import tempfile import unittest import torch from diffusers import ( EDMDPMSolverMultistepScheduler, ) from .test_schedulers import SchedulerCommonTest class EDMDPMSolverMultistepSchedulerTest(SchedulerCommonTest): scheduler_classes = (EDMDPMSolverMultistepScheduler,) forward_default_kwargs = (("num_inference_steps", 25),) def get_scheduler_config(self, **kwargs): config = { "sigma_min": 0.002, "sigma_max": 80.0, "sigma_data": 0.5, "num_train_timesteps": 1000, "solver_order": 2, "prediction_type": "epsilon", "thresholding": False, "sample_max_value": 1.0, "algorithm_type": "dpmsolver++", "solver_type": "midpoint", "lower_order_final": False, "euler_at_final": False, "final_sigmas_type": "sigma_min", } config.update(**kwargs) return config def check_over_configs(self, time_step=0, **config): kwargs = dict(self.forward_default_kwargs) num_inference_steps = kwargs.pop("num_inference_steps", None) sample = self.dummy_sample residual = 0.1 * sample dummy_past_residuals = [residual + 0.2, residual + 0.15, residual + 0.10] for scheduler_class in self.scheduler_classes: scheduler_config = self.get_scheduler_config(**config) scheduler = scheduler_class(**scheduler_config) scheduler.set_timesteps(num_inference_steps) # copy over dummy past residuals scheduler.model_outputs = dummy_past_residuals[: scheduler.config.solver_order] with tempfile.TemporaryDirectory() as tmpdirname: scheduler.save_config(tmpdirname) new_scheduler = scheduler_class.from_pretrained(tmpdirname) new_scheduler.set_timesteps(num_inference_steps) # copy over dummy past residuals new_scheduler.model_outputs = dummy_past_residuals[: new_scheduler.config.solver_order] output, new_output = sample, sample for t in range(time_step, time_step + scheduler.config.solver_order + 1): t = new_scheduler.timesteps[t] output = scheduler.step(residual, t, output, **kwargs).prev_sample new_output = new_scheduler.step(residual, t, new_output, **kwargs).prev_sample assert torch.sum(torch.abs(output - new_output)) < 1e-5, "Scheduler outputs are not identical" def test_from_save_pretrained(self): pass def check_over_forward(self, time_step=0, **forward_kwargs): kwargs = dict(self.forward_default_kwargs) num_inference_steps = kwargs.pop("num_inference_steps", None) sample = self.dummy_sample residual = 0.1 * sample dummy_past_residuals = [residual + 0.2, residual + 0.15, residual + 0.10] for scheduler_class in self.scheduler_classes: scheduler_config = self.get_scheduler_config() scheduler = scheduler_class(**scheduler_config) scheduler.set_timesteps(num_inference_steps) # copy over dummy past residuals (must be after setting timesteps) scheduler.model_outputs = dummy_past_residuals[: scheduler.config.solver_order] with tempfile.TemporaryDirectory() as tmpdirname: scheduler.save_config(tmpdirname) new_scheduler = scheduler_class.from_pretrained(tmpdirname) # copy over dummy past residuals new_scheduler.set_timesteps(num_inference_steps) # copy over dummy past residual (must be after setting timesteps) new_scheduler.model_outputs = dummy_past_residuals[: new_scheduler.config.solver_order] time_step = new_scheduler.timesteps[time_step] output = scheduler.step(residual, time_step, sample, **kwargs).prev_sample new_output = new_scheduler.step(residual, time_step, sample, **kwargs).prev_sample assert torch.sum(torch.abs(output - new_output)) < 1e-5, "Scheduler outputs are not identical" def full_loop(self, scheduler=None, **config): if scheduler is None: scheduler_class = self.scheduler_classes[0] scheduler_config = self.get_scheduler_config(**config) scheduler = scheduler_class(**scheduler_config) num_inference_steps = 10 model = self.dummy_model() sample = self.dummy_sample_deter scheduler.set_timesteps(num_inference_steps) for i, t in enumerate(scheduler.timesteps): residual = model(sample, t) sample = scheduler.step(residual, t, sample).prev_sample return sample def test_step_shape(self): kwargs = dict(self.forward_default_kwargs) num_inference_steps = kwargs.pop("num_inference_steps", None) for scheduler_class in self.scheduler_classes: scheduler_config = self.get_scheduler_config() scheduler = scheduler_class(**scheduler_config) sample = self.dummy_sample residual = 0.1 * sample if num_inference_steps is not None and hasattr(scheduler, "set_timesteps"): scheduler.set_timesteps(num_inference_steps) elif num_inference_steps is not None and not hasattr(scheduler, "set_timesteps"): kwargs["num_inference_steps"] = num_inference_steps # copy over dummy past residuals (must be done after set_timesteps) dummy_past_residuals = [residual + 0.2, residual + 0.15, residual + 0.10] scheduler.model_outputs = dummy_past_residuals[: scheduler.config.solver_order] time_step_0 = scheduler.timesteps[5] time_step_1 = scheduler.timesteps[6] output_0 = scheduler.step(residual, time_step_0, sample, **kwargs).prev_sample output_1 = scheduler.step(residual, time_step_1, sample, **kwargs).prev_sample self.assertEqual(output_0.shape, sample.shape) self.assertEqual(output_0.shape, output_1.shape) def test_timesteps(self): for timesteps in [25, 50, 100, 999, 1000]: self.check_over_configs(num_train_timesteps=timesteps) def test_thresholding(self): self.check_over_configs(thresholding=False) for order in [1, 2, 3]: for solver_type in ["midpoint", "heun"]: for threshold in [0.5, 1.0, 2.0]: for prediction_type in ["epsilon", "v_prediction"]: self.check_over_configs( thresholding=True, prediction_type=prediction_type, sample_max_value=threshold, algorithm_type="dpmsolver++", solver_order=order, solver_type=solver_type, ) def test_prediction_type(self): for prediction_type in ["epsilon", "v_prediction"]: self.check_over_configs(prediction_type=prediction_type) # TODO (patil-suraj): Fix this test @unittest.skip("Skip for now, as it failing currently but works with the actual model") def test_solver_order_and_type(self): for algorithm_type in ["dpmsolver++", "sde-dpmsolver++"]: for solver_type in ["midpoint", "heun"]: for order in [1, 2, 3]: for prediction_type in ["epsilon", "v_prediction"]: if algorithm_type == "sde-dpmsolver++": if order == 3: continue else: self.check_over_configs( solver_order=order, solver_type=solver_type, prediction_type=prediction_type, algorithm_type=algorithm_type, ) sample = self.full_loop( solver_order=order, solver_type=solver_type, prediction_type=prediction_type, algorithm_type=algorithm_type, ) assert ( not torch.isnan(sample).any() ), f"Samples have nan numbers, {order}, {solver_type}, {prediction_type}, {algorithm_type}" def test_lower_order_final(self): self.check_over_configs(lower_order_final=True) self.check_over_configs(lower_order_final=False) def test_euler_at_final(self): self.check_over_configs(euler_at_final=True) self.check_over_configs(euler_at_final=False) def test_inference_steps(self): for num_inference_steps in [1, 2, 3, 5, 10, 50, 100, 999, 1000]: self.check_over_forward(num_inference_steps=num_inference_steps, time_step=0) def test_full_loop_no_noise(self): sample = self.full_loop() result_mean = torch.mean(torch.abs(sample)) assert abs(result_mean.item() - 0.0001) < 1e-3 def test_full_loop_with_noise(self): scheduler_class = self.scheduler_classes[0] scheduler_config = self.get_scheduler_config() scheduler = scheduler_class(**scheduler_config) num_inference_steps = 10 t_start = 5 model = self.dummy_model() sample = self.dummy_sample_deter scheduler.set_timesteps(num_inference_steps) # add noise noise = self.dummy_noise_deter timesteps = scheduler.timesteps[t_start * scheduler.order :] sample = scheduler.add_noise(sample, noise, timesteps[:1]) for i, t in enumerate(timesteps): residual = model(sample, t) sample = scheduler.step(residual, t, sample).prev_sample result_sum = torch.sum(torch.abs(sample)) result_mean = torch.mean(torch.abs(sample)) assert abs(result_sum.item() - 8.1661) < 1e-2, f" expected result sum 8.1661, but get {result_sum}" assert abs(result_mean.item() - 0.0106) < 1e-3, f" expected result mean 0.0106, but get {result_mean}" def test_full_loop_no_noise_thres(self): sample = self.full_loop(thresholding=True, dynamic_thresholding_ratio=0.87, sample_max_value=0.5) result_mean = torch.mean(torch.abs(sample)) assert abs(result_mean.item() - 0.0080) < 1e-3 def test_full_loop_with_v_prediction(self): sample = self.full_loop(prediction_type="v_prediction") result_mean = torch.mean(torch.abs(sample)) assert abs(result_mean.item() - 0.0092) < 1e-3 def test_duplicated_timesteps(self, **config): for scheduler_class in self.scheduler_classes: scheduler_config = self.get_scheduler_config(**config) scheduler = scheduler_class(**scheduler_config) scheduler.set_timesteps(scheduler.config.num_train_timesteps) assert len(scheduler.timesteps) == scheduler.num_inference_steps def test_trained_betas(self): pass