else:
raise ValueError("Unknown search result type")
-
def linear_search(self, start_rate, traffic_type):
"""Linear search of rate with loss below acceptance criteria.
:param start_rate: Initial rate.
:param traffic_type: Traffic profile.
:type start_rate: float
- :param traffic_type: str
+ :type traffic_type: str
:return: nothing
"""
res = self._get_res_based_on_search_type(res)
if self._search_linear_direction == SearchDirection.BOTTOM_UP:
- # loss occured and it was above acceptance criteria
+ # loss occurred and it was above acceptance criteria
if not res:
# if this is first run then we didn't find drop rate
if prev_rate is None:
raise RuntimeError("Unknown search result")
elif self._search_linear_direction == SearchDirection.TOP_DOWN:
- # loss occured, decrease rate
+ # loss occurred, decrease rate
if not res:
prev_rate = rate
rate -= self._rate_linear_step
SearchResults.SUSPICIOUS]:
return self._search_result_rate
- def binary_search(self, b_min, b_max, traffic_type):
+ def binary_search(self, b_min, b_max, traffic_type, skip_max_rate=False):
"""Binary search of rate with loss below acceptance criteria.
:param b_min: Min range rate.
:param b_max: Max range rate.
:param traffic_type: Traffic profile.
+ :param skip_max_rate: Start with max rate first
:type b_min: float
:type b_max: float
:type traffic_type: str
+ :type skip_max_rate: bool
:return: nothing
"""
if not self._rate_min <= float(b_max) <= self._rate_max:
raise ValueError("Max rate is not in min,max range")
if float(b_max) < float(b_min):
- raise ValueError("Min rate is greater then max rate")
+ raise ValueError("Min rate is greater than max rate")
# binary search
- # rate is half of interval + start of interval
- rate = ((float(b_max) - float(b_min)) / 2) + float(b_min)
+ if skip_max_rate:
+ # rate is half of interval + start of interval
+ rate = ((float(b_max) - float(b_min)) / 2) + float(b_min)
+ else:
+ # rate is max of interval
+ rate = float(b_max)
# rate diff with previous run
rate_diff = abs(self._last_binary_rate - rate)
res = self._get_res_based_on_search_type(res)
- # loss occured and it was above acceptance criteria
+ # loss occurred and it was above acceptance criteria
if not res:
- self.binary_search(b_min, rate, traffic_type)
+ self.binary_search(b_min, rate, traffic_type, True)
# there was no loss / loss below acceptance criteria
else:
self._search_result_rate = rate
- self.binary_search(rate, b_max, traffic_type)
+ self.binary_search(rate, b_max, traffic_type, True)
def combined_search(self, start_rate, traffic_type):
"""Combined search of rate with loss below acceptance criteria.
self._search_result_rate = None
# we will use binary search to refine search in one linear step
- self.binary_search(b_min, b_max, traffic_type)
+ self.binary_search(b_min, b_max, traffic_type, True)
# linear and binary search succeed
if self._search_result == SearchResults.SUCCESS: