(tolerance, str):
+            _tolerance = float(tolerance if tolerance.isdigit() else get_num(tolerance))
+        else:
+            _tolerance = None
+        self.__test_content['accepted_tolerance'] = float(_tolerance or 2.0)
+
     def perf_preset_test_environment(self, test_content):
         # if user set port list in cfg file, use
         port_list = self.__preset_port_list(test_content)
         # get test content
         self.__test_content = self.__get_test_content_from_cfg(test_content)
+        self.__parse_accepted_tolerance()
         # prepare target source code application
         self.__preset_compilation()
         # set up testing environment
-- 
2.21.0