# Copyright The PyTorch Lightning team. # # 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. from unittest import mock import pytest import torch from torch.utils.data import DataLoader from torchmetrics import Accuracy, AveragePrecision from pytorch_lightning import LightningModule from pytorch_lightning.callbacks.base import Callback from pytorch_lightning.trainer import Trainer from pytorch_lightning.trainer.connectors.logger_connector.fx_validator import FxValidator from pytorch_lightning.trainer.connectors.logger_connector.result import MetricSource, ResultCollection from pytorch_lightning.utilities.exceptions import MisconfigurationException from tests.helpers.boring_model import BoringModel, RandomDataset from tests.helpers.runif import RunIf from tests.models.test_hooks import get_members def test_fx_validator(tmpdir): funcs_name = sorted(get_members(Callback)) callbacks_func = [ "on_before_backward", "on_after_backward", "on_before_optimizer_step", "on_batch_end", "on_batch_start", "on_before_accelerator_backend_setup", "on_before_zero_grad", "on_epoch_end", "on_epoch_start", "on_fit_end", "on_configure_sharded_model", "on_fit_start", "on_init_end", "on_init_start", "on_keyboard_interrupt", "on_load_checkpoint", "on_pretrain_routine_end", "on_pretrain_routine_start", "on_sanity_check_end", "on_sanity_check_start", "on_save_checkpoint", "on_test_batch_end", "on_test_batch_start", "on_test_end", "on_test_epoch_end", "on_test_epoch_start", "on_test_start", "on_train_batch_end", "on_train_batch_start", "on_train_end", "on_train_epoch_end", "on_train_epoch_start", "on_train_start", "on_validation_batch_end", "on_validation_batch_start", "on_validation_end", "on_validation_epoch_end", "on_validation_epoch_start", "on_validation_start", "on_predict_batch_end", "on_predict_batch_start", "on_predict_end", "on_predict_epoch_end", "on_predict_epoch_start", "on_predict_start", "setup", "teardown", ] not_supported = [ "on_before_accelerator_backend_setup", "on_fit_end", "on_fit_start", "on_configure_sharded_model", "on_init_end", "on_init_start", "on_keyboard_interrupt", "on_load_checkpoint", "on_pretrain_routine_end", "on_pretrain_routine_start", "on_sanity_check_end", "on_sanity_check_start", "on_predict_batch_end", "on_predict_batch_start", "on_predict_end", "on_predict_epoch_end", "on_predict_epoch_start", "on_predict_start", "on_save_checkpoint", "on_test_end", "on_train_end", "on_validation_end", "setup", "teardown", ] assert funcs_name == sorted( callbacks_func ), "Detected new callback function. Need to add its logging permission to FxValidator and update this test" validator = FxValidator() for func_name in funcs_name: # This summarizes where and what is currently possible to log using `self.log` is_stage = "train" in func_name or "test" in func_name or "validation" in func_name is_start = "start" in func_name or "batch" in func_name is_epoch = "epoch" in func_name on_step = is_stage and not is_start and not is_epoch on_epoch = True # creating allowed condition allowed = ( is_stage or "batch" in func_name or "epoch" in func_name or "grad" in func_name or "backward" in func_name or "optimizer_step" in func_name ) allowed = ( allowed and "pretrain" not in func_name and "predict" not in func_name and func_name not in ["on_train_end", "on_test_end", "on_validation_end"] ) if allowed: validator.check_logging(fx_name=func_name, on_step=on_step, on_epoch=on_epoch) if not is_start and is_stage: with pytest.raises(MisconfigurationException, match="You can't"): validator.check_logging(fx_name=func_name, on_step=True, on_epoch=on_epoch) else: assert func_name in not_supported with pytest.raises(MisconfigurationException, match="function doesn't support"): validator.check_logging(fx_name=func_name, on_step=on_step, on_epoch=on_epoch) with pytest.raises(RuntimeError, match="`foo` but it is not implemented"): validator.check_logging("foo", False, False) @RunIf(min_gpus=2) def test_epoch_results_cache_dp(tmpdir): root_device = torch.device("cuda", 0) class TestModel(BoringModel): def training_step(self, *args, **kwargs): result = super().training_step(*args, **kwargs) self.log("train_loss_epoch", result["loss"], on_step=False, on_epoch=True) return result def training_step_end(self, training_step_outputs): # required for dp loss = training_step_outputs["loss"].mean() return loss def training_epoch_end(self, outputs): assert all(out["loss"].device == root_device for out in outputs) assert self.trainer.callback_metrics["train_loss_epoch"].device == root_device def validation_step(self, *args, **kwargs): val_loss = torch.rand(1, device=torch.device("cuda", 1)) self.log("val_loss_epoch", val_loss, on_step=False, on_epoch=True) return val_loss def validation_epoch_end(self, outputs): assert all(loss.device == root_device for loss in outputs) assert self.trainer.callback_metrics["val_loss_epoch"].device == root_device def test_step(self, *args, **kwargs): test_loss = torch.rand(1, device=torch.device("cuda", 1)) self.log("test_loss_epoch", test_loss, on_step=False, on_epoch=True) return test_loss def test_epoch_end(self, outputs): assert all(loss.device == root_device for loss in outputs) assert self.trainer.callback_metrics["test_loss_epoch"].device == root_device def train_dataloader(self): return DataLoader(RandomDataset(32, 64), batch_size=4) def val_dataloader(self): return DataLoader(RandomDataset(32, 64), batch_size=4) def test_dataloader(self): return DataLoader(RandomDataset(32, 64), batch_size=4) model = TestModel() trainer = Trainer( default_root_dir=tmpdir, accelerator="dp", gpus=2, limit_train_batches=2, limit_val_batches=2, max_epochs=1 ) trainer.fit(model) trainer.test(model) def test_can_return_tensor_with_more_than_one_element(tmpdir): """Ensure {validation,test}_step return values are not included as callback metrics. #6623""" class TestModel(BoringModel): def validation_step(self, batch, *args, **kwargs): return {"val": torch.tensor([0, 1])} def validation_epoch_end(self, outputs): # ensure validation step returns still appear here assert len(outputs) == 2 assert all(list(d) == ["val"] for d in outputs) # check keys assert all(torch.equal(d["val"], torch.tensor([0, 1])) for d in outputs) # check values def test_step(self, batch, *args, **kwargs): return {"test": torch.tensor([0, 1])} def test_epoch_end(self, outputs): assert len(outputs) == 2 assert all(list(d) == ["test"] for d in outputs) # check keys assert all(torch.equal(d["test"], torch.tensor([0, 1])) for d in outputs) # check values model = TestModel() trainer = Trainer(default_root_dir=tmpdir, fast_dev_run=2, progress_bar_refresh_rate=0) trainer.fit(model) trainer.validate(model) trainer.test(model) def test_logging_to_progress_bar_with_reserved_key(tmpdir): """Test that logging a metric with a reserved name to the progress bar raises a warning.""" class TestModel(BoringModel): def training_step(self, *args, **kwargs): output = super().training_step(*args, **kwargs) self.log("loss", output["loss"], prog_bar=True) return output model = TestModel() trainer = Trainer(default_root_dir=tmpdir, fast_dev_run=True) with pytest.warns(UserWarning, match="The progress bar already tracks a metric with the .* 'loss'"): trainer.fit(model) @pytest.mark.parametrize("add_dataloader_idx", [False, True]) def test_auto_add_dataloader_idx(tmpdir, add_dataloader_idx): """test that auto_add_dataloader_idx argument works""" class TestModel(BoringModel): def val_dataloader(self): dl = super().val_dataloader() return [dl, dl] def validation_step(self, *args, **kwargs): output = super().validation_step(*args[:-1], **kwargs) if add_dataloader_idx: name = "val_loss" else: name = f"val_loss_custom_naming_{args[-1]}" self.log(name, output["x"], add_dataloader_idx=add_dataloader_idx) return output model = TestModel() model.validation_epoch_end = None trainer = Trainer(default_root_dir=tmpdir, fast_dev_run=2) trainer.fit(model) logged = trainer.logged_metrics # Check that the correct keys exist if add_dataloader_idx: assert "val_loss/dataloader_idx_0" in logged assert "val_loss/dataloader_idx_1" in logged else: assert "val_loss_custom_naming_0" in logged assert "val_loss_custom_naming_1" in logged def test_metrics_reset(tmpdir): """Tests that metrics are reset correctly after the end of the train/val/test epoch.""" class TestModel(LightningModule): def __init__(self): super().__init__() self.layer = torch.nn.Linear(32, 1) def _create_metrics(self): acc = Accuracy() acc.reset = mock.Mock(side_effect=acc.reset) ap = AveragePrecision(num_classes=1, pos_label=1) ap.reset = mock.Mock(side_effect=ap.reset) return acc, ap def setup(self, stage): fn = stage if fn == "fit": for stage in ("train", "validate"): acc, ap = self._create_metrics() self.add_module(f"acc_{fn}_{stage}", acc) self.add_module(f"ap_{fn}_{stage}", ap) else: acc, ap = self._create_metrics() stage = self.trainer.state.stage self.add_module(f"acc_{fn}_{stage}", acc) self.add_module(f"ap_{fn}_{stage}", ap) def forward(self, x): return self.layer(x) def _step(self, batch): fn, stage = self.trainer.state.fn, self.trainer.state.stage logits = self(batch) loss = logits.sum() self.log(f"loss/{fn}_{stage}", loss) acc = self._modules[f"acc_{fn}_{stage}"] ap = self._modules[f"ap_{fn}_{stage}"] preds = torch.rand(len(batch)) # Fake preds labels = torch.randint(0, 1, [len(batch)]) # Fake targets acc(preds, labels) ap(preds, labels) # Metric.forward calls reset so reset the mocks here acc.reset.reset_mock() ap.reset.reset_mock() self.log(f"acc/{fn}_{stage}", acc) self.log(f"ap/{fn}_{stage}", ap) return loss def training_step(self, batch, batch_idx, *args, **kwargs): return self._step(batch) def validation_step(self, batch, batch_idx, *args, **kwargs): if self.trainer.sanity_checking: return return self._step(batch) def test_step(self, batch, batch_idx, *args, **kwargs): return self._step(batch) def configure_optimizers(self): optimizer = torch.optim.SGD(self.layer.parameters(), lr=0.1) lr_scheduler = torch.optim.lr_scheduler.StepLR(optimizer, step_size=1) return [optimizer], [lr_scheduler] def train_dataloader(self): return DataLoader(RandomDataset(32, 64)) def val_dataloader(self): return DataLoader(RandomDataset(32, 64)) def test_dataloader(self): return DataLoader(RandomDataset(32, 64)) def _assert_called(model, fn, stage): acc = model._modules[f"acc_{fn}_{stage}"] ap = model._modules[f"ap_{fn}_{stage}"] acc.reset.assert_called_once() ap.reset.assert_called_once() model = TestModel() trainer = Trainer( default_root_dir=tmpdir, limit_train_batches=2, limit_val_batches=2, limit_test_batches=2, max_epochs=1, progress_bar_refresh_rate=0, num_sanity_val_steps=2, checkpoint_callback=False, ) trainer.fit(model) _assert_called(model, "fit", "train") _assert_called(model, "fit", "validate") trainer.validate(model) _assert_called(model, "validate", "validate") trainer.test(model) _assert_called(model, "test", "test") def test_result_collection_on_tensor_with_mean_reduction(): result_collection = ResultCollection(True, torch.device("cpu")) product = [(True, True), (False, True), (True, False), (False, False)] values = torch.arange(1, 10).float() # need to convert to float() due to precision issues using torch 1.4 batches = values * values for i, v in enumerate(values): for prog_bar in [False, True]: for logger in [False, True]: for on_step, on_epoch in product: name = "loss" if on_step: name += "_on_step" if on_epoch: name += "_on_epoch" if prog_bar: name += "_prog_bar" if logger: name += "_logger" result_collection.log( "training_step", name, v, on_step=on_step, on_epoch=on_epoch, batch_size=batches[i], prog_bar=prog_bar, logger=logger, ) total_value = sum(values * batches) total_batches = sum(batches) assert result_collection["training_step.loss_on_step_on_epoch"].value == total_value assert result_collection["training_step.loss_on_step_on_epoch"].cumulated_batch_size == total_batches batch_metrics = result_collection.metrics(True) max_ = max(values) assert batch_metrics[MetricSource.PBAR] == { "loss_on_step_on_epoch_prog_bar_step": max_, "loss_on_step_on_epoch_prog_bar_logger_step": max_, "loss_on_step_prog_bar": max_, "loss_on_step_prog_bar_logger": max_, } assert batch_metrics[MetricSource.LOG] == { "loss_on_step_on_epoch_logger_step": max_, "loss_on_step_logger": max_, "loss_on_step_on_epoch_prog_bar_logger_step": max_, "loss_on_step_prog_bar_logger": max_, } assert batch_metrics[MetricSource.CALLBACK] == { "loss_on_step": max_, "loss_on_step_logger": max_, "loss_on_step_on_epoch": max_, "loss_on_step_on_epoch_logger": max_, "loss_on_step_on_epoch_logger_step": max_, "loss_on_step_on_epoch_prog_bar": max_, "loss_on_step_on_epoch_prog_bar_logger": max_, "loss_on_step_on_epoch_prog_bar_logger_step": max_, "loss_on_step_on_epoch_prog_bar_step": max_, "loss_on_step_on_epoch_step": max_, "loss_on_step_prog_bar": max_, "loss_on_step_prog_bar_logger": max_, } epoch_metrics = result_collection.metrics(False) mean = total_value / total_batches assert epoch_metrics[MetricSource.PBAR] == { "loss_on_epoch_prog_bar": mean, "loss_on_epoch_prog_bar_logger": mean, "loss_on_step_on_epoch_prog_bar_epoch": mean, "loss_on_step_on_epoch_prog_bar_logger_epoch": mean, } assert epoch_metrics[MetricSource.LOG] == { "loss_on_epoch_logger": mean, "loss_on_epoch_prog_bar_logger": mean, "loss_on_step_on_epoch_logger_epoch": mean, "loss_on_step_on_epoch_prog_bar_logger_epoch": mean, } assert epoch_metrics[MetricSource.CALLBACK] == { "loss_on_epoch": mean, "loss_on_epoch_logger": mean, "loss_on_epoch_prog_bar": mean, "loss_on_epoch_prog_bar_logger": mean, "loss_on_step_on_epoch": mean, "loss_on_step_on_epoch_epoch": mean, "loss_on_step_on_epoch_logger": mean, "loss_on_step_on_epoch_logger_epoch": mean, "loss_on_step_on_epoch_prog_bar": mean, "loss_on_step_on_epoch_prog_bar_epoch": mean, "loss_on_step_on_epoch_prog_bar_logger": mean, "loss_on_step_on_epoch_prog_bar_logger_epoch": mean, } def test_logged_metrics_has_logged_epoch_value(tmpdir): class TestModel(BoringModel): def training_step(self, batch, batch_idx): self.log("epoch", -batch_idx, logger=True) return super().training_step(batch, batch_idx) model = TestModel() trainer = Trainer(default_root_dir=tmpdir, fast_dev_run=2) trainer.fit(model) # should not get overridden if logged manually assert trainer.logged_metrics == {"epoch": -1}