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Diffstat (limited to 'resources/libraries/python/MLRsearch/trimmed_stat.py')
-rw-r--r-- | resources/libraries/python/MLRsearch/trimmed_stat.py | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/resources/libraries/python/MLRsearch/trimmed_stat.py b/resources/libraries/python/MLRsearch/trimmed_stat.py new file mode 100644 index 0000000000..0076644aa3 --- /dev/null +++ b/resources/libraries/python/MLRsearch/trimmed_stat.py @@ -0,0 +1,78 @@ +# 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: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +"""Module defining TrimmedStat class.""" + +from __future__ import annotations + +from dataclasses import dataclass +from typing import Optional + +from .discrete_load import DiscreteLoad +from .load_stats import LoadStats +from .target_spec import TargetSpec + + +@dataclass +class TrimmedStat(LoadStats): + """Load stats trimmed to a single target. + + Useful mainly for reporting the overall results. + """ + + def __post_init__(self) -> None: + """Initialize load value and check there is one target to track.""" + super().__post_init__() + if len(self.target_to_stat) != 1: + raise ValueError(f"No single target: {self.target_to_stat!r}") + + @staticmethod + def for_target(stats: LoadStats, target: TargetSpec) -> TrimmedStat: + """Return new instance with only one target in the mapping. + + :param stats: The load stats instance to trim. + :param target: The one target which should remain in the mapping. + :type stats: LoadStats + :type target: TargetSpec + :return: Newly created instance. + :rtype: TrimmedStat + """ + return TrimmedStat( + rounding=stats.rounding, + int_load=stats.int_load, + target_to_stat={target: stats.target_to_stat[target]}, + ) + + @property + def conditional_throughput(self) -> Optional[DiscreteLoad]: + """Compute conditional throughput from the load. + + Target stat has dur_rat_sum and good_long. + The code here adds intended load and handles the case min load is hit. + If min load is not a lower bound, None is returned. + + :return: Conditional throughput assuming self is a relevant lower bound. + :rtype: Optional[DiscreteLoad] + :raises RuntimeError: If target is unclear or load is spurious. + """ + target = list(self.target_to_stat.keys())[0] + _, pes = self.estimates(target) + if not pes: + if int(self): + raise RuntimeError(f"Not a lower bound: {self}") + return None + # TODO: Verify self is really the clo? + stat = self.target_to_stat[target] + loss_ratio = stat.dur_rat_sum / stat.good_long + ret = self * (1.0 - loss_ratio) + return ret |