def test_get_next_by_local_search(self, patch): # Without known incumbent class SideEffect(object): def __init__(self): self.call_number = 0 def __call__(self, *args, **kwargs): rval = 9 - self.call_number self.call_number += 1 return (ConfigurationMock(rval), [[rval]]) patch.side_effect = SideEffect() smbo = SMBO(self.scenario, 1) rval = smbo._get_next_by_local_search(num_points=9) self.assertEqual(len(rval), 9) self.assertEqual(patch.call_count, 9) for i in range(9): self.assertIsInstance(rval[i][1], ConfigurationMock) self.assertEqual(rval[i][1].value, 9 - i) self.assertEqual(rval[i][0], 9 - i) self.assertEqual(rval[i][1].origin, 'Local Search') # With known incumbent patch.side_effect = SideEffect() smbo.incumbent = 'Incumbent' rval = smbo._get_next_by_local_search(num_points=10) self.assertEqual(len(rval), 10) self.assertEqual(patch.call_count, 19) # Only the first local search in each iteration starts from the # incumbent self.assertEqual(patch.call_args_list[9][0][0], 'Incumbent') for i in range(10): self.assertEqual(rval[i][1].origin, 'Local Search')
def run_smbo(self, max_iters=1000): global evaluator # == first things first: load the datamanager self.reset_data_manager() # == Initialize SMBO stuff # first create a scenario seed = self.seed # TODO num_params = len(self.config_space.get_hyperparameters()) # allocate a run history run_history = RunHistory() meta_runhistory = RunHistory() meta_runs_dataset_indices = {} num_run = self.start_num_run instance_id = self.dataset_name + SENTINEL # == Train on subset # before doing anything, let us run the default_cfg # on a subset of the available data to ensure that # we at least have some models # we will try three different ratios of decreasing magnitude # in the hope that at least on the last one we will be able # to get a model n_data = self.datamanager.data['X_train'].shape[0] subset_ratio = 10000. / n_data if subset_ratio >= 0.5: subset_ratio = 0.33 subset_ratios = [subset_ratio, subset_ratio * 0.10] else: subset_ratios = [subset_ratio, 500. / n_data] self.logger.info("Training default configurations on a subset of " "%d/%d data points." % (int(n_data * subset_ratio), n_data)) # the time limit for these function evaluations is rigorously # set to only 1/2 of a full function evaluation subset_time_limit = max(5, int(self.func_eval_time_limit / 2)) # the configs we want to run on the data subset are: # 1) the default configs # 2) a set of configs we selected for training on a subset subset_configs = [self.config_space.get_default_configuration()] \ + self.collect_additional_subset_defaults() subset_config_succesful = [False] * len(subset_configs) for subset_config_id, next_config in enumerate(subset_configs): for i, ratio in enumerate(subset_ratios): self.reset_data_manager() n_data_subsample = int(n_data * ratio) # run the config, but throw away the result afterwards # since this cfg was evaluated only on a subset # and we don't want to confuse SMAC self.logger.info( "Starting to evaluate %d on SUBSET " "with size %d and time limit %ds.", num_run, n_data_subsample, subset_time_limit) self.logger.info(next_config) _info = eval_with_limits(self.datamanager, self.tmp_dir, next_config, seed, num_run, self.resampling_strategy, self.resampling_strategy_args, self.memory_limit, subset_time_limit, n_data_subsample) (duration, result, _, additional_run_info, status) = _info self.logger.info( "Finished evaluating %d. configuration on SUBSET. " "Duration %f; loss %f; status %s; additional run " "info: %s ", num_run, duration, result, str(status), additional_run_info) num_run += 1 if i < len(subset_ratios) - 1: if status != StatusType.SUCCESS: # Do not increase num_run here, because we will try # the same configuration with less data self.logger.info( "A CONFIG did not finish " " for subset ratio %f -> going smaller", ratio) continue else: self.logger.info( "Finished SUBSET training sucessfully " "with ratio %f", ratio) subset_config_succesful[subset_config_id] = True break else: if status != StatusType.SUCCESS: self.logger.info( "A CONFIG did not finish " " for subset ratio %f.", ratio) continue else: self.logger.info( "Finished SUBSET training sucessfully " "with ratio %f", ratio) subset_config_succesful[subset_config_id] = True break # Use the first non-failing configuration from the subsets as the new # default configuration -> this guards us against the random forest # failing on large, sparse datasets default_cfg = None for subset_config_id, next_config in enumerate(subset_configs): if subset_config_succesful[subset_config_id]: default_cfg = next_config break if default_cfg is None: default_cfg = self.config_space.get_default_configuration() # == METALEARNING suggestions # we start by evaluating the defaults on the full dataset again # and add the suggestions from metalearning behind it if self.metadata_directory is None: metalearning_directory = os.path.dirname( autosklearn.metalearning.__file__) # There is no multilabel data in OpenML if self.task == MULTILABEL_CLASSIFICATION: meta_task = BINARY_CLASSIFICATION else: meta_task = self.task metadata_directory = os.path.join( metalearning_directory, 'files', '%s_%s_%s' % (METRIC_TO_STRING[self.metric], TASK_TYPES_TO_STRING[meta_task], 'sparse' if self.datamanager.info['is_sparse'] else 'dense')) self.metadata_directory = metadata_directory self.logger.info('Metadata directory: %s', self.metadata_directory) meta_base = MetaBase(self.config_space, self.metadata_directory) metafeature_calculation_time_limit = int(self.total_walltime_limit / 4) metafeature_calculation_start_time = time.time() meta_features = self._calculate_metafeatures_with_limits( metafeature_calculation_time_limit) metafeature_calculation_end_time = time.time() metafeature_calculation_time_limit = \ metafeature_calculation_time_limit - ( metafeature_calculation_end_time - metafeature_calculation_start_time) if metafeature_calculation_time_limit < 1: self.logger.warning( 'Time limit for metafeature calculation less ' 'than 1 seconds (%f). Skipping calculation ' 'of metafeatures for encoded dataset.', metafeature_calculation_time_limit) meta_features_encoded = None else: self.datamanager.perform1HotEncoding() meta_features_encoded = \ self._calculate_metafeatures_encoded_with_limits( metafeature_calculation_time_limit) # In case there is a problem calculating the encoded meta-features if meta_features is None: if meta_features_encoded is not None: meta_features = meta_features_encoded else: if meta_features_encoded is not None: meta_features.metafeature_values.update( meta_features_encoded.metafeature_values) if meta_features is not None: meta_base.add_dataset(instance_id, meta_features) # Do mean imputation of the meta-features - should be done specific # for each prediction model! all_metafeatures = meta_base.get_metafeatures( features=list(meta_features.keys())) all_metafeatures.fillna(all_metafeatures.mean(), inplace=True) metalearning_configurations = self.collect_metalearning_suggestions( meta_base) if metalearning_configurations is None: metalearning_configurations = [] self.reset_data_manager() self.logger.info('%s', meta_features) # Convert meta-features into a dictionary because the scenario # expects a dictionary meta_features_dict = {} for dataset, series in all_metafeatures.iterrows(): meta_features_dict[dataset] = series.values meta_features_list = [] for meta_feature_name in all_metafeatures.columns: meta_features_list.append( meta_features[meta_feature_name].value) meta_features_list = np.array(meta_features_list).reshape((1, -1)) self.logger.info(list(meta_features_dict.keys())) meta_runs = meta_base.get_all_runs(METRIC_TO_STRING[self.metric]) meta_runs_index = 0 try: meta_durations = meta_base.get_all_runs('runtime') read_runtime_data = True except KeyError: read_runtime_data = False self.logger.critical('Cannot read runtime data.') if self.acquisition_function == 'EIPS': self.logger.critical( 'Reverting to acquisition function EI!') self.acquisition_function = 'EI' for meta_dataset in meta_runs.index: meta_dataset_start_index = meta_runs_index for meta_configuration in meta_runs.columns: if np.isfinite(meta_runs.loc[meta_dataset, meta_configuration]): try: config = meta_base.get_configuration_from_algorithm_index( meta_configuration) cost = meta_runs.loc[meta_dataset, meta_configuration] if read_runtime_data: runtime = meta_durations.loc[ meta_dataset, meta_configuration] else: runtime = 1 # TODO read out other status types! meta_runhistory.add(config, cost, runtime, StatusType.SUCCESS, instance_id=meta_dataset) meta_runs_index += 1 except: # TODO maybe add warning pass meta_runs_dataset_indices[meta_dataset] = ( meta_dataset_start_index, meta_runs_index) else: if self.acquisition_function == 'EIPS': self.logger.critical('Reverting to acquisition function EI!') self.acquisition_function = 'EI' meta_features_list = [] meta_features_dict = {} metalearning_configurations = [] self.scenario = AutoMLScenario(self.config_space, self.total_walltime_limit, self.func_eval_time_limit, meta_features_dict, self.tmp_dir, self.shared_mode) types = get_types(self.config_space, self.scenario.feature_array) if self.acquisition_function == 'EI': rh2EPM = RunHistory2EPM4Cost(num_params=num_params, scenario=self.scenario, success_states=None, impute_censored_data=False, impute_state=None) model = RandomForestWithInstances( types, instance_features=meta_features_list, seed=1, num_trees=10) smac = SMBO(self.scenario, model=model, rng=seed) elif self.acquisition_function == 'EIPS': rh2EPM = RunHistory2EPM4EIPS(num_params=num_params, scenario=self.scenario, success_states=None, impute_censored_data=False, impute_state=None) model = UncorrelatedMultiObjectiveRandomForestWithInstances( ['cost', 'runtime'], types, num_trees=10, instance_features=meta_features_list, seed=1) acquisition_function = EIPS(model) smac = SMBO(self.scenario, acquisition_function=acquisition_function, model=model, runhistory2epm=rh2EPM, rng=seed) else: raise ValueError('Unknown acquisition function value %s!' % self.acquisition_function) # Build a runtime model # runtime_rf = RandomForestWithInstances(types, # instance_features=meta_features_list, # seed=1, num_trees=10) # runtime_rh2EPM = RunHistory2EPM4EIPS(num_params=num_params, # scenario=self.scenario, # success_states=None, # impute_censored_data=False, # impute_state=None) # X_runtime, y_runtime = runtime_rh2EPM.transform(meta_runhistory) # runtime_rf.train(X_runtime, y_runtime[:, 1].flatten()) X_meta, Y_meta = rh2EPM.transform(meta_runhistory) # Transform Y_meta on a per-dataset base for meta_dataset in meta_runs_dataset_indices: start_index, end_index = meta_runs_dataset_indices[meta_dataset] end_index += 1 # Python indexing Y_meta[start_index:end_index, 0]\ [Y_meta[start_index:end_index, 0] >2.0] = 2.0 dataset_minimum = np.min(Y_meta[start_index:end_index, 0]) Y_meta[start_index:end_index, 0] = 1 - ((1. - Y_meta[start_index:end_index, 0]) / (1. - dataset_minimum)) Y_meta[start_index:end_index, 0]\ [Y_meta[start_index:end_index, 0] > 2] = 2 # == first, evaluate all metelearning and default configurations for i, next_config in enumerate( ([default_cfg] + metalearning_configurations)): # Do not evaluate default configurations more than once if i >= len([default_cfg]) and next_config in [default_cfg]: continue config_name = 'meta-learning' if i >= len([default_cfg]) \ else 'default' self.logger.info( "Starting to evaluate %d. configuration " "(%s configuration) with time limit %ds.", num_run, config_name, self.func_eval_time_limit) self.logger.info(next_config) self.reset_data_manager() info = eval_with_limits(self.datamanager, self.tmp_dir, next_config, seed, num_run, self.resampling_strategy, self.resampling_strategy_args, self.memory_limit, self.func_eval_time_limit) (duration, result, _, additional_run_info, status) = info run_history.add(config=next_config, cost=result, time=duration, status=status, instance_id=instance_id, seed=seed) run_history.update_cost(next_config, result) self.logger.info( "Finished evaluating %d. configuration. " "Duration %f; loss %f; status %s; additional run " "info: %s ", num_run, duration, result, str(status), additional_run_info) num_run += 1 if smac.incumbent is None: smac.incumbent = next_config elif result < run_history.get_cost(smac.incumbent): smac.incumbent = next_config if self.scenario.shared_model: pSMAC.write(run_history=run_history, output_directory=self.scenario.output_dir, num_run=self.seed) # == after metalearning run SMAC loop smac.runhistory = run_history smac_iter = 0 finished = False while not finished: if self.scenario.shared_model: pSMAC.read(run_history=run_history, output_directory=self.scenario.output_dir, configuration_space=self.config_space, logger=self.logger) next_configs = [] time_for_choose_next = -1 try: X_cfg, Y_cfg = rh2EPM.transform(run_history) if not run_history.empty(): # Update costs by normalization dataset_minimum = np.min(Y_cfg[:, 0]) Y_cfg[:, 0] = 1 - ((1. - Y_cfg[:, 0]) / (1. - dataset_minimum)) Y_cfg[:, 0][Y_cfg[:, 0] > 2] = 2 if len(X_meta) > 0 and len(X_cfg) > 0: pass #X_cfg = np.concatenate((X_meta, X_cfg)) #Y_cfg = np.concatenate((Y_meta, Y_cfg)) elif len(X_meta) > 0: X_cfg = X_meta.copy() Y_cfg = Y_meta.copy() elif len(X_cfg) > 0: X_cfg = X_cfg.copy() Y_cfg = Y_cfg.copy() else: raise ValueError( 'No training data for SMAC random forest!') self.logger.info('Using %d training points for SMAC.' % X_cfg.shape[0]) choose_next_start_time = time.time() next_configs_tmp = smac.choose_next( X_cfg, Y_cfg, num_interleaved_random=110, num_configurations_by_local_search=10, num_configurations_by_random_search_sorted=100) time_for_choose_next = time.time() - choose_next_start_time self.logger.info('Used %g seconds to find next ' 'configurations' % (time_for_choose_next)) next_configs.extend(next_configs_tmp) # TODO put Exception here! except Exception as e: self.logger.error(e) self.logger.error("Error in getting next configurations " "with SMAC. Using random configuration!") next_config = self.config_space.sample_configuration() next_configs.append(next_config) models_fitted_this_iteration = 0 start_time_this_iteration = time.time() for next_config in next_configs: x_runtime = impute_inactive_values(next_config) x_runtime = impute_inactive_values(x_runtime).get_array() # predicted_runtime = runtime_rf.predict_marginalized_over_instances( # x_runtime.reshape((1, -1))) # predicted_runtime = np.exp(predicted_runtime[0][0][0]) - 1 self.logger.info( "Starting to evaluate %d. configuration (from " "SMAC) with time limit %ds.", num_run, self.func_eval_time_limit) self.logger.info(next_config) self.reset_data_manager() info = eval_with_limits(self.datamanager, self.tmp_dir, next_config, seed, num_run, self.resampling_strategy, self.resampling_strategy_args, self.memory_limit, self.func_eval_time_limit) (duration, result, _, additional_run_info, status) = info run_history.add(config=next_config, cost=result, time=duration, status=status, instance_id=instance_id, seed=seed) run_history.update_cost(next_config, result) #self.logger.info('Predicted runtime %g, true runtime %g', # predicted_runtime, duration) # TODO add unittest to make sure everything works fine and # this does not get outdated! if smac.incumbent is None: smac.incumbent = next_config elif result < run_history.get_cost(smac.incumbent): smac.incumbent = next_config self.logger.info( "Finished evaluating %d. configuration. " "Duration: %f; loss: %f; status %s; additional " "run info: %s ", num_run, duration, result, str(status), additional_run_info) smac_iter += 1 num_run += 1 models_fitted_this_iteration += 1 time_used_this_iteration = time.time( ) - start_time_this_iteration if models_fitted_this_iteration >= 2 and \ time_for_choose_next > 0 and \ time_used_this_iteration > time_for_choose_next: break elif time_for_choose_next <= 0 and \ models_fitted_this_iteration >= 1: break elif models_fitted_this_iteration >= 50: break if max_iters is not None: finished = (smac_iter < max_iters) if self.scenario.shared_model: pSMAC.write(run_history=run_history, output_directory=self.scenario.output_dir, num_run=self.seed)
def run_smbo(self, max_iters=1000): global evaluator # == first things first: load the datamanager self.reset_data_manager() # == Initialize SMBO stuff # first create a scenario seed = self.seed # TODO num_params = len(self.config_space.get_hyperparameters()) # allocate a run history run_history = RunHistory() meta_runhistory = RunHistory() meta_runs_dataset_indices = {} num_run = self.start_num_run instance_id = self.dataset_name + SENTINEL # == Train on subset # before doing anything, let us run the default_cfg # on a subset of the available data to ensure that # we at least have some models # we will try three different ratios of decreasing magnitude # in the hope that at least on the last one we will be able # to get a model n_data = self.datamanager.data['X_train'].shape[0] subset_ratio = 10000. / n_data if subset_ratio >= 0.5: subset_ratio = 0.33 subset_ratios = [subset_ratio, subset_ratio * 0.10] else: subset_ratios = [subset_ratio, 500. / n_data] self.logger.info("Training default configurations on a subset of " "%d/%d data points." % (int(n_data * subset_ratio), n_data)) # the time limit for these function evaluations is rigorously # set to only 1/2 of a full function evaluation subset_time_limit = max(5, int(self.func_eval_time_limit / 2)) # the configs we want to run on the data subset are: # 1) the default configs # 2) a set of configs we selected for training on a subset subset_configs = [self.config_space.get_default_configuration()] \ + self.collect_additional_subset_defaults() subset_config_succesful = [False] * len(subset_configs) for subset_config_id, next_config in enumerate(subset_configs): for i, ratio in enumerate(subset_ratios): self.reset_data_manager() n_data_subsample = int(n_data * ratio) # run the config, but throw away the result afterwards # since this cfg was evaluated only on a subset # and we don't want to confuse SMAC self.logger.info("Starting to evaluate %d on SUBSET " "with size %d and time limit %ds.", num_run, n_data_subsample, subset_time_limit) self.logger.info(next_config) _info = eval_with_limits( self.datamanager, self.tmp_dir, next_config, seed, num_run, self.resampling_strategy, self.resampling_strategy_args, self.memory_limit, subset_time_limit, n_data_subsample) (duration, result, _, additional_run_info, status) = _info self.logger.info("Finished evaluating %d. configuration on SUBSET. " "Duration %f; loss %f; status %s; additional run " "info: %s ", num_run, duration, result, str(status), additional_run_info) num_run += 1 if i < len(subset_ratios) - 1: if status != StatusType.SUCCESS: # Do not increase num_run here, because we will try # the same configuration with less data self.logger.info("A CONFIG did not finish " " for subset ratio %f -> going smaller", ratio) continue else: self.logger.info("Finished SUBSET training sucessfully " "with ratio %f", ratio) subset_config_succesful[subset_config_id] = True break else: if status != StatusType.SUCCESS: self.logger.info("A CONFIG did not finish " " for subset ratio %f.", ratio) continue else: self.logger.info("Finished SUBSET training sucessfully " "with ratio %f", ratio) subset_config_succesful[subset_config_id] = True break # Use the first non-failing configuration from the subsets as the new # default configuration -> this guards us against the random forest # failing on large, sparse datasets default_cfg = None for subset_config_id, next_config in enumerate(subset_configs): if subset_config_succesful[subset_config_id]: default_cfg = next_config break if default_cfg is None: default_cfg = self.config_space.get_default_configuration() # == METALEARNING suggestions # we start by evaluating the defaults on the full dataset again # and add the suggestions from metalearning behind it if self.metadata_directory is None: metalearning_directory = os.path.dirname( autosklearn.metalearning.__file__) # There is no multilabel data in OpenML if self.task == MULTILABEL_CLASSIFICATION: meta_task = BINARY_CLASSIFICATION else: meta_task = self.task metadata_directory = os.path.join( metalearning_directory, 'files', '%s_%s_%s' % (METRIC_TO_STRING[self.metric], TASK_TYPES_TO_STRING[meta_task], 'sparse' if self.datamanager.info['is_sparse'] else 'dense')) self.metadata_directory = metadata_directory self.logger.info('Metadata directory: %s', self.metadata_directory) meta_base = MetaBase(self.config_space, self.metadata_directory) metafeature_calculation_time_limit = int( self.total_walltime_limit / 4) metafeature_calculation_start_time = time.time() meta_features = self._calculate_metafeatures_with_limits( metafeature_calculation_time_limit) metafeature_calculation_end_time = time.time() metafeature_calculation_time_limit = \ metafeature_calculation_time_limit - ( metafeature_calculation_end_time - metafeature_calculation_start_time) if metafeature_calculation_time_limit < 1: self.logger.warning('Time limit for metafeature calculation less ' 'than 1 seconds (%f). Skipping calculation ' 'of metafeatures for encoded dataset.', metafeature_calculation_time_limit) meta_features_encoded = None else: self.datamanager.perform1HotEncoding() meta_features_encoded = \ self._calculate_metafeatures_encoded_with_limits( metafeature_calculation_time_limit) # In case there is a problem calculating the encoded meta-features if meta_features is None: if meta_features_encoded is not None: meta_features = meta_features_encoded else: if meta_features_encoded is not None: meta_features.metafeature_values.update( meta_features_encoded.metafeature_values) if meta_features is not None: meta_base.add_dataset(instance_id, meta_features) # Do mean imputation of the meta-features - should be done specific # for each prediction model! all_metafeatures = meta_base.get_metafeatures( features=list(meta_features.keys())) all_metafeatures.fillna(all_metafeatures.mean(), inplace=True) metalearning_configurations = self.collect_metalearning_suggestions( meta_base) if metalearning_configurations is None: metalearning_configurations = [] self.reset_data_manager() self.logger.info('%s', meta_features) # Convert meta-features into a dictionary because the scenario # expects a dictionary meta_features_dict = {} for dataset, series in all_metafeatures.iterrows(): meta_features_dict[dataset] = series.values meta_features_list = [] for meta_feature_name in all_metafeatures.columns: meta_features_list.append(meta_features[meta_feature_name].value) meta_features_list = np.array(meta_features_list).reshape((1, -1)) self.logger.info(list(meta_features_dict.keys())) meta_runs = meta_base.get_all_runs(METRIC_TO_STRING[self.metric]) meta_runs_index = 0 try: meta_durations = meta_base.get_all_runs('runtime') read_runtime_data = True except KeyError: read_runtime_data = False self.logger.critical('Cannot read runtime data.') if self.acquisition_function == 'EIPS': self.logger.critical('Reverting to acquisition function EI!') self.acquisition_function = 'EI' for meta_dataset in meta_runs.index: meta_dataset_start_index = meta_runs_index for meta_configuration in meta_runs.columns: if np.isfinite(meta_runs.loc[meta_dataset, meta_configuration]): try: config = meta_base.get_configuration_from_algorithm_index( meta_configuration) cost = meta_runs.loc[meta_dataset, meta_configuration] if read_runtime_data: runtime = meta_durations.loc[meta_dataset, meta_configuration] else: runtime = 1 # TODO read out other status types! meta_runhistory.add(config, cost, runtime, StatusType.SUCCESS, instance_id=meta_dataset) meta_runs_index += 1 except: # TODO maybe add warning pass meta_runs_dataset_indices[meta_dataset] = ( meta_dataset_start_index, meta_runs_index) else: if self.acquisition_function == 'EIPS': self.logger.critical('Reverting to acquisition function EI!') self.acquisition_function = 'EI' meta_features_list = [] meta_features_dict = {} metalearning_configurations = [] self.scenario = AutoMLScenario(self.config_space, self.total_walltime_limit, self.func_eval_time_limit, meta_features_dict, self.tmp_dir, self.shared_mode) types = get_types(self.config_space, self.scenario.feature_array) if self.acquisition_function == 'EI': rh2EPM = RunHistory2EPM4Cost(num_params=num_params, scenario=self.scenario, success_states=None, impute_censored_data=False, impute_state=None) model = RandomForestWithInstances(types, instance_features=meta_features_list, seed=1, num_trees=10) smac = SMBO(self.scenario, model=model, rng=seed) elif self.acquisition_function == 'EIPS': rh2EPM = RunHistory2EPM4EIPS(num_params=num_params, scenario=self.scenario, success_states=None, impute_censored_data=False, impute_state=None) model = UncorrelatedMultiObjectiveRandomForestWithInstances( ['cost', 'runtime'], types, num_trees = 10, instance_features=meta_features_list, seed=1) acquisition_function = EIPS(model) smac = SMBO(self.scenario, acquisition_function=acquisition_function, model=model, runhistory2epm=rh2EPM, rng=seed) else: raise ValueError('Unknown acquisition function value %s!' % self.acquisition_function) # Build a runtime model # runtime_rf = RandomForestWithInstances(types, # instance_features=meta_features_list, # seed=1, num_trees=10) # runtime_rh2EPM = RunHistory2EPM4EIPS(num_params=num_params, # scenario=self.scenario, # success_states=None, # impute_censored_data=False, # impute_state=None) # X_runtime, y_runtime = runtime_rh2EPM.transform(meta_runhistory) # runtime_rf.train(X_runtime, y_runtime[:, 1].flatten()) X_meta, Y_meta = rh2EPM.transform(meta_runhistory) # Transform Y_meta on a per-dataset base for meta_dataset in meta_runs_dataset_indices: start_index, end_index = meta_runs_dataset_indices[meta_dataset] end_index += 1 # Python indexing Y_meta[start_index:end_index, 0]\ [Y_meta[start_index:end_index, 0] >2.0] = 2.0 dataset_minimum = np.min(Y_meta[start_index:end_index, 0]) Y_meta[start_index:end_index, 0] = 1 - ( (1. - Y_meta[start_index:end_index, 0]) / (1. - dataset_minimum)) Y_meta[start_index:end_index, 0]\ [Y_meta[start_index:end_index, 0] > 2] = 2 # == first, evaluate all metelearning and default configurations for i, next_config in enumerate(([default_cfg] + metalearning_configurations)): # Do not evaluate default configurations more than once if i >= len([default_cfg]) and next_config in [default_cfg]: continue config_name = 'meta-learning' if i >= len([default_cfg]) \ else 'default' self.logger.info("Starting to evaluate %d. configuration " "(%s configuration) with time limit %ds.", num_run, config_name, self.func_eval_time_limit) self.logger.info(next_config) self.reset_data_manager() info = eval_with_limits(self.datamanager, self.tmp_dir, next_config, seed, num_run, self.resampling_strategy, self.resampling_strategy_args, self.memory_limit, self.func_eval_time_limit) (duration, result, _, additional_run_info, status) = info run_history.add(config=next_config, cost=result, time=duration , status=status, instance_id=instance_id, seed=seed) run_history.update_cost(next_config, result) self.logger.info("Finished evaluating %d. configuration. " "Duration %f; loss %f; status %s; additional run " "info: %s ", num_run, duration, result, str(status), additional_run_info) num_run += 1 if smac.incumbent is None: smac.incumbent = next_config elif result < run_history.get_cost(smac.incumbent): smac.incumbent = next_config if self.scenario.shared_model: pSMAC.write(run_history=run_history, output_directory=self.scenario.output_dir, num_run=self.seed) # == after metalearning run SMAC loop smac.runhistory = run_history smac_iter = 0 finished = False while not finished: if self.scenario.shared_model: pSMAC.read(run_history=run_history, output_directory=self.scenario.output_dir, configuration_space=self.config_space, logger=self.logger) next_configs = [] time_for_choose_next = -1 try: X_cfg, Y_cfg = rh2EPM.transform(run_history) if not run_history.empty(): # Update costs by normalization dataset_minimum = np.min(Y_cfg[:, 0]) Y_cfg[:, 0] = 1 - ((1. - Y_cfg[:, 0]) / (1. - dataset_minimum)) Y_cfg[:, 0][Y_cfg[:, 0] > 2] = 2 if len(X_meta) > 0 and len(X_cfg) > 0: pass #X_cfg = np.concatenate((X_meta, X_cfg)) #Y_cfg = np.concatenate((Y_meta, Y_cfg)) elif len(X_meta) > 0: X_cfg = X_meta.copy() Y_cfg = Y_meta.copy() elif len(X_cfg) > 0: X_cfg = X_cfg.copy() Y_cfg = Y_cfg.copy() else: raise ValueError('No training data for SMAC random forest!') self.logger.info('Using %d training points for SMAC.' % X_cfg.shape[0]) choose_next_start_time = time.time() next_configs_tmp = smac.choose_next(X_cfg, Y_cfg, num_interleaved_random=110, num_configurations_by_local_search=10, num_configurations_by_random_search_sorted=100) time_for_choose_next = time.time() - choose_next_start_time self.logger.info('Used %g seconds to find next ' 'configurations' % (time_for_choose_next)) next_configs.extend(next_configs_tmp) # TODO put Exception here! except Exception as e: self.logger.error(e) self.logger.error("Error in getting next configurations " "with SMAC. Using random configuration!") next_config = self.config_space.sample_configuration() next_configs.append(next_config) models_fitted_this_iteration = 0 start_time_this_iteration = time.time() for next_config in next_configs: x_runtime = impute_inactive_values(next_config) x_runtime = impute_inactive_values(x_runtime).get_array() # predicted_runtime = runtime_rf.predict_marginalized_over_instances( # x_runtime.reshape((1, -1))) # predicted_runtime = np.exp(predicted_runtime[0][0][0]) - 1 self.logger.info("Starting to evaluate %d. configuration (from " "SMAC) with time limit %ds.", num_run, self.func_eval_time_limit) self.logger.info(next_config) self.reset_data_manager() info = eval_with_limits(self.datamanager, self.tmp_dir, next_config, seed, num_run, self.resampling_strategy, self.resampling_strategy_args, self.memory_limit, self.func_eval_time_limit) (duration, result, _, additional_run_info, status) = info run_history.add(config=next_config, cost=result, time=duration , status=status, instance_id=instance_id, seed=seed) run_history.update_cost(next_config, result) #self.logger.info('Predicted runtime %g, true runtime %g', # predicted_runtime, duration) # TODO add unittest to make sure everything works fine and # this does not get outdated! if smac.incumbent is None: smac.incumbent = next_config elif result < run_history.get_cost(smac.incumbent): smac.incumbent = next_config self.logger.info("Finished evaluating %d. configuration. " "Duration: %f; loss: %f; status %s; additional " "run info: %s ", num_run, duration, result, str(status), additional_run_info) smac_iter += 1 num_run += 1 models_fitted_this_iteration += 1 time_used_this_iteration = time.time() - start_time_this_iteration if models_fitted_this_iteration >= 2 and \ time_for_choose_next > 0 and \ time_used_this_iteration > time_for_choose_next: break elif time_for_choose_next <= 0 and \ models_fitted_this_iteration >= 1: break elif models_fitted_this_iteration >= 50: break if max_iters is not None: finished = (smac_iter < max_iters) if self.scenario.shared_model: pSMAC.write(run_history=run_history, output_directory=self.scenario.output_dir, num_run=self.seed)