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authorMiroslav Miklus <mmiklus@cisco.com>2016-09-14 14:51:33 +0200
committerMiroslav Miklus <mmiklus@cisco.com>2016-09-15 18:21:00 +0000
commit490256818796108eb9fc169fc477517c490c5d6a (patch)
treec3faa69daf3bf03c365ea5b1113fbad730abb1b1 /resources/libraries/python
parente9ce3e7fe123c7ed6847e7d615b0e963429b0298 (diff)
CSIT-408 sub-NDR latency measurements
- measure latency at 10% and 50% of found NDR. - fix the accuracy reported by T-REX (round to usec) Change-Id: I9fe2b5f942cb816db6fd0bb4262b48b8da6dac2f Signed-off-by: Miroslav Miklus <mmiklus@cisco.com>
Diffstat (limited to 'resources/libraries/python')
-rw-r--r--resources/libraries/python/DropRateSearch.py11
-rw-r--r--resources/libraries/python/TrafficGenerator.py31
2 files changed, 34 insertions, 8 deletions
diff --git a/resources/libraries/python/DropRateSearch.py b/resources/libraries/python/DropRateSearch.py
index b0f15b25db..6346125592 100644
--- a/resources/libraries/python/DropRateSearch.py
+++ b/resources/libraries/python/DropRateSearch.py
@@ -99,6 +99,15 @@ class DropRateSearch(object):
self._search_result_rate = None
@abstractmethod
+ def get_latency(self):
+ """Return min/avg/max latency.
+
+ :return: Latency stats.
+ :rtype: list
+ """
+ pass
+
+ @abstractmethod
def measure_loss(self, rate, frame_size, loss_acceptance,
loss_acceptance_type, traffic_type):
"""Send traffic from TG and measure count of dropped frames.
@@ -460,7 +469,7 @@ class DropRateSearch(object):
raise Exception('Search FAILED')
elif self._search_result in [SearchResults.SUCCESS,
SearchResults.SUSPICIOUS]:
- return self._search_result_rate, self._latency_stats
+ return self._search_result_rate, self.get_latency()
def binary_search(self, b_min, b_max, traffic_type, skip_max_rate=False):
"""Binary search of rate with loss below acceptance criteria.
diff --git a/resources/libraries/python/TrafficGenerator.py b/resources/libraries/python/TrafficGenerator.py
index 0388179876..2a94912860 100644
--- a/resources/libraries/python/TrafficGenerator.py
+++ b/resources/libraries/python/TrafficGenerator.py
@@ -47,9 +47,6 @@ class TGDropRateSearchImpl(DropRateSearch):
tg_instance.trex_stl_start_remote_exec(self.get_duration(),
unit_rate, frame_size,
traffic_type)
- # Get latency stats from stream
- self._latency_stats = tg_instance.get_latency()
-
loss = tg_instance.get_loss()
sent = tg_instance.get_sent()
if self.loss_acceptance_type_is_percentage():
@@ -66,6 +63,16 @@ class TGDropRateSearchImpl(DropRateSearch):
else:
raise NotImplementedError("TG subtype not supported")
+ def get_latency(self):
+ """Return min/avg/max latency.
+
+ :return: Latency stats.
+ :rtype: list
+ """
+
+ tg_instance = BuiltIn().get_library_instance(
+ 'resources.libraries.python.TrafficGenerator')
+ return tg_instance.get_latency_int()
class TrafficGenerator(object):
"""Traffic Generator."""
@@ -107,8 +114,8 @@ class TrafficGenerator(object):
"""
return self._received
- def get_latency(self):
- """Return min/avg/max latency.
+ def get_latency_int(self):
+ """Return rounded min/avg/max latency.
:return: Latency stats.
:rtype: list
@@ -476,9 +483,19 @@ class TrafficGenerator(object):
self._received = self._result.split(', ')[1].split('=')[1]
self._sent = self._result.split(', ')[2].split('=')[1]
self._loss = self._result.split(', ')[3].split('=')[1]
+
self._latency = []
- self._latency.append(self._result.split(', ')[4].split('=')[1])
- self._latency.append(self._result.split(', ')[5].split('=')[1])
+ lat_int_list = []
+ #round latency numbers
+ lat_str = self._result.split(', ')[4].split('=')[1]
+ for lat in lat_str.split("/"):
+ lat_int_list.append(int(float(lat)))
+ self._latency.append("/".join(str(tmp) for tmp in lat_int_list))
+ lat_int_list = []
+ lat_str = self._result.split(', ')[5].split('=')[1]
+ for lat in lat_str.split("/"):
+ lat_int_list.append(int(float(lat)))
+ self._latency.append("/".join(str(tmp) for tmp in lat_int_list))
def stop_traffic_on_tg(self):
"""Stop all traffic on TG